JP2631008B2 - Fire-resistant base structure for horizontal roof - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a fireproof foundation structure for a horizontal roof of a general building structure.

More specifically, the present invention relates to an improvement in a fire-resistant base structure using a fire-resistant board in a horizontal-roofed roof applied as a so-called 30-minute fire-resistant structure base material.

[Conventional technology]

Rigid fire-resistant boards used for this type of roof base material include:
For example, a hard wood chip cement board or the like formed into a flat plate having a predetermined thickness using cement or the like as a main material is known to have a sufficient fire resistance or the like conforming to a fire resistance structural standard for 30 minutes.

FIGS. 8 (a), (b) and FIGS. 9 (a), 9 (a), 9 (a) and 9 (a) show the conventional fire-resistant foundation structure of a horizontal roofing roof using this hard wood chip cement board as a fire-resistant board of a roof fire-resistant foundation structure.
(B).

FIGS. 8 (a) and 8 (b) are partially enlarged cross-sectional views of the main structure of the fire-resistant base structure, and FIGS. 9 (a) and 9 (b) are detailed cross-sectional views showing a fixing portion to the fire-resistant board and fire resistance. FIG. 3 is a partial sectional view showing only a board taken out.

In FIG. 8 (a), reference numeral (1) denotes purlin members arranged at a predetermined interval on the roof assembly side, and (2) denotes a mounting flange portion (2a) on one lower side, and the mounting flange portion. Web part (2b) raised from (2a), and upper support flange part (2c) obtained by bending this web part (2b) to the other side
(3) is each fireproof board using a hard wood chip cement board, (4) is each hanger member, and (5) is each horizontal roofing shingle member.

In the case of this conventional roofing structure,
The mounting flange portions (2a) of the respective rafter members (2) are mounted on the purlin members (1) at predetermined intervals by a fastening tool (6) such as a set screw.

Next, one side edge (3a) of each fireproof board (3) is inserted between each purlin member (1) and the upper support flange portion (2c) of each rafter member (2), and the mounting flange is mounted. After pressing the other side edge (3b) on the part (2a), it is fastened with a fastening tool (7) such as a screw stopped from the upper support flange (2c) side, and then attached. Similarly, each hanging member (4) fixed to the upper support flange portion (2c) of each rafter member (2) is fastened by a fastening tool (7) such as a set screw. Make sure to attach it.

After that, each of the horizontal roof members (5) is laid up as expected using the respective suspension members (4).

FIG. 8 (b) shows that, in addition to the configuration of FIG. 8 (a), a lower support flange portion (2 d) is formed on the other lower side of each of the hanging members (2), and an upper support flange portion (2 Insert one side edge (3a) of each refractory board (3) between 2c) and the lower support flange (2d), and fasten it with a fastener (7) such as a set screw. It is made to be attached.

In the case of each of these conventional fireproof base structures, each fireproof board (3) mounted between adjacent rafter members (2) is connected to the upper support flange portion (2c) of each rafter member (2). It is fastened from the side by a fastening device (7) such as a stop screw directly or via a suspension member (4).

[Problems to be solved by the invention]

However, in the refractory foundation structure using the hard wood chip board as described above, the hard wood cement board as the fire board has sufficient fire resistance in conformity with the fire resistance structure standard for 30 minutes. However, the use of cement or the like has the disadvantage of lacking caking properties and being brittle.

That is, as shown in FIGS. 9 (a) and 9 (b), the fireproof board (3) lacking in adhesiveness has a poor fastening performance with the fastener (7), and furthermore, is subject to aging. The accompanying withering phenomenon is also added, and the fixing action tends to be further deteriorated.

In addition, because of the brittleness, at the time of fastening with the fastening device (7), the defective portion (8
a) and (8b) are liable to occur, and in some cases, may be damaged by cracks from the fastening part. The broken main material fine particles may be scattered around and the stable holding of the fireproof board (3). There was a problem that it could not be done.

Therefore, there are many problems such as the possibility that the fireproof board (3) may come off from the ground surface when the roof surface of the shingled roof is hit by a gust or the like.

The present invention is intended to solve such a conventional problem. When a fire-resistant board such as a hard wood cement board is used for a fire-resistant base, the mounting and holding of the fire-resistant board is performed by a fastener such as a screw. It is an object of the present invention to provide a fire-resistant foundation structure for a horizontally-roofed roof, which can be performed without depending on the roofing material and can prevent breakage of a fire-resistant board due to fixing of a roofing material.

