JP4436210B2 - Large-scale thermal insulation structure - Google Patents

Description

  The present invention relates to a heat insulating structure made of steel or wood in a first floor lower part of a building such as an underfloor ventilation house.

  Conventionally, as an improvement proposal regarding the structure of steel pulling used for a floor set of a house or other buildings, there is one disclosed in, for example, Japanese Patent Application Laid-Open No. 2000-73527 (Patent Document 1). In this improvement plan, the strength of the large pull formed in a rectangular tube made of a rust-proof steel plate that has been hot-plated with zinc / aluminum alloy is to be improved. Two concave portions are formed in the material length direction and a plurality of reinforcing ribs are provided in the vertical direction. In addition, a concave groove is provided in the material length direction at the center of the upper surface of the large pull to improve the vertical rigidity of the upper surface.

  However, because the surface of the steel large drawer is exposed in the underfloor space, in a house with an underfloor ventilation structure, the large pull is cooled by the influence of outside air, that is, by the outside air, and as a result, the screw that holds the floor plywood is used. A cold bridge is unavoidable and may cause condensation on the screw head and floor.

  In addition, when the steel draw is cooled down to the same temperature environment as the underfloor temperature, the floor plywood is cooled linearly along the steel draw, and the heat flow resistance of the entire floor is reduced and the room temperature is lowered. In order to keep the room at a comfortable temperature, stronger heating is required, which may be contrary to energy saving.

  Compared to steel pulling, wooden pulling has traditionally been highly heat-insulating, so it was rather exposed to the space under the floor and there was concern about condensation and low temperature in the room. And the structure which arrange | positions a heat insulating material on the lower surface was taken.

  On the other hand, due to the increasing trend toward energy saving, recently, the entire floor surface is required to have heat insulation performance that satisfies the next generation energy saving standards. The only way to solve this problem is to increase the cross-section of the wooden drawer, and there was no technical means that could solve this problem, especially for steel drawers where thermal bridges are a concern.

Specifically, for example, the installation of a heat insulating material on the lower surface, which does not expose the steel pull to the outside air, can resist downward loads, that is, there is no good structure that does not fall off even if pushed from above. In addition, processing the heat insulating material into a complicated structure is expensive in the prior art.
JP 2000-73527 A

  Therefore, the present invention covers the exposed portion of the steel pulling with a heat insulating covering material so that the covering material can be held in the mounted state, and the underfloor heat insulating material installed between each pulling is covered with the covering material. The purpose is to enable high underfloor heat insulation performance.

  In order to solve the above-mentioned problem, the invention according to claim 1 is directed to a foamed plastic in applying a heat insulating material to an exposed portion of a steel or wooden pulling in a lower part of the first floor of a building such as an underfloor ventilation house. Using a heat insulating material with a U-shaped cross-section that opens upward, a covering material formed in the shape of a bowl in the length direction is extrapolated from below the large pull and attached, and a band-shaped U-shaped fastener is attached from above Extrapolated to hold the covering material in a mounted state.

  The invention according to claim 2 is the projection according to claim 1, wherein the covering material extends a predetermined amount outward in the horizontal direction at the lower part of the both side surfaces or the intermediate part in the height direction and extends in the material length direction. The under-floor heat insulating material disposed between the large draws can be held by the convex portion.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein when the covering material is extrapolated and mounted, in the bundle support portion of the large pull and the steel bundle that supports the covering material, the covering material is provided. In the material width direction, using a split-type bundle support part covering material that is cut into a predetermined length in the material length direction and divided into two parts in the material width direction and formed with a notch, avoiding interference of the bundle support part The bundle support portion covering material is sandwiched and covered from both sides of the sheet.

  According to a fourth aspect of the present invention, in the invention of the first or second aspect, when the covering material is extrapolated and mounted, in the bundle support portion of the large pull and the steel bundle that supports the covering material, the covering material is provided. Is cut by a predetermined length in the material length direction and is covered with an integral bundle support portion covering material formed by forming a notch, avoiding interference with the bundle support portion covering material.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the fastener is provided with claw portions erected on both inner sides of the U-shaped parallel leg portions, and the covering material is attached. Later, the U-shaped parallel leg portions are once expanded and extrapolated, and then the parallel leg portions are restored to a parallel state so that the claw portions are bitten into the covering material to prevent the covering material from falling off.

  Invention of Claim 6 is polyethylene, a polypropylene, or a polystyrene foam heat insulating material in which the foamed plastic type heat insulating material is shape | molded by the extrusion method or the bead manufacturing method in the invention of any one of Claims 1-5. It is characterized by being.

