JP4071393B2 - Blowing insulation method for residential walls and shelf members used in the method - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a technique for blowing a heat insulating material into a house wall by air, and more particularly to a method for preventing settling of a heat insulating layer.
[0002]
[Prior art]
Conventionally, as a technology for arranging a heat insulation layer between the outer wall and the inner wall of a house, heat insulation fibers (or a lump of them) made of glass wool or cellulosic fiber material are blown into the wall by an air flow, and constant There is a method of forming a heat insulation layer.
[0003]
FIG. 4 shows an example of such a construction method. Reference numeral 1 is a base of a house, 2 is a beam, 3 is a column, 4 is an intermediary column, 5 is a brace, 6 is a wall backboard, and an air vent net 17 on the indoor side. A heat insulating material processed into a fiber or lump is blown in between the back plate 6 and the air vent net 17 on the indoor side depending on the amount of air.
[0004]
FIG. 5 is an enlarged view of a part of a wall portion related to construction. The space inside the wall between the back plate 6 on the outer wall side and the air vent net 17 on the indoor side is defined in the left-right direction by the columns 3 and the inter-columns 4, and the blown heat insulating material is the columns 3 (inter-columns). 4) restricts left and right movements. The air vent net 17 is provided with an opening 18 for a blow hose cut in a cross shape, for example. In this example, the openings 18 are provided at, for example, three upper and lower stages at appropriate intervals.
[0005]
At the time of construction, heat insulating material is blown up with a hose in order from the lower opening 18-1, and the hose is inverted upward at the uppermost opening 18-3 so that the heat insulating material is filled as evenly as possible. To. Then, the air vent net 17 whose surface is bumpy due to the blowing of the heat insulating material is smoothed and finished.
[0006]
[Problems to be solved by the invention]
By the way, the heat insulating layer of the wall by such a construction method has a problem that the heat insulating performance and the sound insulating performance are remarkably lowered by the settling (sinking) of the heat insulating material after construction.
[0007]
The basic problem is that of the insulation used in the blow insulation method. As the heat insulating material, for example, an inorganic fiber mat having an average fiber diameter of 7 to 8 μm is crushed with a meal hammer or the like to form an indeterminate lump or a resin / cellulosic fiber material. The material itself is relatively heavy for reasons such as required, and even if it is blown with air, the fiber density tends to vary. For this reason, variation in heat insulation performance and sound absorption performance (sound insulation performance) occurs immediately after construction.
[0008]
Natural sedimentation due to the weight of the insulating fibers is also a problem. Moreover, according to vibration experiments, it is known that sedimentation of, for example, 400 to 1000 mm may be exhibited in about 96 hours after the construction, and there are not a few cases in which the heat insulating property and the sound insulating property are greatly impaired. Since the sedimentation speed proceeds according to the amplitude, it is highly likely that the sedimentation speed will be further accelerated in addition to the natural dead-weight sedimentation in locations with a lot of traffic and in the vicinity of factories that are susceptible to minute vibration.
[0009]
Therefore, in order to solve the problem of sedimentation, there is an improvement technique in which an inorganic heat insulating material or a lump thereof is blown into the wall simultaneously with the water-based resin binder, and the heat insulating materials are bonded and fixed to prevent sedimentation. However, since it takes several days to dry the binder, the construction period of the inner wall construction becomes long, and if the interior is erected in an undried state quickly, a new problem arises that mold and odor are generated. In cold regions, the water-based resin bainter freezes after construction and moisture does not evaporate, so there is a construction limit that prevents construction in winter.
[0010]
It seems that these problems can be solved temporarily by improving the insulation. For example, in Japanese Patent Laid-Open No. 55-23098, a glass-like mat is cut into a columnar body and settling is prevented by using a lump of the same shape. In Japanese Patent Laid-Open No. 8-19370, high-performance glass wool is cubic. A technology has been disclosed that suppresses dispersion in density when air is blown and prevents sedimentation without using a resin-based binder by forming a fiber having a constant particle size into a fiber as a heat insulating material. .
[0011]
Certainly, by using a block having a constant particle size, the density variation is minimized, and the sedimentation rate is also reduced. However, the gaps between the fiber materials still remain, and the housing is exposed to various vibrations in urban areas and suburban areas such as vehicle vibrations, vibrations from various factories, or natural phenomena such as earthquakes. Therefore, it is difficult to prevent the settling of the heat insulating material due to the environment to be sufficiently prevented only by improving the processing of the material shape. Moreover, when using a lump with a fixed particle size, the material cost increases, which may impair the reduction of construction costs and the securing of profits.
