JP2017223026A - Roof structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a roof structure having fire resistance performance even though having a hole.SOLUTION: A roof structure 100 is mainly constituted by a roof material 140 and an aperture closing member 300. The roof material 140 mainly includes: a folded-plate 150 formed by folding a metallic plate-like member; and a fire resistance member 160 provided on the folded-plate 150's surface directed vertically downwards. The folded-plate 150 mainly includes a roof aperture 154 opening in the thickness direction of the folded-plate 150. The roof aperture 154 is a square hole provided over one apex 151, four back parts 152, and two bottoms 153 of the folded-plate 150. The aperture closing member 300 mainly includes a frame member 310 and lid member 320 that are made from painted molten 55% aluminium-zinc alloy plated steel plate (JIS G 3322) having a thickness of 0.5 mm.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a roof structure having fire resistance while having an opening.

  Business facilities such as stores and lodging facilities may be built under viaducts such as railways and roads. The viaduct is made of concrete, steel, or the like, and thus has many gaps. For this reason, water and dust enter the space under the overpass. In order to prevent these water and dust from entering the inside of the business facility, the business facility includes a roof having a waterproof structure. Such business facilities must have fire resistance as stipulated by the Building Standards Act and other laws and regulations. Therefore, the roof of a business facility has a fireproof structure that satisfies the fire resistance specified by laws and regulations (see Patent Document 1).

JP 2014-051792 A

  Equipment such as air conditioning ducts may be provided on such a roof. When inspecting or replacing such equipment, it is necessary for a person to go up on the roof. The same applies to when checking the viaduct or when checking the steel material connecting the viaduct and the roof. Therefore, in order to allow a person to climb on the roof from inside the facility, it is necessary to make a hole in the roof that is large enough for people to pass. However, simply drilling a hole in the roof may impair fire resistance

  The present invention has been made in view of these problems, and an object of the present invention is to obtain a roof structure having fire resistance while having holes.

  A roof structure according to the present invention includes a roof member having a roof opening penetrating in the thickness direction, and an opening closing member attached to the roof opening, and the roof member and the opening closing member are fireproof against a fire from below. It has the fireproof member which has these.

  The roof structure is a roof structure in which a roof member is suspended from a plurality of housings, and further includes a suspension member having a housing side member fixed to the housing, and the roof member is a member on the opposite side of the housing side member. It may be attached to the roof side member which is.

  A roof structure is a roof structure provided on an existing roof, Comprising: The existing roof is provided with the existing roof opening penetrated in thickness direction, and a roof member may be attached to an existing roof.

  The opening closing member includes a lid member and a frame member. The frame member has a frame opening that opens in the thickness direction thereof, and the roof opening is formed so that at least a part of the frame opening overlaps the roof opening. The attached lid member has a size that covers the frame opening, and is preferably detachably attached to the frame member so as to cover the frame opening.

  The frame opening includes a frame rising portion that extends in the thickness direction of the frame member, and the lid member includes a lid base that is larger than the frame opening and a lid rising portion that extends from the edge of the lid base in the thickness direction of the lid member. The lid member is preferably attached to the frame member so that the lid rising portion covers the frame rising portion.

  It is preferable that the frame member further includes a frame base that extends from the frame opening and contacts the roof member, and the fireproof member is attached so as to cover one side of the frame base and the frame rising portion.

  The lid member includes a lid base larger than the frame opening, and a lid rising portion extending from the edge of the lid base in the thickness direction of the lid member, and the fireproof member is attached so as to cover one side of the lid base and the lid rising portion. It is preferred that

  According to the present invention, a roof structure having fire resistance while having holes is obtained.

It is a longitudinal cross-sectional view of the structure provided with the fireproof roof which concerns on 1st Embodiment which concerns on this invention. It is a perspective view of the fireproof roof of FIG. (A) is a sectional view taken along the line aa in FIG. 2, and (b) is a sectional view taken along the line bb in FIG. It is a longitudinal cross-sectional view of the structure provided with the fireproof roof which concerns on the modification of the embodiment. It is a perspective view explaining the installation method of the fireproof roof which concerns on the modification of the embodiment. It is the schematic which provided the roof structure by 2nd Embodiment under the viaduct. It is the perspective view which looked at the roof structure from the viaduct side. FIG. 8 is a partial cross-sectional view taken along line VIII-VIII in FIG. 7. FIG. 8 is a partial cross-sectional view taken along line IX-IX in FIG. 7. It is a perspective view of the roof structure by 3rd Embodiment provided on the housing. It is a partial cross section figure in the XI-XI line of FIG. It is a partial cross section figure in the XII-XII line | wire of FIG.

  Hereinafter, the first embodiment according to the present invention will be described in detail with reference to a high bridge as an example with reference to FIGS.