  According to the present invention, it is possible to easily cover the exposed portion of the steel or wooden pulling with the heat insulating coating material. Since the covering material can be prevented from falling off with a simple structure, construction of the covering material is facilitated, and the cost is low and the life is long. Moreover, since the underfloor heat insulation board can be held by the convex portions provided on both side surfaces of the covering material, the construction of the heat insulation material for the entire underfloor is facilitated and work can be performed efficiently. Moreover, since a heat insulating member having a complicated shape such as a divided covering material can be formed by using a polystyrene foam heat insulating material, a heat insulating structure and a dew condensation preventing structure can be realized at low cost. Even if repair work is necessary, it can be easily handled.

  The heat insulation structure of steel or wooden pulling according to the present invention is implemented as follows.

  A first embodiment of the present invention will be described with reference to FIGS. 1 (a) to 1 (d) are explanatory views showing an outline of a heat insulating coating structure of a steel drawstring 1 that has been heat insulating coated. FIG. 1A is an external view showing a covering state of the large pull 1, but illustration of members of the steel bundle 2 that supports this is omitted. FIG.1 (d) is sectional drawing which looked at two large pulls 1 installed in parallel from the edge part side. FIG. 1D is a perspective view showing a covering state in the general part 3 of the large pull 1 (the position excluding the support part is called a general part). FIG. 1 (d) is a perspective view of a band-shaped fastener 5 that holds the covering material 4. FIGS. 2 and 3 are explanatory views showing the structure of the bundle support part covering materials 7 and 8 of the split type and the integral type in the bundle support part 6 of the draw 1 and the steel bundle 2.

  The structure and covering method of the covering material 4 of the large pull 1 in the underfloor part of the underfloor ventilation house will be described below. As shown in FIGS. 1 (a) to 1 (d), a steel draw 1 is roll-formed into a tube having a long cross section, and a steel bundle 2 that supports the draw 1 is drawn under the draw 1. Are arranged at predetermined intervals in the material length direction. The large pull 1 is not limited to a steel one but may be a wooden large pull. In the steel bundle 2, the lower end screw portion 11 of the turnbuckle 10 is fixed on the soil concrete 9, and the upper end screw portion 12 (bundle support portion covering material) is integrated with the reinforcing plate 1 a portion integrated with the lower surface portion of the draw 1. It is fixed. Non-rotating nuts 13 are respectively attached to the top and bottom of the turnbuckle 10, and the anti-rotation nuts are stopped after adjusting the height of the large pull 1.

  As shown in FIG. 1 (c), the general portion 3 excluding the bundle support portion 6 with the steel bundle 2 of the draw 1 has, for example, a U-shape opened upward using a polystyrene foam by a bead manufacturing method. The covering material 4 which is formed in a cross-sectional shape to be exhibited, has a long hook shape and has a convex portion 4a which protrudes outward in the horizontal direction in the middle of the height direction of both side surfaces is extrapolated from below, As a result, the overdraw 1 is thermally insulated. And the convex part 4a of both side surfaces is supporting the both ends of the heat insulation board 14 installed between the draws 1 as shown in FIG.1 (b).

  As shown in FIG. 1 (a), a plurality of fasteners 5 are attached from above at a predetermined interval and the covering material 4 is held in a state where the large pull 1 is thermally insulated with the covering material 4. . As shown in FIG. 1 (d), a plurality of claw portions 5 b are provided on both inner sides of the U-shaped parallel leg portions 5 a of the band-shaped steel plate fastener 5, and the claw portions 5 b are attached to the covering material 4. The covering material 4 is prevented from falling off. The detailed structure of the fastener 5 will be described later (FIG. 5).

  As shown in FIGS. 2 (e) and 2 (f), in the bundle support portion 6 of the steel bundle 2 and the large pull 1, the length range covering the reinforcing plate 1a is shown in FIGS. 2 (a) to 2 (d). It coat | covers with the split type | mold bundle support part coating | covering material 7 shown in FIG. This split-type bundle support portion coating material 7 is also molded using polystyrene foam.

  As shown in the cross-sectional view of FIG. 2C, the split-type bundle support portion covering material 7 is obtained by cutting the covering material 4 into a length that covers the reinforcing plate 1a in the material length direction. It is formed in a shape divided into two in the material width direction (left and right in the figure). A convex portion 7d and a concave portion 7e are respectively formed at opposing portions of the bottom portions 7c of the left and right half portions 7a and 7b, and both are formed to extend in the horizontal direction.

  And when both the half parts 7a and 7b are mounted | worn with the large pull 1 inserted | pinched from right and left, the convex part 7d and the recessed part 7e will engage. FIG. 2B shows this wearing state. 2A is a view (plan view) as viewed from the arrow a in FIG. 2B, and FIG. 2D is a view as viewed from the arrow b in FIG. 2B (side view).

