JP6209005B2 - Thermal insulation for building and thermal insulation construction method using the same - Google Patents

Description

  The present invention relates to a heat insulating material used for a building such as a wooden house, and a heat insulating construction method for a floor, a wall, a roof and the like using the heat insulating material.

  High-density glass wool plates and hard foam plastic plates are used as plate-like heat insulating materials for buildings such as wooden houses. Conventionally, these plate-like heat insulating materials have been variously processed. Yes.

  In Patent Document 1, at the center in the width direction of the plate-like heat insulating material, a groove is provided on the back surface, a slit parallel to the groove is provided on the front surface, the surface is convex, and is bent in the width direction and inserted between the joists, There is disclosed a heat insulating material that performs heat insulation by returning a folded plate-shaped heat insulating material to a flat shape. Such a heat insulating material can be bent at an angle corresponding to the opening and closing width of the groove and the slit by closing the opening of the groove on the back surface and opening the mouth of the front surface when bending. This will not occur, and breakage at the bent portion will be prevented.

  Patent Document 2 discloses a heat insulating material provided with elasticity imparting portions in which grooves extending in the longitudinal direction are alternately formed on both front and back surfaces of a foamed resin board. Such a heat insulating material is provided with a support base part that is not formed with a groove at one side end part, and is provided with an anti-bending part that is not formed with a groove in the elasticity applying part that follows the support base part. The entire material is difficult to bend to prevent heat insulation construction in a short time and drooping after the heat insulation construction.

JP 2001-132128 A JP 2001-49758 A

  The heat insulating material disclosed in Patent Document 1 is formed with slits and grooves having different shapes and sizes on the front and back sides, so that compressive stress does not act evenly on the joists after heat insulation work and is sufficiently retained There was a risk that the power would not be exerted or the surface of the heat insulating material would not be flat. Further, in any of the heat insulating materials of Patent Documents 1 and 2, when the width of the groove after the heat insulation construction is wide, a heat insulation defect occurs, the heat insulation performance is lowered, and the compressive stress to the support member such as joists is also reduced. In some cases, sufficient holding power could not be obtained.

  The problem of the present invention is that it can be easily bent and inserted between the support members at the time of the heat insulation construction, and at the same time, exhibits a good holding force due to sufficient compressive stress on the support member after the heat insulation construction, and has excellent heat insulation performance. It is in providing the heat insulating material for construction, and its heat insulation construction method.

In the first aspect of the present invention, a plurality of grooves in the thickness direction of the plate-like heat insulating material are 15 mm or more and 30 mm or less in the width direction in the center regions in the width direction of the front and back surfaces of the plate-like heat insulating material. The groove is formed in parallel with the longitudinal direction at regular intervals, the groove has a constant width from the opening to the bottom and is 1 mm or more and 2 mm or less, and a groove formed on the front surface and a groove formed on the back surface, There are formed as 75% or less than 50% of the depth of the grooves in alternating a and the thickness direction in the width direction overlap each other, the width direction cross section of the plate-like heat insulating material is rectangular, the The width of the plate-like heat insulating material is larger than the interval between the support members into which the plate-like heat insulating material is inserted, and the total of the groove spaces on the front surface and the back surface after the heat insulation work is 50% or less before the heat insulation work. Contact with the groove formed in the plate-like heat insulating material ,
In the cross-section in the width direction of the plate-shaped heat insulating material, the shape of the bottom of the groove is a substantially circular shape having a diameter larger than the width of the opening of the groove, and the inner surface of the bottom has a resin film formed by heat melting. It is the heat insulating material for buildings characterized by this.

In the heat insulating material for building of the present invention, the plate-shaped heat insulating material is made of an extruded polystyrene foam plate having a thickness of 40 mm or more, a density of 28 kg / m ³ or more and an average cell diameter of 0.4 mm or less , including a preferred form the.

