JPH0623645Y2 - Underfloor insulation structure - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to an underfloor heat insulating structure suitable for constructing a thick heat insulating layer under the floor of a building.

Technical background of the invention and its problems In recent years, in order to improve the heat insulating performance of buildings such as houses, the thickness of the plate-shaped heat insulating material applied to walls, floors, etc. has become thicker.

Conventionally, as shown in FIGS. 7 and 8, in place of using a thick plate-shaped heat insulating material, a relatively thin heat insulating material 40, 40 is made into two layers to improve heat insulating performance. In the example shown in FIG. 7, a joist 42 is bridged over the Daihiki 41, and the joist 4
The upper heat insulating material 40 is mounted between the two, and the lower heat insulating material 40 is mounted on the heat insulating material receiver 43 attached to the large pull 41. In the example shown in FIG. 8, the lower heat insulating material 40 is mounted between the joists 42, the upper heat insulating material 40 is mounted on the joist 42, and the floor base material is mounted on the upper heat insulating material 40. 44 and the floor material 45 are installed.

However, in the conventional underfloor heat insulating structure as shown in FIG. 7, a gap is apt to be formed between the large pull 41 and the lower heat insulating material 40, and this gap becomes a heat insulating defect, and the heat insulating property and airtightness of the floor. Could decrease the Further, in the conventional underfloor heat insulating structure shown in FIG. 8, since the upper heat insulating material 40 is provided on the joist 42 and the floor base material 44 and the floor material 45 are installed thereon, a high load acts on the floor. In this case, the upper heat insulating material 40 is dented and the floor is easily bent.

Purpose of the Invention The present invention has been made in order to eliminate such disadvantages of the conventional technology, and is excellent in airtightness, heat insulation and flex resistance,
Moreover, it is intended to provide an underfloor heat insulating structure that is easy to construct.

SUMMARY OF THE INVENTION In order to achieve such an object, the present invention arranges a joist bridge on the underfloor in the same direction as that of the Daihiki, and on the joist under the direction substantially perpendicular to the joist. Is an underfloor heat insulating structure in which a plate-shaped heat insulating material is arranged between the joist receivers and between the joists, and the plate-shaped heat insulating material arranged between the joist receivers is closely adhered to the joist receiver, In addition, the underfloor heat insulating structure is characterized in that the upper surface of the joist and the upper surface of the heat insulating material are arranged so as to be flush with each other.

As described above, in the underfloor heat insulating structure of the present invention, the joist bridges are arranged, and the heat insulating material is attached between the joist receivers so that the top surface of the joist receiver and the top surface of the heat insulating material are flush with each other. The joists are placed on top of the joists and a heat insulating material is attached between the joists. Since the floor material is laid on the joist, the weight applied from the floor is supported by the joist without directly affecting the heat insulating material. Therefore, the floor surface does not bend. Moreover, both end portions of the heat insulating material mounted between the joist receivers so as to be flush with the upper surface of the joist receivers are sandwiched in close contact with the joist receivers, and the side edges of the heat insulating material are Since it is supported on the upper surface of the large pull, a gap or the like is unlikely to be formed between the joist receiver and the heat insulating material, and therefore, according to the underfloor structure of the present invention, the heat insulating defect is less likely to occur.

Further, in the present invention, in such a heat insulating structure, preferably, the size of the large haul is set to a size obtained by adding a width size of the joist support to a width size of the heat insulating material of the standard size. The thickness is made substantially equal to the thickness of the heat insulating material of the standard size.

According to such an underfloor heat insulation structure of the present invention, the size of the large lead is set to the standard size of the heat insulating material width plus the width of the joist. It becomes possible to attach a standard size heat insulating material without cutting, and the airtightness and heat insulating property of the floor are improved, and the construction work is significantly facilitated. Also, since the height of the joists is set approximately equal to the thickness of the standard size heat insulating material, there is a gap between the heat insulating material installed between the joists and the heat insulating material installed between the joists. It is difficult to improve the airtightness and the heat insulating property.

Detailed Description of the Invention Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings.

FIG. 1 is a sectional view of an underfloor heat insulating structure according to an embodiment of the present invention, FIG. 2 is a sectional view of an essential part of the underfloor heat insulating structure, and FIGS. 3 to 6 are heat insulation used in other embodiments of the present invention. It is sectional drawing of a material.

