JP2023108965A - Heat insulation material metal fitting and heat insulation structure for steel structure building - Google Patents

Abstract

To provide a heat insulation material metal fitting capable of efficiently fixing a board-like heat insulation material in a flange surface straight direction of a steel beam, and a heat insulation structure for a steel structure building using the same.SOLUTION: A heat insulation material metal fitting 1 comprises: a clip 10 provided with a pair of holding pieces 11 and 12 capable of elastically holding an edge of a flange 31; and a heat insulation material piercing claw 15 protruding from one holding piece 12 in a direction orthogonal to the holding piece 12. The heat insulation material metal fitting 1 holds the clip 10 in a lower flange 31B of a steel beam 3 from an indoor side, and is attached to the steel beam 3 with the heat insulation material piercing claw 15 downward. The heat insulation material piercing claw 15 pierces an upper end surface of a board-like heat insulation material 4 built below the steel beam 3, and thus the heat insulation material 4 is fixed below the steel beam 3.SELECTED DRAWING: Figure 3

Description

The invention disclosed by the present application relates to a heat insulating material fixing bracket used in a heat insulation method for the outer peripheral portion of a steel-framed building, and a heat insulating structure of a steel-framed building using the heat insulating material fixing bracket.

The following methods are known as heat insulation methods employed for the outer peripheral portion of steel-framed buildings.

(1) A construction method in which a heat insulating material is filled in the frame (inside the structural surface) of the frame frame surrounded by the pillars and beams of the outer peripheral portion and fixed to the frame frame with tape or the like (for example, Patent Document 1). Fiber-based heat insulating materials such as glass wool and rock wool are often used as the heat insulating material.

(2) A construction method in which the inner wall foundation built on the indoor side of the frame frame is made heat-insulating. Specifically, in a frame-shaped inner wall foundation formed by placing studs at appropriate intervals between upper and lower runners, the gaps between the studs are filled with a heat insulating material (for example, Patent Document 2). As the heat insulating material, not only the fiber heat insulating material but also a hard board-like heat insulating material made of expandable resin (polystyrene foam, urethane foam, phenol foam, etc.) is often used. When a fiber-based heat insulating material is used, it can be filled in a bag made of a resin film and the lugs of the bag can be fastened to studs or the like with screws or tuckers.

JP 2016-216896 A Japanese Utility Model Laid-Open No. 05-054706

In the heat insulation construction method (1) above, the insulation must be filled while avoiding the braces and the like arranged in the structural surface of the frame framework, so the construction is troublesome. Heat insulation performance tends to be uneven depending on the part in the structure plane, and it becomes difficult to ensure airtight performance. Furthermore, since it is difficult to completely cover the inner surfaces of pillars and beams, which are likely to become thermal bridges, with a fiber-based heat insulating material, it is necessary to perform heat insulation treatment on these parts separately.

In the heat insulation method (2), the lightweight steel runners and studs forming the inner wall substrate act as thermal bridges, resulting in a decrease in heat insulation performance. In addition, gaps in the insulation and airtight lines remain in the space formed between the inner wall foundation and the upper floor beams.

In view of such circumstances, the invention disclosed in the present application uses a board-shaped heat insulating material that is easy to obtain uniform and good heat insulating performance, so that there is no break between the frame framework and the inner wall foundation of the outer peripheral part of the steel frame building. In order to form a heat insulating and airtight line, we propose a heat insulating material fixing metal fitting that can efficiently fix such heat insulating material in the vicinity of the steel frame beam, and a heat insulating structure of a steel frame building using the heat insulating material fixing metal fitting. be.

The heat insulating material fixing bracket adopted by the invention disclosed in the present application is attached to the flange of a steel beam having at least one flange, and is used to fix the board-shaped heat insulating material erected in the direction perpendicular to the flange. A clip portion having a pair of clamping pieces capable of elastically clamping the edge of the flange, and a clip portion perpendicular to the clamping piece from one of the pair of clamping pieces. and insulation-piercing claws protruding into.

Further, the heat insulating material fixing fitting includes a projecting piece extending from the rear surface of the clip portion in the direction in which the flange extends, and a film fastening clip formed separately from the clip portion and capable of clamping the projecting piece from both sides. and

Further, the heat insulating material fixing fitting is characterized in that at least one of the pair of holding pieces has a retaining piece that can be engaged with the mounting hole formed in the flange.