  According to a second aspect of the present invention, the architectural heat insulating material according to the first aspect of the present invention is inserted between a pair of support members arranged in parallel with a gap narrower than the width of the architectural heat insulating material while being bent in the width direction. Then, the heat insulating construction method is characterized in that the architectural heat insulating material bent next is returned to a flat state.

  The heat insulating material for building of the present invention has flexibility and bending rigidity suitable for heat insulating construction by forming grooves with a predetermined width and length evenly on both the front and back sides only in the central region in the width direction of the plate-shaped heat insulating material. And the retention strength after heat insulation construction is obtained, the heat insulation construction work is easy, and after the heat insulation construction, the surface is flat and the construction failure such as the occurrence of sag and surface irregularities is prevented. Moreover, the heat insulation defect resulting from a groove | channel is suppressed after heat insulation construction, and high heat insulation performance is obtained.

  In the present invention, the effect can be obtained at a higher level by specifying the material of the plate-like heat insulating material. Moreover, the failure | damage resulting from the groove | channel at the time of bending a plate-shaped heat insulating material is prevented by making the shape of the bottom part of a groove | channel into a substantially circular shape.

It is the whole perspective view which shows the structure of the heat insulating material for buildings of this invention typically, width direction sectional drawing, and its partial enlarged view. It is sectional drawing which shows the heat insulation construction process using the heat insulating material for buildings of this invention. It is sectional drawing which shows the shape of the groove | channel of the heat insulating material for buildings of this invention. It is a perspective view which shows the example which used the heat insulating material for buildings of this invention as a heat insulating material for floors. It is a perspective view which shows the example which used the heat insulating material for buildings of this invention as a heat insulating material for walls.

  As the plate-like heat insulating material of the present invention, those having excellent heat insulating performance, excellent mechanical strength such as compressive strength and bending strength, and easy processing are preferable. Specifically, it is made of a fiber-based heat insulating material such as glass wool or rock wool, which is formed in a plate shape at a high density, or made of a plastic foam.

As the plastic foam, a hard foam made of various synthetic resins such as a polystyrene foam, a polyethylene foam, a hard polyurethane foam, and a phenol foam can be used. Among them, an extruded expanded polystyrene plate having high heat insulation performance and excellent water resistance, compressive strength, and workability is preferable. More specifically, the thickness is 40 mm or more, the density is 28 kg / m ³ or more, and the average cell diameter is An extruded foamed polystyrene plate of 0.4 mm or less is preferably used. As such an extruded polystyrene foam plate, “Styloace (registered trademark)” manufactured by Dow Chemical Co., Ltd. is commercially available.

  Hereinafter, the present invention will be specifically described with reference to the drawings.

  FIG. 1 shows an example of a basic structure of a heat insulating material for building 1 according to the present invention, (a) is an overall perspective view, (b) is a cross-sectional view in the width direction, and (c) is a partially enlarged view of (b). FIG.

  In the present invention, a plurality of grooves 11a and 11b having the same size and the same shape are formed on both the front and back surfaces of the plate-like heat insulating material 10, preferably 5 to 10 in the thickness direction of the plate heat insulating material 10. Has been. The grooves 11a and 11b are formed in the center region in the width direction of the plate-like heat insulating material 10 in parallel with the longitudinal direction of the plate-like heat insulating material 10, and are arranged at a constant interval in the width direction.

  In the present invention, the grooves 11a and 11b have a constant width W in the cross section in the width direction of the plate-like heat insulating material 10, and are 2 mm or less, preferably 1 mm or more. If the width W exceeds 2 mm, the groove space after the heat insulation work becomes large and the heat insulation performance may be deteriorated. Examples of the method for forming the grooves 11a and 11b include a cutting process using a circular saw and a melting process using a heated metal wire. When both are processed with a target value of 1.5 mm, depending on the processing accuracy, 1 mm It can be formed in a range of ˜2 mm.