[Means for solving the problem]

In order to achieve the above object, a fireproof foundation structure in a horizontal-roofed roof according to the present invention includes: each purlin member arranged at a predetermined interval; and each rafter member fixed at a predetermined interval across each purlin member. And, a fire-resistant board mounted between the rafter members, and each hanger member is fixedly fastened on each rafter member at a predetermined interval, and holds and locks each horizontal roofing shingle member,
In the rafter member, a lower side mounting flange portion to be fixed to the purlin member, a lower side other side lower supporting flange portion,
An upper support flange on the other side of the upper side is provided by bending a web portion raised from the mounting flange portion by an amount equivalent to the thickness of the fireproof board and an end of the web portion so as to face the lower support flange portion, The fireproof board is held between the upper support flange portions or on the mounting flange portion, and the respective side edges are brought into contact with the web portion, and the predetermined fastening positions on the upper support flange portion upper surface. Each time, a pair of a swelling locking portion having a locking opening opened above the upper surface of the upper support flange portion and a locking piece opposed to the locking opening is formed, respectively. The member has at least a locking tongue piece that is inserted into the locking portion protruding from the locking opening and is locked to the lower surface of the substrate, and a locking recess locked by the locking piece. It is characterized by That.

Also, the end of the locking tongue formed on the substrate of the suspension member is slightly protruded from the lower surface of the substrate.

[Action]

That is, in the present invention, each rafter member is fixed on each purlin member on the roof assembly side, each fireproof board is mounted between these rafter members, and each hook is mounted on each rafter member. In the fireproof base structure by fastening of the members, one side edge of the fireproof board is inserted between the lower support flange portion and the upper support flange portion of one adjacent rafter member so as to contact the web portion. Each fireproof board can be mounted and held simply by placing the other side edge portion of the fireproof board on the mounting flange portion of the other rafter member while pressing the other side edge against the web portion.

In addition, regarding fastening of each suspension member to each rafter member,
This can be performed simply by inserting the locking tongue into the bulging locking member through the locking opening and locking the locking recess with the locking tongue.

At this time, the locking opening of the bulging locking portion opens above the upper surface of the upper support flange portion, and the locking tongue inserted into the bulging locking portion from the locking opening matches the lower surface of the substrate. So
The locking tongue is locked at substantially the same level as the upper surface of the upper support flange in the bulging locking portion.

Therefore, there is no possibility of causing excessive stress on each fireproof board on which the end surface of the locking tongue is mounted, and the inherent durability and strength of the fireproof board can be sufficiently maintained.

When the end surface of the locking tongue is slightly protruded from the lower surface of the substrate, the end surface protrudes from the lower surface of the upper support flange portion, and the protruding portion further presses and holds the refractory board. It can be done firmly.

〔Example〕

Hereinafter, an embodiment of a fireproof base structure in a horizontal roof according to the present invention will be described in detail with reference to FIGS. 1 to 6. FIG.

FIG. 1 is a partially cutaway perspective view schematically showing a schematic structure of a fireproof base structure of a horizontal-roofed roof according to an embodiment of the present invention, and FIG. FIG. 3 is a longitudinal sectional view, FIG. 3 is a transverse sectional view of the same, FIG. 4 is an exploded perspective view showing a combination mode of the rafter member and the suspender member, and FIG. FIGS. 6 (a) and 6 (b) and FIGS. 7 (a) and 7 (b) each show an enlarged view of a main part configuration of a fireproof base structure of a horizontal-roofed roof to which another embodiment is applied. It is a cross-sectional view and a perspective view which takes out and shows the same suspender member.

In the embodiment shown in FIGS. 1 to 4, reference numeral (11) denotes a purlin member using a C-type channel steel material or the like which is arranged at predetermined intervals in parallel with the ridge direction on the roof assembly side, (21) ) Is a rafter member straddled between the respective purlin members (11) and fixed at predetermined intervals along the roof gradient direction, and (31) is mounted and held between the respective rafter members (21). (41) is a hook member fixed on each of these rafter members (21) at predetermined intervals, and (51) is a hanger member (41) on each rafter member (21). Thus, the roofing members are horizontal roofing shingles which are respectively stopped and locked and engaged with each other.

