JP2012233373A - Fireproof structure and fire-resistant block body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To further improve fire resistance efficiency.SOLUTION: The fireproof structure includes a fire-resistant block body 10 formed of a non-combustible material and closely attached around a through-hole Wa in the rear face of a wall member W1 to cover an area around the through-hole Wa, and a filler 41 filled in a clearance between the inner face of a cable insertion hole 35 and the outer face of a cable C. An axial length L1 of the cable insertion hole 35 is not smaller than a filling length to satisfy the fire resistance efficiency of the filler 41.

Description

  The present invention relates to a fireproof structure and a fireproof block made of a nonflammable material.

  A wiring box is attached to the back of the wall to install equipment on the wall of the building. Furthermore, the wall material for constructing the wall is formed with a through-hole for allowing the cable to pass therethrough in order to connect the cable to the instrument. And, for example, when a fire or the like occurs on the front side of the wall, the wiring box is made of a metal material to suppress the flow of flame, smoke, or toxic gas into the back side of the wall via the through hole. (For example, see Patent Document 1).

  The switch box (wiring box) of Patent Document 1 has a rectangular rectangular box shape made of metal having an opening, and is disposed in the internal space of the fireproof hollow wall. The switch box is fixed by a metal fixing bar interposed between a pair of lightweight studs so that the opening of the switch box is arranged in the inner space at a position facing the opening formed in the fireproof hollow wall. Has been. Further, a metal coating cover having an opening is attached to the opening of the switch box. The front surface of the coating cover is in contact with the opening on the back surface of the fireproof hollow wall.

  A through hole is formed in the side wall of the switch box, and a conduit tube through which a cable is inserted is attached to the through hole. The conduit is inserted into the through hole of the connector protrusion provided on the conduit, and the connector is inserted into the through hole by screwing a nut into the protrusion with the protrusion exposed inside the switch box. As a result, the conduit is attached to the through hole. The entire protrusion and nut are covered closely with a refractory material without any gaps. The refractory material covers the protrusion and the nut in a state where the refractory material extends so as to spread over the entire width of the side wall of the switch box.

  In the event of a fire, the flame first flows into the switch box from the opening of the paint cover. At this time, since the refractory material covers the entire range in the width direction from the paint cover to the bottom wall of the switch box, the refractory material is foamed and expanded by the flame near the paint cover, and the heat from the flame is surely cut off. .

JP 2010-29062 A

  However, the switch box of Patent Document 1 is a separate part from the switch box and is only fixed to a fixing bar interposed between lightweight studs. For this reason, the switch box is only supported by the fixing bar, and a gap is easily formed between the front surface of the coating cover and the periphery of the opening on the back surface of the fireproof hollow wall. As a result, in the event of a fire, the flame near the paint cover may flow into the back of the wall through a gap between the front of the paint cover and the opening around the back of the fireproof hollow wall, It is desired to further improve the fire resistance.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a fireproof structure and a fireproof block body that can further improve the fireproof performance.

  In order to achieve the above object, the invention according to claim 1 is characterized in that a through hole is formed in a wall material and at least a part of the instrument is received from the front side of the wall, and around the through hole in the rear surface of the wall material A fire-resistant block body made of a non-combustible material that is in close contact with the back side of the wall and covers the through-hole, a cable insertion hole that is formed in the fire-resistant block body and through which a cable connected to the instrument is inserted, and the cable A filler made of a heat-expandable material filled in a gap between the inner surface of the insertion hole and the outer surface of the cable, and the length of the cable insertion hole in the axial direction satisfies the fire resistance performance It is summarized that it has a filling length of.

The gist of the invention according to claim 2 is that, in the invention according to claim 1, the cable insertion hole is formed so as to penetrate from the front surface to the rear surface of the refractory block body.
According to a third aspect of the present invention, in the first or second aspect of the present invention, a housing portion for housing a part of the instrument is provided on the front side of the refractory block body. This is the gist.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the fire resistant block body is attached to the wall material on the front side of the fire resistant block body. The gist is that the mounting portion is provided integrally.

  According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the front portion of the refractory block body has a contact portion that contacts the wall material, and the attachment portion includes the attachment portion. The gist of the invention is that a refractory material that adheres closely to the wall material is provided by attaching the refractory block body to the wall material.

