JP6647861B2 - Fireproof ceiling structure - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fireproof ceiling structure in which a fireproof material is covered on beams behind a ceiling of a building.

Patent Literature 1 discloses a fireproof ceiling structure in which a fireproof covering material is provided on a steel beam, a base support is attached to a lower flange, and a ceiling base material is supported by the base support.

JP-A-63-134737

  However, in the above-described conventional fire-resistant ceiling structure, since the base support for supporting the ceiling base material is supported by steel beams, the fire-resistant coating of the steel beams tends to be damaged, and the fire resistance of the building may be reduced. there were.

  The present invention has been made in view of the above circumstances, and provides a fireproof ceiling structure in which a fireproof coating of a beam is unlikely to be damaged.

  The fireproof ceiling structure of the present invention includes a wall, a beam, and a ceiling plate in order to solve the above-described problems. In the fireproof ceiling structure, in which the beam is covered with a fireproof material, the ceiling plate is attached. Is supported by an upper end surface of the wall.

  With the above configuration, since the mounting structure for mounting the ceiling plate is supported by the wall, support using a beam is unnecessary, and it is possible to prevent the fireproof coating of the beam from being easily damaged. . Further, since the mounting structure is supported by the upper end surface of the wall, the ceiling plate can be easily positioned above the upper end of the wall, and a higher ceiling can be realized.

  The mounting structure includes a ceiling base material to which the ceiling board is fixed, a ceiling base fixing member connected to the ceiling base material and fixing the ceiling base material to an upper end surface of the wall, and an edge of the ceiling board. And may be made up of a ceiling parting room.

  The mounting structure portion includes a ceiling parting member that receives the ceiling parting and is fixed to the ceiling base material. A hanging piece depending on the inside may be formed. According to this, it is possible to adopt a structure in which the ceiling parting is not received by the wall material of the wall. In addition, it becomes possible to press down the member inside the wall body with the hanging piece.

  In addition, the fireproof ceiling structure of the present invention includes a wall body, a beam, and a ceiling plate, and in the fireproof ceiling structure in which the beam is covered with a fireproof material, the mounting structure for mounting the ceiling plate includes: It is characterized in that it is supported by a portion of the upper side surface of the wall that has no wall material.

  With the above configuration, since the mounting structure for mounting the ceiling plate is supported by the wall, support using a beam is unnecessary, and it is possible to prevent the fireproof coating of the beam from being easily damaged. . Further, since the mounting structure is supported by the upper side surface portion having no wall material, the load applied to the ceiling plate by the ceiling plate can be reduced as much as possible.

  The wall body may be provided with a wall material on a metal frame, and the mounting structure may be supported by the metal frame. According to this, it is possible to more securely support the ceiling plate by the metal frame than to support the mounting structure with the wall material.

  In addition, the fireproof ceiling structure of the present invention includes a wall body, a beam, and a ceiling plate, and in the fireproof ceiling structure in which the beam is covered with a fireproof material, the mounting structure for mounting the ceiling plate includes: It is characterized in that it is supported on the upper end surface of the wall by a locking portion that is inserted and locked into the ventilation layer formed on the wall.

  With the above configuration, since the mounting structure for mounting the ceiling plate is supported by the wall, support using a beam is unnecessary, and it is possible to prevent the fireproof coating of the beam from being easily damaged. . Further, since the mounting structure can be mounted by inserting the locking portion into the ventilation layer, workability can be improved. Further, since the mounting structure is supported by the upper end surface of the wall, the ceiling plate can be easily positioned above the upper end of the wall, and a higher ceiling can be realized.

  The wall may be provided directly below the beam, and a space may be formed between the beam and an upper portion of the wall. According to this, it is possible to provide a structure in which the mounting structure is provided using the space.

  ADVANTAGE OF THE INVENTION According to this invention, there exists an effect that it becomes difficult to generate | occur | produce a defect in the fireproof coating of the beam behind a ceiling.

