JP5096053B2 - Bonding structure of steel-clad insulation panels for fireproof partition walls - Google Patents

Description

The present invention relates to a joint structure of the refractory partition wall steel clad insulation panel stretched and coated steel plate heat insulating material.

Currently, technologies using steel-clad insulation panels for fire-resistant partition walls with coated steel sheets as thermal insulation materials (Patent Documents 1 and 2) include residences, office buildings, public facilities, commercial facilities, production factories, distribution warehouses, etc. Has been applied.
In particular, due to the increase in capital investment accompanying the recent recovery in business performance of companies, the sales route has been shortened due to the rapid increase in production plant facilities such as automobiles and foods, and sales of telecommunications nets, and systems such as systems that deliver goods directly to consumers. Due to the trend, the demand for construction of logistics warehouses including refrigerated warehouses is increasing rapidly.
However, since many of these buildings handle a large amount of combustible material, construction technology based on a more advanced insulation method that takes into consideration safety in the event of a fire and environmental issues is required.

On the other hand, the weak point of the building using the steel plate tension heat insulation panel for fireproof partition walls exists in the junction part of the heat insulation panel. That is, the joint is thermally expanded and deformed due to high heat during a fire, and a gap is formed in the joint due to the opening of the coated steel plate, etc., and the spread of fire spreads through the flame and radiant heat through the non-heated surface.
JP2003-064804 JP 2002-364104 A

  The present invention has been devised in view of the above circumstances, and an object of the present invention is to prevent the spread of a building during a fire in a building using a steel-clad insulation panel for fireproof partition walls.

In order to achieve the above object, the present invention provides a heat insulating body having a rectangular cross section having a thickness, a width and a length greater than the thickness, and two outer steel plates covering both surfaces of the heat insulating body in the thickness direction. a plurality of refractory partition wall steel clad insulation panel consisting of a joint structure for joining at both ends thereof in the width direction, extend over the entire length in the length direction of the thermal insulating material body in the width direction of the one end of the thermal insulating material body the first steel sheet of the channel to be standing is provided, a second steel plate of the channel extending over the entire length in the length direction of the thermal insulating material body in the width direction of the other end of the thermal insulating material body is provided, said At one end in the width direction of the heat insulating material body, the outer steel plates covering both sides of the heat insulating material body in the thickness direction extend on the extension in the width direction of the heat insulating material body, and then are folded back inward in the thickness direction. is a pair of folded portions, the first Steel sheet, web aligned with the one end surface of the width direction of the thermal insulating material body is sandwiched by the inner surface of the outer steel plate face each other flanges at both ends constituting the folded portion is attached by spot welding, the heat insulating material The other end in the width direction of the main body is a thin portion in which both end portions in the thickness direction are recessed in the thickness direction and thinner than other portions, and the thickness of the heat insulating material main body in the thin portion Each of the outer steel plates covering both sides in the direction extends inward in the thickness direction of the main body of the heat insulating material, then extends along the thin wall portion, rises toward the outer side in the width direction, and is inserted into the inside of the pair of folded portions. A pair of upright portions facing each other in a dimension,
In the second steel plate, the web is aligned with the end surface of the thin portion , the flanges at both ends are overlapped with the inner surface of the upright portion, and are attached by spot welding. The steel plate for the fireproof partition wall of the other of the two steel plate-clad thermal insulation panels for the fire-resistant partition wall between the pair of folded portions of the steel-plate-clad thermal insulation panel for the fireproof partition wall of the steel plate-clad thermal insulation panel The pair of upright portions of the tension heat insulation panel is inserted, and between the pair of folded portions , the first steel plate web and the second steel plate web have heat insulation and fire resistance. and gap closing heat-insulating material for closing the gap between the heat insulating material body of the refractory partition wall steel clad insulation panel adjacent a fire is loaded over the entire length in the length direction of the thermal insulating material body, the width direction The steel plate-clad thermal insulation panel for the fire-resistant partition wall is disposed inside the pair of folded portions of the steel-clad thermal insulation panel for the fire-resistant partition wall of the two adjacent steel-clad thermal insulation panels for the fire-resistant partition wall. In a state where the pair of upright portions are inserted, each of the first steel plates from the outside of the outer steel plate that covers both sides in the thickness direction of the heat insulating body of the steel plate-clad heat insulating panel for one of the adjacent fireproof partition walls. Tapped over the folded portion sandwiched by the flange, the upright portion of the other adjacent steel plate-clad insulation panel for fireproof partition walls, and the flange of the second steel plate attached to the upright portion on the inner surface It is characterized by having been screwed in.

