JP2010101146A - Wall thermal insulation construction method and apparatus for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve reduction of construction cost and reduction of construction time, prevent a construction site from being fouled and make improvement in terms of a risk of health problems without using an air-permeable net when a thermal insulation material is blown in a wall thermal insulation blowing method. <P>SOLUTION: In the wall thermal insulation blowing method, a combined device for pressuring-feeding the thermal insulation material and discharging air inside a thermal insulation layer is used when the thermal insulation material 12 is filled in a space 9 formed by an inner and outer walls 3, 4; and the thermal insulation layer is highly densely filled and the air inside the thermal insulation layer is discharged by a convection current produced by wind pressure caused by blowing filling. A filter 16 is installed to a discharge section of the device. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a construction technique and apparatus related to a wall heat insulation construction method (hereinafter referred to as a blowing method), and the conventional blowing method constructs and constructs a breathable net without using a net. The present invention relates to a construction method and a device that enables the construction method.

Technology background

Conventionally, the blowing method in the wall insulation, regardless of whether it is newly installed or existing, has a breathable member (hereinafter referred to as a breathable net) stretched over the whole or part of one side of the wall, and there is a gap between the opposite wall. A method of filling a heat insulating material into a heat insulating layer gap using a blowing apparatus after constructing (hereinafter referred to as a heat insulating layer gap) has been common. The reason why the air-permeable net is stretched is to prevent the heat insulating material from leaking to the outside because it is necessary to release the wind pressure to the outside because of the wind pressure feeding method when filling the heat insulating material. That is, since the conventional method is a method of feeding and filling the heat insulation layer gap by the wind pressure of the blowing device, if the wind pressure is not excluded from the inside of the heat insulation layer, continuous filling cannot be performed by increasing the internal pressure. Met. Therefore, it is necessary to construct a ventilation surface portion by a breathable net or the like on one side at the time of forming the heat insulating layer gap before the filling process, and it is indispensable even though the breathable net stretching work is extremely complicated. This is even more problematic when the insulation wall is filled or additionally filled in the existing building wall rather than a new building, unless one side wall is damaged and a breathable net is stretched to fill the insulation material. This means that it is impossible to do so, and it is not necessary at all after completion of the filling, and it is necessary to reconstruct the wall after the completion of the main filling work process, which causes an increase in expenses. This means that the conventional method requires a step of attaching a breathable net and reconstructing the wall in the wall insulation construction of a newly established or existing building structure, and has been a wasteful work. In addition, breathable nets have the drawback of allowing fine heat-insulating fibers to pass through and release simultaneously with exhaust, and breathable nets are generally stretched over the entire surface, and wind pressure is released from the entire surface of the breathable net. However, it is impossible to remove fine fibers in a concentrated manner, and it has the disadvantages that need to be solved, such as not contaminating the site, managing the health of workers, and preventing scattering of fine fibers. Thus, the conventional method includes problems that must be improved, and the present inventor has eagerly solved this problem in consideration of these backgrounds.
“Nippon Jitsugyo Shuppan Co., Ltd. All of heat insulation 2008.2.1” “Nippon Jitsugyo Publishing, Inc. Wooden Architecture 2008 / 1.15” "Ohm Air Conditioning Equipment 2008/2/20"

The present inventor considered the drawbacks of the conventional filling method and set the following points as problems to be solved.
It was an object of the present invention to provide an inexpensive wall insulation method for newly constructed and existing building structures by the invention of a construction method that does not use a breathable net and an apparatus that enables it. In other words, after the outer wall and inner wall are constructed or both walls are already installed, the heat insulating layer gap is used to directly fill the gap, and the inner and outer walls are constructed as an interface with the outside, and the gap is formed as a heat insulating material. It is a construction method for filling voids. Therefore, it is a construction method that eliminates the need for a breathable net regardless of whether it is a new construction or an existing building, thereby reducing construction costs, shortening construction time, preventing contamination of construction sites and the risk of health problems. Was an issue. Furthermore, the present inventor also found out that the air flow (convection) is important when feeding the heat insulating material in the heat insulating layer gap, and that a blowing device that enables high density filling is also necessary, At the same time, providing an apparatus capable of solving the problem was also an issue.

