JP5805338B1 - Ventilation layer forming member for polyurethane heat insulating material and roof insulation construction method using the ventilation layer forming member - Google Patents

Abstract

In a conventional roof heat insulation construction method, it is necessary to stretch another field board or moisture-permeable sheet on a rafter, and then attach another rafter, and then stretch another field board. There is a problem that the work for securing is complicated and takes time. In addition, the work of attaching the rafter after placing the moisture-permeable sheet on the rafter has a problem that the position of the rafter is difficult to understand because of the moisture-permeable sheet, and the workability is not good. A ventilation layer forming member used for heat insulation construction of a roof, having an integrated folded portion corresponding to the height of the ventilation layer on both side portions in the longitudinal direction of the plate member, and the longitudinal direction of the plate member It has an overlapping part with an adjacent ventilation layer forming member at one side end part, and further has an attaching part to a rafter cut out from the folded part at regular intervals along the folded line of the folded part. An air-permeable layer forming member for a polyurethane heat insulating material is used. [Selection] Figure 2

Description

  The present invention is a ventilation layer forming member used for heat insulation construction of a roof, and uses a polyurethane layer heat insulating material air layer forming member for forming an air layer between a base plate and a polyurethane heat insulating material. The present invention relates to a roof insulation construction method.

  In recent years, wooden houses have been equipped with insulation materials on the walls, floors, roofs, etc., but their airtightness is not so high, so they still have sufficient effects in terms of insulation performance. It is not allowed to be.

Therefore, highly airtight and highly heat-insulated houses that have both airtightness and heat insulation have been proposed. In this highly airtight and highly heat-insulated house, it is a common practice to provide a ventilation layer on the outdoor side of the heat insulating material for the purpose of preventing condensation and heat insulation from the roof material in the heat insulating construction of the roof.
As this roof insulation construction method, a method of filling a glass wool insulation material between rafters and providing a ventilation layer on the outdoor side of the insulation material is adopted, and the following construction methods are generally adopted. .

  First, a base plate or breathable sheet for the ventilation layer is stretched on the rafter, a rafter for forming the ventilation layer is further attached thereon, and another base plate is constructed thereon, and then the base plate and the base plate The space part used as a ventilation layer is formed between, and after that, the glass wool insulating material is filled between indoor side rafters.

  However, in the conventional roof heat insulation construction method, as shown in FIG. 6, after a ventilation base plate or a moisture-permeable sheet is stretched on the rafters from the roof side, and further, the ventilation layer rafters are attached. In addition, there is a problem that it is necessary to stretch a base plate on it, and the work for securing the air-permeable layer is complicated and takes time. In addition, the work of attaching the rafter after placing the moisture-permeable sheet on the rafter has a problem that the position of the rafter is difficult to understand because of the moisture-permeable sheet, and the workability is not good.

JP-A-7-310376 Japanese Patent Laid-Open No. 2001-40789

As means for solving these problems, the prior patent documents 1 and 2 show a technique for forming a ventilation layer using a cardboard spacer, and both of these spacers are basically made of glass wool. It was premised on the use of roof insulation.
Therefore, when a polyurethane heat insulating material is used for the roof heat insulating material, it is difficult for the spacer to prevent the polyurethane heat insulating material from entering the ventilation layer, and between the spacer and the polyurethane heat insulating material. Adhesiveness may be insufficient, and satisfactory thermal insulation performance may not be obtained.
Furthermore, the conventional spacers are not careful in workability at the time of mounting even in the shape of the spacers, and are not sufficiently compatible with on-site construction.

  The present invention has been made in view of such problems of the prior art, and the object of the present invention is to facilitate the formation of a ventilation layer in the field when a polyurethane heat insulating material is used as a roof heat insulating material. An air-permeable layer forming member for a polyurethane-based heat insulating material that can be formed and a roof heat insulating construction method using the same.

  The invention according to claim 1 newly developed by the present inventors to solve the above-mentioned problems is a ventilation layer forming member used for heat insulation construction of a roof, and the ventilation layer is formed on both side portions in the longitudinal direction of the plate member. It has an integrated folded portion corresponding to the height, has an overlapping portion with an adjacent ventilation layer forming member at one end in the longitudinal direction of the plate-like member, and is further spaced along the folded line of the folded portion Each is a ventilation layer forming member for a polyurethane-based heat insulating material, characterized in that it has an attachment portion to a rafter cut out from the folded portion.