According to the joining structure of the steel-clad heat insulation panel for fireproof partition walls of the present invention, the gap closing heat insulating material is interposed between the end portions in the width direction of the heat insulating body through the first steel plate and the second steel plate. It is loaded over the entire length of the main body.
Therefore, it goes without saying that the ends in the width direction of the steel plate covering both surfaces in the thickness direction of the main body of the heat insulating material are connected by the first steel plate and the second steel plate to form a strong structure. It is securely held by the first steel plate and the second steel plate, and it is reliably prevented that the joint portion undergoes thermal expansion deformation due to high heat at the time of fire and a gap is formed, and the flame and radiant heat are passed through the non-heating surface. It becomes possible to prevent the spread of fire spread.
Also, the first and second steel plates can be attached easily and reliably by using double-sided steel plates to reduce the cost of the steel-clad insulation panel for fireproof partition walls and the joining structure thereof. But it is advantageous.

Hereinafter, the joining structure of the steel-clad insulation panel for fireproof partition walls and the steel-clad insulation panel for fireproof partition walls according to embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
First, with reference to FIG. 1, it demonstrates from the steel plate tension heat insulation panel 12 for fireproof partition walls of 1st Embodiment.
FIG. 1 is a perspective view of a steel-clad insulation panel 12 for fireproof partition walls.
The fire-resistant partition wall steel plate-clad heat insulation panel 12 has a thickness, a heat insulation body 14 having a rectangular cross section having a width and length larger than the thickness, and a steel plate 16 covering both surfaces of the heat insulation body 14 in the thickness direction. Furthermore, a groove-shaped first steel plate 20 is provided at one end in the width direction of the heat insulating material main body 14, and a groove-shaped second steel plate 22 is provided at the other end in the width direction of the heat insulating material main body 14. It has been.
In the first embodiment, the other end in the width direction of the fire-resistant partition wall steel plate-clad heat insulation panel 12 has a thin portion 12A in which both end portions in the thickness direction are recessed in the thickness direction and thinner than other portions. It has become.
The heat insulating material body 14 has heat insulating properties and fire resistance. Examples of such a heat insulating material main body 14 include a foamed resin heat insulating material such as urethane foam, and a mineral fiber heat insulating material such as rock wool. Conventionally known materials such as the above can be used, the thickness of the heat insulating material body 14 is 30 mm to 250 mm, the width is 900 mm to 1000 mm, and the length is about 3000 mm to 12000 mm.
Further, as the steel plate 16, for example, a conventionally known material such as a galvanium steel plate can be used, and the thickness is 0.5 mm to 1.0 mm.
The steel plate 16 is attached to the surface of the heat insulating body 14 by a conventionally known means such as using an adhesive.

The steel plate 16 extends over the width direction of the heat insulating material body 14 at one end in the width direction of the heat insulating partition wall steel plate-clad heat insulating panel 12 at both ends in the width direction, and then folded inward. A return folding portion 1602 is provided.
In addition, the thin portion 12A, which is the other end in the width direction of the heat insulating material body 14, is provided with an upright portion 1604 that rises toward the outer side in the width direction after the steel plate 16 extends inward in the thickness direction.