It is an explanatory view showing a fireproof ceiling structure according to an embodiment of the present invention. 2A and 2B are views showing a ceiling base fixing material used in the fireproof ceiling structure of FIG. 1, wherein FIG. 1A is a side view, FIG. (C) is a side view in a clockwise 90-degree rotation state of FIG. (A), and (D) is a view as viewed from an arrow A of FIG. (C). 2A and 2B are views showing a ceiling parting receiving member used in the fireproof ceiling structure of FIG. 1, wherein FIG. 1A is a side view, FIG. (C) is a side view of the same figure (A) in a 90-degree clockwise rotation state, (D) is a view of arrow A in FIG. (C), and (E) is an enlargement of FIG. FIG. It is an explanatory view showing a fireproof ceiling structure according to another embodiment of the present invention. 5A and 5B are diagrams showing a ceiling base fixing material used in the fireproof ceiling structure of FIG. 4, wherein FIG. 4A is a plan view, FIG. 4B is a side view, and FIG. It is an explanatory view showing a fireproof ceiling structure according to another embodiment of the present invention. It is the side view which expanded and showed the ceiling base fixing material used by the fireproof ceiling structure of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 1, the fire-resistant ceiling structure according to this embodiment includes a wall 1, a steel beam 2, and a ceiling plate (eave-top plate) 3, and the steel beam 2 is covered with a refractory material 4. ing. The refractory material 4 is made of, for example, a flexible and windable refractory covering material made of heat-resistant rock wool.

  The wall 1 includes, for example, an outer wall 11 and an entrance porch wall 12. The outer wall 11 and the entrance porch wall 12 are fixed to a fixing bracket 13 by bolts and nuts 13a. Further, the steel beam 2 is made of, for example, an H-shaped steel, and an upper portion of the fixing bracket 13 is fixed to a lower flange 21 thereof by bolts and nuts 13b.

  The entrance porch wall 12 is located with a space directly below the steel beam 2. Further, the entrance porch wall 12 includes a frame 12a formed by connecting four metal materials having a substantially U-shaped cross section in a square frame shape, and the bolt / nut 13a is fixed to the frame 12a. . The entrance porch wall 12 is provided by forming a ventilation layer 12c between the glass wool board 12b provided on the surface opposite to the surface on which the bolts / nuts 13a are provided and the glass wool board 12b. Outer wall material 12d.

  The mounting structure 5 for mounting the ceiling plate 3 is supported on the upper surface side of the upper frame portion (the upper end surface of the entrance porch wall 12) in the frame 12a. The mounting structure portion 5 includes a ceiling base material 51 to which the ceiling plate 3 is fixed, and a ceiling base material connected to the ceiling base material 51 and fixing the ceiling base material 51 to the upper end surface of the entrance porch wall 12. It comprises a fixing member 52 and a ceiling parting receiving member 53 which is located on the upper surface of the outer wall material 12 d of the entrance porch wall 12 and is fixed to the ceiling base material 51.

  The ceiling base material 51 includes a hanging tree 51a and a ridge 51b. The hanging tree 51a and the ridge 51b are fixed to each other.

  As shown in FIG. 2, the ceiling base fixing material 52 is formed to have a length of, for example, 910 mm, and is disposed at a predetermined interval between a horizontal plate portion 52 a disposed horizontally and one end of the horizontal plate portion 52 a. It comprises a rising portion 52b with a width of about 50 mm formed upright, and two fixed plate portions 52c bent at both upper sides of the rising portion 52b. The interval between the two fixed plate portions 52c is set to a width in which the hanging tree 51a can enter.

  A through hole 52d is formed in each of the two fixing plate portions 52c, and a screw 501 is driven into the side surface of the hanging tree 51a from the through hole 52d, so that the hanging tree 51a is fixed to the fixing plate portion 52c. Supported by In addition, a through-hole 52e is provided at a predetermined position of the horizontal plate portion 52a. The horizontal plate portion 52a is fixed to the upper surface side of the upper frame portion of the frame 12a by, for example, screwing the bolt 14 from the through-hole 52e. Note that a dedicated nut into which the bolt 14 is screwed may be fixed to the upper frame portion by welding or the like, or the bolt 14 may be fixed to a nut already provided in the upper frame portion for a hook bolt for lifting an outer wall. You may screw it in.