As shown in FIG. 1, in an underfloor heat insulating structure according to an embodiment of the present invention, a base 2 is arranged on a foundation 1, and a root bundle 4 is erected on a pile stone 3, and this root bundle is A large drawing 5 is arranged on the surface 4. A joist support 6 is arranged on each of the large pullers 5 and the base 2 along the longitudinal direction of the large pullers 5 or the base 2.

In the present invention, the dimension L between the large hauls 5 is set to the dimension obtained by adding the width dimension 1 of the standard-sized heat insulating material 7 to the width dimension d of the joist receiver 6. If the dimension L is set in this way, the joist support 6 can be cut without cutting the standard-sized heat insulating material 7 on site.
Can be installed in between.

It is preferable that the height h of the joist receiver 6 be substantially equal to the thickness of the standard-sized heat insulating material 7.

The height h of the joist bridge 6 is made substantially equal to the thickness of the heat insulator 7 because the upper surface of the heat insulator 7 and the upper surface of the joist receiver 6 are flush with each other. This is to prevent a gap with the 8 from being formed.

The width dimension 1 of the standard-sized heat insulating material 7 is generally 910 mm, and when the width dimension d of the joist receiver is 45 mm, the width dimension L between the large pulls 4 is about 955 mm. Since the width of the base and Daihiki is often around 100 mm square, the width of the joist is 50 mm.
Around the corner is preferable. For example, if the width of the joist is 90 mm, then the width of the hajime (100 mm) -the width of the joist (90 mm) = 10 mm, and the width of the receiving part of the heat insulating material is about 5 mm on each side. It is not enough to receive the heat insulating material.

After mounting the heat insulating material 7 between the joist receivers 6, as shown in FIG. 2, the airtight tape 9 is attached to the joint between the end of each heat insulating material 7 and the joist receiver 6, or Alternatively, it is preferable to apply putty material. Then, the joists 10 are arranged on the joist receiver 6 in a direction substantially perpendicular to the joist receiver, and the heat insulating material 8 is mounted between the joists 10. It should be noted that the airtight tape may be preliminarily attached with heat insulating material receiving portions formed on both sides of the joist receiver 6 on the raft 5 before the heat insulating material 7 is attached.

As the heat insulating materials 7 and 8 described above, a synthetic resin foam heat insulating plate is preferable, and is a foam plate having a closed cell structure which is made by foaming a synthetic resin such as polystyrene, polyethylene, polyvinyl chloride, or polyurethane 5 to 50 times. The thickness is preferably 20 to 50 mm. Above all, it is effective to use an extruded polystyrene foam plate having a high degree of rigidity, heat insulation and moisture resistance. However, the heat insulating materials 7 and 8 are not limited to the above-described synthetic resin extruded foam plates, but synthetic resin bead foam plates, felt, glass wool, natural or synthetic fibers formed into a plate shape, and having appropriate hardness. If you can use it. When these materials are used as a heat insulating material, it is preferable to use a polyethylene film that is impermeable to water vapor as a covering material.

It is preferable that the heat insulating material 7 mounted between the joists 6 has a standard size dimension, but the heat insulating material 8 mounted between the joist 10 does not necessarily have to have the standard size dimension of the heat insulating material. As shown in FIGS. 3 to 6, heat insulating materials 8a to 8f having a heat insulating material width corresponding to a normal joist width are preferably used.

The heat insulating material 8a shown in FIG. 3 includes a plate-shaped first heat insulating material 21 and
Similarly, the plate-shaped second heat insulating material 22 and the first and second heat insulating materials 21, 22 are rotatably connected from the same plane to a state where they intersect at a predetermined crossing angle. Two
And a hinge portion 26 formed at the butt end 24 of the heat insulating material. In the vicinity of the ends of the first and second heat insulating materials that are in contact with the joist 10, thin grooves 16 that are substantially vertical to the plate surface are formed in a zigzag pattern.