Each of the rafter members (21) includes a lower mounting flange portion (22), a lower supporting flange portion (23) obtained by folding the mounting flange portion (22) at one side, and a lower supporting flange portion (23). A web portion (24) having an end vertically raised by an amount corresponding to the thickness of the fireproof board (31), and an end of the web portion (24) facing the lower support flange portion (23). It is formed from a bent upper supporting flange portion (25).

At the position corresponding to the fastening of each of the suspension members (41) on the upper surface of the upper support flange portion (25), the upper portion corresponding to the ridge side faces downward and is above the upper support flange portion (25) upper surface. Bulging locking portion (26) having a locking opening (27) opening in the opening
And a locking piece (28) facing the locking opening (27) is cut and raised on the lower side corresponding to the eaves side to form a set of locking portions.

Each of these rafter members (21) has a lower mounting flange (22) on the purlin member (11), for example,
By using a fastener (61) in which the part of the head (61a) exposed on the front side is made as thin and flat as possible, it is fastened in a predetermined manner.

Further, as the fireproof board (31), a hard wood chip cement board or the like conforming to the fireproof structure standard for 30 minutes is used as described above, and one of the rafter members (21) is provided between the adjacent rafter members (21). 21) is inserted between the lower support flange portion (23) and the upper support flange portion (25) such that one side edge (31a) comes into contact with the web portion (24), and the other rafter member ( 21) On the other side edge (31) on the mounting flange (22)
b) is pressed against the web part (24) so as to be in contact with the web part (24), and it is attached and held. It is.

Further, each of the hanging members (41) is applied to a horizontal-roofed roof structure or the like that is laid from the ridge side to the eaves side,
The locking recess (43) is cut into the lower part corresponding side of the substrate (42), and the locking tongue piece (44) is cut and raised in the upper part corresponding side, and the rising part ( 45), a support portion (46) from the rising portion (45) to the lower side, and an engaging portion (47) at the end of the support portion (46) are formed by bending each.

The end surface of the locking tongue (44) is made to coincide with at least the lower surface of the substrate (42) or slightly protruded from the lower surface. A locking tongue piece (44) is inserted into a swelling locking portion (26) from a locking opening (27) at a predetermined position on each rafter member (21). Is locked by folding the locking piece (28) and fixed to each other, thereby forming the intended fireproof base structure.

And about each said roofing shingle member (51),
With respect to the supporting portion (46) and the engaging portion (47) of each suspension member (41) fixed at each predetermined position on each of the rafter members (21), a horizontal roofing roof plate from the ridge side to the upper stage side. Once the eave-side engaging portion (52) of the member (51) is once engaged, the ridge-side engaging portion (53) of the horizontal roofing shingle member (51) from the eave side to the lower stage is further engaged. Thereafter, the above is repeated to roof the horizontal roof structure.

As described above, fastening of each rafter member (21) on each purlin member (11) on the roof assembly side, mounting and holding of each fireproof board (31) between each rafter member (21), and each rafter member (21) In the fire-resistant foundation structure of the horizontal roof that is constructed by fastening each of the hanging members (41) above, one of the rafter members (2
1) Between the lower support flange portion (23) and the upper support flange portion (25), simply insert one side edge (31a) of the fireproof board (31) so as to abut the web portion (24), The other side edge (31b) is pressed on the mounting flange (22) of the other rafter member (21) so that the other side edge (31b) comes into contact with the web (24). The fire-resistant board (31) can be mounted and held as specified.

The mounting and holding of each fireproof board (31) does not require any fastening means such as nailing or screwing to the rafter member (21) or purlin member (11).

Further, as shown in FIG. 2, with respect to the fastening of the respective hanging members (41) of the respective rafter members (21), the end surfaces of the locking tongues (44) are made to coincide with at least the lower surface of the substrate, and The locking opening (2) of the bulging locking part (26) for inserting the locking tongue (44)
Since 7) is open above the upper surface of the upper support flange, a part of the locking tongue (44) also projects to the upper surface of each fireproof board (31), which is the lower surface of the upper support flange (25). Since it is not performed, there is no possibility that an unreasonable stress is generated until each of the refractory boards (31) is broken.

Further, when the end surface of the locking tongue piece (44) is slightly protruded from the lower surface of the substrate, the protruding portion can more effectively press the refractory boards (31).

And consequently, from the above points, each fireproof board (31)
Can be properly maintained for a long period of time, and even when each of the shingled roofing shingle members (51) is exposed to a gust of wind, etc. It is possible to prevent each fireproof board (31) from being displaced from the mounting position or from being unable to be stably mounted due to the presence of partially missing fine particles.