  According to a sixth aspect of the present invention, in the invention according to any one of the first to fifth aspects, the refractory block body is integrally provided with a fixing portion for fixing the instrument. It is a summary.

  The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the refractory block body includes a metal refractory box and a ceramic housed in the refractory box. The ceramic board is formed with the cable insertion hole.

The gist of the invention according to claim 8 is that, in the invention according to any one of claims 1 to 7, the filler is made of vulcanized rubber.
The invention according to claim 9 is a fire-resistant block body made of a non-combustible material, and is formed on a wall material, and at least a part of the instrument is closely attached around a through-hole accommodated from the front side of the wall so that the through-hole is formed. The cable insertion hole has a cable insertion hole through which a cable connected to the instrument is inserted, and the length of the cable insertion hole in the axial direction includes an inner surface of the cable insertion hole and an outer surface of the cable. The gist of the present invention is that it has a filling length of a filler that satisfies the fire resistance performance made of a thermally expandable material filled in a gap between the two.

  According to this invention, the fire resistance can be further improved.

The perspective view which shows the wall material in an embodiment, a box main body, the 1st-4th ceramic board, and a cover part. (A) is a front view of a fireproof box, (b) is the sectional view on the AA line of Fig.2 (a). The perspective view of a filler. Sectional drawing which shows a fireproof structure. Sectional drawing which shows the state which the filler expanded. The perspective view which shows the box main body in another embodiment.

Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS.
First, the fireproof block body 10 will be described.
As shown in FIG. 1, the fire-resistant block 10 is made of a non-combustible material, and is in close contact with the rear surface of two gypsum board wall materials W1 that construct a single-sided wall W (hereinafter simply referred to as “wall”). Then, the periphery of the through hole Wa formed in the wall material W1 is covered. The fireproof block body 10 includes a metal fireproof box 11 and first to fourth ceramic boards 31, 32, 33, and 34 accommodated in the fireproof box 11.

  The fireproof box 11 is formed into a bottomed square box shape by integrally assembling a square frame-like box body 12 and a square plate-like lid portion 18 attached to the rear side of the box body 12. The box body 12 is formed of a square annular front end wall 14 and four side walls 13 a to 13 d erected from the four side edges of the front end wall 14. Each of the side walls 13 a to 13 d is provided so as to extend in a direction orthogonal to the front end wall 14. An opening 14 a having a rectangular shape in plan view is formed inside the front end wall 14. Two locking recesses 15 that are recessed toward the front edge of each of the side walls 13a to 13d are formed at the rear end edge of each of the side walls 13a to 13d. In the following description, the side walls facing in the vertical direction in FIG. 1 are referred to as an upper side wall 13a and the lower side wall 13b, and the side walls facing in the left and right direction in FIG. 1 are referred to as a right side wall 13c and a left side wall 13d.

  A mounting piece 16 that protrudes outward is provided on the bottom surface of the locking recess 15 formed in the upper side wall 13a and the lower side wall 13b. Each attachment piece 16 is provided so as to extend in a direction orthogonal to the upper side wall 13a and the lower side wall 13b. Each mounting piece 16 is formed with a lid mounting screw insertion hole 16a through which the lid mounting screw 17 is inserted.

  Two marking lines K1 extending linearly along the front-rear direction of the box body 12 are marked on the outer surfaces of the upper and lower side walls 13a and 13b (in FIG. 1, the markings marked on the upper side wall 13a). Only the line K1 is shown). The ruled line K1 marked on the outer surface of the upper side wall 13a and the ruled line K1 marked on the outer surface of the lower side wall 13b are marked at positions facing each other in the vertical direction. Further, two ruled lines K2 extending linearly along the front-rear direction of the box body 12 are written on the outer surfaces of the right side wall 13c and the left side wall 13d (indicated on the right side wall 13c in FIG. 1). Only the ruled line K2 is shown). The ruled line K2 marked on the outer surface of the right side wall 13c and the ruled line K2 marked on the outer surface of the left side wall 13d are marked at positions facing each other in the left-right direction.