According to a second aspect of the present invention, in the ventilation layer forming member for a polyurethane heat insulating material according to the first aspect, the height of the integrated folded portion is defined as 20 to 60 mm.
The invention according to claim 3 stipulates that, in the ventilation layer forming member for a polyurethane-based heat insulating material according to claim 1 or 2, the length of the overlapping portion with the adjacent ventilation layer forming member is 10 to 50 mm. Is.

The invention according to claim 4 defines an attachment portion to the rafter.
This mounting part is formed by hollowing out a part of the folded part, and is connected to the plate-like member at the folded line part, and between the mounting part and the folded part to facilitate the mounting work to the rafter. Is provided with a gap. For convenience of attachment, two to three attachment portions are formed along both fold lines, the length in the longitudinal direction is 30 to 100 mm, and the height in the height direction is 10 to 40 mm. It is.

The invention according to claim 5 defines the dimensions of the ventilation layer forming member.
Specifically, the length in the longitudinal direction including the overlapping portion is 800 to 1000 mm, and the length in the width direction including the folded portion is 300 to 600 mm. The standard thickness is about 5 mm, but can be appropriately adjusted according to the filling pressure of the polyurethane heat insulating material.

The invention according to claim 6 defines the material of the ventilation layer forming member.
Claim 6 defines the case where corrugated cardboard is used, and specifies that any surface of the corrugated cardboard has been subjected to adhesion improving treatment or heat-shielding treatment with a polyurethane heat insulating material. The specific processing contents are defined in the following claim 7.

The invention according to claim 7 defines the contents of the adhesion improving treatment or the heat shielding treatment when corrugated cardboard is used as the gas permeable layer forming member in the gas permeable layer forming member of the present invention.
Specifically, as the adhesive improvement treatment, a plurality of recesses are provided on the contact surface of the corrugated cardboard with the polyurethane heat insulating material, thereby enabling strong adhesion.

Moreover, about the heat-shielding, the heat from a roof can be effectively interrupted | blocked, for example by providing a metal layer in the surface by the side of the ventilation layer of corrugated cardboard. This metal thermal barrier layer can be formed by, for example, applying a metal powder containing paint such as aluminum or laminating a metal foil.
The invention which concerns on Claim 8 prescribes | regulates the roof heat insulation construction method using the ventilation layer forming member of this invention.

The content is a roof heat insulation construction method using the ventilation layer forming member for polyurethane-based heat insulating material according to any one of claims 1 to 7, wherein the air-permeable layer forming member is filled before filling with the polyurethane heat insulating material. Is attached to the rafters via the attaching portion so as to secure the ventilation layer, and thereafter, the polyurethane heat insulating material is filled in the installation surface of the ventilation layer forming member and the rafters.

  As described above, when the ventilation layer forming member of the present invention is used, the ventilation layer can be easily formed by simply attaching the ventilation layer to the rafter between the rafters via the attachment member from the indoor side, and the folded portion is integrated. Therefore, the workability during installation can be improved. If a gap is formed between the attachment portion and the folded portion, the workability is further improved.

  Further, when corrugated cardboard is used for the air-permeable layer forming member, moisture is discharged to the gas-permeable layer through the cardboard, so that there is little risk of condensation, and adhesion improving treatment and heat shielding improving treatment with the polyurethane heat insulating material are easily performed. be able to.

  The air-permeable layer securing member of the present invention is lightweight, and it is easy to secure the air-permeable layer. Moreover, the work can be performed quickly, and the work efficiency in the field can be improved. Moreover, improvement of workability | operativity can be anticipated from the point which can attach a ventilation layer ensuring member from the room inner side, and does not need to perform the construction from the roof side.