  The ceiling parting receiving member 53 receives the ceiling parting 6 above the outer wall material 12d. Also, as shown in FIG. 3, the ceiling parting receiving member 53 is formed to have a length of, for example, 910 mm, and includes a first horizontal plate portion 53a that is disposed horizontally and a first horizontal plate portion 53a. A rising portion 53b rising from one end side, a second horizontal plate portion 53c formed by bending horizontally at an upper end portion of the rising portion 53b, and a hanging piece 53d hanging from the other end side of the first horizontal plate portion 53a. Consists of A through hole 53e is formed in the second horizontal plate portion 53c. Further, a sealing material 53f made of, for example, foamed rubber is attached to the lower surface of the first horizontal plate portion 53a.

  The first horizontal plate portion 53a is located on the upper surface of the outer wall material 12d of the entrance porch wall 12. The sealing material 53f seals between the lower surface of the first horizontal plate portion 53a and the upper surface of the outer wall material 12d. The second horizontal plate portion 53c is located on the lower surface side of the hanging tree 51a, and a nail is driven into the lower surface of the hanging tree 51a from the through hole 53e to thereby attach the second horizontal plate portion 53c to the hanging tree 51a. Is fixed. The rising portion 53b serves as a receiving surface for receiving the ceiling parting 6. The hanging piece 53d enters the ventilation layer 12c and contacts the upper end of the glass wool board 12b.

  The ceiling partition 6 includes an upper portion 61, a lower portion 62, and a connecting portion 63 connecting these surface portions. The upper part 61 is fixed to the lower surface of the ridge 51b with screws or the like. The connecting portion 63 is provided so as to abut on a rising portion 53 b of the ceiling parting receiving member 53. A sealing material made of, for example, foamed rubber is interposed between the connecting portion 63 and the rising portion 53b. The edge of the ceiling plate 3 is inserted between the upper part 61 and the lower part 62. The ceiling plate 3 is fixed to the lower surface of the ridge 51b with screws or the like.

  With the above configuration, since the mounting structure 5 for mounting the ceiling plate 3 is supported by the entrance porch wall 12, support using the steel beam 2 is unnecessary, and the fireproof coating of the steel beam 2 is not required. Can be less likely to cause defects. Further, since the mounting structure portion 5 is provided on the upper end surface of the entrance porch wall 12, the ceiling plate 3 can be easily positioned above the upper end of the entrance porch wall 12, and a higher ceiling can be obtained. Can be realized.

  If the mounting structure portion 5 has a structure including the ceiling base material 51, the ceiling base fixing material 52, and the ceiling parting receiving member 53, the ceiling parting part 6 is replaced with an outer wall material of the entrance porch wall 12. Instead of receiving at 12d, it is possible to receive at the ceiling parting receiving member 53.

  When the mounting structure portion 5 is supported by the frame portion of the frame 12a of the entrance porch wall 12, the ceiling plate is more firmly supported by the frame 12a than when the mounting structure portion 5 is supported by the outer wall material 12d. 3 can be supported.

  When the hanging piece 53d is formed on the ceiling parting receiving member 53, a member (for example, a glass wool board 12b) inside the entrance porch wall 12 can be pressed by the hanging piece 53d. In addition, the hanging piece 53d contacts the member inside the entrance porch wall 12, so that the ceiling parting receiving member 53 can be positioned, and the position of the ceiling parting receiving member 53 is shifted even when pushed by the ceiling parting part 6. Can be prevented.

  FIG. 4 shows a fireproof ceiling structure according to another embodiment. In this fire-resistant ceiling structure, the mounting structure 7 for mounting the ceiling plate 3 fixes the ceiling base material 71 and the ceiling base material 71 to the side surface of the upper frame portion of the frame 12a of the entrance porch wall 12. And a ceiling base fixing material 72. That is, the mounting structure portion 7 is supported by the side surface of the upper part of the entrance porch wall 12 without the outer wall material 12d.

  The ceiling base material 71 includes a hanging tree 71a and a ridge 71b. The hanging tree 71a and the ridge 71b are fixed to each other.

  The ceiling base fixing material 72 has a space forming part 721 and a base fixing part 722 as shown in FIG. The space forming portion 721 includes a plate portion 721a and four sharp projecting portions 721b formed so as to protrude from the plate portion 721a. The sharp projecting portions 721b are provided on the side surfaces of the upper frame of the entrance porch wall 12. By making contact, a space is formed between the side surface portion of the upper frame and the plate portion 721a, and the crushing of the glass wool board 12b is avoided. A through hole 721c is formed in the plate portion 721a. By screwing the drill screw 73 inserted through the through hole 721c into the side surface of the upper frame of the entrance porch wall 12, the ceiling base fixing material 72 is supported by the side surface of the upper frame.

