JP2008025304A - Ventilating structure of eaves soffit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ventilating structure of an eaves soffit material attaining sufficient ventilation and having fire resisting performance. <P>SOLUTION: An eaves clearance S is provided between the tip part of the eaves soffit material 7 of a roof (a lean-to roof) 2 projected from an external wall body 1, and an eaves part of the roof 2. Ventilation is performed through this eaves clearance S, and the eaves clearance S is provided with a bracket metal 15 receiving the tip part of the eaves soffit material 7, with a space from the eaves part. At least one of the bracket metal 15 and the eaves part is provided with a thermal expansion refractory material 22. This constitution can provide the ventilating structure of the eaves soffit material attaining sufficient ventilation and having fire resisting performance. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a ventilation structure for an eaves ceiling of a roof such as a lower house.

As an example of the eaves ceiling ventilation structure, the technique described in Patent Document 1 is known. This technology is a back of the eaves, and a plate-like member is arranged at a position facing the ventilation surface where the vents of the eaves ceiling material are arranged, and between the eaves ceiling material and the plate-like member, An air flow path that connects the vent hole of the eaves ceiling material and the attic is formed, and the air flow path is closed by being heated by the air flow path. It is characterized by providing a thermally foamed refractory material that blocks ventilation. According to this, since the thermally foamed refractory material is provided at the end of the plate-like member, the fired refractory material is heated and foamed by the heat of the flame when a fire occurs in a neighboring house, etc. Can be prevented, and the spread of fire from the neighboring house can be surely prevented.
JP 2000-204697 A

By the way, although the eaves ceiling material is arrange | positioned in parallel with the inclination direction of a roof in the ventilation structure of the eaves top material described in the said gazette, an eaves ceiling material may be arrange | positioned horizontally.
In such eaves ceiling materials arranged horizontally, a gap may be provided between the front end portion and the eaves tip portion of the roof, and ventilation may be performed through the gap. On the other hand, the front end of the eaves ceiling material may be supported by a received item or the like. However, if this received item is provided in the entire gap, the gap is occupied by the received item and there is a possibility that sufficient ventilation cannot be obtained.
Moreover, although a flame can be shut off by providing a thermally foamed refractory material in the gap, it becomes difficult to dispose a thermally foamed refractory material in the gap when the gap is occupied by a metal receiving article.

  This invention is made | formed in view of the said situation, and makes it a subject to provide the ventilation structure of the eaves top material which can take sufficient ventilation and was equipped with fireproof performance.

In order to solve the above-described problem, the invention described in claim 1 includes, for example, as shown in FIGS. An eaves gap S is provided between the eaves part of the roof 2 and the eaves ceiling ventilation structure is configured to ventilate through the eaves gap S,
In the eaves edge gap S, a metal receiver 15 that receives the tip of the eaves ceiling material 7 is provided apart from the eaves edge part,
A thermal expansion refractory material 22 is provided on at least one of the metal receiver 15 and the eaves portion.

According to the invention described in claim 1, the received object 15 is provided in the eaves gap S between the front end of the eaves ceiling material of the roof 2 and the eaves part of the roof 2. Since they are provided apart from each other, the eaves gap S is not occupied by the received object 15. Therefore, sufficient ventilation can be taken from the eaves gap S.
In addition, since the thermal expansion refractory material 22 is provided on at least one of the received object 15 and the eaves portion of the roof, the thermal expansion refractory material 22 expands in the event of a fire or the like, and the eaves clearance S is formed. Closed.
Therefore, it is possible to provide an eaves material ventilation structure that can provide sufficient ventilation and fire resistance.

Invention of Claim 2 is the ventilation structure of the eaves ceiling of Claim 1,
The metal receiver 15 is provided with a communication portion 21 that allows the eaves gap S and the attic space to communicate with each other.

  According to the second aspect of the present invention, since the receiving part 15 is provided with the communication part 21 for communicating the eaves gap S and the attic space, the ventilation of the attic space can be ensured through the communication part 21. Yes.

Invention of Claim 3 is the ventilation structure of the eaves ceiling of Claim 2,
The metal receiving piece 15 includes an engagement metal piece 17 with which a front end portion of the eaves ceiling material 7 is engaged, and a parting piece 18 provided so as to cover a lower surface and a side surface of the engagement metal piece 17. It is characterized by that.

  According to the third aspect of the present invention, the front end portion of the eaves ceiling member 7 is engaged with the engagement hardware 17 so that the front end portion can be reliably supported. Further, since the lower surface and the side surface of the engagement metal piece 17 are covered with the parting metal object 18, the engagement metal part 17 is not exposed, and the parting process of the front end portion of the eaves ceiling material 7 is excellent.

