JP4855231B2 - Roof heat insulation system - Google Patents

Description

  The present invention relates to a heat insulation system for a roof that can further improve the effect of suppressing the temperature rise while utilizing the heat radiation action by the heat of vaporization, and has good workability.

As this type of background art, Patent Document 1 is known. Patent Document 1 discloses a roof material that has water absorption due to a large number of micropores on the surface, the micropores communicated with the interior, and water absorbed from the surface can be retained inside the roof material, It is composed of air gaps between waterproof materials and watering means for watering the surface of the roofing material, ensuring heat dissipation by the heat of vaporization by the roofing material, ensuring heat insulation by the air gaps, and heat dissipation by the roofing material by the watering means. I try to keep it.
Japanese Patent No. 3785553

  By the way, in the background art, although the temperature rise of the roof is suppressed by heat radiation due to the heat of vaporization and water is sprayed for that purpose, if the roof material itself is heated to a considerably high temperature by solar radiation, Even if water spraying is continued and the heat dissipation action by the heat of vaporization is maintained, a slight temperature drop can be obtained, but the roofing material will still maintain a high temperature, and thus the temperature rise of the roof cannot be effectively suppressed. There is a problem that a large amount of watering is required and the running cost increases.

  Moreover, since the roof material which has heat dissipation performance is equivalent to a tile, and is configured by arranging a large number of the roof materials on the roof, there is also a problem that workability is not good.

  The present invention was devised in view of the above-described conventional problems, and can further improve the effect of suppressing the temperature rise while utilizing the heat dissipation action by the heat of vaporization, and also has a good workability. It aims to provide a thermal system.

  The heat insulation system for a roof according to the present invention is provided with a water spray means for watering the water retaining material while installing a sheet-shaped water retaining material on the roof material while forming a ventilation layer, and the water retaining material is A joint that superimposes a water-retaining sheet material having light-shielding properties and water permeability and a non-flammable, hardly water-permeable sheet material that is less permeable than the water-retaining sheet material, and joins these sheet materials so that water and air can flow. It is characterized by being integrated by means.

  Ventilation holes communicating with the ventilation layer are formed in the water retaining material.

  The water retaining material is detachably attached to the roof material via an attachment member.

  A heat reflective paint layer is formed on the water retaining sheet material.

  In the heat insulation system for roofs according to the present invention, the effect of suppressing the temperature rise can be further improved while utilizing the heat dissipating action by the heat of vaporization, and good workability can be ensured.

  Hereinafter, a preferred embodiment of a heat insulation system for a roof according to the present invention will be described in detail with reference to the accompanying drawings. The roof thermal insulation system according to the present embodiment is provided on the roof 1 as shown in FIGS. 1 and 2. In the present embodiment, the roof 1 is composed of a metal folded plate roofing material 2 in which mountain parts 2a and valley parts 2b are alternately continued. An attachment member 3 having a U-shaped cross section is appropriately disposed on the plurality of mountain portions 2 a of the folded plate roof material 2. In the illustrated example, the mounting members 3 are arranged at equal intervals in the length direction of the ridges 2a every other ridge 2a, and are arranged in a grid pattern on the folded plate roofing material 2. Has been.

  These mounting members 3 have inward claw portions 3b formed at a pair of tips positioned downward by turning the back portion 3a upward into locking holes 2c formed at a pair of slopes of the mountain portion 2a. It is locked and attached to the folded-plate roof material 2 in the form of sandwiching the peak portion 2a on the peak portion 2a. A hook-shaped or ring-shaped locking portion 3c is formed on the back portion 3a of the mounting member 3 so as to project upward and detachably lock a water retaining material 4 described later. A plate-like pedestal 5 is provided on the folded plate roofing material 2 so as to span between the mounting members 3 as necessary. The gantry 5 is formed in a mesh shape so that the engaging portion 3c of the mounting member 3 can be inserted, and water and air can be passed. Further, the gantry 5 is made of metal so that it can withstand loads such as wind pressure and snow accumulation, and is further subjected to coating as a rust prevention measure.

  A sheet-like water retaining material 4 is installed on the gantry 5 while being supported by the gantry 5. Thereby, water retention is carried out on the folded plate roof material 2 over the entire surface above the folded plate roof material 2 between the water retaining material 4 and along the valley portion 2 b and also along the mountain portion 2 a via the attachment member 3. A ventilation layer W through which wind can flow directly under the material 4 is formed. The sheet-like water retaining material 4 is configured by superimposing a hardly water-permeable sheet material 7 on the back surface of the water retaining sheet material 6 on the front side.