(Fireproof roof structure)
First, the structure of the fireproof roof of this embodiment is demonstrated. FIG. 1 is a longitudinal cross-sectional view of a viaduct provided with the fireproof roof 10 of the present embodiment, FIG. 2 is a perspective view of the fireproof roof 10, FIG. 3A is a cross-sectional view taken along line aa in FIG. ) Is a bb cross-sectional view of FIG.
As shown in FIG. 1, the fireproof roof 10 of the present embodiment forms a roof of a building 20 provided in a space below the bridge girder 11 of the viaduct 1 and forms a fireproof section of the building 20.
As shown in FIG. 2, the refractory roof 10 includes a plurality of steel frame bodies 2 supported by the frame 5 of the building 20, a plurality of firewood attachment steel members 3 provided on the lower surface of the steel frame etc. 2, and a wood material attachment. It is comprised with the brazing material 4 etc. which were attached to the lower surface of the steel material 3. FIG.

As shown in FIG. 3, the steel frame etc. 2 includes a steel material 21, a heat insulating material 22 covering the steel material 21, a plurality of bolt portions 23 extending downward from the steel material 21, and the like below the bridge girder 11. In addition, the bolt parts 23 are arranged so as to hang downward and to be parallel to each other at a predetermined interval as shown in FIG. In addition, it is preferable that the installation interval of each steel frame etc. 2 shall be 2000 mm or less.
The heat insulating material 22 has a fire resistance performance of 30 minutes or more.
A plurality of bolt parts 23 are welded to the lower surface of the steel material 21 with the upper ends of all screws along the axial direction of the steel material 21 with the same interval as the installation interval of the brazing material mounting steel material 3.

The brazing material mounting steel material 3 is a member functioning as a purlin of a building, and in addition to the lip groove shape steel shown in FIG. 3, a surface perpendicular to the axis, such as a groove shape steel, an H shape steel, and a Z shape steel. The cross-sectional shape at the time of cutting at a vertical portion 31 extending in the vertical direction, an upper horizontal portion 32 extending horizontally from the upper end of the vertical portion 31, and extending horizontally from the lower end of the vertical portion 31. It has a lower horizontal portion 33. A plurality of upper bolt holes (second bolt holes) are formed in the upper horizontal portion 32 with the same interval as the installation interval of the steel frame etc. 2 along the axial direction. A plurality of lower bolt holes are formed at predetermined intervals along the axial direction.
The brazing material mounting steel material 3 is arranged on the lower surface of the steel frame etc. 2 so as to be orthogonal to the extending direction of the steel frame etc. 2 and parallel to each other as shown in FIG. The bolt part 23 of the steel frame etc. 2 is passed through and the upper surface of the upper horizontal part 32 is fixed to the lower surface of the steel frame etc. 2 with the nut 24. In addition, it is preferable that the installation space | interval of each brazing material attachment steel material 3 shall be 900 mm or less.

As shown in FIG. 3 (b), the brazing material 4 is composed of a folded plate 41 and a backing material 42 that covers the entire lower surface of the folded plate 41. A plurality of holes are formed at predetermined intervals along the extending direction of the top. The brazing material 4 is arranged on the lower surface of the brazing material mounting steel material 3 so as to spread in the horizontal direction, and is fastened with bolts 44 and nuts 45 in a state where the bolt holes are overlapped with the lower bolt holes of the brazing material mounting steel material 3. It has been.
The backing material 42 is a heat insulating material having a fire resistance performance of 30 minutes or more.

[Seismic reinforcement method for ceiling]
Next, a method for installing the above-described fireproof roof 10 in the space below the bridge girder 11 of the viaduct 1 will be described.

First, as a preliminary preparation, each member is prepared in a place (for example, a factory) different from the construction site. As preparation of the steel frame 2 and the like, first, a bolt portion 23 is provided by welding a plurality of all screws at a predetermined interval on a surface of the steel material 21 which is a lower surface when attached to the building 20. And with the heat insulating material 22, the steel material 21 is coat | covered so that the front-end | tip part of the bolt part 23 may protrude outside the heat insulating material 22. FIG.
Bolt holes are made in predetermined locations in the brazing material mounting steel material 3 and the brazing material 4. The brazing material mounting steel material 3 can be manufactured simply by opening up and down bolt holes in a commercially available shape steel or the like.

  After each member is ready, each member is transported to the construction site and attached. First, the receiving bundle 51 (refer FIG. 2) is provided in the predetermined location of the housing 5 of the building 20 so that it may extend toward upper direction. Specifically, the steel material that becomes the receiving bundle 51 is welded to the housing 5. And the both ends of the steel frame etc. 2 are received and fixed to the bundle 51.