In addition, the heat insulation structure of a steel-framed building adopted by the invention disclosed in the present application includes a lower flange of a steel-framed beam arranged in the outer peripheral portion of the steel-framed building, the heat insulating material fixing fitting, and the clip part on the lower flange. A board-like under-beam heat insulating material is installed under the steel beam, and the heat insulating material is fixed to the upper end surface of the under-beam heat insulating material. The under-beam heat insulating material is fixed to the lower flange of the steel frame beam by piercing the heat insulating material puncturing claw of the fitting.

Further, in the thermal insulation structure of a steel-framed building, the under-beam heat-insulating material is erected so that the indoor-side surface thereof protrudes toward the indoor side from the indoor-side side edge of the lower flange of the steel-frame beam. A board-shaped beam-crossing thermal material is also fitted on the indoor side of the beam, and the indoor-side surface of the under-beam heat insulating material and the indoor-side surface of the beam-crossing thermal material are flush with each other. characterized as

Furthermore, in the thermal insulation structure of a steel-frame building, a film material for the purpose of airtightness, moisture-proofing, or fire resistance is laminated over the indoor surface of the under-beam thermal insulation material and the indoor-side surface of the cross-beam thermal insulation material. is characterized as

Furthermore, when the film material is stacked, the indoor side of the projecting piece of the heat insulating material fixing fitting is covered with the film material, and the film fastening clip is sandwiched between the projecting piece from the indoor side. The film material can be fixed.

By using the heat insulating material fixture disclosed by the present application, a board-shaped heat insulating material can be simply and efficiently built into a steel frame beam having at least one flange in the direction perpendicular to the flange.

In addition, using the heat insulating material fixing fittings, a board-shaped under beam heat insulating material is erected under the steel frame beam placed on the outer peripheral part of the steel frame building, and the indoor surface of the under beam heat insulating material is In addition to protruding to the indoor side from the side edge of the lower flange of the steel beam, a board-shaped beam-crossing thermal material is also fitted on the indoor side of the steel beam, so that the indoor surface of the beam-crossing thermal material and the beam By aligning the surface of the lower heat insulating material on the indoor side, it is possible to efficiently construct a seamless heat insulating line between the frame framework of the outer peripheral part of the steel frame building and the inner wall foundation.

Furthermore, the airtightness, moistureproofness, fireproofness, etc. of the steel-framed building can be improved by stacking a film material for the purpose of airtightness, moistureproofness, fireproofness, etc. on the indoor side of the insulation line.

In the case of stacking the film material, the film material can be efficiently stacked on the indoor side of the insulation line by using the heat insulating material fixing fitting with the carry-out piece extending from the back of the clip portion together with the film fastening clip. .

BRIEF DESCRIPTION OF THE DRAWINGS It is the front view (a), top view (b), side view (c), and bottom view (d) of the heat insulating material fixing metal fitting which concerns on 1st Embodiment of the invention which this application discloses. It is the top side perspective view (a) and bottom side perspective view (b) of the heat insulating material fixing metal fitting which concerns on the said 1st Embodiment. Fig. 3 is a cross-sectional view of a main part around a steel frame beam showing a heat insulating structure of a steel frame building using the heat insulating material fixing bracket according to the first embodiment; It is the top view (a), side view (b), and bottom view (c) of the heat insulating material fixing metal fitting which concerns on 2nd Embodiment of invention which this application discloses. It is the upper-surface side perspective view (a) and lower-surface side perspective view (b) of the heat insulating material fixing metal fitting which concerns on the said 2nd Embodiment. FIG. 11 is a cross-sectional view of a main part around a steel frame beam showing a heat insulating structure of a steel frame building using the heat insulating material fixing bracket according to the second embodiment. It is the upper-surface side perspective view (a) and lower-surface side perspective view (b) which show the modification of the film fastening clip in the heat insulating material fixing metal fitting which concerns on the said 2nd Embodiment.

Hereinafter, embodiments of the invention disclosed by the present application will be described with reference to the drawings.