  The front end wall 14 of the box body 12 is a contact portion that contacts the rear surface of the wall material W1. As shown in FIG. 2, the front end surface 14b of the front end wall 14 is provided with a pair of heat-resistant putty P1 extending along the vertical direction and a pair of heat-resistant putty P2 extending along the left-right direction. Each heat-resistant putty P1, P2 is a refractory material having thermal expansibility.

  As shown in FIG. 1, the lid 18 is detachable from the box body 12. Three cable penetration holes 18 a are formed in the lid portion 18. In addition, eight locking projections 19 that can be locked to the respective locking recesses 15 are provided on the peripheral edge of the lid 18. Each locking protrusion 19 has an insertion hole 19a. In a state where each locking projection 19 is locked to each locking recess 15, the locking that locks to the locking recess 15 formed on the upper side wall 13 a and the lower side wall 13 b of each locking projection 19. The projecting piece 19 is overlapped with each mounting piece 16. In a state where each locking protrusion 19 and each mounting piece 16 are overlapped, each insertion hole 19a and the lid portion mounting screw insertion hole 16a are overlapped.

  As shown in FIGS. 2A and 2B, the front end wall 14 of the box main body 12 is provided with four mounting protrusions 21 as mounting portions protruding outward. Each mounting protrusion 21 is formed by cutting and raising a part of the upper side wall 13a and the lower side wall 13b, and is provided so as to extend in a direction orthogonal to the upper side wall 13a and the lower side wall 13b. The front surface 21 a of each mounting protrusion 21 is located on the same plane as the front end surface 14 b of the front end wall 14. Each mounting protrusion 21 is formed with a mounting screw insertion hole 21b through which the mounting screw B1 is inserted.

  Six fixing portions 23 project from the inner edge of the front end wall 14 inward. That is, the fixing portion 23 is provided integrally with the box body 12. Specifically, three fixing portions 23 are provided at predetermined intervals along the left-right direction at the inner edge of the front end wall 14 on the upper wall 13a side, and at the inner edge of the front end wall 14 on the lower wall 13b side. Three fixing portions 23 are provided at regular intervals along the left-right direction, and each of the fixing portions 23 faces each other in the vertical direction. Each fixing portion 23 is formed with a fixing screw insertion hole 23b through which the fixing screw B2 (see FIG. 4) is inserted.

  As shown in FIG. 1, the first to fourth ceramic boards 31, 32, 33, 34 are accommodated in this order from the rear side of the box body 12 in a state where the lid 18 is removed from the box body 12. The The first ceramic board 31 has a receiving hole 31a as a receiving part having a rectangular shape in plan view at the center thereof. Each of the second to fourth ceramic boards 32, 33, 34 is formed with three cable insertion hole forming portions 35 a having a circular hole shape in plan view with a constant interval along the length direction.

  In a state where the second to fourth ceramic boards 32, 33, and 34 are overlapped, the cable insertion hole forming portions 35a formed in the second to fourth ceramic boards 32, 33, and 34 are formed from the second to fourth ceramics. The boards 32, 33, and 34 communicate with each other in the thickness direction. That is, when the second to fourth ceramic boards 32, 33, 34 are overlapped, the cable insertion holes 35 penetrating in the thickness direction of the second to fourth ceramic boards 32, 33, 34 by the cable insertion hole forming portions 35a. Is formed. In the state where the first to fourth ceramic boards 31, 32, 33, 34 are accommodated in the box body 12, the opening edge of the accommodation hole 31 a is located outside the edge of the opening 14 a of the box body 12. Each cable insertion hole 35 is located inside the accommodation hole 31a.

  With the first to fourth ceramic boards 31, 32, 33, 34 being accommodated in the box body 12, the lid mounting screws 17 are screwed into the insertion holes 19 a and the lid mounting screw insertion holes 16 a. . Then, each locking protrusion 19 and each mounting piece 16 are fastened by the lid mounting screw 17, and the lid 18 is attached to the box body 12, and the fireproof block body 10 is configured.

  As shown in FIG. 4, the length L1 in the axial direction of each cable insertion hole 35 (the length from the front surface 321 of the second ceramic 32 to the rear surface 341 of the fourth ceramic board 34) is the inside of each cable insertion hole 35. It is more than the filling length which satisfy | fills the fireproof performance (fireproof standard) of the filler 41 arrange | positioned in (3).