The first steel plate 20 is attached to a steel plate 16 that covers both sides of the heat insulating material body 14 in the thickness direction.
In the first steel plate 20, the web 2002 is aligned with one end face in the width direction of the heat insulating material body 14, and the flanges 2004 at both ends are positioned in the vicinity of both surfaces of the heat insulating material body 14 in the thickness direction of the heat insulating material body 14. ing.
In the present embodiment, the flanges 2004 at both ends are respectively inserted and disposed inside the folded portion 1602, and the steel plate 16 portion constituting the folded portion 1602 and the flange 2004 at both ends are overlapped and attached by spot welding. Has been.
As the first steel plate 20, a galvanized steel plate or a coated steel plate is used, and the thickness is 0.5 mm to 1.0 mm.

The second steel plate 22 is attached to the steel plate 16 that covers both surfaces of the heat insulating body 14 in the thickness direction.
The web 2202 of the second steel plate 22 is matched with the end face of the heat insulating material body 14 constituting the thin portion 12A.
Further, the flanges 2204 at both ends of the second steel plate 22 protrude from the web 2202 toward one end in the width direction (inward in the width direction of the steel-clad insulation panel for fireproof partition wall 12). The first steel plate 20 is opposed to each other with dimensions inserted inside the flanges 2004 at both ends of the first steel plate 20.
In the present embodiment, the flanges 2204 at both ends are disposed so as to overlap each other on the inner surface of the upright portion 1604, and the upright portion 1604 and the flanges 2204 at both ends are attached by spot welding.
A galvanized steel plate or a coated steel plate is used for the second steel plate 22 as in the first steel plate 20, and the thickness is 0.5 mm to 1.0 mm.
In addition, the 1st steel plate 20 and the 2nd steel plate 22 may extend over the full length of the length direction of the heat insulating main body 14, respectively. Alternatively, a plurality of first steel plates 20 and second steel plates 22 may be provided at intervals in the length direction of the heat insulating body 14. In this case, the length of the first steel plate 20 and the second steel plate 22 along the length direction of the heat insulating body 14 is, for example, about 3 cm and is arranged at a pitch of about 15 to 30 cm.

Next, with reference to FIG. 2 and FIG. 3, the joining structure of the steel plate tension heat insulation panel 12 for fireproof partition walls of 1st Embodiment is demonstrated.
2 and 3 are cross-sectional plan views of the joining structure of the steel-clad insulation panel 12 for fireproof partition walls according to the embodiment.
The second steel plate 22 of the other steel plate-clad heat insulation panel 12 for the other fire-resistant partition wall inside the flange 2004 at both ends of the first steel plate 20 of the steel plate-clad heat insulation panel 12 for the one fire-resistant partition wall adjacent in the width direction. In the first embodiment, the thin portion 12A is inserted inside the flanges 2004 at both ends.
During the insertion, between the flanges 2004 at both ends of the first steel plate 20 and between the web 2002 of the first steel plate 20 and the web 2202 of the second steel plate 22, it has heat insulation and fire resistance. A felt-like or matte-like gap closing heat insulating material 24 that closes the gap between the heat insulating main bodies 14 of the steel plate-clad heat insulating panels 12 for the fire-resistant partition walls adjacent to each other during a fire is loaded over the entire length of the heat insulating main body 14 in the length direction. Is done.
The gap closing heat insulating material 24 has heat insulating properties and fire resistance. As such a gap closing heat insulating material 24, for example, a foamed resin heat insulating material such as urethane foam, or a mineral fiber such as rock wool Conventionally known materials such as heat insulating materials can be used, but using rock wool is advantageous in solving environmental problems of dust generation and corrosion of steel sheets due to sulfur content.
With such a joining structure, a plurality of steel plate-clad heat insulation panels 12 for fireproof partition walls are arranged in a straight line, and fireproof partition walls are constructed.
In this Embodiment, the steel plate tension heat insulation panel 12 for fireproof partition walls is arranged with the pitch P of 150 mm to 200 mm.
In addition, conventionally well-known various means, such as using an upper and lower runner, are applied for the installation to the building frame of the steel plate tension heat insulation panel 12 for fireproof partition walls, and the code | symbol 26 shows a decorative board in FIG.

