Fire-resistant interlayer material, fire-resistant method, and fire-resistant structure

Abstract

To provide a fire resistant interlayer material, a fire resistant structure, and a construction method of a fire resistant structure capable of easily and reliably blocking a space formed inside a connecting material connecting an exterior wall and a structural skeleton in an interlayer G which is a gap formed between a floor and an exterior wall of a building, and the interlayer G.SOLUTION: A first core material 110 is inserted through an opening of a connecting material to block a space, a second core material 120 blocks the interlayer G outside the opening of the connecting material, and a connecting portion connects the first core material 110 and the second core material 120.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a fireproof interlayer material, a fireproof method, and a fireproof structure, and particularly relates to a fireproof interlayer material, a fireproof method, and a fireproof structure for closing an interlayer formed between a floor of a building and an outer wall material, and a space formed inside a channel steel connecting the outer wall material and a structural frame of the building.

Background Art

[0002] Conventionally, in high-rise buildings, an outer wall construction method is adopted in which a non-load-bearing wall called a curtain wall is attached to a structural frame such as a foundation or a column so that the wall does not directly bear the load of the building, thereby forming a structure in which the load of the building is not directly borne by the wall.

[0003] In this outer wall construction method, for example, a gap called a joint between members or a predetermined interlayer in the structure is formed between the floor and the outer wall, and this interlayer has become a weak point in terms of fire resistance. When a fire actually occurs, the fire spreads from this interlayer to the upper and lower floors, so it is necessary to close this interlayer.

[0004] In addition, in fireproof buildings including steel-frame buildings, fireproof compartments are installed for the purpose of restricting the spread of fire and smoke within a certain range during a fire. This fireproof compartment prevents fire and smoke from spreading from the space where the fire has occurred to adjacent spaces for a certain period of time, even if a fire occurs in a part of a plurality of spaces divided by, for example, outer walls or partition walls.

[0005] Therefore, a method has been adopted in which a fall-preventing metal fitting is inserted into the interlayer formed between the floor and the outer wall, and a fireproof interlayer material having a waterproof fireproof film on its upper surface is brought into close contact with the floor and the outer wall to close the interlayer formed between the floor and the outer wall and form a fireproof structure (see, for example, Patent Documents 1 and 2).

Prior Art Documents

Patent Documents

[0006] [Patent Document 1] Japanese Patent Application Publication No. 7-42271 [Patent Document 2] Japanese Patent Publication No. 2020-084483 [Overview of the project] [Problems that the invention aims to solve]

[0007] However, conventional fire-resistant structures could not seal off the space formed inside the connecting material that links the floor and the exterior wall. As a result, when a fire broke out, the fire and smoke could spread to the surrounding space through the inside of the connecting material.

[0008] When attaching exterior walls to the structural frame, which consists of the foundation and columns, attaching each exterior wall material to the structural frame one by one is inefficient. Therefore, work efficiency is improved by attaching multiple exterior wall materials, which are pre-connected with connecting members, to the structural frame all at once. Specifically, lip channel steel, which is lightweight, high-strength, and resistant to bending and deflection, and is classified as general structural lightweight steel, is used as the connecting member.

[0009] A lip channel steel has a web section, two flange sections rising vertically from the web section, and two lip sections rising vertically from each flange section to close the two flange sections, with an opening formed between the two lip sections.

[0010] Multiple exterior wall materials are attached and connected to one of the two flange sections of the lip channel steel using bolts or the like. The lip channel steel with multiple exterior wall materials connected is oriented vertically in its longitudinal direction and attached to the structural frame using bolts or the like.

[0011] Conventional fire-resistant interlayer materials can close the gap between the floor and the exterior wall, but they have the problem of not being able to close the lip channel steel in the interlayer used to connect the exterior wall materials.

[0012] Figure 23 is a top view showing a state in which a conventional fire-resistant interlayer material is installed inside the connecting member in the interlayer formed between the outer wall and the floor, which is attached to the floor via a connecting member made of channel steel, and a state in which a conventional fire-resistant interlayer material is installed inside the connecting member in the interlayer formed between the outer wall and the floor, which is attached to the floor via a connecting member made of lip channel steel.

[0013] Figure 23(A) shows a state in which a conventional fire-resistant interlayer material is installed inside the connecting member in the interlayer formed between the outer wall and the floor, which is attached to the floor via a connecting member made of channel steel. As shown in Figure 23(A), an interlayer G is formed between the floor 200 and the exterior wall 300. The exterior wall 300 consists of multiple exterior wall materials 310 attached to one flange portion 322 that rises from the web portion 321 of the connecting member 320, and the other flange portion 323 of the connecting member 320 to which the multiple exterior wall materials 310 are attached is attached to the floor 200. Since the connecting member 320, which is a channel steel, requires strength and rigidity, the web portion 321, flange portion 322, and flange portion 323 are formed from steel of a predetermined thickness.