[0012]
Therefore, an object of the present invention is to suppress variation in the density of the heat insulating layer formed inside the wall regardless of the type of heat insulating material to be used, and to prevent deterioration due to settling of the heat insulating material to a minimum.
[0013]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the heat insulation method for blowing a house wall according to the present invention is a heat insulation method in which a heat insulation material is blown into the wall between a wall back plate of a house and an air vent net provided on the indoor side by air. As a technical premise, a shelf member extending in the left-right direction with a predetermined interval in the vertical direction is fixed to the wall backboard, and the shelf member has a predetermined shape using a resin material having heat insulation and fire resistance. And the amount of protrusion of the shelf member from the wall back plate is at least 40% and at most 90% of the width inside the wall. The shelf member may be formed into a prismatic shape with the same or the same type of heat insulating material as that blown by air.
[0014]
[Action]
In order to prevent the heat insulating material blown by the air from sinking, the blow insulation method according to the present invention is arranged with a shelf member at a predetermined position of the back plate constituting the housing wall, and the shelf member that protrudes and exists, Disperses and reduces the weight of the heat insulating material that fills the walls, preventing sedimentation deterioration due to its own weight and vibration.
[0015]
As a general example, the space inside the wall defined by the pillars and the studs is further divided vertically by shelf members arranged at a predetermined distance in the vertical direction, and the insulating material that enters each divided area. The weight is shared and received by each shelf member. After all, the settling (sinking) of the heat insulating material due to vibration is the action that the weight of the heat insulating material itself tries to reduce the porosity of the heat insulating material itself. The speed of the settling motion is surely reduced.
[0016]
On the other hand, as an actual problem during construction, when air is blown out along with the air flow from the hose insertion opening provided in the air vent net, if the air does not escape from the mesh (knitting opening) of the entire air vent net, The amount of air and the amount of released air cannot be balanced. That is, even if each area is dispersed small, if the functional area of the air vent net is reduced, smooth construction work cannot be performed. Therefore, in the present invention, the rising dimension (projection amount) of the shelf member is 40% to 90% of the width inside the wall, and in any case, by creating a certain gap between the shelf member and the air vent net, The blown air can escape freely from any part of the air vent net beyond the shelf members. That is, the shelf member protrudes only from the air vent net to a position where a certain gap is maintained, and allows free release of blown air. Thereby, the density of the heat insulating material at the time of blowing work can be kept substantially uniform in a small divided area defined in the vertical direction. If the protruding amount of the shelf member is 40% or less, the purpose of reducing the weight of the heat insulating material cannot be sufficiently achieved, and if the protruding amount is 90% or more, the air release amount is limited, resulting in construction problems. . Most preferably, the protrusion amount is set to about 50 to 75% of the wall inner width.
[0017]
Moreover, in order to ensure heat insulation and fire resistance, it is desirable to mold the shelf member with the same or similar material as the heat insulating material blown into the wall. This is because the heat insulation and sound insulation effect do not vary depending on the position where the shelf member is provided. However, since the material density differs between the heat insulating material blown by air and the shelf member, it may be molded using a lightweight member that is cheaper and easy to handle. Wood board is good as a material for reducing the weight of the heat insulating material, but handling such as fixing work becomes complicated. The surface shape, bottom surface shape, and side surface shape are free, but the amount of protrusion and the thickness (vertical dimension) that can reduce the weight of the loaded heat insulating material are secured. As long as the weight of the heat insulating material can be reduced and distributed, a slight gap may be formed on the left and right sides of the shelf member, and a small hole penetrating the bottom surface from the top surface of the shelf member may be provided. This is a matter that can be appropriately designed in correlation with the air venting efficiency.
[0018]
【Example】
FIGS. 1-3 shows the example of arrangement | positioning of the shelf member used for the blowing heat insulation construction which concerns on this invention. 31 is a back plate on the outer wall side of the house, 32 is a base, 33 is a beam, 34 and 35 are pillars, 36 is a pillar, and the back plate 31 has, for example, three corners extending vertically in the vertical direction of the wall. A columnar shelf member 40 is provided. An air vent net 37 is provided on the surface (inside the room), and a cross-shaped hose layer opening 38 is provided at an appropriate location. In FIG. 1, the air vent net is omitted.