The groove depth t of the narrow groove 16 is preferably about 2 / 3T with respect to the thickness T of the heat insulating material at the portion where the groove 16 is formed,
It is not limited to this. The groove width is preferably about 1 to 2 mm, but may be outside this range. The distance between the narrow grooves is 10
The thickness is preferably about 50 mm, but not limited to this.
Assuming that the total length of the heat insulating material 8a is W, the range in which such narrow grooves 16 are formed is the end surfaces 21a, 21a on the side of contact with the joist 10.
The range of 2a to about 1/4 · W is preferable. This is because if the narrow groove 6 is formed in each of the heat insulating materials 21 and 22, the rigidity against bending may be lowered too much.

As the hinge portion 26, an adhesive tape or other tape-like body attached to one surface of the abutting end portion 24 of each of the heat insulating materials 21 and 22, or another hinge member is used.

The heat insulating material 8a is manufactured as follows, for example. First, the first and second heat insulating materials are integrally formed. After that, the fine groove 16 is formed by means of cutting or the like, and the heat insulating material is cut along the butt end portion 24 to separate into the first and second heat insulating materials 21 and 22. After that, the heat insulating material 21,
A hinge portion 26 made of an adhesive tape or the like is attached to the butt end portion 24 of 22 from one side surface. The procedure for attaching the hinge portion 26 may be before forming the butt end portion 24 by cutting. The heat insulating material 8 thus completed
The width W of a is larger than the interval between the joists 10.

According to such a heat insulating material 8a, the first heat insulating material 21 and the second heat insulating material 21
The heat insulating material 22 and the heat insulating material 22 are crossed at a predetermined angle in the hinge portion 26 and installed between the joists 10, and then the hinge portion 26 is pressed from the opposite side.
Can be easily inserted between the joists 10. If necessary, the butt end 24 can be firmly fixed with an adhesive tape or the like.

The heat insulating material 8a shown in FIG. 4 is formed of a urethane plastic material or a single extruded polystyrene plastic. If the heat insulating material 8b is made of a urethane plastic material, face materials 28 and 30 made of kraft paper or the like are usually adhered on both sides and commercially available. Therefore, the heat insulating material 8b is cut along the butt end 24. At this time, the hinge portion 26a can be easily formed by cutting so as to leave the face material 30 on one side. Further, when the heat insulating material 8b is molded from a single extruded polystyrene plastic, since skin layers corresponding to the surface materials 28 and 30 shown in FIG. 4 are formed on the surface, the skin layer is left. If the slits are provided, the hinge portion 26a can be formed in the same manner as the embodiment shown in FIG. In the case of a flexible foam such as a polyethylene foam, the foam itself may have a hinge effect if a slit is formed leaving a part thereof.

In the heat insulating material 8c shown in FIG. 5, a thin groove 16 which is substantially perpendicular to the receiving plate surface such as the joist receiving side surface is formed in the vicinity of the contact side end portion. 26a is a type of heat insulating material that is not provided. Even when the heat insulating structure according to the present invention is configured by using such a heat insulating material 8c, the intended purpose of the present invention can be achieved.

Further, the formation location of the narrow groove 16 formed in the heat insulating material of the type shown in FIG. 5 can be variously modified as shown in FIGS. 6 (A) to 6 (C). In the heat insulating material 8d shown in FIG. 6 (A), the groove directions of the narrow groove 16 formed at one side end portion and the narrow groove 16 formed at the other side end portion are different from each other. In the heat insulating material 8e shown in (B), unlike 8d, the narrow groove 16 is formed in the same direction. Further, in the heat insulating material 8f shown in FIG. 7C, the fine grooves 16 are formed in a zigzag shape as a whole. In addition, formation of such a narrow groove is 8c.
Not limited to this, the present invention can also be applied to a heat insulating material of 8a or 8b.

The narrow groove 16 imparts suitable elasticity to the heat insulating material by plastically deforming and destroying the narrow groove by the lateral pressure applied to the heat insulating material when sandwiching the heat insulating material between the joists, This heat insulating material can be more reliably held between the joists.

Further, the heat insulating material 8 used in the heat insulating structure according to the present invention may have a cushioning member mounted on at least one of the fore edge surfaces thereof. The cushioning member is made of soft foamed plastic having a low compression rigidity, and is made of, for example, soft vinyl chloride foam, soft urethane foam, polyethylene foam, foamed acrylic, foamed vinyl chloride, or the like. Particularly preferably, the cushioning member is composed of soft vinyl chloride foam. This is because the soft vinyl chloride foam has a high closed cell rate, excellent heat insulating properties, and is inexpensive, while being excellent in water-tightness and air-tightness, and has good adhesiveness to the adhesive.

