JP2001003469A - Blow insulating method for dwelling house wall part and shelf member used for the method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress aged deterioration accompanied by the sink of an insulating material by making uniform the density of the insulating material irrespective of the types of insulating materials. SOLUTION: A shelf member 40 extending in lateral direction is fixed, with a specified distance provided in vertical direction, to a rear plate 31 of a dwelling house wall part. The shelf member 40 is formed using a light-weight resin material with high thermal insulation desirably, the same or same type of resin material as the insulating material blown by air. The dimension projected from the wall rear plate 31 is set at 40 to 90%, desirably, 50 to 75% of a wall inner part width. The shelf member 40 is desirably formed in a prismatical shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for blowing a heat insulating material into a house wall with air, and more particularly to a method for preventing a heat insulating layer from settling.

[0002]

2. Description of the Related Art As a technique for disposing a heat insulating layer between an outer wall and an inner wall of a house, a heat insulating fiber (or a mass thereof) made of glass wool or a cellulosic fiber material has been blown into the inside of the wall by an air flow. There is a method of forming a certain heat insulating layer there.

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 pillar, 4 is a stud, 5 is a brace, 6 is a wall back plate, and an air vent net 17 is provided on the indoor side.
Then, a fibrous or lump-shaped heat insulating material is blown between the back plate 6 and the air venting net 17 on the indoor side by the amount of air.

FIG. 5 is an enlarged view showing a part of a wall related to construction. The space inside the wall between the back plate 6 on the outer wall side and the air venting net 17 on the indoor side is defined in the left and right directions by the pillars 3 and the studs 4. 4) restricts the movement to the left and right. The air bleeding 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 appropriate intervals, for example, in three upper and lower stages.

At the time of construction, a heat insulating material is blown upward with a hose in order from the lower opening 18-1, and the uppermost opening 18-1 is opened.
In the case of -3, the heat insulating material is filled evenly and uniformly as much as possible by inverting the hose upward or the like. Then, the air bleeding net 17 whose surface is roughened by blowing the heat insulating material is leveled and finished.

[0006]

By the way, the heat insulating layer of a wall formed by such a method has a problem that the heat insulating performance and the sound insulating performance are remarkably reduced due to the sedimentation (settling) of the heat insulating material after construction.

[0007] The basic problem is that of the heat insulating material used in the blow-insulation method. As the heat insulating material, for example, a material obtained by crushing an inorganic fiber mat having an average fiber diameter of 7 to 8 μm with a meal hammer or the like to form an irregular mass or a resin-based / cellulose-based fiber material is used. The material itself is relatively heavy for reasons such as required, and the fiber density tends to vary even when blown by air. For this reason, the heat insulation performance and the sound absorption performance (sound insulation performance) vary immediately after construction.

[0008] Natural settling due to the weight of the insulating fibers is also a problem. In addition, according to the vibration experiment, it is known that the sedimentation of, for example, 400 to 1000 mm may be exhibited in about 96 hours after the construction, and that the heat insulating property and the sound insulating property are greatly impaired in many cases. Since the sedimentation speed advances in accordance with the amplitude, it is highly likely that the sedimentation speed will be further increased in locations with heavy traffic and near factory sites where the vehicle is subject to micro-vibration, in addition to the natural gravity sedimentation.

Therefore, in order to solve the problem of sedimentation, there is an improved technique in which an inorganic heat insulating material or a lump thereof is blown into a wall at the same time as an aqueous resin binder, and the heat insulating materials are bonded and fixed to prevent sedimentation. However,
It takes several days to dry the binder, so the construction period of the inner wall is lengthened, and when the interior is laid in an undried state in a hurry, a new problem that mold and odor are generated is caused. Further, in cold regions, there is also a constructional limit that construction is not possible in winter because the water-based resin binder freezes after construction and water does not evaporate.

It seems that these problems can be solved to some extent by improving the heat insulating material. For example, in Japanese Patent Application Laid-Open No. 55-23098, a glassy mat is cut into a columnar body and sedimentation is prevented by using a lump having the same shape. A technology has been disclosed in which, by forming a fiber serving as a heat insulating material into a lump having a constant particle diameter, unevenness in density during air blowing is suppressed, and sedimentation is prevented without using a resin binder. .