Invention of Claim 4 is the ventilation structure of the eaves ceiling of Claim 3,
The engagement hardware 17 includes an engagement portion 17a to which a tip portion of the eaves ceiling material 7 is engaged, and a fixing portion 17b for fixing the engagement portion 17a to the eaves tip portion.
The parting hardware 18 includes a parting part 18a that covers a lower surface and a side surface of the engaging part 17, and a fixing part 18b that fixes the parting part 18a to the eaves part.

  According to the fourth aspect of the present invention, since the engagement hardware 17 is fixed to the eaves tip by the fixing portion 17b, the front end portion of the eaves ceiling material 7 can be reliably supported by the engagement hardware 17. . Moreover, since the parting object 18 is fixed to the eaves part by the fixing part 18b, the parting object 18 can be reliably fixed to the eaves part.

Invention of Claim 5 is the ventilation structure of the eaves ceiling of Claim 4,
A plurality of slits 20 having air permeability are formed in the parting portion 18a of the parting piece 18,
A gap S1 is provided between the engagement portion 17a of the engagement hardware 17 and the lower surface of the eaves portion,
The communication part 21 is constituted by the slit 20 and a gap S1.

  According to the fifth aspect of the present invention, the slit 20 formed in the parting part 18a of the parting metal 18, and the gap S1 provided between the engaging part 17a of the engaging part 17 and the lower surface of the eaves part. Since the communication part 21 is comprised by this, ventilation of an attic space can be performed reliably via this communication part 21. FIG.

According to the present invention, the received object for receiving the front end portion of the eaves ceiling material is provided in the eaves clearance provided between the front end portion of the eaves ceiling material and the eaves end portion of the roof. Since the eaves gap is not occupied by the received object, sufficient ventilation can be taken from the eaves gap.
Further, since the thermal expansion refractory material is provided on at least one of the received object and the eaves portion of the roof, the thermal expansion refractory material expands and closes the eaves gap in the event of a fire or the like.
Therefore, it is possible to provide an eaves material ventilation structure that can provide sufficient ventilation and fire resistance.

Embodiments of the present invention will be described below with reference to the drawings.
1 is a cross-sectional view showing an example of an eaves ceiling ventilation structure according to the present invention, FIG. 2 is an enlarged view of a circle A portion in FIG. 1, and FIG. 3 is an enlarged view of a circle B portion in FIG.
As shown in FIG. 1, the outer wall main body 1 is provided with a lower house 2 protruding from the outer wall main body 1, and a fireproof plate 3 is provided at a joint portion between the outer wall main body 1 and the lower house 2. ing. This refractory plate 3 is formed of a calcium silicate plate mixed with fibers, and blocks the flame that has entered the lower house 2 so that it does not enter the outer wall body 1 or delays the intrusion. A base plate 5 is attached to the tree 4 of the lower house 2, and a roof material 6 is laid on the base plate 5. The base material 5 is formed of a calcium silicate plate mixed with fibers.

An eaves ceiling material 7 is horizontally provided below the tree 4 of the lower house 2. The eaves ceiling material 7 is formed of a calcium silicate plate mixed with fibers. Further, a field edge 8 is fixed to the back surface of the eaves ceiling material 7, and the field edge 8 is suspended from the tree 4 by a hanging tree 9.
A nose cover 10 and an eaves tip member 11 having a substantially L-shaped cross section are provided at the tip of the lower house 2. The eaves member 11 includes two plate members 11 a and 11 b provided vertically and two plate members 11 c and 11 d provided horizontally. The plate member 11 b is provided vertically on the front surface of the nose cover 10. A plate member 11 c is horizontally provided on the lower surface of the nose cover 10.
The surfaces of the horizontal plate material 11c and the plate material 11d facing the outer wall side (right side) are substantially flush with the back surface of the nose cover 10, and there is an eaves gap between this surface and the tip of the eaves ceiling material 7. S is provided. And the inside of the lower house 2 is ventilated through the eaves gap S.

The eaves gap S is provided with a metal receiver 15 for receiving the tip of the eaves ceiling material 7, and this metal receiver 15 is provided on the lower surface of the eaves of the lower house 2, that is, the lower surface of the tip of the rafter 4. It is fixed to the lower surface of the base adjustment girder 16 having a triangular cross section. Thus, the received item 15 is provided away from the eaves portion of the lower house 2.
The metal receiving piece 15 is constituted by an engagement metal piece 17 with which the front end portion of the eaves ceiling material 7 is engaged, and a parting piece 18 provided so as to cover the lower surface and the side surface of the engagement metal piece 17.