After the installation of the steel frame 2 and the like, the brazing material mounting steel 3 is fixed to the steel frame 2 and the like. Specifically, a plurality of upper bolt holes provided in the upper horizontal portion 32 of the brazing material mounting steel material 3 are passed through the bolt portions 23 of each steel frame etc. 2 and the nut 24 is tightened.
After the installation of the brazing material mounting steel material 3, the brazing material 4 is mounted on the brazing material mounting steel material 3. Specifically, the bolt holes provided in the brazing material 4 are overlapped with the lower bolt holes of the brazing material mounting steel material 3, the packing 43 is sandwiched therebetween, the bolts 44 are inserted into the lower bolt holes, and the nut 45 Tighten. Thus, the refractory roof 10 is installed in the space below the bridge girder 11 of the viaduct 1.

Conventionally, after using angle iron, welding the angle steel to the bolt part 23, attaching the sheet stat to the angle steel, attaching a number of sheet stats to the angle steel, Although it was necessary to install the brazing material, welding is not necessary for the installation of the brazing material mounting steel material 3, and it is possible to replace a plurality of sheet stats only by mounting a single member with a bolt hole in advance. Therefore, it is possible to omit the ink marking process and the individual sheet stat mounting process.
Moreover, since the brazing material is bolted directly to the brazing material mounting steel material 3 without using a member fitted and attached to the steel material like a sheet stat, the strength of the roof can be increased.

As mentioned above, although this invention was concretely demonstrated based on embodiment, this invention is not limited to the said embodiment, It can change in the range which does not deviate from the summary.
For example, in the above embodiment, since the lower surface of the steel frame body 2 and the upper surface of the brazing material mounting steel material 3 are brought into contact with each other, the bolt portion 23 is shortened. You may lengthen so that it may suspend and suspend from.
Moreover, in the said embodiment, although the steel frame 2 etc. were used as the structural member of the building 20, when the steel frame as a structural member of a viaduct is arrange | positioned in the space under the bridge girder 11, it is rolled using it. The material mounting steel material 3 may be attached.
Moreover, in the said embodiment, although it was set as the structure which fixes the steel frame 2 etc. only to the frame 5 of the building 20, as shown in FIG. 4, one (upper) end part of the reinforcing steel material 6 is fixed to the viaduct 1. In addition, the refractory roof 10 may be reinforced by fixing the other (lower) end of the reinforcing steel material 6 to the steel frame 2 or the like.
Further, as shown in FIG. 4, a suspended ceiling 7 may be provided below the fireproof roof 10.

  Moreover, in the said embodiment, although the fireproof roof 10 was comprised using the roofing material 4 by which the backing material 42 was provided in the lower surface, the waterproof roof by the steel frame 2 etc., the roofing material attachment steel material 3, and the folding plate 41 has already been carried out. When provided, as shown in FIG. 5, the existing waterproof roof may be made a fireproof roof by sandwiching the backing material 42 from below with a new folded plate 46.

  Next, the roof structure 100 according to the second embodiment will be described with reference to FIGS. The same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  FIG. 6 is a view in which the roof structure 100 is provided under the viaduct 200. In FIG. 6, the structure of the roof structure 100 and the viaduct 200 is simplified for the sake of explanation. The viaduct 200 is mainly composed of a plurality of bridge girders 201, beams 211, and piers 212. The beam 211 supports the bridge girder 201 and the bridge pier 212 extending from the ground supports the beam 211. The joint 203 joins the bridge girders 201 so that the bridge girders 201 can be freely displaced. The bridge girder 201, the beam 211, and the pier 212 are made of concrete. Concrete is permeable to water and joint 203 is permeable to water and dust. Therefore, water and dust enter under the viaduct 200.

  The roof material 140 is suspended from the bottom face 202 of the bridge girder 201 or the beam 211 via the suspension bolt 110. That is, the roof material 140 is suspended from the bridge girder 201 and the beam 211 (bypass frame) located vertically above (upward in the direction of gravity). Details of the roofing material 140 will be described later. The decorative ceiling 222 is suspended from the bottom surface of the roof material 140 via the hanging fitting 221. Since the Building Standard Act does not require the fireproof performance of the decorative ceiling 222, the decorative ceiling 222 does not have the fireproof performance specified by the Building Standard Act.

  An outer wall 223 is provided from the bottom surface 202 of the bridge girder 201 to the floor slab 225, and a fire wall 224 is provided from the roof material 140 to the floor slab 225. The outer wall 223 and the fire wall 224 have waterproof performance and fire resistance performance. The roofing material 140, the outer wall 223, the fire wall 224, and the floor slab 225 form a living room 230, and a business facility is provided inside the living room 230.