  In order to prevent the convex portion 7d and the concave portion 7e from interfering with the upper end screw portion 12 of the steel bundle 2 when both the half portions 7a and 7b are mounted, a semicircular cutout 7f is provided as a cutout portion. It has been. 2A and 2B show the notch 7f in the mounted state. After mounting both halves 7a and 7b, the exposed portion and the gap portion remaining (generated) between the split-type bundle support portion covering materials 7 and the covering material 4 of the general portion 3 are completely removed by an embedding material or the like. fill in.

  FIGS. 3A to 3D show examples of design changes of the covering material of the bundle support portion 6. In this modified example, unlike the split-type bundle support portion covering material 7, it is formed as a single piece. That is, the integrated bundle support portion covering material 8. A U-shaped cutout 8b as a cutout is provided on one end side of the bottom 8a. In mounting, before mounting the covering material 4 that covers the general portion 3, the U-shaped notch 8 b of the integrated bundle support portion covering material 8 is directed in advance toward the upper end threaded portion 12 of the steel bundle 2. It is carried out by inserting it in the length direction of the pull 1. The exposed portion clearance after mounting is performed in the same manner as in the above design example. FIG. 3B is a view (plan view) as viewed from the direction of the arrow b in FIG.

  Next, the polystyrene foam by the bead manufacturing method used for the covering material 4 will be described slightly below. In the beaded polystyrene foam, raw beads made of polystyrene resin and hydrocarbon-based foaming agent are pre-foamed and then filled into a mold and heated to form any and complex shapes easily and in a short time. be able to. The expansion ratio can be about 30 to 80 times as much as about 30 times that of the extrusion method, requires less raw materials, has abundant closed cells, and is inexpensive and has high heat insulation performance. There are also oil-resistant and chemical-resistant polypropylene as mold forming, but the cost is high. On the other hand, the extrusion method is a production method suitable for mass-producing a rectangular heat insulating material such as a so-called board shape, and is used for an outer heat insulating material such as an outer heat insulating method. If it is going to implement | achieve the complicated shape like this invention, once a rectangular cross section will be produced, it will cut out and shape | mold, a labor and material yield will become large, and cost will also become expensive. Polyethylene is also included in the extrusion process.

  Thus, according to the present embodiment, the exposed portion of the steel draw 1 can be easily covered with the integral bundle support portion covering material 8 that covers the bundle support portion 6 and the covering material 4 that covers the general portion 3. is there. And since the holding | maintenance material 4 can be hold | maintained using the fastener 5 of a simple structure, construction of the covering material 4 is facilitated, and it is cheap and has a long life.

  Moreover, since the underfloor heat insulation board 14 can be hold | maintained by the convex part 4a provided in the both sides | surfaces of the coating | covering material 4, construction of the heat insulation material of the whole underfloor is facilitated and work can be performed efficiently. Further, by using a polystyrene foam heat insulating material, a heat insulating member having a complicated shape such as the split-type bundle support portion covering material 7 can be formed, so that a heat insulating structure and a dew condensation preventing structure can be realized at low cost. Even if repair work is necessary, it can be easily handled.

  A second embodiment of the present invention will be described with reference to FIGS. 4 (a) to 4 (c) are explanatory views showing an outline of the heat insulating covering structure of the steel-drawn steel 1 coated with heat insulation, and FIG. 4 (a) is an external view showing the covering state of the large drawing 1. However, illustration of 2 parts of steel bundles which support this is omitted. FIG. 4B is a cross-sectional view of the two large drawers 1 installed in parallel as viewed from the end side. FIG. 4C is a cutaway perspective view showing a covering state of the general portion 3 (excluding the support portion) of the large pull 1.

  This embodiment is different from the first embodiment in the structure of the covering material 15 and the other structures are the same. Therefore, the difference will be mainly described, and a duplicate description will be omitted.

  As shown in FIGS. 4 (a) to 4 (c), the general portion 3 of the large pull 1 has, as shown in FIG. 4 (c), convex portions 15a projecting horizontally on both sides of the bottom portion 15b over the entire length. Is formed. A convex portion 15a is also formed on the bottom portion 15b of the bundle support portion covering material 8 of the bundle support portion 6 of the large pull 1 and the steel bundle 2 supporting the same. This point is different from the first embodiment, and the other structures are the same.

  FIG. 5 is a three-side view of a strip-shaped steel fastener 5 that holds the attached covering material 4. The fastener 5 is the same member as in the first embodiment, but the explanation is slightly supplemented with reference to FIG. As shown in FIGS. 5 (a) to 5 (c), the fastener 5 is formed by bending a strip-shaped thin steel plate into a U-shape, and a V-shaped cut 5c is formed in the parallel leg portion 5a. Is bent inward at right angles to form two claw portions 5b (FIGS. 5a and 5c). And the front-end | tip part of the parallel leg part 5a is bend | folded at right angle similarly, and the large nail | claw part 5d which exhibits a slightly larger triangle than the said nail | claw part 5b is formed (FIG. 5a, b).