Means for Solving the Invention

The invention's effect

The effects of the present invention are as follows.
(1) This construction method is a new building and existing building wall insulation blowing method, where the insulation is blown and filled with the outer wall and the inner wall, and a breathable net is installed as in the conventional method. As mentioned above, it is not a structure that excludes air pressure to the outside, but a blowing method in which the air gap is filled by wall construction. According to this blowing, there is no need to construct a heat-insulating layer gap by stretching a conventional air-permeable net, eliminating the net and installation costs, labor costs, wall demolition costs, waste material disposal costs, etc. Cost savings are significant.
(2) The present method is characterized in that it can be widely used for wall insulation construction of new or existing buildings. In particular, there is a merit that blowing can be performed even when there are non-movable members such as columns, studs, and wiring in the wall structure in the heat insulating material filling of an existing building. That is, since it is a blow-filling system using convection of air, it has a feature that it can be filled to every corner. In the conventional method, since air is excluded from the entire surface of the air-permeable net, the internal pressure escapes to the outside in a non-uniform manner, and there is a defect that a part cannot be filled. This construction method and apparatus can freely stretch the internal pressure at the time of filling, and can freely change pressurization and decompression. This means that the filling conditions can be investigated regardless of whether the density is low or high.
(3) In the wall of highly heat-insulated and airtight building structures, which is a trend of recent housing construction, the filling thickness or filling density (the amount of blowing per unit of heat insulating material) is regarded as important, and the heat insulating layer thickness is increased. The desire to do is increasing. In this case, in the net system, there is a limit to the net holding, and the wall construction after the heat insulation construction often causes bulging to the outside due to the internal pressure. In this construction method, the pressure strength due to the wall can be easily exhibited, so that it is possible to prevent a wall bulge accident during and after the construction.
(4) Therefore, the constructed heat insulation layer is stable, integrated with the wall, can eliminate the cause of subsidence due to self-sink or vibration over time, and prevent the generation of voids due to the bulging of the breathable net. I can do it. By the way, the voids generated after construction, which frequently occurred in the conventional method, are due to low specific gravity, filling unevenness, and self-settlement due to vibration. It is a void (referred to as an avalanche phenomenon) generated inside the layer, and this was the biggest factor that extremely deteriorated the heat insulation performance due to air movement, that is, heat movement due to temperature difference in the heat insulation layer. It is extremely important not to generate this void, and the present technology has solved this serious problem.
(5) The above improvement, that is, a method of filling with high density using the convection when filling the space in the heat insulation layer using the wall, has been developed in order to exhibit its sufficient filling effect Inventor also invented. The apparatus is a composite apparatus having both the ability to pressurize and supply the heat insulating material from the outside and discharge the air in the heat insulating layer to the outside of the apparatus. However, it is possible to perform exhaust by constructing one or more exhaust ports on the wall separately from the apparatus. In that case, since fine fibers are contained in the exhaust gas, it is preferable to consider the elimination thereof.
(6) In this way, if the filter is attached to the exhaust section of the device, the fine fibers that have conventionally passed through the breathable net and scattered in the building can be controlled. It was possible to prevent scattering and to prevent the occurrence of health problems such as asthma and the development of allergies.
(7) The combined use with plate-like or roll-like products such as generally used plate-like heat insulating materials such as foamed polystyrene, foamed urethane, glass fiber, rock wool, etc. has become possible. That is, it is possible to construct a high-performance wall composed of a composite heat insulating layer by using these heat insulating materials for part or all of the wall material regardless of non-breathability and blowing the heat insulating material into the gap.