The perspective view seen from the ventilation layer side of the ventilation layer forming member concerning the present invention The perspective view seen from the heat insulating material side of the ventilation layer forming member concerning the present invention The perspective view seen from the ventilation layer side of the corrugated cardboard used for the ventilation layer forming member The perspective view seen from the heat insulating material side of the corrugated board used for a ventilation layer formation member Partial enlarged view of a ventilation layer forming member according to the present invention at the time of construction Conventional roof insulation construction diagram

  The ventilation layer forming member of the present invention is a ventilation layer forming member used for heat insulation construction of a roof, and has an integrated folded portion corresponding to the height of the ventilation layer on both side portions in the longitudinal direction of the plate-like member, and a plate At the one end in the longitudinal direction of the shaped member, there is an overlapping portion with the adjacent ventilation layer forming member, and further, an attachment portion to the rafter that is hollowed out from the folded portion at regular intervals along the folded line of the folded portion. The ventilation layer forming member can be attached to the rafter from the indoor side via the attachment portion.

  Further, the height of the integrated folded portion is preferably 20 to 60 mm, and the height of the folded portion corresponds to the size of the ventilation layer necessary between the base plate and the polyurethane heat insulating material. It is. If such a ventilation layer can be secured, it is possible to effectively prevent condensation and heat insulation from the roof. Moreover, since the folding | turning part is shape | molded integrally, the attachment operation | work to a rafter can be performed easily.

It is preferable that the length of the overlapping part with the adjacent ventilation layer forming member is about 10 to 50 mm.
In the present invention, a polyurethane-based heat insulating material is used as a heat insulating material for the roof instead of a fiber-based heat insulating material such as glass wool. In many cases, it protrudes, so that a work such as tape is required in the gap between the joints between the members.

However, in the present invention, by providing an overlap portion of a predetermined length in the ventilation layer forming member, it is possible to eliminate the gap with the adjacent member, and to easily prevent the polyurethane heat insulating material from protruding into the ventilation layer, This makes it possible to greatly improve the efficiency of on-site construction work.
In addition, the attachment part is formed by hollowing out a part of the folding part, and is connected to the plate-like member at the part of the folding line, so that the attachment part and the folding part can be easily attached to the rafter. There is a gap between them. For convenience of attachment, two to three attachment portions are formed along both fold lines, the length in the longitudinal direction is preferably 30 to 100 mm, and the height in the height direction is 10 It is preferably ˜40 mm.
Since the attachment portion has such a number and size, the ventilation layer forming member can be reliably and easily attached to the rafter using staples or the like.

Regarding the dimension of the ventilation layer forming member, the length in the longitudinal direction including the overlapping portion is 800 to 1000 mm, and the length in the width direction including the folded portion is preferably 300 to 600 mm. The length is generally about 5 mm, but can be changed according to the conditions during construction. These dimensions are determined by finding the optimum range by repeating the actual construction work many times with reference to the work efficiency and the spacing between the rafters.
Moreover, the strength and construction workability at the time of attachment can be improved by making the direction of the center of the corrugated cardboard perpendicular to the rafter.

  As the ventilation layer forming member, corrugated cardboard is preferable from the viewpoint of lightness and moisture permeability, but the use of other materials is not denied. And when using corrugated cardboard, it is preferable that both surfaces of the corrugated cardboard are subjected to an adhesion improving treatment with a polyurethane heat insulating material on one side and a heat shielding treatment on the back surface.

  When using a polyurethane-based heat insulating material as in the present invention, depending on the state of the surface of the corrugated cardboard, the adhesiveness with the polyurethane-based heat insulating material may be insufficient. An effective method has not yet been developed.

In the present invention, as an improvement measure, by providing a plurality of concave portions on the contact surface side of the corrugated cardboard with the polyurethane heat insulating material, it is possible to firmly bond the heat insulating material.
As shown in FIGS. 2, 4, and 5, it is preferable that the recess is provided regularly or randomly at intervals of 30 to 100 mm as shown in FIGS. .
Moreover, it is preferable that this recessed part is not a through-hole so that a polyurethane-type heat insulating material may not penetrate | invade a ventilation layer, especially when the diameter of a recessed part is large.

  In addition, with respect to the heat shield, heat from the roof can be effectively shielded by providing a metal layer such as aluminum on the surface of the corrugated cardboard on the side of the ventilation layer. This heat shield layer can be formed by applying an aluminum powder-containing paint or laminating an aluminum foil.