  With the space forming portion 721 fixed to the side surface portion of the upper frame, the base fixing portion 722 protrudes behind the ceiling. In this state, two through holes 722a formed in the base fixing portion 722 are vertically arranged. By driving a screw or the like into the side surface of the hanging tree 71a from the through hole 722a, the hanging tree 71a is fixed to the ground fixing part 722.

  The upper part 61 of the ceiling parting part 6 is fixed to the lower surface of the edge 71b with screws or the like. The connecting portion 63 is provided so as to contact the outer wall surface material 12 d of the entrance porch wall 12. A sealing material made of, for example, foamed rubber is interposed between the connecting portion 63 and the outer wall material 12d. The edge of the ceiling plate 3 is inserted between the upper part 61 and the lower part 62. The ceiling plate 3 is fixed to the lower surface of the edge 71b with screws or the like.

  As described above, even in the structure in which the mounting structure 7 is fixed to the side surface of the entrance porch wall 12, it is possible to prevent the fireproof coating of the steel beam 2 from being easily damaged. In addition, since the mounting structure 7 is supported on the side of the entrance porch wall 12 where there is no outer wall material 12d, the load applied to the ceiling plate 3 by the ceiling wall 3 is minimized. You can do it. Further, when the mounting structure 7 is supported by the frame portion of the frame 12a of the entrance porch wall 12, the ceiling plate 3 is more strongly supported by the frame 12a than by the outer wall material 12d. Can be.

  In addition, that the said mounting structure part 7 is supported by the side part without the said outer wall material 12d means that the said mounting structure part 7 is not supported via the said outer wall material 12d. Such a structure includes, for example, a structure in which the mounting structure 7 is supported by the frame 12a, and a structure in which the mounting structure 7 is screwed and supported on a base plate fixed to the frame 12a.

  FIG. 6 shows a fireproof ceiling structure according to another embodiment. In this fireproof ceiling structure, the mounting structure portion 8 for mounting the ceiling plate 3 includes a ceiling base material 81 and a ceiling base fixing material 82 that supports the ceiling base material 81 on the upper end surface of the entrance porch wall 12. Become. The ceiling base material 81 is not provided with a hanging tree, and is constituted by a field edge.

  As shown in FIG. 7, the ceiling basement fixing member 82 has, for example, locking portions 822 having a width of about 30 mm formed at predetermined intervals on an edge of a main body 821 having a length of 910 mm. The locking portion 822 is made of elastic spring steel or the like, and is inserted from above into the ventilation layer 12 c formed on the entrance porch wall 12 and locked.

  The locking portion 822 is fixed horizontally to the fixing portion 822a fixed to the main body portion 821, a first hanging portion 822b hanging from the fixing portion 822a, and an end side of the first hanging portion 822b. A horizontal plate portion 822c having substantially the same length as the thickness of the ventilation layer 12c, a second hanging portion 822d hanging from the horizontal plate portion 822c, and an oblique bending at an end side of the second hanging portion 822d. The slanted plate portion 822e has a horizontal length substantially equal to the thickness of the ventilation layer 12c, and is bent obliquely upward at an end side of the slanted plate portion 822e and inserted into the ventilation layer 12c. In the mounted state, a rising portion 822f that can vertically rise in contact with the glass wool board 12b, and is bent at an end side of the rising portion 822f. And the overlapped portion 822g overlying the fixed portion 822a Te consists.

  The main body portion 821 includes a first horizontal portion 821a to which the fixing portion 822a is fixed, a first vertical portion 821b vertically raised on an end side of the first horizontal portion 821a, and a first vertical portion 821b. A second horizontal portion 821c bent horizontally at one end of the second horizontal portion 821c and a second vertical portion 821d vertically raised at the end of the second horizontal portion 821c. On the lower surface of the first horizontal portion 821a, a seal member 821e made of, for example, foamed rubber is provided. The sealing material 821e seals between the lower surface of the first horizontal portion 821a and the upper surface of the outer wall material 12d.