  As shown in FIG. 3, the filler 41 is formed of a heat-expandable heat-resistant material (thermally-expandable material) that satisfies fire resistance (fire-resistance standard), and has a main body 42 formed in a cylindrical shape, and a main body A flange 43 that extends from one end edge of the entire circumference in the circumferential direction is integrally provided. The heat-expandable heat-resistant material is obtained by mixing a heat-expandable material that expands to a volume three times that before heating when it receives heat of 120 ° C. or higher, and undergoes a vulcanization process to a heat-expandable rubber molded into a predetermined shape. is there. The vulcanization step is a step of applying heat to the rubber that has undergone the molding step to cause a vulcanization reaction or an adhesion reaction to obtain a product having rubber elasticity.

  An insertion hole 42 a is formed inside the main body 42. The filler 41 is formed with slits 44 extending in the entire axial direction of the main body 42 and extending in a direction (radial direction) orthogonal to the axial direction. The slit 44 connects the outer surface side of the main body 42 and the outer peripheral end of the flange 43 and the insertion hole 42a so that the insertion hole 42a can be opened outward. A plurality of tongue pieces 46 extending toward the center of the insertion hole 42a are formed on one end side of the main body portion 42 in the axial direction. When the cable C (see FIG. 4) is inserted through the insertion hole 42a, each tongue piece 46 is deformed and comes into close contact with the outer surface of the cable C.

  Next, a method for forming a fireproof structure using the fireproof block body 10 and the filler 41 having the above-described configuration will be described. The first to fourth ceramic boards 31, 32, 33, and 34 are already accommodated in the fireproof box 11.

  First, as shown in FIG. 1, in a state where the rear surface side of the fireproof box 11 is pressed against the rear surface of the wall material W1, the points N1, N2 are located at positions corresponding to the scribe lines K1, K2 on the rear surface of the wall material W1. Write. Subsequently, a rule is written so that the points N1 facing each other in the vertical direction are connected by a straight line M1, and a rule is written so that the points N2 facing each other in the left and right direction are connected by a straight line M2. Then, a square frame indicating the outer shape of the rectangular through hole Wa is drawn on the rear surface of the wall material W1. Then, for example, when the wall material W1 is cut along the square frame using a cutting tool such as a saw, a rectangular through hole Wa is formed in the wall material W1.

  Subsequently, as shown in FIG. 4, the fireproof box 11 is arranged on the rear surface of the wall material W <b> 1 so that the heat-resistant putties P <b> 1 and P <b> 2 abut around the through hole Wa. Then, the mounting screws B1 are inserted into the mounting screw insertion holes 21b, and the mounting screws B1 are forcibly screwed into the wall material W1. By screwing the mounting screw B1 into the wall material W1, each mounting protrusion 21 is pressed to the wall material W1 side, and the entire fireproof box 11 is pressed to the wall material W1 side. Thereby, the fireproof box 11 is attached to the wall material W1 in a state where the heat-resistant putties P1, P2 are in close contact with the rear surface of the wall material W1 so as to cover the periphery of the through hole Wa from the back side of the wall W.

  Subsequently, three cables C (only one is shown in FIG. 4) disposed on the back of the wall W are connected to the cable insertion holes 18a, the cable insertion holes 35, the accommodation holes 31a, the openings 14a, and the through holes Wa. Pull it out to the front side of the wall W. Subsequently, the filler 41 is fitted into each cable C. Further, each cable C is connected to the instrument 52 held by each instrument holding frame 51, and each instrument 52 is inserted into the through hole Wa of the wall material W1 from the front side of the wall W so that each instrument holding frame is inserted. 51 is arranged on the wall W surface. Then, a part of each instrument 52 is accommodated inside the accommodation hole 31a of the first ceramic board 31, and the remaining most part of each instrument 52 is accommodated in the through hole Wa. Further, the flange 43 of each filler 41 abuts against the front surface 321 of the second ceramic board 32, and each main body portion 42 is disposed inside each cable insertion hole 35 to form a fireproof structure. At this time, the distal end portion of each main body portion 42 protrudes out of the fireproof box 11 through the cable insertion hole 18 a of the lid portion 18. As a result, interference between the cable insertion hole 18a and the cable C is avoided by the distal end portion of the main body 42.