According to the joining structure of the steel plate-clad heat insulation panel 12 for fireproof partition walls according to the present embodiment, the first steel plate 20 and the second steel plate 22 are provided at both ends in the width direction of the heat insulating body 14, and the width direction The flanges 2204 at both ends of the other adjacent fire-resistant partition wall steel plate-clad heat insulation panel 12 are arranged inside the flanges 2004 at both ends of the one adjacent steel plate-clad heat insulation panel 12 for the fire-resistant partition wall in FIG. Between the web 2002 and the web 2202 of the second steel plate 22, a gap closing heat insulating material 24 that closes the gap between the heat insulating main bodies 14 of the steel-clad heat insulating panel 12 for fire-resistant partition walls adjacent to each other in a fire is loaded. The
Therefore, the joining of the steel plate-clad heat insulation panel 12 for fireproof partition walls can be easily performed.
Of course, the end portions in the width direction of the steel plate 16 covering both sides in the thickness direction of the heat insulating material main body 14 are connected to each other by the first steel plate 20 and the second steel plate 22 to form a strong structure. The heat insulating material 24 is securely held by the first steel plate 20 and the second steel plate 22.
Therefore, it is possible to reliably prevent the joint portion from undergoing thermal expansion deformation due to high heat at the time of a fire and to generate a gap, and it is possible to prevent the spread of fire spread by passing the flame and radiant heat through the non-heated surface.
Moreover, the attachment of the first steel plate 20 and the second steel plate 22 to both ends in the width direction of the heat insulating material body 14 is also easy and inexpensive by using the steel plates 16 that cover both surfaces of the heat insulating material body 14 in the thickness direction. Therefore, it is advantageous to reduce the costs of the steel-clad heat insulating panel 12 for fireproof partition walls and the joining structure thereof.
Therefore, the joining structure of the steel plate-clad heat insulation panel 12 for fireproof partition walls and the steel plate-clad heat insulation panel 12 for fireproof partition walls according to the present embodiment include office buildings, public facilities, commercial facilities, production factories that handle a large amount of combustible materials, It is particularly suitable for a distribution warehouse.

Next, a modification of the first embodiment will be described.
FIG. 4 shows a cross-sectional plan view of a joining structure of a steel plate-clad heat insulating panel 12 for a fireproof partition wall according to a modification.
In the modification shown in FIG. 4, the other adjacent fire-resistant partition wall steel plate-clad heat insulation panel 12 is disposed inside the flange 2004 at both ends of the first steel plate 20 of the adjacent one steel plate-clad heat insulation panel 12 for fire-resistant partition wall. With the flanges 2204 at both ends of the second steel plate 22 inserted, the tapped screws 30 are driven from the outside of the flanges 2004 at both ends of the first steel plate 20 to the flanges 2204 of the second steel plate 22, respectively. As such a tapped screw 30, for example, Tegs screw or the like can be adopted.
By using such a tapped screw 30, the first steel plate 20 and the second steel plate 22 facing each other at the joint can be easily and reliably connected. The structure of the joint portion can be made stronger, the structure for holding the gap closing heat insulating material 24 becomes stronger, which is more advantageous in preventing the spread of fire spread.

Next, another modification will be described.
FIG. 5 shows a cross-sectional plan view of a joining structure of a steel plate-clad heat insulating panel 12 for a fireproof partition wall according to a modification.
In the modification shown in FIG. 5, a heat-sensitive expansion material 24 </ b> A is used as the gap closing heat insulating material 24.
As such heat-sensitive expansion material 24A, a conventionally known material such as Sekisui Chemical Co., Ltd. trade name “Fibloc” (carbon graphite-based material) can be used. By using it, it expands due to heat at the time of fire, and the gap between the heat insulation main bodies 14 of the steel-clad insulation panel for fireproof partition wall 12 is surely closed, and flame and radiant heat are brought to the non-heated surface as in the embodiment. It becomes possible to prevent the spread of fire spread by passing, and since the volume is small at normal temperature, the heat-sensitive expansion material 24A can be easily arranged.