Furthermore, the mounting flange portion (22) of each rafter member (21),
Since each of the lower support flange portion (23) and the upper support flange portion (25) is formed in a series along the roof slope, the seam portion of each rafter member (21) is not necessarily connected to each purlin member (11 ) Is no longer necessary. For this reason, each of the rafter members (21) can be mounted and held in an arbitrary manner irrespective of the arrangement interval of each purlin member (11).

On the other hand, the suspender member (41a) shown in FIG. 5 is applied to a horizontal roof structure in which a horizontal roof plate member is roofed from an eaves side to a ridge side.

The suspender member (41a) cuts a locking recess (43a) on a side corresponding to a lower portion of the substrate (42a), cuts and raises a locking tongue piece (44a) on a side corresponding to an upper portion, and raises the locking tongue piece (44a) on the upper side. The upper part (45a) and the engaging part (47a) at the lower end of the upper part are formed by bending each.

The locking tongue piece (44a) is formed so that its end face is at least coincident with the lower surface of the substrate (42a) or slightly protrudes from the lower surface.

In the case of each of these suspension members (41a), the locking opening (2
The rafter member (21) is arranged so that the positions of the locking piece (28) and the locking piece (28) are opposite to those of the above-described embodiment, and the locking tongue piece (44a) is provided at a predetermined position on the rafter member (21). Is inserted into the bulging locking portion (26) from the locking opening (27), and the locking concave portion (43a) is locked and locked by folding the locking piece (28). A fireproof base structure is constructed as follows.

Then, the suspension member (41a) engages the ridge-side engaging portion (53a) of the horizontal roofing shingle member (51a) from the eave side to the lower portion of the anchoring portion (47a). This ridge side engaging part (53
In (a), the eave-side engaging portion (52a) of the roofing roof member (51a) on the upper tier from the ridge side is further engaged, and the horizontal roofing structure is roofed. You can play.

Next, FIGS. 6 (a) and (b) and FIGS. 7 (a) and
The configuration shown in (b) is another different embodiment for rafter members.

That is, the rafter members (2
1) are the lower left and right mounting flanges (122) and the lower support flanges (123) and their respective flanges (12
2) A double web (124) with the opposite ends of (123) raised vertically, and the end of this web (124) is bent toward the lower support flange (123). And an upper support flange (125). And
As in FIG. 4, the upper surface of the upper support flange portion (125) has a locking opening (127) that faces downward and that opens upward from the upper surface of the upper support flange portion (125). 126) and the locking piece (128) are formed respectively.

Also, rafter members (221) according to FIGS. 7 (a) and 7 (b)
Is a mounting flange portion (222) and a lower supporting flange portion (223) distributed to the left and right at an appropriate interval at a lower portion, a web portion (224) which is vertically raised, and a web portion (224). The upper support flange (225) has an end bent toward the lower support flange (223), and the upper end of the upper support flange (225) is connected to the upper support flange (225) in the same manner as described above. And a swelling locking portion (226) and a locking piece (22) having a locking opening (227) facing downward and above the upper surface of the upper support flange portion (225).
8) is formed for each.

In each of these embodiments, the same operation and effect as those of the previous example can be obtained, and each rafter member (121), (221) can be obtained.
Can be further stabilized.

In each of the embodiments, the case where the combination of the rafter member and the suspension member using the fireproof board is mounted on the purlin member as the purlin assembly surface has been described.
For example, even if the roof assembling side is, for example, a concrete slab surface, the same operation and effect can be obtained here.

〔The invention's effect〕

As described above in detail, according to the present invention, each rafter member is fixed onto each purlin member on the roof assembly side, each fireproof board is mounted between these rafter members, and each rafter member is mounted on each rafter member. One side edge of the fireproof board abuts on the web between the lower and upper support flanges of one of the rafter members adjacent to each other in the fireproof base structure by fastening each of the suspension members to the web. Each fireproof board can be mounted and held simply by inserting it so as to make it fit, and pressing and placing the other side edge of the fireproof board on the mounting flange portion of the other rafter member while contacting the other side edge portion with the web portion. .

In addition, regarding fastening of each suspension member to each rafter member,
This can be achieved simply by inserting the locking tongue into the bulging locking portion through the locking opening and locking the locking recess with the locking tongue.

Therefore, a series of operations from laying of the fireproof board to each rafter member to mounting of the suspension member to each rafter member can be performed without using fasteners such as screws. Does not damage the fireproof board.