  Subsequently, the fixing screws B2 are inserted into the insertion holes 51a formed in the instrument holding frames 51, and the fixing screws B2 are screwed into the fixing screw insertion holes 23b of the fixing portions 23. Then, each instrument holding frame 51 is installed on the wall W surface, and each instrument 52 is installed on the wall W.

Next, the effect | action of the fireproof structure in this embodiment is demonstrated.
When a fire or the like occurs, flame, smoke, toxic gas, or the like flows toward the back side of the wall W through the through hole Wa. However, since the fireproof box 11 having the above configuration covers the periphery of the through hole Wa from the back side of the wall W, the flame, smoke, and toxic gas flowing into the fireproof box 11 are prevented from flowing into the back of the wall W. .

  Further, each mounting protrusion 21 is pressed against the wall material W1 by screwing the mounting screw B1 into the wall material W1, and the entire refractory box 11 is pressed against the wall material W1. Thereby, since the heat-resistant putty P1, P2 is in close contact with the rear surface of the wall material W1 so as to cover the periphery of the through hole Wa from the back side of the wall W, flame, smoke, and the like are interposed between the wall material W1 and the fireproof box 11. Toxic gas or the like is prevented from flowing into the back of the wall W.

  Furthermore, as shown in FIG. 5, the filler 41 is heated by heat such as flame. Here, the length L1 in the axial direction of each cable insertion hole 35 is equal to or longer than the filling length that satisfies the fire resistance performance of the filler 41 disposed inside each cable insertion hole 35. Thereby, the main body portion 42 of each filler 41 expands in the radial direction of each cable insertion hole 35, that is, toward the cable C, and the inner peripheral surface (inner surface) of the cable insertion hole 35 and the outer surface of the cable C The gap between them is filled. As a result, inflow of flame, smoke, toxic gas, etc. to the back of the wall W through the cable insertion hole 35 is prevented.

In the above embodiment, the following effects can be obtained.
(1) The fire-resistant structure is made of a fire-resistant block body 10 made of a non-combustible material in close contact with the periphery of the through-hole Wa on the rear surface of the wall material W1, the inner surface of the cable insertion hole 35, and the outer surface of the cable C. And a filler 41 that fills the gaps between them. Then, the axial length L1 of the cable insertion hole 35 is set to be equal to or longer than the filling length that satisfies the fire resistance performance of the filler 41. Therefore, when a fire or the like occurs, the filler 41 is heated by the heat of the flame and the like, and the filler 41 expands in the radial direction of each cable insertion hole 35, that is, toward the cable C. The gap between the inner peripheral surface and the outer surface of the cable C can be filled efficiently. As a result, it is possible to prevent the flame, smoke, toxic gas, or the like that has flowed into the fireproof block 10 (fireproof box 11) through the through hole Wa from flowing into the back of the wall W. As a result, the fire resistance can be further improved.

  (2) The cable insertion hole 35 penetrates from the front surface 321 of the second ceramic board 32 toward the rear surface 341 of the fourth ceramic board 34. Therefore, the filler 41 can be disposed inside the cable insertion hole 35 simply by inserting the filler 41 from the front surface 321 side of the second ceramic board 32.

  (3) The first ceramic board 31 is formed with an accommodation hole 31a whose opening edge is located outside the edge of the opening 14a of the box body 12, and the part on the back side of the wall W in the instrument 52 is the first ceramic board 31. The board 31 is accommodated inside the accommodation hole 31a. Therefore, when the instrument 52 is inserted into the through hole Wa from the front side of the wall W, a part of the back side of the wall W in the instrument 52 interferes with the first ceramic board 31, and the instrument 52 is accommodated toward the back side of the wall W. It is possible to avoid becoming impossible.

  (4) The mounting protrusion 21 is integrally provided on the front end wall 14 of the box body 12. Therefore, the fireproof box 11 can be attached to the wall material W1 without using another support for attaching the fireproof box 11 to the wall material W1, and the number of parts can be reduced.