(Second Embodiment)
Next, a second embodiment will be described.
First, with reference to FIG. 6, the steel plate tension heat insulation panel 12 'for fireproof partition walls of 2nd Embodiment is demonstrated.
FIG. 6 shows a perspective view of a steel-clad insulation panel 12 'for fireproof partition walls.
When the same parts and members as those in the first embodiment are described with the same reference numerals, the steel-clad insulation panel for fireproof partition walls 12 'has a thickness and a cross section having a width and length larger than the thickness. A rectangular heat insulating body 14 and a steel plate 16 covering both sides of the heat insulating body 14 in the thickness direction are provided, and a groove-shaped first steel plate 20 is provided at one end in the width direction of the heat insulating body 14. A groove-shaped second steel plate 22 is provided at the other end in the width direction of the heat insulating body 14.
The properties, shape, size, and mounting structure of the heat insulating body 14 and the steel plate 16 are the same as those in the first embodiment.

The steel plate 16 extends over the widthwise extension of the heat insulating material body 14 at one end in the width direction of the steel plate-clad heat insulating panel 12 'for the fireproof partition wall and extends inward after extending over the width direction extension of the heat insulating material main body 14. A return portion 1602 is provided.
Further, the steel plate 16 extends inwardly on the end surface in the width direction of the heat insulating material body 14 at both ends in the thickness direction of the heat insulating material main body 14 at the other end in the width direction of the steel plate-clad heat insulating panel 12 'for fireproof partition walls. A standing portion 1604 that rises toward the outside in the width direction is provided.

The first steel plate 20 is attached to a steel plate 16 that covers both sides of the heat insulating material body 14 in the thickness direction.
In the first steel plate 20, the web 2002 is aligned with one end face in the width direction of the heat insulating material body 14, and the flanges 2004 at both ends are positioned in the vicinity of both surfaces of the heat insulating material body 14 in the thickness direction of the heat insulating material body 14. ing.
In the present embodiment, the flanges 2004 at both ends are respectively inserted and disposed inside the folded portion 1602, and the steel plate 16 portion constituting the folded portion 1602 and the flanges 2004 at both ends are attached by spot welding. Yes.

The second steel plate 22 is attached to the steel plate 16 that covers both surfaces of the heat insulating body 14 in the thickness direction.
The second steel plate 22 is opposed so that the web 2202 is aligned with the other end surface in the width direction of the heat insulating body 14 and the flanges 2204 at both ends are inserted inside the flanges 2004 at both ends of the first steel plate 20. ing.
In the second embodiment, flanges 2204 protrude from both ends of the web 2202 toward the outside in the width direction of the fire-resistant partition wall steel plate-clad heat insulation panel 12 ′.
In the present embodiment, the flanges 2204 at both ends are respectively inserted and disposed inside the standing portions 1604, and the standing portions 1604 and the flanges 2204 at both ends are attached by spot welding.
In addition, the property, thickness, etc. of the 1st steel plate 20 and the 2nd steel plate 22 are the same as that of 1st Embodiment, and the 1st steel plate 20 and the 2nd steel plate 22 are the heat insulating material main bodies 14, respectively. You may extend over the full length of a length direction, or you may make it provide two or more in the length direction of the heat insulating material main body 14 at intervals.

Next, with reference to FIG. 7 and FIG. 8, the joining structure of the steel-clad insulation panel 12 'for fireproof partition walls is demonstrated.
7 and 8 are cross-sectional plan views of the joint structure of the steel plate-clad heat insulation panel 12 'for fireproof partition walls according to the embodiment, respectively.
On the inside of the flange 2004 at both ends of the first steel plate 20 of one adjacent fire-resistant partition wall steel plate-clad insulation panel 12 ', the second steel plate 22 of the other adjacent fire-resistant partition wall steel plate-clad insulation panel 12' is provided. The flanges 2204 at both ends are inserted.
During the insertion, between the flanges 2004 at both ends of the first steel plate 20, between the web 2002 of the first steel plate 20 and the web 2202 of the second steel plate 22, for a fireproof partition wall adjacent in a fire. A heat insulation material 24 for closing the gap similar to the first embodiment in the form of a felt or mat that closes the gap between the heat insulation main bodies 14 of the steel plate-clad insulation panel 12 extends over the entire length of the heat insulation main body 14 in the length direction. Loaded.
With such a joining structure, a plurality of steel-board-clad heat insulation panels 12 'for fireproof partition walls are arranged in a straight line, and fireproof partition walls are constructed.
In the present embodiment, the steel plate-clad heat insulation panels 12 'for fireproof partition walls are arranged at a pitch P of 150 mm to 200 mm, as in the first embodiment.
Such a second embodiment also provides the same effects as the first embodiment, particularly in office buildings, public facilities, commercial facilities, production factories, distribution warehouses, etc. that handle a large amount of combustible materials. Preferred.