Certainly, the use of agglomerates having a constant particle size minimizes the variation in density and reduces the sedimentation velocity. However, the gaps between the fiber materials still remain, and houses are exposed to various types of vibration in urban areas or near to urban areas, such as vehicle vibrations, vibrations generated from various factories, and natural phenomena such as earthquakes. Therefore, it is difficult to sufficiently prevent the sedimentation of the heat insulating material by simply improving the shape of the material. In addition, when a lump having a constant particle size is used, the cost of the material increases, which may reduce the construction cost and impair the freedom of securing profit.

Accordingly, an object of the present invention is to suppress variations in the density of a heat insulating layer formed inside a wall, regardless of the type of heat insulating material used, and to minimize deterioration due to sedimentation of the heat insulating material. is there.

[0013]

In order to achieve the above object, a blow insulation method for a house wall according to the present invention comprises the steps of: providing a heat insulating material by air between a back wall of a house and an air release net provided on the indoor side; On the technical premise of the heat insulation method of blowing into the inside of the wall between the walls, a shelf member extending in the left-right direction is fixed to the wall backboard at a predetermined interval in the vertical direction, and the shelf member has heat insulation and fire resistance. The shelf member is formed into a predetermined shape using a resin material having the same, and the amount of protrusion of the shelf member from the wall back plate is at least 40% or more and at most 90% or less of the width inside the wall. In some cases, the shelf member is formed into a prismatic shape by using the same or the same type of heat insulating material as that blown by air.

[0014]

According to the blow-insulating method of the present invention, a shelf member is arranged at a predetermined position of a back plate constituting a housing wall to prevent sedimentation of the heat-insulated material blown by air, and the shelf protrudes and is provided. The member reduces the weight of the heat insulating material filling the inside of the wall, and prevents sedimentation deterioration due to its own weight and vibration.

In a general example, the space inside the wall defined by the pillars and studs is further divided vertically into smaller portions by shelf members arranged at a predetermined distance in the vertical direction, and enters each divided region. The weight of the heat insulating material is shared and received by each shelf member. Sedimentation (settling) of insulation due to vibration
After all, the weight of the heat insulating material itself is an effect of reducing the porosity of itself, so by reducing the weight, the speed of the sedimentation movement to lower the porosity is surely reduced. Reduce.

On the other hand, as a practical problem at the time of construction, when the heat insulating material is blown out together with the air flow from the hose insertion opening provided in the air venting net, air does not escape from the entire mesh (stitch opening) of the air venting net. Therefore, the balance between the blown air amount and the released air amount cannot be maintained. That is, even if each area is dispersed small, if the functional area of the air bleeding net is reduced, a smooth construction work cannot be performed. Therefore, in the present invention, the rising dimension (projection amount) of the shelf member is set to 40% to 90% of the width of the inside of the wall, and in each case, a constant gap is formed between the shelf member and the air vent net. The blown air can escape freely from any part of the air venting net beyond the shelf member. In other words, the shelf member protrudes only from the air venting net to a position where a certain gap is maintained, allowing free release of the blowing air. As a result, the density of the heat insulating material during the blowing operation can be kept substantially uniform within a small divided area defined in the vertical direction. If the projecting amount of the shelf member is set to 40% or less, the purpose of reducing the weight of the heat insulating material cannot be sufficiently achieved, and if the projecting amount is set to 90% or more, the amount of air release is limited, resulting in construction problems. . Most preferably, the protrusion amount is set to about 50 to 75% of the inner width of the wall.

In order to secure heat insulation and fire resistance, the shelf member is desirably formed of a material of the same or the same type as the heat insulating material blown into the wall. This is because the heat insulating property and the 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 and the shelf member blown by air, molding may be performed using a lightweight member that is cheaper and easier to handle. Although the wooden board is a good material for reducing the weight of the heat insulating material, handling such as fixing work becomes complicated. Surface shape, bottom shape,
Although the side surface shape is free, the protrusion amount and wall thickness (up and down dimensions) that can reduce the weight of the loaded heat insulating material are secured. still,
As long as the weight of the heat insulating material can be reduced and dispersed, a small gap may be formed on the left and right sides of the shelf member, and a small hole penetrating from the top surface to the bottom surface of the shelf member. This is a matter that can be appropriately designed in correlation with the air bleeding efficiency.