  (5) The front end wall 14 is provided with heat-resistant putties P1, P2. Then, the fireproof box 11 is attached to the wall material W1 by the mounting protrusion 21, and the entire fireproof box 11 is pressed against the wall material W1 side. Adhere to the back. Then, it is possible to prevent the flame, smoke, toxic gas and the like from flowing into the back of the wall W through the space between the wall material W1 and the fireproof box 11 by these heat-resistant putties P1, P2.

  (6) The fixing portion 23 is integrally provided on the inner edge portion of the front end wall 14 of the box body 12. Therefore, it is not necessary to separately prepare a fixing member for fixing the instrument 52, and the instrument 52 can be fixed using the fixing portion 23 provided integrally with the box body 12, thereby reducing the number of parts. be able to.

  (7) The refractory block body 10 includes a metal refractory box 11 and first to fourth ceramic boards 31, 32, 33, and 34 accommodated in the refractory box 11. Further, the second to fourth ceramic boards 32, 33, 34 are formed with cable insertion hole forming portions 35 a for forming the cable insertion holes 35. That is, the fireproof block body 10 satisfying the fireproof performance can be formed only by housing the first to fourth ceramic boards 31, 32, 33, 34 in the fireproof box 11.

  (8) The filler 41 is made of vulcanized rubber. Therefore, in order to satisfy the fire resistance performance, it is not necessary to fill the gap between the cable insertion hole 35 and the cable C with a heat-resistant putty, and it is only necessary to insert the filler 41 inside the cable insertion hole 35.

  (9) The front surface 21 a of the mounting protrusion 21 is located on the same plane as the front end surface 14 b of the front end wall 14. Therefore, the attachment protrusion 21 can be as close as possible to the rear surface of the wall material W1. As a result, the fireproof box 11 is pressed against the wall material W1 when the fireproof box 11 is attached to the wall material W1 by the mounting protrusion 21 as compared with the case where the mounting protrusion 21 is separated from the rear surface of the wall material W1. Can be made easier.

  (10) The mounting protrusion 21 is provided so as to protrude outward from the front end wall 14 of the box body 12. Therefore, when mounting the fireproof box 11 to the wall material W1 using the mounting protrusion 21, the mounting screw B1 penetrates the heat-resistant putty P1, P2, and a hole is opened in the heat-resistant putty P1, P2. It can be avoided.

  (11) The front end portion of the main body 42 in the filler 41 protrudes outside the fireproof box 11 through the cable insertion hole 18 a of the lid 18. Therefore, the front end portion of the main body 42 can avoid interference between the cable insertion hole 18a and the cable C.

In addition, you may change the said embodiment as follows.
As in the embodiment shown in FIG. 6, the box body 12 may be integrally provided with a flange 61 that protrudes outward from the front end wall 14 in a square annular shape. The flange 61 is formed with a plurality (four in the embodiment of FIG. 6) of mounting screw insertion holes 61b through which the mounting screws B1 are inserted. Therefore, the flange 61 functions as an attachment portion for attaching the fireproof box 11 to the wall material W1. Further, a pair of heat-resistant putty P3 extending along the vertical direction and a pair of heat-resistant putty P4 extending along the left-right direction are provided on the front surface of the flange 61. Each heat-resistant putty P4 is provided on the front surface of the flange 61 so as to close the mounting screw insertion hole 61b from the front. The portion of the heat-resistant putty P4 that overlaps with the mounting screw insertion hole 61b is formed by the mounting screw B1 inserted through the mounting screw insertion hole 61b passing through the heat-resistant putty P4. Yes.

  In the embodiment, the length L1 in the axial direction of the cable insertion hole 35 is set to be equal to or longer than the filling length that satisfies the fire resistance performance of the filler 41. However, the length in the axial direction of the cable insertion hole 35 is not limited thereto. It may be the same length as the filling length that satisfies the fire resistance performance of the filler 41.

In the embodiment, the filler 41 is a vulcanized and thermally expanded rubber. However, the present invention is not limited to this, and for example, a heat-resistant putty may be used as the filler.
In the embodiment, four ceramic boards 31, 32, 33, and 34 are accommodated in the fireproof box 11, but the number of ceramic boards is not particularly limited.

  In the embodiment, the refractory block body 10 is composed of the metal refractory box 11 and the first to fourth ceramic boards 31, 32, 33, 34 accommodated in the refractory box 11, Not only this but the fireproof block body 10 may be formed from the lump of nonflammable materials, such as iron or concrete.