The best mode for carrying out the present invention will be described with reference to FIG. 1 and FIG.
The present invention is a method in which a heat insulating material is blown and filled into the space of the heat insulating layer using inner and outer walls, and is a method characterized in that it can be constructed without stretching a breathable net as in the conventional method. As shown in FIG. 1- (a), a heat insulating material filling space (9) is constructed between the inner and outer walls (3) and (4). One of the inner and outer walls (3) and (4) is drilled with a circular hole for inserting the tip of the heat insulating material feeding pipe (1) linked with the blowing device for feeding and filling the heat insulating material. Generally, the outer wall is perforated, but the perforation method may be employed as long as it does not cause a problem such as cracking in the wall during perforation, although it depends on the material of the wall. The heat insulating material supply pipe (1) is a lightweight pipe made of polyethylene or the like. However, since there is a risk that a stress load is applied to the wall during the heat insulating material supply, the heat insulating material supply exhaust pipe fixing bracket (7 ). The insulation material supply / exhaust pipe fixing bracket (7) is preferably removed after the insulation material is filled, and the fixing method is preferably easy to work. For example, it is fixed to the wall with a simple screw. Those that can be removed immediately after completion of construction are preferred. It is preferable to create a heat-insulating-filling flow (11) so that the wind from the heat-insulating material feeding pipe (1) hits the opposite wall, and for this purpose, the tip of the heat-insulating material feeding pipe (1) is as shown in the figure. It is preferable that it is semicircular. (A), (b), and (c) of FIG. 1 show the blowing filling state step by step. The heat insulating material filling operation is carried out by wind pressure and deposited from the bottom of the heat insulating layer filling void (9) by its own weight. Since the density depends on the wind pressure at the time of feeding, it is important to adjust the wind pressure of the blowing device. According to this method, the wind pressure can be easily adjusted and the heat insulating layer density can be easily adjusted. The exhausted air flow (13) returns to the near side as a convection, which includes fine fibers that could not be deposited. FIG. 1- (c) shows the state in which the filling process has progressed, but the final filling operation is completed by changing the heat-insulating material supply port upward and filling. Finally, the pipe is removed from the wall, the fixing bracket is detached, the perforated part is sealed, and the filling operation is completed. The inventor removed the exhaust gas and fine fibers through a filter (25) attached to the air outlet (8), a bag filter (16) installed outside, or a combination thereof. (8) The exhaust gas that has passed through the air discharge port is discharged to the outside as purified air after removing fine fibers via a filter. The hole after the construction can be easily repaired with an adhesive or the like on the cut wall material. [FIG. 2] is a cross-sectional view of the heat-insulating material feeding and exhausting device section. The heat-insulating feeding pipe (1), the heat-insulating material feeding port (2), the air discharge port (8), and the exhausting device fixing bracket (7). , The filter (25), and the bag filter connection pipe (15). In this way, the present invention is not a heat insulation layer construction method using a breathable net that has been performed in the conventional construction method, but adopts a high-strength wall as a component for forming a filling space, and a construction method that can be applied under that condition And the rear and device that makes it possible.

In order to prove that the air flow during the blowing of this method is effective for the blowing method, an insulation blowing hole was constructed and an actual blowing experiment was conducted. The apparatus is shown in FIG. 4 as a perspective view of a filling test apparatus.
[FIG. 4] is an apparatus similar to a residential heat insulation construction having a width of 100 cm, a depth of 20 cm, and a height of 2600 cm. The lateral plate (17) and the back plate (26) on both sides are composed of a hard 9mm structural plywood, and a hole for inserting the heat-insulating material feeding pipe (1) is drilled in the upper part of the back plate (26). It is. A transparent acrylic plate (19) is temporarily provided on the surface so that air inside does not leak to the outside. In carrying out this test, rock wool blowing raw cotton was used, and filling work was started with a filling density of 70 ± 5 kg / m ³ as a target. The method was constructed according to the construction method shown in FIG. The heat insulating layer filled after the construction was divided into three parts (22) a lower measurement test part, (23) a middle measurement test part, and (24) an upper measurement test part, and the packing density was measured. Furthermore, a conventional method using a breathable net instead of an acrylic plate was also performed, and density comparison was made to confirm that the original purpose was achieved. The results are shown in Table 1.
As a result, it was confirmed that the effects of the present method and the apparatus could solve the conventional problems.