Next, a modification of the second embodiment will be described.
FIG. 9 shows a cross-sectional plan view of a joining structure of a steel plate-clad heat insulating panel 12 'for a fireproof partition wall according to a modification.
In the modification shown in FIG. 9, the other adjacent fire-resistant partition wall steel plate-clad heat insulation panel 12 on the inner side of the flange 2004 at both ends of the first steel plate 20 of one adjacent fire-resistant partition wall steel plate-clad insulation panel 12 ′. In the state where the flanges 2204 at both ends of the second steel plate 22 are inserted, the tapped screws 30 are driven from the outside of the flanges 2004 at both ends of the first steel plate 20 over the flanges 2204 of the second steel plate 22, respectively. As such a tapped screw 30, for example, Tegs screw or the like can be adopted.
By using such a tapped screw 30, the first steel plate 20 and the second steel plate 22 facing each other at the joint can be easily and reliably connected. The structure of the joint portion can be made stronger, the structure for holding the gap closing heat insulating material 24 becomes stronger, which is more advantageous in preventing the spread of fire spread.

Next, another modification of the present embodiment will be described.
FIG. 10 shows a cross-sectional plan view of a joining structure of a steel plate-clad heat insulating panel 12 ′ for a fireproof partition wall according to a modification.
In the modification shown in FIG. 10, the heat-sensitive expansion material 24 </ b> A similar to the first embodiment is used as the gap closing heat insulating material 24.

Various attachment structures for the first steel plate 20 and the second steel plate 22 are conceivable.
For example, in the first embodiment, as shown in FIG. 11, the inner surface of the portion of the steel plate 16 that covers both surfaces in the thickness direction of the heat insulating material body 14 and protrudes from one end in the width direction of the heat insulating material body 14. In addition, the flanges 2004 at both ends of the first steel plate 20 may be attached by spot welding, and the web 2002 may be aligned with one end face in the width direction of the heat insulating body 14. Further, the second steel plate 22 may be attached by spot welding with the flanges 2204 at both ends overlapped on the outer surface of the upright portion 1604, respectively.
Also in the second embodiment, for example, as shown in FIG. 12, a portion of the steel plate 16 that covers both surfaces in the thickness direction of the heat insulating material body 14 and protrudes from one end portion in the width direction of the heat insulating material body 14. The flanges 2004 at both ends of the first steel plate 20 may be overlapped and attached to the inner surface of the first steel plate 20 by spot welding, and the web 2002 may be aligned with one end surface in the width direction of the heat insulating body 14.

It is a perspective view of the steel plate tension heat insulation panel for fireproof partition walls concerning a 1st embodiment. It is a cross-sectional top view of the junction structure of the steel plate tension heat insulation panel for fireproof partition walls of 1st Embodiment. It is a cross-sectional top view of the junction structure of the steel plate tension heat insulation panel for fireproof partition walls of 1st Embodiment. It is a cross-sectional top view of the junction structure of the steel plate tension heat insulation panel for fireproof partition walls of a modification. It is a cross-sectional top view of the junction structure of the steel plate tension heat insulation panel for fireproof partition walls of a modification. It is a perspective view of the steel plate tension heat insulation panel for fireproof partition walls which concerns on 2nd Embodiment. It is a cross-sectional top view of the junction structure of the steel plate tension heat insulation panel for fireproof partition walls of 2nd Embodiment. It is a cross-sectional top view of the junction structure of the steel plate tension heat insulation panel for fireproof partition walls of 2nd Embodiment. It is a cross-sectional top view of the junction structure of the steel plate tension heat insulation panel for fireproof partition walls of a modification. It is a cross-sectional top view of the junction structure of the steel plate tension heat insulation panel for fireproof partition walls of a modification. It is explanatory drawing of the attachment structure of a 1st, 2nd steel plate. It is explanatory drawing of the attachment structure of a 1st, 2nd steel plate.