  In the embodiment, three fixing portions 23 are provided on the upper and lower inner edge portions of the front end wall 14 along the left-right direction. However, the number is not limited to this, and the number of the fixing portions 23 is not particularly limited. .

In the embodiment, the fixing unit 23 may be deleted. In this case, it is necessary to prepare a fixing member for fixing the instrument 52 separately.
In the embodiment, the heat-resistant putty P1, P2 may be deleted.

In the embodiment, the mounting protrusion 21 may be deleted. In this case, it is necessary to use another support for attaching the fireproof box 11 to the wall material W1.
In the embodiment, the first ceramic board 31 may not have the accommodation hole 31a.

  In the embodiment, the cable insertion hole 35 penetrates from the front surface 321 of the second ceramic board 32 toward the rear surface 341 of the fourth ceramic board 34. However, the present invention is not limited to this. It may be bent inside the block body 10 and opened to the upper side of the refractory block body 10.

  In the embodiment, the fire-resistant block body 10 (fire-resistant box 11) is in close contact with the rear surface of the wall material W1 around the through-hole Wa formed in the two wall materials W1 constituting the single-sided wall W. However, the present invention is not limited to this, and the through hole may be covered by being in close contact with the rear surface of the wall material around the through hole formed in the wall material constituting the double-sided wall.

  In the embodiment, one wall material W1 may be used. In this case, the wall material W1 needs to have a thickness that allows at least a part of the instrument 52 to be accommodated from the front side of the wall W.

  C: Cable, P1, P2, P3, P4 ... Heat-resistant putty as fireproof material, W1 ... Wall material, Wa ... Through hole, 10 ... Fireproof block body, 11 ... Fireproof box, 14 ... Front end wall as abutting part , 21... Mounting protrusions as mounting portions, 23... Fixing portions, 31, 32, 33, 34... First to fourth ceramic boards as ceramic boards, 31 a. , 41... Filler, 52... Instrument, 61... Flange as attachment portion, 321.

Claims (9)

A through hole formed in the wall material and containing at least a part of the instrument from the wall front side;
A fire-resistant block body made of a non-combustible material in close contact with the through hole on the rear surface of the wall material and covering the through hole in close contact with the back side of the wall;
A cable insertion hole through which a cable connected to the instrument is formed and formed in the fireproof block body;
A filler made of a heat-expandable material filled in a gap between the inner surface of the cable insertion hole and the outer surface of the cable,
The length of the cable insertion hole in the axial direction has a filling length of the filler that satisfies the fire resistance performance.   The fireproof structure according to claim 1, wherein the cable insertion hole is formed so as to penetrate from the front surface to the rear surface of the fireproof block body.   The fireproof structure according to claim 1 or 2, wherein a housing portion for housing a part of the instrument is provided on a front side of the fireproof block body.   The attachment part for attaching the said fireproof block body to the said wall material is integrally provided in the front side of the said fireproof block body, The any one of Claims 1-3 characterized by the above-mentioned. Fireproof structure as described in. A contact portion that contacts the wall material on the front side of the fireproof block body;
The fireproof material according to claim 4, wherein the contact portion is provided with a fireproof material that adheres to the wall material by attaching the fireproof block body to the wall material by the mounting portion. Construction.   The fireproof structure according to any one of claims 1 to 5, wherein a fixing portion for fixing the appliance is integrally provided in the fireproof block body. The fireproof block body is composed of a metal fireproof box and a ceramic board accommodated in the fireproof box,
The fireproof structure according to any one of claims 1 to 6, wherein the cable insertion hole is formed in the ceramic board.   The fireproof structure according to any one of claims 1 to 7, wherein the filler is made of vulcanized rubber. In fire-resistant block body made of non-combustible material,
It is formed in the wall material and at least a part of the instrument is in a size to cover the through hole in close contact with the periphery of the through hole accommodated from the front side of the wall,
A cable insertion hole through which a cable connected to the instrument is inserted;
The axial length of the cable insertion hole has a filling length of a filler that satisfies the fire resistance performance made of a thermally expandable material filled in a gap between the inner surface of the cable insertion hole and the outer surface of the cable. Fireproof block body characterized by

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