  The connecting portion 63 of the ceiling parting member 6 hits the first vertical portion 821b. A sealing material made of, for example, foamed rubber is interposed between the connecting portion 63 and the first vertical portion 821b. The upper part 61 of the ceiling parting member 6 is fixed to the lower surface side of the second horizontal part 821c with screws or the like. The second vertical portion 821d is fixed to the ceiling base material 81 with screws or the like. The ceiling plate 3 is fixed to the lower surface of the ceiling base material 81 with screws or the like.

  With such a structure, the ceiling base fixing material 82 can be pushed in from the upper side of the entrance porch wall 12, and the locking portion 822 can be inserted into the ventilation layer 12c. The mounting structure 8 (the ceiling base fixing material 82) is mounted by inserting the locking portion 822 into the ventilation layer 12c, so that the workability can be improved. In addition, since the mounting structure 8 is supported by the upper end surface of the entrance porch wall 12, it becomes easy to position the ceiling plate 3 above the upper end of the entrance porch wall 12, so that a higher ceiling can be provided. Can be realized.

  In addition, a bent portion (claw portion) is formed in, for example, the second hanging portion 822d of the locking portion 822, and when the locking portion 822 moves upward, the bent portion is formed on the back surface of the outer wall surface material 12d. If it is made to catch on, it can prevent the above-mentioned lock part 822 rising.

  The embodiments of the present invention have been described with reference to the drawings. However, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiment within the same range as the present invention or within an equivalent range.

1: wall 2: steel beam 3: ceiling plate 4: refractory material 5: mounting structure 6: ceiling parting 7: mounting structure 8: mounting structure 11: outer wall 12: entrance porch wall 12a: frame 12b: glass wool board 12c: Ventilation layer 12d: Outer wall material 13: Fixing bracket 13a: Nut 13b: Nut 14: Bolt 21: Lower flange 51: Ceiling base material 51a: Hanging tree 51b: Field edge 52: Ceiling base fixing material 52a: Horizontal plate part 52b: rising portion 52c: fixed plate portion 52d: through hole 52e: through long hole 53: ceiling parting receiving member 53a: first horizontal plate portion 53b: rising portion 53c: second horizontal plate portion 53d: hanging piece 53e: through hole 53f: Sealing material 61: Upper part 62: Lower part 63: Connecting part 71: Ceiling base material 71a: Suspended tree 71b: Field edge 72: Ceiling base fixing material 73: Drill screw 81 : Ceiling base material 82: ceiling base fixing material 501: screw 721: space forming portion 721a: plate portion 721b: sharp projecting portion 721c: through hole 722: base fixing portion 722a: through hole 821: main body portion 821a: first horizontal portion 821b: first vertical portion 821c: second horizontal portion 821d: second vertical portion 821e: sealing material 822: locking portion 822a: fixing portion 822b: first hanging portion 822c: horizontal plate portion 822d: second hanging portion 822e: Slanted plate portion 822f: rising portion 822g: overlapping portion

Claims (4)

A fireproof ceiling structure comprising a wall, a beam, and a ceiling plate, wherein the beam is covered with a fireproof material, and a mounting structure for mounting the ceiling plate is supported by an upper end surface of the wall. ,
The mounting structure includes a ceiling base material to which the ceiling board is fixed, a ceiling base fixing member connected to the ceiling base material and fixing the ceiling base material to an upper end surface of the wall, and an edge of the ceiling board. And a ceiling close-off provided in the
Further, the mounting structure portion includes a ceiling parting member that receives the ceiling parting and is fixed to the ceiling base material, and the ceiling parting member includes a ceiling wall part from the top surface of the wall member of the wall body. refractory ceiling structure according to claim Rukoto hanging pieces hanging the inner side of the body is formed. 2. The fire-resistant ceiling structure according to claim 1 , wherein the wall body is provided with a wall material on a metal frame, and the mounting structure is supported by the metal frame.   In a fireproof ceiling structure comprising a wall, a beam, and a ceiling plate, wherein the beam is covered with a fireproof material, a mounting structure for mounting the ceiling plate is provided on a ventilation layer formed on the wall. A fire-resistant ceiling structure, which is supported at an upper end surface of the wall by a locking portion that is inserted and locked. The fireproof ceiling structure according to any one of claims 1 to 3 , wherein the wall is provided directly below the beam, and a space is formed between the beam and an upper portion of the wall. A fire-resistant ceiling structure characterized by being made.

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