<First embodiment>
1 and 2 show the configuration of the heat insulating material fixing bracket according to the first embodiment of the invention disclosed by the present application, and FIG. It shows the fit when fixing the heat insulating material.

As shown in FIG. 3, the heat insulating material fixture 1 is attached to the flange 31 of the steel frame beam 3, and is configured to fix the board-shaped heat insulating material 4 in the direction perpendicular to the plane of the flange 31. As shown in FIG. Here, "steel beam flange" mainly refers to H-shaped steel or similar shaped steel (e.g., channel steel without lip, hat-shaped steel, steel material in which two channel steels are joined back-to-back. ) refers to at least one piece of flat plate-like portion that protrudes substantially horizontally in the cross section perpendicular to the material axis of the beam material. Moreover, the board-shaped heat insulating material is assumed to be a plate having a thickness of several centimeters and mainly made of a hard foaming resin (polystyrene foam, urethane foam, phenol foam, etc.).

The heat insulating material fixing fitting 1 of the exemplary embodiment is a member formed by punching and bending a thin steel plate having spring elasticity, and as shown in FIGS. A clip portion 10 is provided. The pair of clamping pieces 11 and 12 are separated from each other, and the facing distance on the front side (opening side) is slightly smaller than the thickness of the flange 31 of the steel frame beam 3, and the upper and lower clamping pieces 11 and 12 are connected to each other. The distance between them on the back surface 13 side is shaped so that they are slightly larger than the thickness of the flange 31, and processed so that the edge of the flange 31 can be elastically clamped. The depth of at least one of the clamping pieces 11 and 12 is set so as not to exceed the length of protrusion of the clamped flange 31 from the web 32 .

One of the upper and lower clamping pieces 11 (the upper side in the illustrated embodiment) has a retainer piece 14 that can be engaged with a mounting hole (not shown) pre-formed in the flange 31 at an intermediate portion of the clamping piece 11 . is cut and raised inside the clip portion 10 . In order to facilitate attachment to the flange 31, the opening edge of one or both of the upper and lower clamping pieces 11 and 12 may be folded back obliquely to widen the space between them.

Of the pair of clamping pieces 11 and 12, the clamping piece 12 spliced to the outside of the steel beam 3 (lower side in the exemplary embodiment) protrudes in a direction orthogonal to the clamping piece 12 (downward in the exemplary embodiment). A heat insulating material puncture claw 15 is formed by cutting and raising an intermediate portion of the clamping piece 12 . The tip of the heat insulating material puncturing claw 15 is sharpened in a substantially V shape so as to easily puncture the board-shaped heat insulating material 4 .

As shown in FIG. 3, the thermal insulation structure for a steel-framed building according to the invention disclosed in the present application has a frame axis surrounded by steel columns (not shown) and steel beams 3 arranged on the outer periphery of the steel-framed building. A heat insulation line is formed between the frame framework and the inner wall substrate 61 by erecting the board-shaped heat insulating material 4 in the structural surface of the group toward the indoor side. In FIG. 3, reference numeral 62 is an exterior wall material, reference numeral 63 is a panel frame member for connecting the exterior wall material 62 to the building frame, reference numeral 64 is an ALC floor slab on the upper floor, and reference numeral 65 is a ceiling substrate on the lower floor.

In order to realize such a heat insulating structure, the heat insulating material fixing fitting 1 described above is attached to the lower flange 31B of the steel frame beam 3 from the indoor side with the heat insulating material puncturing claw 15 facing downward. The clip portion 10 is sandwiched between the lower flange 31B of the steel beam 3 made of H-shaped steel, and the retaining piece 14 is engaged with the mounting hole formed in the lower flange 31B, so that the heat insulating material fixing fitting 1 is removed from the steel beam 3. It is fixed so as not to fall off easily and not to shift in the material length direction of the steel frame beam 3 .