Such a cushioning member is adhered to at least one of the small surfaces of the heat insulating agents 8 and 8a to 8f with an adhesive or the like, and as the adhesive, for example, an acrylic, urethane or vinyl acetate adhesive is used. . It is preferable that the adhesive is applied to one side or both sides of the buffer member in advance. The thickness of the buffer member is preferably 1 to 10 mm, more preferably 2
~ 4 mm. Such a cushioning member is a heat insulating material 8, 8a.
It is preferable that the shape is in conformity with the edge surface shape of ~ 8f and that the edge surface is affixed in advance.

According to such heat insulating materials 8 and 8a to 8f, when the small edge surfaces of the respective heat insulating materials 8 and 8a to 8f are butted against each other and stretched between the joists 10, the cushioning member is satisfactorily compressed and each heat insulating material The gaps between the small surfaces of the materials 8, 8a to 8f are sealed, and no gaps are generated in the longitudinal direction of the heat insulating materials 8, 8a to 8f, so that the heat insulating performance is improved.

Effects of the Invention As described above, the underfloor heat insulation structure of the present invention is
Place the joist bridge, install the heat insulator so that the upper surface of this joist pad and the upper surface of the heat insulating material are flush with each other, and further place the joist on this joist stand. Insulation is also installed between the joists. And since the floor material is laid on this joist, the weight applied from the floor is
It is supported by joists without directly contacting the insulation. Therefore, the floor surface does not bend. Moreover, both end portions of the heat insulating material mounted between the joist receivers so as to be flush with the upper surface of the joist receivers are sandwiched in close contact with the joist receivers, and the side edges of the heat insulating material are Since it is supported by the upper surface of the large pull or the upper surface of the base, it is difficult for a gap or the like to be formed between the joist receiver and the heat insulating material.

Thus, according to the present invention, there are few heat insulation defects and there is no flexing of the floor.

As described above, according to the present invention, the size of the large lead is set to the standard size of the heat insulating material width plus the width of the joists, so that there is no gap between the joists. It is now possible to use a large pull as a heat insulating material receiver without cutting standard size heat insulating material, and to install it on the site with uneven dimensions and cut edges when cutting the heat insulating material with a cutter or saw. Insufficient airtightness due to poor smoothness is solved, the airtightness and heat insulation of the floor are improved, and the construction work is significantly facilitated. Also, since the height of the joists is made approximately equal to the thickness of the standard size heat insulating material,
It is difficult to form a gap between the heat insulating material installed between the joists and the heat insulating material installed between the joists, and in this respect also, the airtightness and the heat insulating property are improved. In addition, a thick heat insulating material can be applied regardless of the floor load (two layers are attached), and the problem of strength can be solved.

[Brief description of drawings]

FIG. 1 is a sectional view of an underfloor heat insulating structure according to an embodiment of the present invention, FIG. 2 is a sectional view of an essential part of the underfloor heat insulating structure, and FIGS. 3 to 6 are heat insulation used in other embodiments of the present invention. 7 and 8 are sectional views of a conventional underfloor heat insulating structure. 5,41 ...... Daihiki, 6 ...... joist receiving 7, 8, 40 ...... Insulation material 10, 42 ...... joists 8a-8f ...... Insulation material

Claims (2)

[Scope of utility model registration request] Claims: 1. A joist bridge is arranged in the same direction as the Daihiki under the floor, and a joist is arranged on the joist in a direction substantially perpendicular to the joist. It is an underfloor heat insulating structure in which a plate-shaped heat insulating material is arranged between the floor joists, and the plate-shaped heat insulating material placed between the joists is closely sandwiched between the joists and the top surface of the joists and the top surface of the heat insulator are An underfloor heat insulation structure characterized by being arranged so as to be flush. 2. The center-to-center dimension of the Daihiki is set to the standard size of the heat insulation material width dimension plus the width of the joist support, and the height of the joist support is set to the standard size of the heat insulation material. The underfloor heat insulating structure according to claim 1, wherein the underfloor heat insulating structure is substantially equal to the thickness of the underfloor.