At this time, the locking opening of the bulging locking portion opens above the upper surface of the upper support flange portion, and the locking tongue inserted into the bulging locking portion from the locking opening matches the lower surface of the substrate. So
The locking tongue is locked at substantially the same level as the upper surface of the upper support flange in the bulging locking portion.

Therefore, there is no possibility of causing excessive stress on each fireproof board on which the end surface of the locking tongue is mounted, and the inherent durability and strength of the fireproof board can be sufficiently maintained.

When the end surface of the locking tongue is slightly protruded from the lower surface of the substrate, the end surface protrudes from the lower surface of the upper support flange portion, and the protruding portion further presses and holds the refractory board. It can be done firmly. As a result, the mounting state of each fireproof board can be maintained well for a long period of time, and there is no fear that stable mounting cannot be performed due to withering or thinning as in the conventional case. be able to.

Further, the apparatus has excellent features such that the overall configuration of the apparatus is relatively simple and can be provided easily and at low cost.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a schematic structure of a fireproof base structure of a horizontal-roofed roof according to an embodiment of the present invention, with a part thereof being cut away, and FIG. FIG. 3 is an exploded perspective view showing a combination mode of the rafter member and the suspension member, FIG. 5 is a perspective view showing a suspension member according to another example of the above, FIGS. 6 (a) and (b) and FIGS. 7 (a) and (b) are cross-sectional views and rafters each showing an enlarged view of a main part of a fireproof base structure of a roofing roof according to another embodiment. 8 (a) and 8 (b) are cross-sectional perspective views showing, in an enlarged scale, the main components of a conventional fireproof base structure, and FIG. 9 (a) is a perspective view of the same fireproof board. FIG. 9 (b) is a partial cross-sectional view showing only the fire-resistant board of the above. (1) ... purlin member. (2)… rafters, (2a)… mounting flange, (2b)… web, (2c)… upper support flange, (2d)… lower support flange, (3)… (3a) ... one side edge of the fire-resistant board, (3b) ... other side edge of the fire-resistant board, (4) ... suspension member, (5) ... roofing roof plate member, ( 6), (7): Fastener, (8a), (8b): Missing part. (11) ... purlin member. (21), (121), (221) ... rafter member, (22), (122), (222) ... mounting flange, (23), (123), (223) ... lower support flange , (24), (124), (224) ... web part, (25), (125), (225) ... upper support flange part, (26), (126), (226) ... bulge Locking portions, (27), (127), (227) ... locking openings, (28), (128), (228) ... locking pieces. (31) ... fireproof board, (31a) ... one side edge of fireproof board, (31b) ... fireside board on the other side edge. (41), (41a) ... suspension member, (42), (42a) ... board, (43), (43a) ... locking recess, (44), (44a) ... locking tongue , (45), (45a) ... rising part, (46) ... supporting part, (47), (47a) ... engaging part. (Five
1) Roofing roof plate member, (52) eave-side engaging part, (53) ridge-side engaging part. (61) ... fastener, (61a) ... head of the fastener.

Claims (2)

(57) [Claims] 1. A purlin member arranged at a predetermined interval, each rafter member fixed between the purlin members at a predetermined interval, a fireproof board mounted between the respective rafter members, A hanging member fixed to each rafter member at a predetermined interval to hold and lock each of the roofing shingle members, wherein the rafter member has a mounting flange on one lower side for fastening to the purlin member. Part, lower side other lower side support flange part,
An upper support flange on the other side of the upper side is provided by bending a web portion raised from the mounting flange portion by an amount equivalent to the thickness of the fireproof board and an end of the web portion so as to face the lower support flange portion, The fireproof board is held between the upper support flange portions or on the mounting flange portion so that the respective side edges abut against the web portion, and each predetermined fastening position on the upper support flange portion upper surface. A pair of a swelling locking portion having a locking opening that opens above the upper surface of the upper support flange portion and a locking piece opposed to the locking opening, respectively; A locking tongue which is at least aligned with the lower surface of the substrate and which is inserted into the locking portion protruding from the locking opening, and a locking recess which is locked by the locking piece. Thatched roof characterized by Fireproof base structure in the roots. 2. The fire-resistant base structure for a cross-roofed roof according to claim 1, wherein the end of the locking tongue formed on the base plate of the suspension member slightly protrudes from the lower surface of the base plate.