  Next, the roof structure 100 will be described in detail with reference to FIG. In FIG. 7, the structure of the roofing material 140 is simplified for the sake of explanation.

  The roof structure 100 mainly includes a suspension bolt 110, an angle steel 120, a sheet stat 130, a roof material 140, and an opening closing member 300. The suspension bolt 110, the angle steel 120, and the seat stat 130 form a suspension member, and the suspension member has a housing side member and a roof material side member. And the suspension bolt 110 comprises a frame side member, and the angle iron 120 and the sheet | seat stat 130 comprise a roof material side member.

  Male screws are cut at both ends of the suspension bolt 110. The suspension bolt 110 is fixed to the bridge girder 201 by screwing the upper end of the suspension bolt 110 into the drive-type anchor driven into the bottom surface 202 of the bridge girder 201. The lower end of the suspension bolt 110 is attached to the angle steel 124 via two nuts 125.

  The angle steel 120 is an equilateral angle steel, and has a shape in which two steel plates (horizontal ribs 121 and vertical ribs 122) having a plate shape of 50 mm in width are joined to each other at right angles on their long sides. The angle steel 124 also has a similar shape. The angle steel 124 is attached to the angle steel 120 via bolts and nuts 123, and the angle steel 120 supports the roof material 140 via the seat stat 130. The suspension bolt 110 suspends the angle steel 120 such that the angle steels 120 adjacent to each other in the width direction face in opposite directions. That is, when the angle steel 120 attached to the suspension bolt 110 is viewed from the longitudinal direction, the horizontal ribs 121 extending in the horizontal direction extend in opposite directions.

  The seat stat 130 mainly includes a fitting portion 131 and a bolt 132. The fitting portion 131 has an opening, and the horizontal rib 121 is sandwiched and fixed in the opening. Since the height of the opening is lower than the thickness of the horizontal rib 121, the seat stat 130 does not shift with respect to the horizontal rib 121 below a predetermined force. The bolt 132 is attached to the mountain portion 151 of the roof material 140. The mountain portion 151 will be described later.

  Since the adjacent angle irons 120 in the width direction face the opposite direction, the opening of the seat stat 130 attached to the adjacent angle steel 120 also faces the opposite direction. Therefore, when the roof material 140 is thermally expanded, the sheet stats 130 attached to the adjacent angle steels 120 are displaced from the angle steels 120 in directions opposite to each other with respect to the horizontal direction. Due to the displacement of the sheet stat 130, the elongation of the roof material 140 due to thermal expansion is absorbed. Thereby, the roofing material 140 is not destroyed.

  Next, the roof material 140 and the opening closing member 300 will be described in detail with reference to FIGS.

  The roof material 140 mainly includes a folded plate 150 formed by bending a metal plate-like member and a refractory member 160 provided on a surface of the folded plate 150 facing vertically downward. The folded plate 150 is made of a galvalume steel plate having a thickness of 0.8 mm, a plurality of top portions 151, a back portion 152 extending obliquely downward from both sides of the top portion 151, a bottom portion 153 extending in parallel to the top portion 151 from the back portion 152, and a folded plate It mainly has a roof opening 154 that opens in the thickness direction of 150.

  The top portion 151, the back portion 152, and the bottom portion 153 are plate-like bodies having a thickness of 0.8 mm. Hereinafter, in FIGS. 7 to 9, the direction along the long sides of the top 151, the back 152, and the bottom 153 (flow direction) is the Y direction, and the directions along the thickness of the top 151 and the bottom 153 are the Z direction, Y direction, and Z A direction (width direction) orthogonal to the direction is referred to as an X direction. The positive Z direction is vertically upward, and the negative Z direction is vertically downward. In the Z direction, all the tops 151 have the same width, and the back 152 and the bottom 153 have the same width.

  The roof opening 154 is a square hole provided across one top 151, four backs 152, and two bottoms 153. The length of the roof opening 154 in the X and Y directions is slightly longer than 600 mm.

  The refractory member 160 is made of a non-combustible material having a thickness of 5 mm including glass fibers, such as Super Felton, or a non-combustible material having a thickness of 4 mm, for example, Funenace, and has a fire resistance against a fire from below vertically. Demonstrate.

  The opening closing member 300 mainly includes a frame member 310 and a lid member 320 made of a paint-melted 55% aluminum-zinc alloy plated steel sheet (JIS G 3322) having a thickness of 0.5 mm.

  Referring to FIGS. 7 to 9, the frame member 310 has a rectangular shape with a length of about 800 mm in the X direction and a length of 1100 mm in the Y direction when viewed from the Z direction. A frame opening 314 that is open to the frame and a frame base 316 that extends from the frame opening 314 and contacts the folded plate 150 are mainly provided.