  In the roof insulation construction using the ventilation layer forming member of the present invention, prior to filling with the polyurethane-based heat insulating material, the ventilation layer forming member is attached to the rafters via the attachment portion to ensure the ventilation layer, Then, the surface of the ventilation layer forming member and the rafter is filled with a polyurethane heat insulating material.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 is a perspective view of the ventilation layer forming member according to the present invention as viewed from the ventilation layer side, FIG. 2 is a perspective view of the ventilation layer forming member according to the present invention as viewed from the heat insulating material side, and FIG. 3 is a ventilation layer. FIG. 4 is a perspective view of the corrugated cardboard used for the forming member as viewed from the air-permeable layer side, FIG. 4 is a perspective view of the corrugated cardboard used for the air-permeable layer-forming member from the heat insulating material side, and FIG. FIG. 6 is a partially enlarged view and FIG. 6 is a conventional roof insulation construction diagram.

As shown in FIGS. 1 and 2, the polyurethane heat insulating material ventilation layer forming member 1 according to the present invention is used for heat insulating construction of a roof, and has lightness and air permeability such as corrugated cardboard formed in a predetermined dimension. The folded portions 2 on both side surfaces along the long side direction of the plate-shaped member having the folded-back portions 2 are integrally folded along the folding lines 4 with the attachment portions 3 left, and the folded portions 2 are raised, and in this state, the attachment portions 3 A ventilation layer is formed by attaching to a rafter via At this time, since the folded portion 2 is formed integrally, it can be easily attached to the rafter.
Moreover, by having the overlapping part 5 with an adjacent ventilation layer forming member, it can prevent that a polyurethane-type heat insulating material penetrate | invades into a ventilation layer, and can ensure favorable ventilation performance.

The plate-like member has a shape as shown in FIGS. 1 to 4. For example, the length in the longitudinal direction including the overlapping portion is 800 to 1000 mm, and the length in the width direction including the folded portion is 300 to 600 mm. Is preferable from the viewpoint of workability. Moreover, although thickness is about 5 mm, it can change suitably. If it is out of these ranges, there may be a problem in workability and flatness when attached.
Further, if the material for the breathable layer forming member 1 for polyurethane heat insulating material is corrugated cardboard, it has moisture permeability, so there is little risk of condensation and it is excellent in terms of lightness.

The two folding lines 4 that form the folded portion 2 along the longitudinal direction of the cardboard can be perforated over the entire length, and folded back leaving attachment portions at both perforations.
The folding line is not limited to a perforation, and is not particularly limited as long as folding is possible.
Moreover, the attachment part 3 is provided with a gap as a space between the folded part and the folded part so as to facilitate separation from the folded part. The mounting portion gap is functionally sufficient if it is provided at least on both sides in the width direction of the mounting portion.

The reason is that the folded portion needs to be formed integrally in consideration of workability, and therefore there is often little room for providing a space between the folded portion and the mounting portion height direction.
The concave portion 6 on the surface on one side of the cardboard may be provided on the surface on the side in contact with the polyurethane heat insulating material as necessary. In addition, a metal layer that becomes a heat shielding layer by a treatment for heat shielding, for example, application of a metal powder-containing paint such as aluminum, bonding of an aluminum foil, or the like is provided on the rear surface of the air-permeable layer side as necessary. It may be formed.

In order to attach the ventilation layer forming member of the present invention to a rafter, as shown in FIGS. 1 and 2, the folded-back portions 2 on both side surfaces are raised so that a space portion serving as a ventilation layer can be formed. Is attached to the rear rafter in a bent state.
At this time, the adjacent ventilation layer forming members are attached with no gap between the overlapping portions 5 to form a continuous ventilation layer.
In addition, it is preferable in terms of workability that the direction of the core of the corrugated board is orthogonal to the rafter.