[0019]
The shelf member 40 protrudes from the surface (inner side surface) of the back plate 31 to a predetermined dimension, for example, about 5 to 10 cm, toward the air vent net 37 and has a certain gap (for example, 2 to 2) between the air vent net 37. 5 cm). The shelf member 40 is preliminarily processed and molded, for example, into a prismatic shape, and is attached to the back plate 31 via screws or other fixing means at the time of construction. An adhesive may be used.
[0020]
Therefore, if such a shelf member 40 is arranged, for example, as shown in FIG. 3, when the heat insulating material is blown together with the air from the opening 38, the air is connected to the shelf member front end portion 40F and the air as shown by an arrow A in the figure. It passes through the clearance S between the air outlet net 37R and freely escapes upward or downward to be released to the outside from the entire air outlet net 37. As a result, even if the shelf member 40 is provided, the construction work can be performed without impairing the conventional workability.
[0021]
In addition, as a result of the blowing region being divided into small parts in the vertical direction by the shelf member 40, it becomes easy to achieve uniform and uniform blowing amount regardless of skill, and the heat insulation and sound insulation quality of the housing wall portion can be improved more than the conventional heat insulation wall. It becomes possible.
[0022]
On the other hand, after construction, the shelf member 40 divides and accepts the weight of the heat insulating material 48 for each divided region existing in the vertical direction. As a result, the weight applied to the lowermost layer portion D of each divided region is reduced to a certain weight or less, and the function of the weight for reducing the porosity of the portion can be surely reduced. That is, by reducing the size of the region in the vertical direction, the settling action of each divided region can be further suppressed, aging can be prevented for at least several years, and the problems of conventional blow-insulation construction are eliminated. Of course, there is a possibility that the subsidence action may proceed little by little due to various vibrations applied to the house. However, according to the present invention, it is expected that the traveling speed can be suppressed to the limit. In addition, when used in combination with a block of heat-insulating material that has been processed to a constant particle size, it is possible to stop sedimentation almost certainly more than when normal fiber materials are blown, ensuring excellent heat insulation and sound insulation over a long period of time. It becomes possible.
[0023]
It is sufficient that the number of shelves 40 to be attached is about three steps in the upper and lower directions, but a larger number may be provided. Moreover, the number of arrangement | positioning may differ between right and left of a pillar or a stud. In addition, it is desirable that the vertical separation width of the shelf member 40 is constant, but the vertical separation dimension may be changed as necessary. Further, in the gap S between the shelf member front end portion 40F and the air vent net back surface 37R, a member for dispersing the weight of the portion, for example, a metal or resin mesh member may be disposed. Since this gap S is for free release of air during the air blowing operation, it has a structure with excellent air permeability and can receive the weight of the heat insulating material acting downward from above to some extent. It is desirable to use a simple member that can be easily inserted into and fixed to the shelf member 40 as long as it has sufficient rigidity and area.
[0024]
【The invention's effect】
As described above, according to the blown insulation method for a residential wall according to the present invention, it is possible to equalize the density at the time of blowing work and minimize the settling of the heat insulation material regardless of the type of heat insulation material. .
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of a blow insulation method according to the present invention.
FIG. 2 is a front view showing an example of a blow insulation method according to the present invention.
FIG. 3 is a cross-sectional side view illustrating an air flow in the blown insulation method according to the invention.
FIG. 4 is a diagram illustrating the principle of a conventional blow insulation method.
FIG. 5 is an enlarged view illustrating a wall structure according to a conventional blow insulation method.
[Explanation of symbols]
31 Back plate 32 Base 33 Beams 34 and 35 Column 36 Spacer 37 Air vent net 37R Air vent net back surface 40 Shelf member 40F Shelf member tip S

Claims (2)

It is a heat insulation method that blows the heat insulating material into the wall between the wall back plate of the house and the air vent net provided on the indoor side by air,
A shelf member extending in the left-right direction with a predetermined interval in the vertical direction is fixed to the wall backboard, and the shelf member is processed and molded into a predetermined shape using a resin material having heat insulation and fire resistance. In addition, the amount of protrusion of the shelf member from the wall back plate is set to at least 40% or more and 90% or less of the width inside the wall. The shelf member used in the blown insulation method for a residential wall according to claim 1, wherein the shelf member is formed into a prismatic shape with a heat insulating material that is the same as or similar to the heat insulating material blown by air.

Images