In this way, when attaching the fastener 5 to hold the covering material 4, the tips of the parallel legs 5 a of the fastener 5 are expanded and covered with the covering material 4 from above, and then the original is restored by the action of elastic restoring force. It is restored to a U shape, and the claws 5b and the large claws 5d on both sides are bitten into the covering material 4. At this time, a V-shaped notch 5e is provided in the upper side plate portion to facilitate expansion of the distal end portion of the parallel leg portion 5a and to adjust the elastic restoring force (FIG. 5a). In this way, the same effect as that of the first embodiment can be obtained also in this embodiment.

(A) is the external view which shows the covering state of steel large drawing in 1st Example of this invention, (b) is sectional drawing which looked at two large drawings from the edge part side, (c) Is a perspective view showing a covering state, and (d) is a perspective view of a fastener. (A)-(f) is explanatory drawing which shows the structure of the division | segmentation type | mold bundle support part coating | covering material in the bundle support part of a large drawing and a steel bundle in 1st Example. (A)-(d) is explanatory drawing which shows an integral bundle support part coating | coated material by the example of a design change in 1st Example. (A) is the external view which shows the covering state of steel large drawing in 2nd Example of this invention, (b) is sectional drawing which looked at two large drawings from the edge part side, (c) FIG. 3 is a cutaway perspective view showing a covering state. (A)-(d) is explanatory drawing which shows the structure of the fastener in 1st, 2nd Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Large drawing 1a Reinforcement plate 2 Steel bundle 3 Large drawing general part 4 Cover material 4a Convex part 5 Fastener 5a Parallel leg part 5b Claw part 5c V-shaped cut 5d Large claw part 5e V-shaped notch 6 Bundle support Part 7 Split type bundle support part covering material 7a Left half part 7b Right half part 7c Bottom part of split type bundle support part covering material 7d Convex part 7e Concave part 7f Semicircular cutout (notch part)
8 Integrated Bundle Support Covering Material 8a Bottom of Integral Bundle Support Covering Material 8b U-shaped Notch (Notch)
9 Clay concrete 10 Turnbuckle 11 Lower end screw part 12 Upper end screw part (member of bundle support part)
Reference numeral 13: Detent nut 14 Insulation board 15 Coating material 15a Protruding portion 15b Bottom of coating material 15

Claims (6)

  When constructing a heat insulating material on the exposed part of the steel or wooden pulling in the lower part of the first floor of a building such as an underfloor ventilation type house, the cross-sectional shape is opened upward using a foamed plastic-based heat insulating material. The covering material formed in the shape of a bowl in the material length direction is extrapolated from below the large pull and attached, and the band-shaped U-shaped fastener is extrapolated from above to hold the covering material in a large state Pulling heat insulation structure.   The covering material is provided with a convex portion extending in the horizontal direction at a lower portion of the both side surfaces or in the height direction middle portion and extending in the material length direction, and an underfloor heat insulating material disposed between the large draws. The large-diameter heat insulating structure according to claim 1, wherein the convex portion can be held.   In extrapolating and attaching the covering material, in the bundle support portion of the large pull and the steel bundle that supports it, the covering material is cut into a predetermined length in the material length direction and divided into two in the material width direction, In addition, using a split-type bundle support part covering material formed with a notch, the bundle support part covering material is sandwiched and covered from both sides in the material width direction while avoiding interference with the bundle support part covering material. The large heat insulating structure according to claim 1 or 2.   When extrapolating and attaching the covering material, the bundle supporting portion of the large pull and the steel bundle that supports the covering material is formed by cutting the covering material into a predetermined length in the material length direction and forming a notch portion. 3. The heat-insulating structure according to claim 1 or 2, wherein an integral bundle support part covering material is used to cover the bundle support part covering material while avoiding interference with the bundle support part covering material.   The clasps have claws that stand on both sides of the U-shaped parallel legs, and after the covering is installed, the U-shaped parallel legs are expanded and extrapolated, and then the parallel legs are restored to a parallel state. The large-diameter heat insulating structure according to any one of claims 1 to 4, wherein the claw portion is bitten into the covering material to prevent the covering material from falling off.   The method according to any one of claims 1 to 5, wherein the foamed plastic heat insulating material is manufactured by an extrusion method or a bead manufacturing method, and the material is polyethylene, polypropylene or polystyrene foam. Pulling heat insulation structure.

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