JP2013087541A - Roof structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roof structure which enhances a heat insulation effect without applying complicated working to a heat insulation panel.SOLUTION: An end accommodation recess 10 for a heat insulation panel, which is elongated in a longitudinal direction (horizontal direction) on a surface of a purlin 2 and which accommodates an end 4a of the rectangular heat insulation panel 4, and a protrusion 11, which is elongated almost throughout the longitudinal length of the end accommodation recess 10 and which is pressed against the end 4a of the heat insulation panel 4 by protruding from a wall surface 12 forming the end accommodation recess 10, are formed in the purlin 2 of a roof structure.

Description

  The present invention relates to a roof structure to which roof insulation is applied.

  Conventionally, as a technique in such a field, there is JP-A-2002-285683, and this gazette describes a heat insulating panel for a roof. This heat insulation panel is made of a plastic foam, and a rafter fitting groove portion having a U-shaped cross section to be fitted to the rafter is formed on the upper surface of the heat insulation panel, and fitted to the main building at the center of the lower surface of the heat insulation panel. A purlin fitting groove is formed, and locking notches for locking to the purlin are formed at both ends of the lower surface of the heat insulating panel. Such a heat insulation panel is constructed so as to be placed on the main building from above, and after the heat insulation panel is installed, the rafters are fixed to the main building. Since this heat insulation panel can be thickened without being interfered by rafters, the roof heat insulation effect can be enhanced.

JP 2002-285683 A

  However, since the above-described heat insulation panel is made of a plastic foam, it is easy to break at the rafter fitting groove portion or the purlin fitting groove portion, so that care must be taken in handling, and workability may be deteriorated. In addition, when a heat insulation panel with dimensional variation or warpage is forcibly fitted into a purlin or rafter, the rafter fitting groove or purlin fitting groove of the heat insulation panel is easily deformed, and between the heat insulation panel and the purlin and rafter. As a result, air flows through the opening at the intersection of the rafter fitting groove portion and the purlin fitting groove portion, which causes a decrease in the heat insulation effect. Further, in the winter season, there is a possibility that dew condensation may occur on the back surface of the base plate due to the warm current heated indoors leaking through the gap.

  An object of this invention is to provide the roof structure which improved the heat insulation effect, without giving a complicated process to a heat insulation panel.

The present invention includes a purlin fixed to a pillar and arranged in parallel to each other, a rafter spanned between the purlin and the purlin, and a heat insulating panel made of a plastic foam disposed along the rafter. In the roof structure
Purlin is
Located below the rafters, extending in the longitudinal direction on the surface of the main building, and an end accommodating recess for an insulating panel in which an end of the insulating panel is accommodated,
And a protrusion that protrudes from a wall surface that forms the end-receiving recess and is pressed against the end of the heat-insulating panel.

  By applying such a roof structure, the heat insulation panel does not require complicated processing, so the original strength of the heat insulation panel is maintained, and it becomes easy to break, and care is required for handling as in the conventional case. Or the disadvantages that make workability worse. Furthermore, since the protrusion is provided on the wall surface that forms the end receiving recess of the purlin, even if a gap is generated between the purlin and the end of the heat insulating panel in the end receiving recess, the protrusion is not By being pressed against the end of the heat insulation panel, it is possible to prevent the flow of air in the end receiving recess, and in the winter season, the warm current warmed indoors becomes the main building and the heat insulation panel. Leakage does not occur on the back surface of the base plate due to leakage through the gap between the two, and moisture and airtightness can be achieved.

Moreover, the edge part accommodating recessed part located in the upper part side of a purlin is from the 1st wall surface extended orthogonally with respect to a rafter, and the 2nd wall surface extended substantially orthogonally with respect to a 1st wall surface. The main section having a rectangular cross section has an upper surface, an inner side surface, an outer side surface, and a lower surface. The purlin is formed on the outer side surface with a first end accommodating recess formed across the upper surface and the inner side surface. It is preferable that the second end accommodating recess is provided, and the protrusion is formed on the second wall surface.
When such a configuration is employed, the heat insulating panel can be pressed by the rafters, so that the end portion of the heat insulating panel can be reliably pressed against the second wall surface of the end portion accommodating recess. And since the projection part is formed in this 2nd wall surface, the adhesion degree of a projection part and a heat insulation panel can further be raised.

In addition, it is preferable that the protrusion has a triangular cross section.
If such a structure is employ | adopted, a projection part can be stabbed into a heat insulation panel, and the airtightness of a heat insulation panel and a projection part can further be improved. Moreover, such a protrusion part contributes also to prevention of the shift | offset | difference of a heat insulation panel.

  According to the present invention, the heat insulating effect can be enhanced without subjecting the heat insulating panel to complicated processing.

It is a perspective view showing one embodiment of the roof structure concerning the present invention. It is sectional drawing which shows the state before attaching a heat insulation panel and a rafter to a main building. It is sectional drawing which shows the state after attaching the heat insulation panel and the rafter to the main building. It is a perspective view which shows the state before attaching a heat insulation panel to a main building. It is sectional drawing which shows the state which has a clearance gap between a main building and a heat insulation panel.

  Hereinafter, a preferred embodiment of a roof structure according to the present invention will be described in detail with reference to the drawings. The building side is called “inside” and the eaves side is called “outside”.

  As shown in FIG. 1, in the roof structure of a wooden house, rafters 3 are fixed by nails in a direction orthogonal to the purlin 2 fixed to the pillar 1. A heat insulating panel 4 is laid so as to block between the rafters 3. And a field board is stretched on the rafter 3, a waterproof sheet is pasted on the field board as a waterproofing work, and a tile is laid on it. In addition, this heat insulation panel 4 consists of plastic foams, such as a phenol foam, for example.