Hereinafter, examples will be described, but the present invention is not limited to the following examples as long as it does not exceed the gist thereof.
In order to confirm that the present invention is extremely effective, construction was carried out in an actual building, and the confirmation was made. In this construction, to confirm the result, the inner wall board was peeled off after the work was completed, and it was confirmed whether the heat insulating material was sufficiently filled in the space of the heat insulating layer.
The outer wall of a newly built detached house with a floor area of 32 tsubo (hereinafter referred to as structural plywood) has been constructed, and a breathable nylon net is stretched over the entire surface of the pillars, studs, etc. Fixed. In this way, a heat-insulating material-filled gap having a thickness of 100 mm was formed. This heat insulating material filling space is a space of 2700 mm in height, and is formed on the entire wall surface so as to cover the entire surface of the house. If the heat insulating material is not filled and constructed so that there is no difference in density in the voids, the heat insulating performance is greatly reduced. In this example, a rock wool material manufactured by Nippon Rock Wool Co., Ltd. was used as the lump / particulate heat insulating material, and the blowing device used in the development of the sound heat environment was used as the blowing device. The outer wall structure plywood side was perforated for inserting the heat insulating material feeding pipe of the present invention, and a device was set in the hole, and blowing toward the gypsum board side was started. The blowing air pressure is omitted because it varies depending on the construction site. After all the construction was completed, the fixed gypsum board was removed, and the state of filling of the heat insulating material retained in the shape of the breathable net was confirmed using a pressure measuring device. As a result, the resistance pressure was substantially constant regardless of the floor proximity part, the intermediate part, and the uppermost part, and the error could be stopped within 5%. In the case of the conventional method, an error of 10% to 15% occurs, but this method is effective in forming a high-temperature insulation layer by improving the filling method and blowing device from the conventional breathable net method. certified.
The work amount reduction by this method required two workers (2 man-hours) in the conventional method, but in this method, it was completed in one man-hour and made it possible to halve the target work amount. Furthermore, there was no scattering of the heat insulating material fine fiber at the work site, and the effect was clear.

Cross-sectional views (a), (b), (c) according to the heat-insulating material filling stage Insulation material supply and exhaust system cross-sectional view Fig. 3, A-B cross section Filling test equipment perspective view

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Insulation material supply pipe 2 Insulation material supply port 3 Inner wall 4 Outer wall 5 Ceiling part 6 Internal air external transfer port 7 Fixing fixture 8 Air discharge port 9 Insulation material filling space 10 Insulation material supply flow 11 Insulation material supply flow 12 Insulation Material 13 Exhaust air flow 14 Bag filter transfer flow 15 Bag filter transfer pipe 16 Bag filter 17 Purified air outlet 18 Wood horizontal plate 19 Transparent acrylic resin plate 20 Bottom plate 21 Cut boundary 22 Lower measurement test portion 23 Middle measurement test portion 24 Upper Measurement test section 25 Nozzle filter 26 Exhaust passage gap 27 Exhaust leakage prevention plate 28 Net-like fixed plate

Claims (2)

A construction method in which an inner wall and an outer wall are used as partition walls, and a heat insulating material filling space is constructed by both walls, and the heat insulating material is filled without using a breathable net as in the conventional method. [Claim 1] A heat insulating material filling apparatus which can be fixedly installed on a wall and can be removed after completion of construction with respect to heat insulating material filling.

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