  The frame opening 314 is provided in the approximate center of the frame member 310 in the X direction and the Y direction, and forms a square cylinder having a length of about 600 mm in the X direction and the Y direction and a length of about 50 mm in the Z direction. The frame opening 314 includes a frame rising portion 315 that forms a cylindrical side surface. The frame rising portion 315 extends from the edge of the frame base portion 316 so as to be perpendicular to the thickness direction of the frame member 310, in other words, the Z direction, or in other words, to the frame base portion 316. In the frame rising portion 315, the end opposite to the end connected to the frame base 316 is parallel to the frame base 316, that is, in a direction parallel to the X direction and the Y direction, in other words, with respect to the frame rising portion 315. It is bent in a direction that forms a right angle to form a flange 317.

  Referring to FIGS. 7 and 8, the frame base 316 includes a skirt 318 that is bent at a predetermined angle vertically downward. The predetermined angle is substantially the same as the angle formed by the top portion 151 and the back portion 152.

  A refractory member 319 is attached to a surface of the frame base portion 316 that faces vertically downward, a cylindrical inner surface of the frame rising portion 315, and a surface of the flange 317 that faces vertically upward. These planes are on the indoor side of the business facility.

  When viewed from the Z direction, the lid member 320 forms a square having four sides of the same length of 645 mm in the X direction and the Y direction, and has a rectangular parallelepiped lid base 321 and an edge of the lid base 321, that is, the lid base 321. A lid rising portion 322 mainly extending in the thickness direction of the lid member 320, that is, the Z-axis direction, is mainly provided from a plane parallel to the Z-axis. When viewed from the Z-axis direction, the lid base 321 is larger than the frame opening 314. A handle 323 is attached to the surface of the lid base 321 in the approximate center in the X direction and Y direction and directed downward in the vertical direction using bolts and nuts 324. A refractory member 328 is attached to the surface of the lid base portion 321 facing downward in the vertical direction and the inner peripheral surface of the lid rising portion 322. These planes are on the indoor side of the business facility.

  Next, a state in which the opening closing member 300 is attached to the roof material 140 will be described with reference to FIGS. Referring to FIG. 7, the frame member 310 is provided across one top portion 151, four back portions 152, and two bottom portions 153.

  A part of the frame base 316 is in close contact with the top 151, and the skirt 318 is in close contact with the back 152. The two skirts 318 that extend along the Y direction and are symmetrical with respect to the YZ plane are in close contact with the two back portions 152 that are symmetrical with respect to the YZ plane, so that the frame member 310 moves in the X axis direction. There is no.

  A part of the frame base portion 316 and the top portion 151 are fixed to each other using the sheet stat 130 and also fixed to the angle steel 120. Then, the lid member 320 is placed on the frame member 310 so that the lid base portion 321 and the inner peripheral surface of the lid rising portion 322 are in close contact with the flange 317. In this state, the refractory member 160 attached to the roof material 140, the refractory member 319 attached to the frame member 310, and the refractory member 328 attached to the lid member 320 are continuous with each other on the indoor side of the business facility. The refractory member is not interrupted. Thereby, the fireproof performance of the roof material 140 and the opening obstruction | occlusion member 300 is ensured.

  An operator can grasp the handle 323 to remove the lid member 320 from the frame member 310 and move it onto the roof material 140 through the frame opening 314. Further, the handle 323 is gripped, the lid member 320 is attached to the frame member 310, and the frame opening 314 is closed, thereby ensuring the fire resistance performance of the roof material 140 and the opening closing member 300.

  According to the present embodiment, a person can easily enter the roof of a fireproof structure constructed under the viaduct 200 such as a railway or a road. Thereby, it is possible to easily inspect, maintain, and repair the roof, the equipment provided on the roof, or the viaduct 200 while ensuring the fireproof structure of the roof.

  Moreover, since the roof structure 100 has waterproof performance and fireproof performance, it is possible to take measures against water leakage and fire by simply suspending the roof structure 100. Therefore, other waterproof and fireproof construction is not required.

  By providing the expansion 190, the roof structure 100 can be provided under the plurality of bridge girders 201.

  The angle steel 120 may be an unequal angle angle steel instead of an equal angle angle steel, or a shape steel having another shape such as H steel.

  Moreover, the angle steel 120 may not be welded to the suspension bolt 110 but may be fixed by a hardware.

  The material constituting the folded plate 150, the cap 180, and the expansion 190 is not limited to a galvalume steel plate having a thickness of 0.8 mm, and may be a galvalume steel plate having a thickness of 0.8 mm or more. This ensures fire resistance as stipulated in the Building Standard Law. Further, instead of a 0.8 mm thick galvalume steel plate, a material having fire resistance defined in the Building Standards Act may be used.