The roof heat insulating construction method according to the present invention is a polyurethane-based heat insulating material side, that is, a lower side, with respect to a roof member made of rafters provided at a predetermined interval and a base plate on the upper surface thereof, With the folded portion 2 folded upward, the ventilation layer forming member 1 is attached to the rafter via the attachment portion 3 from the indoor side.
Next, with the ventilation layer secured, the polyurethane heat insulating material is filled into the installation surface of the ventilation layer forming member 1 and the rafters from the indoor side.

Examples of the polyurethane-based heat insulating material used in the present invention include Puff Pure Ace and MOCO foam (both manufactured by Nippon Paphtem Co., Ltd., trade names), etc., using water or hydrofluoroolefin as a foaming agent, The heat insulating material is superior in environmental performance and heat insulation performance, and the heat insulation performance is superior to that of residential glass wool.
The construction of the polyurethane heat insulating material involves heating, pressurizing, mixing and stirring the liquid consisting of polyol, catalyst, additive and foaming agent and the liquid consisting of isocyanate and additive on site with a foaming machine, and using a spray. To do. In this case, it is preferable that the spraying surface of the air-permeable layer forming member such as corrugated cardboard is subjected to adhesion improving treatment, for example, formation of a recess.

  In this way, by interposing the air-permeable layer forming member, even if the polyurethane heat insulating material is sprayed and filled to the air-permeable layer forming member with a certain pressure, the air-permeable layer forming member is not crushed and the base plate and the air-permeable layer A space having a height corresponding to the folded portion can be ensured between the forming member and a ventilation layer effective for preventing condensation or heat insulation can be formed between the base plate and the heat insulating material.

At this time, if the direction of the core of the corrugated cardboard is orthogonal to the rafters, favorable results in workability and finish can be obtained.
As described above, corrugated cardboard is preferable as a material for forming the air-permeable layer forming member, but is not particularly limited as long as the material has the same level of lightness and moisture permeability. In the case of corrugated cardboard, the quality of paper, the thickness of the paper, the number of cores, etc. are not particularly limited.

DESCRIPTION OF SYMBOLS 1 Air-permeable layer formation member 2 Folding part 3 Attachment part 4 Folding line 5 Overlapping part 6 Recessed part

Claims (6)

It is a ventilation layer forming member used for heat insulation construction of the roof, and has an integrated folded portion corresponding to the height of the ventilation layer on both longitudinal side surfaces of the plate-like member,
At the one end in the longitudinal direction of the plate-shaped member, there is an overlapping portion with an adjacent ventilation layer forming member, and the length of the overlapping portion is 10 to 50 mm,
Furthermore, it has attachment portions to the rafters cut out from the turn-up portion at regular intervals along the turn-up line of the turn-up portion. A plurality of non-penetrating recesses having a diameter of 5 to 20 mm for improving adhesiveness are formed at intervals of 30 to 100 mm on the contact surface side of the corrugated cardboard with the polyurethane heat insulating material. A ventilation layer forming member for a polyurethane-based heat insulating material.   The ventilation layer forming member for a polyurethane-based heat insulating material according to claim 1, wherein a height of the integrated folded portion is 20 to 60 mm. Two or three attachment portions to the rafter are formed along both fold lines in a state where both side portions are cut out with a gap between the fold portions and the length in the longitudinal direction is 30. The ventilation layer forming member for a polyurethane-based heat insulating material according to claim 1 or 2 , wherein a height in the height direction is 10 to 40 mm. The dimensions of the vent layer-forming member is a longitudinal length 800~1000mm including the overlapping portion, it claims 1 to 3 in which the width direction length including the folded portion is characterized in that it is a 300~600mm The air-permeable layer forming member for a polyurethane heat insulating material according to any one of the above. The ventilation layer forming member, polyurethane thermal insulation material ventilation layer according to any one of claims 1 to 4, characterized in that the thermal barrier layer is formed on the back side of the contact surface with the polyurethane thermal insulation material Forming member. It is a roof heat insulation construction method using the ventilation layer forming member for polyurethane heat insulating materials according to any one of claims 1 to 5 ,
Prior to filling the polyurethane insulation, the ventilation layer forming member is attached to the rafter via the attachment portion to secure the ventilation layer, and then the polyurethane insulation is installed on the ventilation layer forming member and the rafter. A roof insulation construction method characterized by filling a surface.

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