  The water-retaining sheet material 6 is formed as a nonwoven fabric using a material having high light-shielding properties, for example, synthetic fibers such as carbon or polyester containing black or a pigment close to black. Since it is a nonwoven fabric, moderate water permeability can be exhibited, and water can be retained by utilizing a gap between fibers. Also, heat absorption can be obtained by carbon or the like. What is necessary is just to make it contain in a fiber, when employ | adopting carbon.

On the other hand, the hardly water-permeable sheet material 7 is formed as a knitted fabric or a woven fabric using, for example, high tensile strength glass fibers so as to be incombustible and to obtain necessary strength. In particular, it is preferable to form a twill woven fabric having a high density multifilament. For example, the following cover factor (C: ratio of yarn occupying the surface of the fabric) can be used as an index of nonflammability of the seed fabric and the like.

C = A / S = d1 / n1 / S + d2 / n2 / S- (d1 / d2) / (n1 / n2) / S

S: Unit area of woven fabric, etc. A: Area of yarn occupied in area S
d1, d2: Warp and weft thread diameter
n1, n2: number of warp and weft yarns present in area S

The cover factor is preferably 0.4 or more. It is because there exists a possibility of producing the pinhole (through-hole) exceeding 0.5 mm that a nonflammability is impaired as it is less than 0.4. The upper limit of the cover factor is 0.8 from the limit of workability. The hardly water-permeable sheet material 7 thus produced exhibits a water permeability (hard water permeability) lower than that of the water-retaining sheet material 6 due to the denseness of the weave, and moisture that permeates from the water-retaining sheet material 6. It functions to hold and thereby assist the water retaining action of the water retaining sheet material 6. The water permeability is preferably set to 1 × 10 ⁻⁴ cm / s or more and less than 1 × 10 ⁻¹ cm / s. On the other hand, the glass fiber can obtain high strength, but has a difficulty in weather resistance. However, when the surface is covered with the water-retaining sheet material 6, the entire water-retaining material 4 can have high durability.

  As described above, the water retaining material 4 has excellent weather resistance by superimposing the water retaining sheet material 6 made of a non-woven fabric exhibiting high light shielding properties on the poorly water-permeable sheet material 7 made of a woven fabric or the like having a considerable strength. In addition, it is configured so that water permeability and air permeability can be obtained as a whole. The water retaining sheet material 6 and the hardly water-permeable sheet material 7 are integrated by a joining means that joins the water retaining sheet material 7 so as to allow water and air to pass therethrough. As this kind of joining means, sheet materials 6 and 7 such as yarns 8 such as glass fibers and polyester fibers for sewing, staples used for driving with a tacker, metal wires for stitching, and the like are connected at appropriate positions. Various means for integrating and integrating can be employed. For example, as shown in FIG. 3, these sheet materials 6 and 7 are joined at a suitable pitch.

  In addition, the water retaining material 4 communicates with the ventilation layer W at an appropriate location in order to release the wind pressure acting on the surface of the water retaining material 4 by guiding the airflow sprayed on the surface thereof to the ventilation layer W below the water retaining material 4. Ventilation hole 9 is formed through. Further, a rubber or metal belt 10 is disposed in the water retaining material 4 in the length direction in accordance with the positions of the mounting members 3 arranged in a grid pattern. These belts 10 are formed with holes in which the locking portions 3c of the attachment member 3 are locked. Thereby, the water retaining material 4 is detachably attached to the folded plate roof material 2. When the belt 10 is provided, the water retaining material 4 can be stretched and installed by the belt 10, so the mount 5 may be omitted. Small animals and foreign substances enter the ventilation layer W while ensuring ventilation and water flow at the peripheral end surface 4a of the water retention material 4 or at least the end surface 4a of the water retention material 4 in a direction intersecting with the peaks 2a and valleys 2b. In order to prevent this, a mesh-shaped net member 11 is provided between the folded-plate roof member 2.