As shown in FIGS. 2 and 5, the engagement hardware 17 includes an engagement portion 17 a to which the front end portion of the eaves ceiling member 7 is engaged, and the engagement portion 17 a on the lower surface of the eaves portion, that is, a base adjustment girder. 16 is provided with a fixing portion 17b that is fixed to the lower surface of 16.
The engaging portion 17a is formed in a U-shaped cross section and extends in the length direction of the eaves ceiling material 7 (the direction orthogonal to the paper surface in FIGS. 1 and 2). The distance between the mutually opposing pieces 17c, 17c of the U-shaped engaging portion 17a is substantially equal to or slightly larger than the thickness of the eaves ceiling material 7.
The fixing portion 17b includes a rising plate portion 17d that rises upward from a substantially central portion in the length direction of the engaging portion 17a, and a horizontal plate portion 17e that is bent at a right angle from the upper end portion of the rising plate portion 17d. As shown in FIG. 2, the horizontal plate portion 17 e of the fixing portion 17 b is in contact with the lower surface of the base adjustment girder 16 and then fixed by the nail 19. In this state, the engagement portion 17a of the engagement hardware 17 is opened to the inside (right side in FIG. 2), and the distal end portion of the eaves ceiling material 7 is inserted between the pieces 17c, 17c of the engagement portion 17a. As a result, the front end portion of the eaves ceiling material 7 is engaged with the engaging portion 17a. Thus, the front end portion of the eaves ceiling material 7 is supported by the engagement hardware 17.
Further, as shown in FIG. 5B, a gap S <b> 1 is provided between the engagement portion 17 a of the engagement hardware 17 and the lower surface of the base adjustment girder 16. The gap S1 is provided on both sides of the fixed portion 17b of the engagement hardware 17, and the gap S is communicated with the inside of the lower house 2, that is, the attic space through the gap S1.

As shown in FIGS. 2 and 4, the parting piece 18 fixes the parting part 18 a that covers the lower surface and the side surface of the engagement piece 17, and the parting part 18 a to the lower surface of the eaves part, that is, the lower surface of the base adjustment girder 16. And a fixing portion 18b.
The parting portion 18a is formed in a substantially L-shaped cross section, and the vertical piece portion 18c covers the side surface of the engagement metal piece 17, and the horizontal piece portion 18d covers the lower surface of the engagement metal piece 17. Further, a rising portion 18e that rises vertically is formed at the tip of the horizontal piece 18d, and this rising portion 18e comes into contact with the tip of the piece 17c on the lower side of the engagement hardware 17. Yes.
In addition, a large number of vertically long slits 19 having air permeability are formed at predetermined intervals along the longitudinal direction of the parting portion 18a in the vertical piece part 18c of the parting part 18a. The slits 19 and the gap S1 constitute a communication portion 20 that allows the eaves gap S and the attic space to communicate with each other.

  In addition, a thermal expansion refractory material 22 that expands by heating and closes the eaves gap S is provided in advance on the plate material 11c at the eaves part of the lower house 2. The thermal expansion refractory material 22 is made of a graphite-based material, and foams when heated to about 200 degrees or more, and expands about 15 to 20 times with a thickness of 2 to 3 mm, for example.

  In addition, a receiving object 23 is fixed to the outer wall main body 1. As shown in FIG. 3, the metal receiver 23 is integrally composed of an upper plate portion 23 a, a lower plate portion 23 b, and a vertical plate portion 23 c that connects the upper and lower plate portions 23 a and 23 b. The upper plate portion 23 a is formed in a substantially hemispherical shape, and the distal end thereof is in contact with the upper surface of the base end portion of the eaves ceiling material 7. The lower plate portion 23 b is formed in a flat plate shape and is in contact with the lower surface of the base end portion of the eaves ceiling material 7. The base end portion of the eaves ceiling material 7 is inserted between the upper plate portion 23a and the lower plate portion 24b, and is sandwiched between the upper and lower plate portions 23a and 23b. Further, the metal receiver 23 is fixed to the outer wall main body 1 by driving the vertical plate portion 23c of the nail 24 into the outer wall main body 1.

  The eaves ceiling member 7 is horizontally supported by a metal receiver 15 provided at the eaves portion of the lower house 2 and a metal receiver 23 fixed to the outer wall body 1. The metal objects 15 and 23 extend in the eaves direction (the direction orthogonal to the paper surface in FIG. 1), and the eaves ceiling materials 7 supported by the metal objects 15 and 23 are joined in the eaves direction. That is, as shown in FIG. 6, a concave groove 7 a is formed on the end surface of one eave ceiling material 7, and a convex strip 7 b is formed on the end surface of the other eave ceiling material 7. By fitting into the groove 7a, the eaves ceiling materials 7 and 7 are joined together.