  In addition, the depth D of the grooves 11a and 11b is set so that the length C of the overlapping portion in the width direction of the plate-like heat insulating material 10 is 50% or more of the depth D of the grooves 11a and 11b. To do. When the length C is less than 50% of D, the repulsive force at the time of bending is high, and it becomes difficult to bend or the plate-like heat insulating material 10 is easily damaged, which is not preferable. Even if the length C becomes too long, the distance from the bottom of the grooves 11a and 11b to the surface of the plate-like heat insulating material 10 on the opposite side is short, and is easily damaged when bent. Is preferably 75% or less.

  Further, the interval P between the grooves 11a and 11b is 30 mm or less. When the distance P exceeds 30 mm, the repulsive force at the time of bending is high, and it becomes difficult to bend or the plate-like heat insulating material 10 is easily damaged, which is not preferable. Moreover, since the heat insulating material between the groove | channel 11a and the groove | channel 11b will become thin and the plate-shaped heat insulating material 10 will be damaged easily when the space | interval P becomes too short, 15 mm or more is preferable for the space | interval P.

Further, in the present invention, as the plate-like heat insulating material 10, an extruded foamed polystyrene plate having a thickness T of 40 mm or more, a density of 28 kg / m ³ or more, and an average cell diameter of 0.4 mm or less is preferably used. In the plate, the thickness T is preferably 100 mm or less.

The density of the foam can be calculated by dividing the mass (kg) of the foam by the volume (m ³ ) of the foam in accordance with JIS A 9511: 2006.

  Moreover, the average bubble diameter of a foam can be measured by the method based on ASTMD3567.

  In the present invention, the grooves 11a and 11b are formed so that the plate-like heat insulating material 10 can be easily bent at the time of heat insulation construction, but after the heat insulation construction, the spaces formed by the grooves 11a and 11b become heat insulation defects. Therefore, in the heat insulation construction, the width of the plate-like heat insulating material 10 is formed larger than the interval between the support members into which the plate-like heat insulating material 10 is inserted, and the grooves 11a and 11b are compressed by the heat insulation construction. The total remaining ratio of the groove spaces formed by the front surface groove 11a and the back surface groove 11b before and after the heat insulation construction, that is, the groove formed by the front surface groove 11a and the back surface groove 11b before the heat insulation construction, respectively. The width and number of the grooves 11a and 11b are set so that the total of the respective groove spaces after the heat insulation work is 50% or less with respect to the total of the spaces.

  In addition, the total remaining ratio of the groove space before and after the heat insulation construction is ideally 0% from the viewpoint of heat insulation performance. Therefore, the width of the plate-like heat insulating material 10 is obtained by adding 50% or more and 100% or less of the total width of the front surface grooves 11a or the total width of the back surface grooves 11b to the gap between the support members to be heat-insulated. To do.

  FIG. 2 is a schematic cross-sectional view showing the process of heat insulation construction using the building heat insulating material 1 of the present invention. As shown in FIG. 2 (a), the architectural heat insulating material 1 of the present invention is bent so that the opening of the groove 11a on the front surface is opened and the opening of the groove 11b on the back surface is closed to make the surface convex. Can do. In this way, the architectural heat insulating material 1 of the present invention is folded and inserted between the pair of support members 20 and 20 from the back side. Thereafter, the surface is flattened as shown in FIG. 2B by pressing down the center of the convex surface. As described above, since the plate-shaped heat insulating material 10 is configured so that the width of the building heat insulating material 1 is larger than the gap between the support members 20, 20, it is formed on the plate-shaped heat insulating material 10 after the heat insulating construction. The grooves 11a and 11b that have been formed are compressed, and the groove space becomes narrower than before the heat insulation work, air convection in the groove space is also prevented, and a decrease in heat insulation performance due to heat insulation defects is prevented.