After a plurality of heat insulating material fixing fittings 1 are attached at suitable intervals in the length direction of the steel frame beam 3, a board-like under beam heat insulating material 4B is erected under the steel frame beam 3. - 特許庁The under-beam heat insulating material 4B is cut in advance so that its height matches the height from the underfloor surface (not shown) of the lower floor of the steel beam 3 to the lower surface of the steel beam 3. The under-beam heat insulating material 4B is slightly inclined and inserted between the steel frame beam 3 and the underfloor surface, the under-beam heat insulating material 4B is lifted so as to be pressed against the steel frame beam 3, and the heat insulating material puncturing claw projecting downward from the clip part 10. The under-beam heat insulating material 4B is fixed to the lower flange 31B of the steel frame beam 3 by piercing the upper end face of the under-beam heat insulating material 4B. When the lower end (not shown) of the under-beam heat insulating material 4B is pushed in directly under the steel beam 3 in this state, the under-beam heat insulating material 4B is erected directly under the steel beam 3 substantially vertically. At this time, the under-beam heat insulating material 4B is preferably erected so that its indoor surface slightly protrudes toward the indoor side from the indoor-side side edge of the lower flange 31B of the steel frame beam 3 .

Furthermore, a board-shaped cross-beam heat member 4A is fitted to the side surface of the steel beam 3 on the indoor side, that is, the recess surrounded by the upper and lower flanges 31T and 31B of the H-shaped steel and the web 32 in the illustrated embodiment. The cross-beam heat insulating material 4A can be made of the same heat insulating material as the under-beam heat insulating material 4B. The cross-beam heating member 4A is cut in advance so that its height dimension is slightly larger than the inner height of the recess, and is fixed by being pushed into the recess. The indoor side surface of the cross-beam heat insulating material 4A also protrudes slightly toward the indoor side from the side edge of the lower flange 31B of the steel frame beam 3, and is substantially flush with the indoor side surface of the under beam heat insulating material 4B. It is preferred that they are mounted in alignment.

The board-shaped heat insulating materials 4 (4A, 4B) attached below and to the sides of the steel beams 3 in this way ensure that there is no break between the framework of the outer peripheral portion of the steel frame building and the inner wall foundation 61. An insulation line is formed. By making the indoor surfaces of the under-beam heat insulating material 4B and the cross-beam heat insulating material 4A protrude slightly toward the indoor side from the side edges of the lower flanges 31B of the steel beams 3, the lower flanges 31B of the steel beams 3 form the insulation line. It is possible to prevent it from protruding to the indoor side and becoming a thermal bridge. Adjacent portions between the under beam heat insulating material 4B and the beam crossing heat insulating material 4A may be covered with an appropriate tape. It is not necessary to join the cross-beam heating material 4A with a tape or the like.

On the indoor side of this heat insulating line, an appropriate film material 5 for the purpose of air tightness, moisture resistance, fire resistance, etc., can be laminated. If the overlapping portions of the film material 5 are sealed with tape or the like, an enclosing surface having functions such as airtightness, moistureproofness, and fireproofing is formed immediately on the indoor side of the heat insulation line. When stacking the film material 5, the edge of the film material 5 stacked on the under-beam heat insulating material 4B and the edge of the film material 5 overlaid on the beam-crossing heat insulating material 4A are aligned with the under-beam heat insulating material 4B and the beam. It is more preferable to stick it at a position that does not overlap the portion adjacent to the transverse heating member 4A.

<Second embodiment>
4 and 5 show the configuration of the heat insulating material fixing bracket according to the second embodiment of the invention disclosed by the present application, and FIG. It shows the fit when fixing the heat insulating material.

As in the first embodiment, the heat insulating material fixing fitting 1 according to this embodiment is also a member formed by punching and bending a sheet of thin steel plate having spring elasticity. and a heat insulating material puncture claw 15 that protrudes in a direction perpendicular to the clamping piece 11 (downward in the exemplary embodiment) by cutting and raising one clamping piece 11 (lower side in the exemplary embodiment). In addition, it is provided with a carry-out piece 16 extending from the rear surface 13 of the clip portion 10, and is configured by combining a film fastening clip 20 formed separately from the clip portion 10. - 特許庁

The carrying piece 16 of the exemplary embodiment is a substantially rectangular flat plate piece when viewed from the top. It is formed by folding back in the extending direction of the flange 31 held by the clip portion 10, starting from the intermediate portion in the height direction. Two corners on the rear side of the carry-out piece 16 are rounded to prevent the film material 5 from being broken.