  The fire-resistant member 160 is not limited to the above-described one, and may be a material having fire-resistant performance as defined by the Building Standard Law and other laws and regulations, and may be provided on the indoor side surface of the folded plate 150.

  Note that the expansion 190 may not be provided when the number of viaducts is one.

  The bridge girder 201, the beam 211, and the pier 212 may be made of steel or the like instead of concrete.

  Next, the roof structure 400 according to the third embodiment will be described with reference to FIGS. The same components as those in the first and second embodiments are denoted by the same reference numerals and description thereof is omitted.

  FIGS. 10 to 12 are views in which a roof structure 400 is provided on an existing roof 510 attached to a main purlin 500. FIG. In FIG. 10, the casing is omitted.

  The existing roof 510 is mainly composed of a tight frame 520 and an existing folded plate 530. The tight frame 520 is formed by bending a metal plate-like member into a corrugated shape, and its bottom surface is fixed to the purlin 500. The existing folded plate 530 is formed by bending a metal plate-like member into a corrugated shape, and includes a plurality of top portions 531, a back portion 532 extending obliquely downward from both sides of the top portion 531, and a bottom portion 533 extending from the back portion 532 in parallel with the top portion 531. And a second roof opening 534 that opens in the thickness direction of the existing folded plate 530 and is fixed to the tight frame 520 with bolts 523. The 2nd roof opening 534 is a square hole provided ranging over the two top parts 531, the four back parts 532, and the three bottom parts 533 (refer FIG. 12). The length of the roof opening 154 in the X and Y directions is slightly longer than 600 mm.

  The roof structure 400 mainly includes a goby-type folded plate 410, a first heat insulating fitting 420, a second heat insulating fitting 430, an accessory 440, a fireproof member 450, and an opening closing member 800.

  The goby folding plate 410 is a folded plate formed by bending a metal plate-like member into a corrugated shape. The goby folding plate 410 is made of a 0.8 mm thick Galvalume steel plate, and includes a plurality of top portions 411, a back portion 412 extending obliquely downward from both sides of the top portion 411, and a bottom portion 413 extending from the back portion 412 in parallel with the top portion 411, It mainly has a first roof opening 414 that opens in the thickness direction of the goby folding plate 410. The top part 411, the back part 412, and the bottom part 423 are plate-like bodies having a thickness of 0.8 mm. The length between the centers of the two top portions 411, that is, the working width of the goby folding plate 410 is, for example, 455 to 550 mm. Moreover, the height of the back part 412 is 66 mm to 173 mm, for example. The cross section of the goby folding plate 410, that is, the cross section in the width direction of the goby folding plate 410 is substantially the same shape as the cross section of the existing folding plate 530 (see FIG. 12).

  Referring to FIGS. 11 and 12, the first roof opening 414 is a square hole having a size similar to the second roof opening 514, with two tops 411, four backs 412 and three bottoms. 413 is provided across 413. The length of the roof opening 414 in the X and Y directions is slightly longer than 600 mm.

  The refractory member 450 is made of a matte incombustible material having a thickness of 5 mm including glass fiber, such as Super Felton, or a matte incombustible material having a thickness of 4 mm, for example, Funenace, and is a surface facing the vertically lower side of the goby folding plate 410. And the surface of the existing folded plate 530 that faces vertically upward, and exhibits fire resistance against a fire from vertically below.

  Hereinafter, in FIGS. 10 to 12, the direction along the long sides of the top portion 411, the back portion 412, and the bottom portion 413 (flow direction) is the Y direction, and the direction along the thickness of the top portion 411 and the bottom portion 413 is the Z direction, Y direction, and Z A direction (width direction) orthogonal to the direction is referred to as an X direction. The positive Z direction is vertically upward, and the negative Z direction is vertically downward. In the Z direction, the widths of all the top portions 411 are equal, and the widths of the back portion 412 and the bottom portion 413 are the same.

  The first heat-insulating metal fitting 420 mainly includes a rectangular cylindrical first base portion 421 and a first fixing portion 422 extending obliquely downward from the bottom surface of the first base portion 421. The first fixing portion 422 is fixed to the back portion 532 of the existing folded plate 530 by a tapping screw 423. The bottom surface of the first base 421 is provided with a hole penetrating in the thickness direction of the bottom surface, and the bolt 523 penetrates the hole. Accordingly, the bottom surface of the first base portion 421 and the first fixing portion 422 are in close contact with the top portion 531 and the back portion 532 of the existing folded plate 530, respectively. An accessory 440 is fixed to the top surface of the first base portion 421 by a tapping screw 441. The accessory 440 includes an inverted L-shaped protrusion 442 that protrudes upward. A goblet of the goby folding plate 410 is fastened to the protrusion 442, whereby the goby folding plate 410 is fixed to the first heat insulating fitting 420.