  Moreover, in the building heat insulating material 1 according to the present invention, the grooves 11a and 11b having the same shape and size are formed uniformly on the front and back surfaces of the plate-shaped heat insulating material 10, so Compressive stress due to a plurality of grooves 11a and 11b is equally applied to 20. Therefore, in combination with the compressive stress due to sufficient compression of the grooves 11a and 11b, a good holding force is obtained for the support members 20 and 20, the surface is raised after the heat insulation work, and the flatness of the surface is impaired. The problem is prevented.

  Furthermore, the heat insulating material for building 1 of the present invention has the grooves 11a and 11b formed only in the center region in the width direction of the plate-shaped heat insulating material 10, and the grooves 11a and 11b are not formed in the vicinity of both ends. The rigidity of the plate-like heat insulating material 10 and the holding force between the support members 20 and 20 can be ensured.

  In the present invention, the grooves 11a and 11b have a constant width in the cross-section in the width direction of the plate-shaped heat insulating material 10, but as shown in FIG. 3, the shape of the bottom 11c may be a substantially circular shape having a diameter larger than the width. preferable. The grooves 11a and 11b having such a shape can be obtained by pressing a heated metal wire against the front and back surfaces of the plate-like heat insulating material 10 made of plastic foam to melt and process the plastic foam. As a result of this processing, a resin film having a higher tear strength than the surroundings is formed on the inner surface of the bottom portion 11c by thermal melting, and the plate-like heat insulating material 10 is damaged when the groove 11a is opened by bending during heat insulation construction. Is prevented.

  The heat insulating material for buildings of the present invention can be used as a heat insulating material for floors, walls, and roofs.

  When the building heat insulating material according to the present invention is used as a floor heat insulating material, for example, as shown in FIG. The support member is joist 102. In addition, a floor material 103 is placed on the architectural heat insulating material of the present invention fitted between the joists 102 and 102.

  When the thickness of the plate-like heat insulating material 10 is thin with respect to the height of the joist 102, a support material (not shown) is installed on the large pull 101, and the heat insulating material of the present invention is placed thereon. Can be adjusted. As the support material, a plate material having an appropriate thickness such as a plastic foam, felt, or fiberboard can be used.

  Further, when the building heat insulating material of the present invention is used as a wall heat insulating material, for example, as shown in FIG. 5, the building heat insulating material of the present invention is erected so that the longitudinal direction is a vertical direction, and used as a support member. It fits between the pillar 111 and the stud 112, and between the stud 112 and the stud 112. The back surface of the plate-like heat insulating material 10 is supported by the outer wall 113, and the lower end is supported by the floor material 114.

  Moreover, when using the heat insulating material for buildings of this invention as a heat insulating material for roofs, the both ends of the longitudinal direction are supported on a main roof in the state fitted between the rafters as a supporting member.

(Example 1, Comparative Examples 1-3)
The architectural heat insulating material 1 of FIG. 1 was produced using Styroace (registered trademark) manufactured by Dow Chemical Co., Ltd. The density is 30 kg / m ³ and the average bubble diameter is 0.3 mm. The thickness T of the plate-like heat insulating material 10 was 65 mm, the width was 436 mm, and the width W of the grooves 11a and 11b was set to an optimum value of 1.5 mm. The total width W of each of the grooves 11a and 11b was 8 on each of the front and back surfaces in the range of 10 to 15 mm.

  As Example 1, the interval P between the grooves 11a and 11b was 20 mm, the depth D was 45 mm, and the length C of the overlapping portion of the grooves 11a and 11b was 25 mm. C is 56% of D.

  As Comparative Example 1, the interval P between the grooves 11a and 11b was 20 mm, the depth D was 40 mm, and the length C of the overlapping portion of the grooves 11a and 11b was 15 mm. C is 38% of D.

  As Comparative Example 2, the interval P between the grooves 11a and 11b was 40 mm, the depth D was 45 mm, and the length C of the overlapping portion of the grooves 11a and 11b was 25 mm. C is 56% of D.