The film fastening clip 20 includes a flat top piece 21 that is substantially rectangular in top view, a pair of side pieces 22 extending downward from both side edges of the top piece 21, and a pair of side pieces 22 extending downward from the rear edge of the top piece 21. A fitting groove 24 is formed between the top piece 21 and the side pieces 22, 22 so that the carrying piece 16 on the clip part 10 side can be fitted. . The fitting groove 24 is formed by sloping the upper side of the side piece 22 in a gentle mountain shape. The two corners on the front side of the top piece 21 and the edges on the front side of the side pieces 22, 22 are also R-processed so as not to tear the film material 5. - 特許庁

As in the first embodiment, this heat insulating material fixing fitting 1 is also configured such that the lower flange 31B of the steel frame beam 3 arranged on the outer peripheral portion of the steel frame building holds the clip portion 10 from the indoor side, and the heat insulating material puncture claw 15 can be installed facing down. A board-shaped under-beam heat insulating material 4B is built under the steel beam 3, and a downwardly protruding heat insulating material puncturing claw 15 is pierced into the upper end surface of the under-beam heat insulating material 4B to fix the under-beam heat insulating material 4B. be done. Furthermore, a board-shaped cross-beam heat member 4A is fitted to the side surface of the steel frame beam 3 on the indoor side. The indoor-side surface of the under-beam heat insulating material 4B and the indoor-side surface of the beam-crossing heat insulating material 4A slightly protrude toward the indoor side from the side edge of the lower flange 31B of the steel frame beam 3, and are substantially flush with each other. aligned.

Similarly to the first embodiment, the film material 5 for the purpose of air tightness, moisture resistance, fire resistance, etc. is laminated on the indoor side of the heat insulation line thus formed. However, in this second embodiment, the protruding piece 16 of the heat insulating material fixing fitting 1 is held so as to protrude slightly toward the indoor side from the adjacent portion of the under beam heat insulating material 4B and the cross-beam heat insulating material 4A. The indoor side is covered with the film material 5, and the film material 5 is fastened to the heat insulating material fixture 1 by clamping the film fastening clip 20 between the carry-out piece 16 from the indoor side. By using the heat insulating material fixture 1 having such a carry-out piece 16, the film material 5 can be efficiently stacked on the indoor side of the heat insulating line.

In the form shown in FIG. 6, the heat insulating material fixing bracket 1B having no heat insulating material puncture claw 15 is attached to the upper flange 31T of the steel frame beam 3 from the indoor side, and the carrying out shape formed on the heat insulating material fixing bracket 1B is attached to the upper flange 31T of the steel beam 3. The piece 16 is covered with the film material 5 and fastened with a film fastening clip 20. - 特許庁

FIG. 7 shows another configuration example of the film fastening clip. The exemplified film fastening clip 20B has a shape in which a long rectangular thin steel plate having spring elasticity is folded at the intermediate portion, and each corner on the opening side is rounded, and one opening edge 25 is rounded. It is diagonally folded back to the widening side. The film material 5 can be fastened to the carry-out piece 16 even with the film fastening clip 20 having such a simple form.

The mating carry-out piece 16 is not limited to the flat shape as described above. It may be formed on one side or both sides. Also, the planar shape is not limited to a rectangle, and for example, a semi-elliptical shape, a semi-elliptical shape, or other shapes can be selected. The shape of the film fastening clip 20 may be modified appropriately according to the shape of the carry-out piece 16 .

As described above, if the heat insulating material fixing bracket 1 disclosed in the present application is used, the board-shaped heat insulating material 4 is attached to the steel beam 3 having at least one flange 31 in the direction perpendicular to the flange 31. Easy and efficient to build. In addition, using the heat insulating material fixing fitting 1, a board-shaped under-beam heat insulating material 4B is erected under the steel frame beam 3 arranged in the outer peripheral part of the steel frame building, and the under beam heat insulating material 4B is installed on the indoor side. The surface of the steel frame beam 3 is protruded toward the indoor side from the side edge of the lower flange 31B of the steel frame beam 3, and the board-shaped beam crossing heat material 4A is also fitted to the side surface of the steel frame beam 3 on the indoor side. By aligning the indoor side surface of the material 4A and the indoor side surface of the under-beam heat insulating material 4B flush with each other, a seamless heat insulating line is formed between the frame framework of the outer peripheral part of the steel frame building and the inner wall foundation 61. can be constructed efficiently. Furthermore, the airtightness, moistureproofness, fireproofness, etc. of the steel frame building can be improved by stacking the film material 5 on the indoor side of the insulation line for the purpose of airtightness, moistureproofness, fireproofness, etc.