  2 to 4, the purlin 2 located below the rafter 3 has an upper surface 2a, an inner side surface 2b, an outer side surface 2c, and a lower surface 2d. The main building 2 extends in the longitudinal direction (horizontal direction) on the surface of the main building 2, and also includes an end-receiving recess 10 for an insulating panel in which the end 4a of the rectangular insulating panel 4 is stored, A protrusion 11 is formed that extends over substantially the entire length in the longitudinal direction of the recess 10 and protrudes from the wall surface 12 that forms the end accommodating recess 10 and is pressed against the end 4 a of the heat insulating panel 4. .

  The end accommodating recess 10 located on the upper side of the purlin 2 includes a first end accommodating recess 10A formed over the upper surface 2a and the inner side surface 2b of the purlin 2 and a second end formed on the outer side surface 2c. And an end accommodating recess 10B. The first and second end accommodating recesses 10A and 10B include a first wall surface 12a that extends perpendicular to the rafter 3 and a first wall surface 12a that extends substantially at right angles to the first wall surface 12a. 2 wall surfaces 12b.

  The protruding portion 11 formed on the second wall surface 12b has a triangular cross-section protruding upward. The protrusion 11 having such a shape can be stabbed into the lower surface of the end 4a of the heat insulating panel 4, and the air density between the heat insulating panel 4 and the protrusion 11 can be further improved. And this projection part 11 also contributes to prevention of the shift | offset | difference of the heat insulation panel 4. FIG.

  Further, the upper corner of the purlin 2 is cut off obliquely so as to be a notch surface 2e. Then, the rafter 3 is pressed against the purlin 2 so that the lower surface of the rafter 3 is in contact with the notch surface 2e of the purlin 2, and the rafter 3 is fixed to the purlin 2 with nails or screws. In addition, you may form the notch part of the cross-sectional right-angled triangle shape for the upper corner of the main building 2 to enter into the lower surface side of the rafter 3.

  As shown in FIGS. 2 and 3, after fitting the end 4 a of the heat insulating panel 4 into the first and second end receiving recesses 10 </ b> A and 10 </ b> B of the purlin 2, the rafter 3 is inserted into the purlin 2 with nails or screws. The heat insulation panel 4 is pressed down from above by the rafter 3, and the end 4a of the heat insulation panel 4 is securely attached to the second wall surface 12b of the first and second end accommodating recesses 10A and 10B. Can be pressed against. And since the projection part 11 is formed in this 2nd wall surface 12b, the adhesiveness of the projection part 11 and the heat insulation panel 4 can be raised.

  In particular, when the protruding portion 11 has a triangular cross section, the protruding portion 11 can be reliably recessed into the lower surface of the end portion 4 a of the heat insulating panel 4.

  Since the structure described above is applied to the main building 2, the heat insulating panel 4 does not require complicated processing, so that the original strength of the heat insulating panel 4 is maintained, and it is easy to break or handle as before. Defects that require attention or degrade workability have been eliminated.

  Furthermore, since the projection 11 is provided on the second wall surface 12b of the first and second end receiving recesses 10A and 10B, the ends of the purlin 2 and the heat insulating panel 4 in the end receiving recesses 10A and 10B. Even if the gap S (see FIG. 5) occurs between the portion 4a and the protrusion 11 is pressed against the end 4a of the heat insulating panel 4, the air flow in the end receiving recesses 10A and 10B As a result, in the winter, the warm current heated indoors leaks through the gap S between the main building 2 and the heat insulation panel 4 and causes dew condensation on the back surface of the field board. No generation occurs and moisture and airtightness can be achieved.

  It goes without saying that the present invention is not limited to the embodiment described above. For example, the protrusion 11 is not limited to a triangular cross section, and may be a rectangular cross section, a trapezoidal cross section, or a semicircular cross section.

  DESCRIPTION OF SYMBOLS 1 ... Pillar, 2 ... Purlin, 2a ... Upper surface of purlin, 2b ... Inner side surface of purlin, 2c ... Outer side surface of purlin, 2d ... Lower surface, 3 ... Rafter, 4 ... Thermal insulation panel, 10A ... 1st edge part accommodation recessed part DESCRIPTION OF SYMBOLS 10B ... 2nd edge part accommodation recessed part, 11 ... Projection part, 12a ... 1st wall surface, 12b ... 2nd wall surface.

Claims (3)

A purlin fixed to a pillar and arranged in parallel to each other, a rafter spanned between the purlin and the purlin, and a heat insulation panel made of a plastic foam disposed along the rafter In the roof structure,
The purlin is
Located below the rafter, extends in the longitudinal direction on the surface of the purlin, and an end receiving recess for an insulating panel in which an end of the insulating panel is stored;
A projection that extends over substantially the entire length of the end-receiving recess and protrudes from a wall surface that forms the end-receiving recess and is pressed against the end of the heat insulating panel. A characteristic roof structure. The end accommodating recess located on the upper side of the purlin includes a first wall surface extending orthogonally to the rafters and a second wall surface extending substantially perpendicular to the first wall surface. And consist of
The purlin having a rectangular cross section has an upper surface, an inner side surface, an outer side surface, and a lower surface, and the purlin includes a first end receiving recess formed across the upper surface and the inner side surface, and the outer surface. A second end accommodating recess formed on the side surface, and
The roof structure according to claim 1, wherein the protrusion is formed on the second wall surface.   The roof structure according to claim 1, wherein the protrusion has a triangular cross section.

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