  Further, watering means for watering the water retaining material 4 is provided. The watering means is provided with a sprinkler 12 that receives water from a pipe or the like disposed on the folded plate roofing material 2 and is disposed so as to protrude through the gantry 5 and the water retaining material 4. Instead of the sprinkler 12, an irrigation tube may be disposed on the water retaining material 4. The watering means also includes a controller for controlling the amount of watering and the timing of watering. Further, the watering means is provided with a tank for storing clean water or rainwater for supplying water to the sprinkler 12 or the like. Moreover, on the folded-plate roof material 2, in order to switch use / stop of a heat insulation system as needed, such as a change in season, the water retention material 4 is covered and the water retention material 4 is exposed or concealed. An openable / closable louver mechanism 13 is provided. As is well known, the louver mechanism 13 can open and close a plurality of louvers 13b by operating a louver operating rod 13a.

  Further, a heat reflecting paint layer 14 is formed on the water retaining sheet material 6 of the water retaining material 4 by applying a heat reflecting paint or the like. The heat-reflective coating is a coating containing a pigment containing a component that effectively reflects visible light and infrared rays that change into heat energy. The heat reflecting paint is also called a highly reflective paint or a heat shielding paint. The heat-shielding effect of the heat-reflective coating becomes more prominent as the hue is closer to black than white. In addition, the heat-reflecting paint has a property of suppressing the temperature rise of the coated surface on which the heat-reflecting coating is applied, whereby the water retained in the water-retaining material 4 can be gradually evaporated to improve the sustainability of the transpiration action. be able to.

  Next, the operation of the roof thermal insulation system according to this embodiment will be described. The roof heat-insulating system basically works effectively in an environment where the roof 1 is exposed to sunlight even if it is slight. Solar radiation hits the water retaining sheet material 6 on the surface side of the water retaining material 4 on the folded roof material 2. Water is sprayed on the upper surface of the water retaining material 4 on the folded roof material 2 by a sprinkler 12 or the like of watering means. The sown water is retained in the water permeable sheet material 6 having water permeability, and a part of the water reaches the hardly permeable sheet material 7 on the back surface from the water retaining sheet material 6. The poorly water-permeable sheet material 7 has lower water permeability than the water-retaining sheet material 6, and therefore receives water from the water-retaining sheet material 6 and helps the water-retaining function of the water-retaining sheet material 6, while the hardly water-permeable sheet material 7. The water which permeate | transmitted this by the water permeability flows down or is dripped further on the lower folded-plate roofing material 2. FIG. Further, the wind flows from the surface of the water retaining material 4 and from the peripheral end surface 4 a of the water retaining material 4 onto the folded plate roof material 2 and flows through the ventilation layer W immediately below the water retaining material 4. Furthermore, the wind flows through the ventilation holes 9 from the surface of the water retaining material 4 to the ventilation layer W or, conversely, from the ventilation layer W to the surface of the water retaining material 4.

  Water is supplied to the water-retaining material 4 installed on the folded-plate roofing material 2 with respect to the folded-plate roofing material 2 that is exposed to sunlight, and the natural circulation of the wind is obtained by the ventilation layer W and the ventilation holes 9, thereby transpiration. In addition, it is possible to obtain a heat insulating action and an awning action, and to effectively suppress the temperature rise of the roof 1. Specifically, the water retaining material 4 is installed on the folded roof material 2 while forming the ventilation layer W, and the water retaining means 4 for watering the water retaining material 4 is provided. As a result, it is possible to obtain a transpiration effect due to water passing through the back side of the water retention material 4 and reaching the ventilation layer W while securing a continuous transpiration effect that takes away the heat of vaporization by the water retention material 4. The transpiration action on the back side can be promoted by the wind passing through the ventilation layer W, and an excellent cooling effect can be ensured.

  That is, the amount of latent heat of vaporization that determines the quality of the transpiration action increases as the humidity decreases and the wind speed increases. Since the back side of the water retaining material 4 faces the ventilation layer W through which the wind circulates, moisture is suppressed and a low humidity and a considerable wind speed are obtained, and convection also occurs in the ventilation layer W, thereby Efficient transpiration is ensured including the water retained on the sheet material 6 and the water dripped onto the folded roof material 2, and the heat insulation in the roof 1 is effectively prevented. Can be achieved. The cooling effect of the roof 1 can also be aided by water flowing down or dripping onto the folded roof material 2. The ventilation layer W also functions as a heat insulating layer, and this can also ensure the heat shielding effect in the roof 1.

