JP6250363B2 - Rainwater drain insulation board for floor - Google Patents

Description

  The present invention relates to a rainwater drainage insulation board for floors, and more particularly to a rainwater drainage insulation board for floors that can be suitably used for thermal insulation construction of a floor portion of a building assembled by a platform method.

  Conventionally, in order to improve the heat insulation of a floor portion of a building, a heat insulating plate made of a resin foam is laid between horizontal members of a floor base, and a floor plate is pasted thereon. And in the construction method that requires the floor to be finished before finishing the roof, such as the platform method, if it rains before the floor plate is applied after laying the heat insulation plate, A puddle will form.

  When a puddle is generated in this way, it is necessary to wipe off the water on the upper surface of the heat insulating plate with a mop or the like before the floor plate is attached, resulting in a decrease in construction efficiency.

  In order to solve the above problem, there has been known an improvement made to the structure of the heat insulating plate so that rainwater does not collect on the upper surface of the heat insulating plate. For example, in Patent Document 1, an inclined surface is formed inwardly from the upper end of the upper peripheral wall portion of the heat insulating plate, and there is a through hole at the bottom of the inclined surface, and there are a plurality of combinations of the inclined surface and the through hole. The floor insulation provided is described.

Patent No. 4818077

  In the heat insulating plate of Patent Document 1, rainwater is drained from the through hole by the inclined surface even if it rains during the floor construction, and no puddle is formed on the upper surface of the heat insulating plate.

  However, because of the inclined surface of the heat insulating plate, a space is generated between the floor material and the space area of the inclined surface is large, and the inclined surface space and the under floor space communicate with each other. Is concerned. If the slope of the inclined surface is gentle and the number of through holes is small so as to suppress the decrease in heat insulation performance, sufficient drainage will not be performed.

  In view of the above problems, the present invention provides a rainwater drainage insulation board for floors that can exhibit sufficient drainage capacity without causing deterioration in thermal insulation performance, and is advantageous in terms of manufacturing with a relatively simple structure. The task is to do.

The present invention is a floor insulation plate attached between adjacent horizontal members of the floor foundation,
It has a plurality of drainage grooves on the surface of a smooth heat insulating plate having a constant thickness, the drainage groove has a groove width of 1 to 3 mm, and is inclined from one end of the heat insulating plate surface to the other end of the back surface. Formed,
A rainwater drainage heat insulating plate for floors, characterized in that a water outlet leading to the underfloor space is formed at an end of the drainage groove on the back surface of the heat insulating plate.

  According to the present invention, since the structure of the heat insulating plate body is simple and does not create a space between the floor base material and the drainage groove does not cause a decrease in heat insulating performance, both ease of manufacture and heat insulating performance are achieved. Are better.

It is explanatory drawing of the aspect of the drain groove formed in the heat insulation board of this invention. It is explanatory drawing of another aspect of the drain groove formed in the heat insulation board of this invention. It is explanatory drawing of the heat insulating board which concerns on Example 1. FIG. It is explanatory drawing of the heat insulation board which concerns on Example 2. FIG. It is explanatory drawing of the heat insulation board which concerns on Example 3. FIG.

  As the heat insulating plate of the present invention, a publicly known heat insulating plate that is integrally formed using a foamed synthetic resin such as foamed polystyrene can be used except for the formation of drainage grooves. In addition, since the flat portion other than the groove is in a smooth state, no space is formed between the floor base material and the heat insulation performance is not deteriorated. Some heat insulating materials are made of glass wool, but are not suitable for the present invention because they easily absorb water and accumulate in the interior, making it difficult to form drainage grooves.

  The drainage groove can be easily formed by pressing the heated nichrome wire against a predetermined position of the heat insulating plate, similarly to the polystyrene cutter used for cutting the foamed polystyrene.

  In order to guide water from the surface of the heat insulating plate to the back surface, the drainage groove is inclined from one end on the front surface side toward the other end on the back surface side. And it forms so that the edge part of the drainage ditch on the back side may lead to the underfloor space, and the part becomes a water outlet.

  Although the heat insulating material of this invention is attached between horizontal members comprised from what is called a draw, etc., a well-known thing can be used for a horizontal member and it does not specifically limit.

  1 and 2 show a basic formation pattern of drainage grooves in the heat insulating plate of the present invention. Although not limited to what is shown in the figure, in any case, eight drain grooves 1 are provided. Among these, in FIG. 1, all the drain grooves 1 have the same inclination and the same water flow direction, and the water outlet 2 on the back surface of the heat insulating plate is formed only on one side of the heat insulating plate. In FIG. 2, the drain grooves 1 are alternately inclined so that the water flow directions are alternate, and the water outlets 2 on the back surface of the heat insulating plate are formed on both sides of the heat insulating plate.

  The drainage groove 1 preferably has a width of about 1 to 3 mm, and the thickness of the nichrome wire used for drainage groove formation may be appropriately selected. If the width is narrower than the above, the drainage capacity tends to be insufficient, and if it is wider than the above, the heat insulating performance tends to be lowered.

  A plurality of drain grooves 1 are formed on the surface of the heat insulating plate, and the distance between adjacent drain grooves is preferably about 5 to 20 cm.

  The length of the water outlet 2 is not particularly limited, but is preferably about 5 to 15 cm with respect to the length of the heat insulating plate.

  It should be noted that the surface flat portion of the heat insulating plate is made more hydrophilic by imparting water repellency by applying a skin layer or a water repellent and making the surface of the drainage groove fluffy so as to have hydrophilicity. It is also possible to induce rainwater into the drain.

  Hereinafter, although the structure and effect of this invention are demonstrated by a specific Example, this invention is not limited to these Examples.

(Drainage test 1)
The heat insulating plate of the material and size shown in Table 1 is formed with drainage grooves by hot wire processing. The sample of the embodiment shown in FIG. 3 with eight drainage grooves is shown in Example 1, and the number of grooves is six. The sample of the embodiment of 4 was referred to as Example 2, and the sample of the embodiment of FIG.

  A commercially available product (equivalent to the invention of Patent Document 1) was used as Comparative Example 1 for comparison with the present invention.

Condition 1:
After each sample of 850 mm × 850 mm was placed flat through a spacer, 640 g / sheet was sprinkled with a watering can from the top, and after standing for 1 hour, the amount of water remaining on the heat insulating material was measured by weighing. . The results are shown in Table 2.

  In Comparative Example 1, the slope is very gentle and the drainage groove is only one (only the central 5 mmφ), so it is estimated that the amount of drainage is small.

Condition 2:
Each sample of 850 mm x 850 mm is put in a wooden frame that assumes a large draw, watering 640 g / sheet with a watering can from the top, and after standing for 5 hours, measure the amount of water remaining on the insulation did. The results are shown in Table 3.

  In Comparative Example 1, water remained in the recess.

1: drainage channel, 2: water outlet

Claims (2)

A heat insulating plate for floors installed between adjacent horizontal members of the floor base,
It has a plurality of drainage grooves on the surface of a smooth heat insulating plate having a constant thickness, the drainage groove has a groove width of 1 to 3 mm, and is inclined from one end of the heat insulating plate surface to the other end of the back surface. Formed,
A rainwater drainage heat insulating plate for floors, wherein a water drop leading to the underfloor space is formed at an end of the drainage groove on the back surface of the heat insulating plate. 2. The rainwater drainage heat insulating plate for floor according to claim 1 , wherein a distance between adjacent drain grooves formed in the plurality of lines is 5 to 20 cm, and a length of the water drop is 5 to 15 cm .

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