Explanation of symbols

  12, 12 ′... Steel fired insulation panel for fireproof partition wall, 14... Heat insulation material, 16... Steel plate, 20... First steel plate, 22.

Claims (3)

A plurality of fire-resistant partition wall steel plates made of a heat insulating material body having a rectangular cross section having a thickness and a width and length larger than the thickness, and two outer steel plates covering both surfaces in the thickness direction of the heat insulating material body A joining structure for joining the heat insulating panels at both ends in the width direction ,
A groove-shaped first steel plate extending over the entire length in the length direction of the heat insulating material body is provided at one end in the width direction of the heat insulating material body ,
The second steel plate of the channel extending over the entire length in the length direction of the thermal insulating material body in the width direction of the other end of the insulating material body is provided,
At one end in the width direction of the heat insulating body, outer steel plates covering both sides in the thickness direction of the heat insulating body extend respectively on the extension in the width direction of the heat insulating body and then be folded back in the thickness direction. A pair of folded portions,
The first steel plate is attached by spot welding with the web aligned with one end surface in the width direction of the heat insulating material body and the flanges at both ends sandwiched between the inner surfaces of the outer steel plates facing each other forming the folded portion. ,
The other end in the width direction of the heat insulating material body is a thin-walled portion in which both end portions in the thickness direction are recessed in the thickness direction and thinner than other portions,
In the thin wall portion, the outer steel plates covering both sides in the thickness direction of the heat insulating material main body extend inward in the thickness direction of the heat insulating material main body, and then extend along the thin wall portion and face outward in the width direction. A pair of upright portions facing each other in a dimension inserted inside the pair of folded portions,
The second steel plate is attached by spot welding with a web aligned with the end surface of the thin portion , and flanges at both ends superimposed on the inner surface of the upright portion,
Between the pair of folded portions of the steel plate-clad heat insulation panel for one fire-resistant partition wall of the two steel plate-clad heat insulation panels for the fire-resistant partition wall adjacent to each other in the width direction, the two steel plate stretches for the fire-resistant partition wall adjacent to each other The pair of upright portions of the steel plate-clad heat insulation panel for the other fireproof partition wall among the heat insulation panels is inserted,
Between the pair of folded portions , between the first steel plate web and the second steel plate web, the steel plate-clad heat insulation panel for a fireproof partition wall that has heat insulation and fire resistance and is adjacent in a fire. Insulating material for closing the gap that closes the gap between the insulating material bodies is loaded over the entire length in the length direction of the insulating material body,
One of the two steel plate-clad heat insulation panels for fireproof partition walls, which is adjacent in the width direction, inside the pair of folded portions of the steel plate-clad thermal insulation panel for fireproof partition walls, and the other steel plate-clad insulation for fireproof partition walls. In a state where the pair of upright portions of the panel are inserted, each of the first ones from the outside of the outer steel plate covering both sides in the thickness direction of the heat insulating material body of the steel plate-clad heat insulating panel for one adjacent fireproof partition wall. Between the folded portion where the flange of the steel plate is sandwiched, the upright portion of the other steel plate-clad heat insulating panel for the fireproof partition wall, and the flange of the second steel plate attached to the inner surface of the upright portion A tapped screw is driven in,
The joining structure of the steel plate tension insulation panel for fireproof partition walls characterized by the above-mentioned. The gap closing heat insulating material is rock wool,
The joining structure of the steel-clad heat insulation panel for fireproof partition walls of Claim 1 characterized by the above-mentioned. The gap insulating heat insulating material is a heat-sensitive expansion material,
The joining structure of the steel-clad heat insulation panel for fireproof partition walls of Claim 1 characterized by the above-mentioned.

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