According to the present embodiment, the received object 15 is provided in the eaves clearance S between the front end of the eaves ceiling material 7 of the lower house 2 and the eaves part of the lower house 2. Since they are provided apart from each other, the eaves gap S is not occupied by the received object 15. Therefore, sufficient ventilation can be taken from the eaves gap S.
Moreover, since the thermal expansion refractory material 22 is provided in the eaves part of the received object 15 and the lower house 2, the thermal expansion refractory material 22 expands in the event of a fire or the like, and the eaves gap S is closed.
Therefore, it is possible to provide an eaves material ventilation structure that can provide sufficient ventilation and fire resistance.

Moreover, since the communication part 21 which connects the eaves clearance S and the attic space is provided in the received article 15, the ventilation of the attic space can be reliably performed via the communication part 21.
Furthermore, when the front end portion of the eaves ceiling member 7 is engaged with the engagement hardware 17, the front end portion can be reliably supported. Further, since the lower surface and the side surface of the engagement metal piece 17 are covered with the parting metal object 18, the engagement metal part 17 is not exposed, and the parting process of the front end portion of the eaves ceiling material 7 is excellent.
In addition, since the engagement hardware 17 is fixed to the lower surface of the eaves tip portion by the fixing portion 17b, the front end portion of the eaves ceiling material 7 can be reliably supported by the engagement hardware 17. Moreover, since the parting object 18 is fixed to the lower surface of the eaves part by the fixing part 18b, the parting object 18 can be reliably fixed to the lower surface of the eaves part.
Further, the communication portion 21 is configured by the slit 20 formed in the parting portion 18a of the parting metal 18 and the gap S1 provided between the engaging part 17a of the engaging metal 17 and the lower surface of the eaves part. Therefore, the attic space can be reliably ventilated through the communication portion 21.

  In the present embodiment, the case where the eaves ceiling ventilation structure according to the present invention is applied to the lower house 2 has been described as an example. However, the present invention is an ordinary roof, and the eaves ceiling of the eaves protruding from the outer wall body is used. It can also be applied to ventilation structures.

An example of the eaves ceiling ventilation structure which concerns on this invention is shown, and it is the sectional drawing. FIG. 2 is an enlarged view of a circle A portion in FIG. 1. FIG. 2 is an enlarged view of a B circle portion in FIG. 1. FIG. 2 shows a parting piece, in which (a) is a sectional view and (b) is a side view. FIG. 2 shows an engagement hardware, wherein (a) is a sectional view and (b) is a side view. It is sectional drawing which shows the junction part of an eaves ceiling material equally.

Explanation of symbols

1 Exterior wall body 2 Shack (roof)
7 eaves material 15 receiving object 17 engaging metal 17a engaging part 17b fixing part 18 parting piece 18a parting part 18b fixing part 20 slit 21 communicating part 22 thermal expansion refractory material S eaves gap S1 gap

Claims (5)

An eaves clearance is provided between the front end of the eaves ceiling material protruding from the outer wall body and the eaves end of the roof, and the eaves ceiling ventilation structure is designed to ventilate through the eaves clearance. There,
In the eaves gap, a receiving object for receiving the tip of the eaves ceiling material is provided apart from the eaves part,
A ventilation structure for an eaves ceiling, wherein a thermal expansion refractory material is provided on at least one of the received object and the eaves tip. In the eaves ceiling ventilation structure according to claim 1,
A ventilating structure for an eaves ceiling, wherein the metal receiving part is provided with a communication portion for communicating the eaves gap and the attic space. In the eaves ceiling ventilation structure according to claim 2,
The metal receiving object includes an engagement metal object to which a front end portion of the eaves ceiling material is engaged, and a parting metal object provided so as to cover a lower surface and a side surface of the engagement metal object. The eaves ceiling ventilation structure. In the eaves ceiling ventilation structure according to claim 3,
The engagement hardware includes an engagement portion with which a front end portion of the eaves ceiling material is engaged, and a fixing portion that fixes the engagement portion to an eaves tip portion,
The eaves ceiling ventilation structure, wherein the parting hardware includes a parting part that covers a lower surface and a side surface of the engagement metal part, and a fixing part that fixes the parting part to an eaves tip part. In the eaves ceiling ventilation structure according to claim 4,
In the parting part of the parting hardware, a plurality of slits having ventilation are formed,
A gap is provided between the engagement portion of the engagement hardware and the lower surface of the eaves portion,
The eaves ceiling ventilation structure, wherein the communication part is constituted by the slit and a gap.

Images