  Moreover, in the heat insulation system of the roof concerning this embodiment, since the water retention sheet material 6 which has the water retention sheet material 6 which has light-shielding property on the surface side, and the hardly water-permeable sheet material 7 on the back surface side is used. While suppressing the temperature rise due to the light-shielding property of the water-retaining sheet material 6, the water-retaining sheet material 7 helps the water-retaining function by the water-retaining sheet material 6, thereby preventing the water that has been sprinkled from evaporating early, The water stored in 6 can be gradually evaporated, the amount of water supplied by the watering means can be reduced, and the running cost can be reduced. The water retention sheet material 6 can ensure sufficient light shielding properties and an effective sunshade effect. Since the water retaining sheet material 6 and the hardly water permeable sheet material 7 are integrated by the joining means 8 that joins the water permeable and air permeable such as sewing, the water permeable and air permeable as the water retaining material 4 is ensured. Can be guaranteed.

  Since the water retaining sheet material 6 that retains water is formed of a nonwoven fabric that retains water in the mesh, it can prevent deterioration over time compared to the case of using a material that chemically retains water by gelation or the like, and is a maintenance-free system. Can be configured. Since it is a sheet-like water retaining material 4 composed of glass fiber or polyester nonwoven fabric, it is lightweight and easy to handle. Construction can be performed and workability can be improved. Since the water retaining material 4 is configured by combining the nonflammable hardly water-permeable sheet material 7, it can be appropriately installed on the roof. By providing the belt 10 on the water retaining material 4, it is possible to easily install the water retaining material 4 with tension when it is installed on the folded plate roof material 2.

  Since the ventilation hole 9 is formed in the water retaining material 4, it is possible to promote the flow of the wind between the surface of the water retaining material 4 and the ventilation layer W, and thereby reduce the negative pressure generated on the surface of the water retaining material 4 by the strong wind. It is possible to appropriately prevent inconveniences such as the water retaining material 4 being blown by the wind. Since the water retaining material 4 is detachably attached to the folded-plate roofing material 2 via the attachment member 3, the water retaining material 4 can be removed in a season in which overheating of the roof 1 due to solar radiation is not a problem. But it can be adopted appropriately. If a concealing means such as a louver mechanism 13 that can be opened and closed is provided instead of or detachably attached, it can be properly maintained and managed by concealing it when not in use. Since the heat-reflective coating layer 14 is formed on the water-retaining sheet material 6, it is possible to further improve the light reflectivity and light-shielding property, and the color variation of the water-retaining material 4 installed on the folded-plate roof material 2. Can respond to requests.

  In the said embodiment, although the folded-plate roof material 2 was illustrated and demonstrated as a roof material, the water retention material 4 forms a mountain and a valley on the flat roof material via the attachment member 3 or in the water retention material 4 itself. By doing so, it can install, forming the ventilation layer W. FIG. In the above embodiment, the gantry 5, the louver mechanism 13, the net member 11, and the heat reflecting paint layer 14 are provided, but these may be omitted. The water retaining material 4 may be fixedly installed on the roofing material.

1 is a side sectional view showing a preferred embodiment of a roof thermal insulation system according to the present invention. It is a top view of the thermal insulation system of the roof shown in FIG. It is a sectional side view of the water retention material applied to the heat insulation system of the roof shown in FIG.

Explanation of symbols

2 Folded plate roof material 3 Mounting member 4 Water retaining material 6 Water retaining sheet material 7 Non-permeable sheet material 8 Thread 9 Ventilation hole 12 Sprinkler 14 Heat reflection paint layer W Ventilation layer

Claims (4)

The sheet-like water retaining material is installed on the roofing material while forming a ventilation layer, and has watering means for watering the water retaining material.
The water-retaining material is composed of a water-retaining sheet material having light-shielding properties and water permeability and a non-combustible, low-permeability sheet material having a water permeability lower than that of the water-retaining sheet material. A heat insulation system for a roof, characterized in that the roof is integrated with a joining means for joining.   The roof heat-insulating system according to claim 1, wherein a ventilation hole communicating with the ventilation layer is formed in the water retaining material.   The roof heat insulation system according to claim 1 or 2, wherein the water retaining material is detachably attached to the roof material via an attachment member.   The roof heat-insulating system according to any one of claims 1 to 3, wherein a heat-reflecting paint layer is formed on the water retaining sheet material.

Images