  The second heat-insulating metal fitting 430 includes a rectangular cylindrical second base portion 431, a second fixing portion 432 extending obliquely downward from the bottom surface of the second base portion 431, and an obliquely downward direction from the top surface of the second base portion 431. And a third fixing portion 433 extending in the direction. The second fixing portion 432 is fixed to the back portion 532 of the existing folded plate 530 by a tapping screw 434. The bottom surface of the second base 431 is provided with a hole penetrating in the thickness direction of the bottom surface, and the bolt 523 penetrates the hole. As a result, the bottom surface of the second base portion 431 and the second fixing portion 432 are in close contact with the top portion 531 and the back portion 532 of the existing folded plate 530, respectively. On the top surfaces of the second base portion 431 and the third fixing portion 433, a goby of the goby type folded plate 410 is fastened, whereby the goat type folded plate 410 is fixed to the second heat insulating metal fitting 430.

  The opening blocking member 800 mainly includes a frame member 810 and a lid member 820 made of a paint-melted 55% aluminum-zinc alloy plated steel sheet (JIS G 3322) having a thickness of 0.5 mm.

  Referring to FIGS. 10 to 12, the frame member 810 is a rectangle having a length of about 800 mm in the X direction and a length of 1100 mm in the Y direction when viewed from the Z direction. A frame opening 814 that opens to the center of the frame, and a frame base 816 that extends from the frame opening 814 and contacts the goby type folded plate 410.

  The frame opening 814 is provided in the approximate center of the frame member 810 in the X direction and the Y direction, and forms a square cylinder having a length of about 600 mm in the X direction and the Y direction and a length of about 50 mm in the Z direction. The frame opening 814 includes a frame rising portion 815 that forms a cylindrical side surface. The frame rising portion 815 extends from the edge of the frame base portion 816 so as to be perpendicular to the thickness direction of the frame member 810, in other words, the Z direction, or in other words, to the frame base portion 816. In the frame rising portion 815, the end opposite to the end connected to the frame base 816 is parallel to the frame base 816, that is, in a direction parallel to the X direction and the Y direction, in other words, with respect to the frame rising portion 815. It is bent in a direction that forms a right angle to form a flange 817.

  Referring to FIGS. 10 and 12, the frame base 816 includes a skirt 818 that is bent at a predetermined angle vertically downward. The predetermined angle is substantially the same as the angle formed by the top portion 411 and the back portion 412. A refractory member 819 is affixed to the vertically downward surface of the frame base 816, the cylindrical inner surface of the frame rising portion 815, and the vertically upward surface of the flange 817. These planes are on the indoor side of the business facility.

  The lid member 820 has a square shape with four sides having the same length of 645 mm in the X direction and the Y direction when viewed from the Z direction, and has a rectangular parallelepiped lid base portion 821 and an edge of the lid base portion 821, that is, the lid base portion 821. It mainly includes a lid rising portion 822 extending in the thickness direction of the lid member 820, that is, the Z-axis direction, from a plane parallel to the Z-axis. When viewed from the Z-axis direction, the lid base 821 is larger than the frame opening 814. A handle 823 is attached using bolts and nuts 824 to the surface of the lid base 821 that is substantially the center in the X direction and the Y direction and faces upward in the vertical direction. A fireproof member 828 is attached to the surface of the lid base portion 821 that faces vertically downward and the inner peripheral surface of the lid rising portion 822. These planes are on the indoor side of the business facility.

  Next, a state where the opening closing member 400 is attached on the existing roof 510 will be described with reference to FIGS. Referring to FIG. 10, the frame member 410 is provided across four top portions 411, eight back portions 412, and three bottom portions 413.

  A part of the frame base portion 816 contacts the protrusion 442 and the back portion 412, and the skirt 818 closely adheres along the back portion 412. The two skirts 818 that extend along the Y direction and are symmetrical with respect to the YZ plane are in close contact with the two back portions 412 that are symmetrical with respect to the YZ plane, so that the frame member 410 moves in the X axis direction. There is no. Skirt 818 is secured to back 412 using tapping screws 825.

  A part of the frame base 816 and the top 411 are fixed to each other using the sheet stat 130 and also fixed to the angle steel 120. Then, the lid member 820 is placed on the frame member 810 so that the lid base portion 821 and the inner peripheral surface of the lid rising portion 822 are in close contact with the flange 817. In this state, the fire-resistant member 450 provided between the existing folded plate 530 and the goby-type folded plate 410, the fire-resistant member 819 attached to the frame member 810, and the fire-resistant member 828 attached to the lid member 820 are mutually connected. Continuously, the fireproof member is not interrupted on the indoor side of the business facility. Thereby, the fireproof performance of the roof structure 400 is ensured.