  As Comparative Example 3, the interval P between the grooves 11a and 11b was 40 mm, the depth D was 40 mm, and the length C of the overlapping portion of the grooves 11a and 11b was 15 mm. C is 38% of D.

  The building heat insulating materials of the above-mentioned examples and comparative examples are inserted between the pillars of the outer wall with a gap of 428 mm narrower than the width of the plate-shaped heat insulating material 10, and the center portion of the surface is pressed flat. did. The total width W of each of the grooves 11a and 11b is 15 mm at the maximum on each of the front surface and the back surface, and is compressed by 8 mm after the heat insulation construction, so the residual ratio of the groove space is (15−8) / 15 = 47. % Was 50% or less.

  In the above heat insulation construction, in Example 1, the plate-like heat insulating material 10 was easily bent, and the surface was not raised even after the heat insulation construction, and was well supported between the pillars and the intermediate pillars. On the other hand, in Comparative Examples 1 and 2, the plate-like heat insulating material 10 was less likely to bend than in Example 1, and Comparative Example 3 was further less likely to bend, both of which were less workable than Example 1.

(Examples 2 and 3)
A plate-like heat insulating material having a thickness of 40 mm, a width of 75 mm, and a length of 300 mm is prepared using the same Styro Ace (registered trademark) as in Example 1, the optimum value of the width W is 1.5 mm, and the finished width W is 1 to 2 mm. Two types of grooves having a depth of 20 mm and a depth of 30 mm were produced for each plate-like heat insulating material so as to fall within the range, and the processing method was changed. As the shape of the grooves, two types of grooves 11a having a substantially circular bottom 11c shown in FIG. 3 as Example 2 and linear grooves 11a having a uniform width shown in FIG. Example 2 was formed by melting with a heated metal wire, and Example 3 was formed by cutting with a circular saw.

  About the heat insulating material of each example, the bending fracture load (N) was measured only about the width direction by the bending test of JIS A 9511. The results are shown in Table 1.

  As shown in Table 1, it can be seen that by making the bottom of the groove substantially circular, the effect of preventing breakage when the plate-like heat insulating material is bent is high.

  1: heat insulating material for building, 10: plate-like heat insulating material, 11, 11a, 11b: groove, 11c: bottom of groove, 20: support member, 101: large draw, 102: joist, 103: floor material, 111: pillar , 112: studs, 113: outer wall, 114: flooring

Claims (3)

A plurality of grooves in the thickness direction of the plate-like heat insulating material in the center region in the width direction of each of the front and back surfaces of the plate-like heat insulating material, with a constant interval of 15 mm to 30 mm in the width direction and the longitudinal direction The groove has a constant width from the opening to the bottom and is not less than 1 mm and not more than 2 mm, and the groove formed on the front surface and the groove formed on the back surface are staggered in the width direction. And it is formed so that 50% or more and 75% or less of the depth of the groove may overlap each other in the thickness direction, the cross section in the width direction of the plate-like heat insulating material is rectangular, and the width of the plate-like heat insulating material is The plate-like heat insulating material is larger than the interval between the support members into which the plate-like heat insulating material is inserted, and the total groove space on the front surface and the back surface after the heat insulating construction is 50% or less before the heat insulating construction. A groove is formed ,
In the cross-section in the width direction of the plate-shaped heat insulating material, the shape of the bottom of the groove is a substantially circular shape having a diameter larger than the width of the opening of the groove, and the inner surface of the bottom has a resin film formed by heat melting. Thermal insulation for buildings characterized by 2. The building according to claim 1, wherein the plate-like heat insulating material is an extruded foamed polystyrene plate having a thickness of 40 mm or more, a density of 28 kg / m ³ or more, and an average cell diameter of 0.4 mm or less. Insulation. Inserting between a pair of support members arranged in parallel with a gap narrower than the width of the architectural heat insulating material while bending the architectural heat insulating material according to claim 1 or 2 in the width direction, and then bending The heat insulation construction method characterized by returning the said heat insulating material for buildings to flatness.

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