The technical scope of the invention disclosed in the present application should not be construed as being limited by the illustrated embodiments, but should be construed conceptually based on the description of the claims. The illustrated configuration of the heat insulating material fixing bracket and the heat insulating structure of the steel frame building is an example, and when implementing the invention disclosed in the present application, the detailed shapes and dimensions of the components that are not specifically specified in the scope of claims , structure, material, quantity, form of connection with other elements, relative positional relationship, etc., can be appropriately modified within a range in which effects substantially equal to or greater than those of the exemplified form can be obtained.

INDUSTRIAL APPLICABILITY The invention disclosed in the present application can be widely used for heat insulation construction methods for steel-framed buildings.

1 Insulation material fixing fitting 10 Clip part 11 Clamping piece 12 Clamping piece 13 Back surface 14 Retaining piece 15 Insulation material puncturing claw 16 Carrying piece 20 Film fastening clip 21 Upper surface piece 22 Side piece 23 Back piece 24 Fitting groove 25 Opening edge 3 Steel frame Beam 31 flange (31B lower flange, 31T upper flange)
32 Web 4 Insulation material (4A cross-beam heat insulation material, 4B under-beam heat insulation material)
5 film material 61 inner wall base 62 outer wall material 63 panel frame material 64 ALC floor slab 65 ceiling base

Claims (7)

A heat insulating material fixing fitting for fixing a board-shaped heat insulating material attached to the flange of a steel beam having at least one flange and erected in the direction perpendicular to the flange,
a clip portion having a pair of clamping pieces capable of elastically clamping the edge of the flange;
a heat insulating material puncturing nail protruding from one of the pair of clamping pieces in a direction perpendicular to the clamping piece;
A heat insulating material fixing bracket comprising: In the heat insulating material fixing bracket according to claim 1,
a lead-out piece extending from the rear surface of the clip portion in the extension direction of the flange;
a film fastening clip that is formed separately from the clip portion and can hold the take-out piece from both sides;
A heat insulating material fixing bracket comprising: In the heat insulating material fixing bracket according to claim 1 or 2,
A retaining piece that can be engaged with a mounting hole formed in the flange is formed on at least one of the pair of clamping pieces. The heat insulating material fixing fitting according to any one of claims 1 to 3 is attached to the lower flange of a steel frame beam arranged in the outer peripheral portion of a steel frame building, and the clip portion is sandwiched between the lower flange from the indoor side. , mounted with the heat insulating material puncture claw facing downward,
A board-shaped under-beam heat insulating material is built under the steel frame beam, and the heat insulating material puncturing claw of the heat insulating material fixing fitting is pierced into the upper end surface of the under-beam heat insulating material. is fixed to the lower flange of the steel beam. In the heat insulation structure of the steel frame building according to claim 4,
The under-beam heat insulating material is erected so that its indoor surface protrudes toward the indoor side from the indoor-side side edge of the lower flange of the steel beam,
A board-shaped cross-beam heating material is also fitted on the side surface of the steel frame beam on the indoor side,
A thermal insulation structure for a steel-frame building, wherein the indoor surface of the under-beam thermal insulation material and the indoor-side surface of the cross-beam thermal insulation material are flush with each other. In the heat insulation structure of the steel frame building according to claim 5,
A steel frame building characterized in that a film material for the purpose of airtightness, moisture-proofing, or fire resistance is laminated over the indoor surface of the under-beam heat insulating material and the indoor surface of the cross-beam heat insulating material. Insulated structure. In the heat insulation structure of the steel frame building described in claim 6 citing claim 2,
The indoor side of the projecting piece of the heat insulating material fixing fitting is covered with the film material, and the film material is fixed by sandwiching the film fastening clip between the projecting piece from the indoor side. Thermal insulation structure of steel frame building.

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