[0018]

1 to 3 show examples of the arrangement of shelves used for blow insulation according to the present invention. 31 is a back plate on the outer wall side of the house, 32 is a base, 33 is a beam, 34, 35
Is a pillar, and 36 is a stud. The back plate 31 is provided with, for example, three rectangular pillar-shaped shelf members 40 extending in the vertical direction of the wall at three places. Air bleeding net 37 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.

The shelf member 40 projects from the surface (inside of the room) of the back plate 31 to a predetermined size, for example, about 5 to 10 cm, toward the air release net 37 side.
7, a certain gap (for example, 2 to 5 cm) is secured. The shelf member 40 is preliminarily processed and formed of a lightweight heat-insulating resin into, for example, a prism 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.

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 flows into the shelf member tip portion 40F and the air release net back surface 3 as indicated by an arrow A in the figure.
7R, freely escape upward or downward, and are released from the entire air venting net 37 to the outside. As a result, even if the shelf member 40 is provided, the construction work can be performed without impairing the conventional workability.

Further, as the blowing area is divided into small parts in the vertical direction by the shelf member 40, it is easy to make the blowing amount uniform even without skill, and the heat insulation sound insulation quality of the housing wall can be made higher than that of the conventional heat insulating wall. It is possible to increase.

On the other hand, after the construction, the shelf members 40 are
Is received by sharing the weight of each of the divided areas 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 it is possible to surely reduce the weight function for reducing the porosity of the portion. That is, the sedimentation action of each divided area is further suppressed by reducing the area size in the vertical direction, the aging can be prevented for at least several years, and the difficulty of the conventional blow-insulated construction is eliminated. Of course, there is a possibility that the sedimentation action may proceed little by little due to various vibrations received by the house. However, according to the present invention, it is possible to expect that the progress speed is suppressed to the limit. In addition, if the heat insulating material is used in combination with a lump processed to a certain particle size, sedimentation can be stopped almost certainly more than when ordinary fiber material is blown, and excellent heat insulation and sound insulation are guaranteed for a long time. It becomes possible.

It is sufficient that the number of shelves 40 to be attached is approximately three in the upper and lower stages, but more than three may be provided.
Also, the number of arrangements may be different on the left and right of the pillar or stud. It is desirable that the vertical separation width of the shelf member 40 be constant, but the vertical separation dimension may be changed as necessary. Further, a member for dispersing the weight of the portion, for example, a metal or resin mesh member may be provided in the gap S between the shelf member tip portion 40F and the air vent net back surface 37R. Since this gap S is for free release of air during the air blowing operation, the gap S has a structure excellent in air permeability, and can receive the weight of the heat insulating material acting from the upper side to the lower side to some extent. It is desirable to use a simple member that can be easily inserted and fixed to the shelf member 40 as long as it has a sufficient rigidity and area.

[0024]

As described above, according to the blow-insulation method for a house wall according to the present invention, the density at the time of the blow-in operation is made uniform and the sedimentation of the heat-insulating material is minimized irrespective of the kind of the insulating material. Can be suppressed.

[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-insulating method according to the present invention.

FIG. 3 is a cross-sectional side view illustrating an air flow in the blow-insulation method according to the present 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]

 Reference Signs List 31 back plate 32 base 33 beam 34, 35 pillar 36 stud 37 air vent net 37R air vent net back 40 shelf member 40F shelf member tip S gap

Claims (2)

[Claims] An insulation method in which a heat insulating material is blown into a wall between a wall back plate of a house and an air venting net provided on the indoor side by air, wherein the wall back plate has a predetermined interval in a vertical direction. The shelf member extending in the left-right direction is fixed, and the shelf member is formed into a predetermined shape by using a resin material having heat insulation and fire resistance. A blow-insulation method for a residential wall, wherein the amount of protrusion is at least 40% or more and at most 90% or less of the width dimension inside the wall. 2. A shelving member used in a blow-insulating method for a housing wall portion according to claim 1, wherein said shelving member is formed of a heat insulating material of the same or the same type as a heat insulating material blown by air. .