  The operator can grasp the handle 823, remove the lid member 820 from the frame member 810, and move it under the roof structure 400 through the frame opening 814. In addition, the handle 823 is gripped, the lid member 820 is attached to the frame member 810, and the frame opening 814 is closed, thereby ensuring the fire resistance of the roof structure 400.

  According to this embodiment, a person can easily enter the existing roof 510 from the outside, and a fireproof structure can be added to the roof of the existing building. Furthermore, the equipment provided between the roof of the existing roof 510 and the housing can be easily inspected, maintained, and repaired.

  In addition, although the structure which provides the roof structure 400 on the existing roof 510 was demonstrated, you may attach the goby type folded board 410 directly to the tight frame 520 instead of on the existing roof 510. FIG. In this case, the refractory member 450 is attached to the indoor side of the goby folding plate 410.

  In the Z direction, the widths of all the top portions 531 may not be equal, and the same applies to the back portion 532, the bottom portion 533, the top portion 411, the back portion 412, and the bottom portion 413.

  The first roof opening 414 and the second roof opening 534 may not be square holes, but may be holes having a shape formed by other rectangles, straight lines, or curves.

  The thickness of the galvalume steel sheet is not limited to 0.8 mm, and may preferably be 0.4 mm to 0.8 mm, or another value.

  The fire-resistant member 450 is not limited to the above-mentioned ones, and may be a material having fire-resistant performance as defined by the Building Standards Act and other laws and regulations, and may be provided on the indoor side surface of the goby folding plate 410. .

  Note that the roof structure 400 has been described as including the goby type folded plate 410, but the goat type folded plate 410 may be a folded plate without gobe. In this case, the 2nd heat insulation metal fitting 430 is used instead of the 1st heat insulation metal fitting 420 and the accessory 440. FIG.

  In addition, although the square goby etc. were used for the goby type folding plate 410 shown in FIGS. 10 and 12 as an example, other gozes such as a round goby may be used.

  In any embodiment, the presented values and shapes are examples, and other values and shapes may be taken.

DESCRIPTION OF SYMBOLS 1 Viaduct 2 Steel frame etc. 3 Steel material attachment steel material 4 Steel material 5 Steel frame 6 Reinforcement steel material 7 Suspended ceiling 10 Fireproof roof 11 Bridge girder 12 Beam 13 Pillar 20 Building 21 Steel material 22 Heat insulating material 23 Bolt part 24 Nut 31 Vertical part 32 Top horizontal Part 33 Lower horizontal part 41 Folding plate 42 Backing material 43 Packing 44 Bolt 45 Nut 46 Folding plate 51 Receptacle 140 Roofing material 150 Folding plate 160 Fireproof member 300 Opening closing member 310 Frame member 319 Fireproof member 320 Cover member 328 Fireproof member

Claims (7)

A roof member comprising a roof opening penetrating in the thickness direction;
An opening closing member attached to the roof opening,
The said roof member and the said opening obstruction | occlusion member are roof structures provided with the fireproof member which has fire resistance with respect to the fire from the downward direction. A roof structure in which roof members are suspended from a plurality of housings,
A suspension member having a housing side member fixed to the housing;
The roof structure according to claim 1, wherein the roof member is attached to a roof side member that is a member on the opposite side of the housing side member. A roof structure provided on an existing roof,
The existing roof includes an existing roof opening penetrating in the thickness direction,
The roof structure according to claim 1, wherein the roof member is attached to the existing roof.   The opening closing member includes a lid member and a frame member, and the frame member has a frame opening that opens in a thickness direction thereof, so that at least a part of the frame opening overlaps the roof opening. The said cover member is attached to the said roof opening, The said cover member has a magnitude | size which covers the said frame opening part, and is attached to the said frame member so that attachment or detachment is possible so that the said frame opening part may be covered. Roof structure.   The frame opening includes a frame rising portion extending in a thickness direction of the frame member, and the lid member has a lid base larger than the frame opening and a thickness direction of the lid member from an edge of the lid base. The roof structure according to claim 4, further comprising a lid rising portion extending to the frame member, wherein the lid member is attached to the frame member so that the lid rising portion covers the frame rising portion.   The said frame member is further provided with the frame base part which extends from the said frame opening part, and contacts the said roof member, The said fireproof member is attached so that the single side | surface of the said frame base part and the said frame rising part may be covered. The roof structure as described in. The lid member includes a lid base that is larger than the frame opening, and a lid rising portion that extends from an edge of the lid base in the thickness direction of the lid member, and the fire-resistant member includes the lid base and the lid rising portion. The roof structure according to claim 4, which is attached so as to cover one side of the roof.

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