[0014] Therefore, there is a difference between the inner diameter width of the connecting member 320, which is a channel steel, and the width of the interlayer G, by the thickness of the flange portions 322 and 323. As a result, even if the fire-resistant interlayer material 10 disclosed in Patent Document 1 is pressed into the interior of the connecting member 320 through the opening of the connecting member 320, gaps will remain near the tips of the flange portions 322 and 323, making it impossible to completely close the interlayer G.

[0015] Figure 23(B) shows a state in which a conventional fire-resistant interlayer material is installed inside the connecting member in the interlayer G formed between the outer wall and the floor, which is attached to the floor via a connecting member that is a lip channel steel.

[0016] As shown in Figure 23(B), an interlayer G is formed between the floor 200 and the exterior wall 300. The exterior wall 300 has multiple exterior wall materials 310 attached to one flange portion 322 that rises from the web portion 321 of the connecting member 320, and the other flange portion 323 of the connecting member 320 to which the multiple exterior wall materials 310 are attached is attached to the floor 200. Furthermore, lip portions 324 are formed from the flange portions 322 and 323, respectively, to close their openings.

[0017] When the connecting member 320 is a lip channel steel, the width of the opening of the connecting member 320 is smaller than the width of the interlayer G because the opening is closed by the lip portion 324.

[0018] Therefore, even if a conventional fire-resistant interlaminar material 10 with elasticity is compressed to match the width of the opening of the lip channel steel and pressed into the inside of the lip channel steel, a gap will remain around the lip portion 324, making it impossible to completely close the interlaminar G.

[0019] Therefore, in order to close the space within the lip channel steel in the interlayer G, for example, rock wool processed to the same shape as the space inside the channel steel is packed into the space within the channel steel in the interlayer G.

[0020] Here, for example, if the size of the processed rock wool is smaller than the space inside the channel steel, a problem arises in that the interlayer G in the space inside the channel steel cannot be completely closed.

[0021] Furthermore, because the rock wool is smaller than the space inside the channel steel, there is a problem that it may fall out from where it was packed. If the rock wool falls, a gap will be created between the floors, making it impossible to completely prevent the spread of fire to the upper and lower floors.

[0022] In addition, the work of closing the inside of the lip channel steel in the interlayer G must be done by stuffing rock wool into the very narrow space inside the channel steel provided in the narrow interlayer G between the floor and the outer wall to close it.

[0023] Therefore, instead of working inside the lip channel steel in the very narrow interlayer G, processed rock wool is inserted from the opening of the lip channel steel exposed between the upper and lower floors, and the inserted rock wool is pushed into the interlayer G.

[0024] However, since the inside of the lip channel steel is a place where the interior surrounded by the web part, flange part, lip part, etc. is difficult to see, if the rock wool is pushed down too much, the rock wool may be pushed in below the lower surface of the floor. If the rock wool moves below the lower surface of the floor like this, the interlayer G cannot be completely closed.

[0025] Also, if the rock wool is installed above the upper surface of the floor, this also cannot completely close the interlayer G. Thus, there has been a problem that the space inside the lip channel steel in the interlayer G for connecting the outer wall materials cannot be easily closed.

[0026] The present invention has been made in view of such points, and an object thereof is to provide a fireproof interlayer material, a fireproof structure, and a construction method of a fireproof structure that can easily and surely close the space formed inside the connecting material that connects the outer wall and the structural frame in the interlayer formed between the floor and the outer wall of a building.

Means for Solving the Problems

[0027] In order to solve the above problems, the present invention provides a fire-resistant interlayer material for closing an interlayer formed between the floor and exterior wall material of a building and a space formed inside a channel steel connecting the exterior wall material and the structural frame of the building, characterized in that it comprises a first core material inserted from the opening of the channel steel to close the space, a second core material closing the interlayer outside the opening of the channel steel, and a connecting portion connecting the first core material and the second core material. As a result, the first core material is inserted through the opening of the channel steel to close the space, the second core material closes the space between layers on the outside of the opening of the channel steel, and the first core material and the second core material are connected by a connecting part.

[0028] Furthermore, the present invention provides a fire-resistant method for closing an interlayer space formed between the floor and exterior wall material of a building, and a space formed inside a channel steel connecting the exterior wall material and the structural frame of the building, characterized in that the method comprises the steps of: inserting a first core material from an opening in the channel steel to close the space; and a second core material connected to the first core material via a connecting portion to close the interlayer space outside the opening in the channel steel. As a result, the first core material is inserted through the opening of the channel steel to close the space, and the second core material, which is connected to the first core material via the connecting part, closes the space between layers on the outside of the opening of the channel steel.

[0029] Furthermore, the present invention provides a fire-resistant structure for closing an interlayer space formed between the floor and exterior wall material of a building, and a space formed inside a channel steel connecting the exterior wall material and the structural frame of the building, characterized in that it comprises a first core material inserted from an opening in the channel steel to close the space, a second core material closing the interlayer space outside the opening in the channel steel, and a connecting portion connecting the first core material and the second core material. As a result, the first core material is inserted through the opening of the channel steel to close the space, the second core material closes the space between layers on the outside of the opening of the channel steel, and the first core material and the second core material are connected by a connecting part. [Effects of the Invention]

[0030] According to the fire-resistant interlayer material, fire-resistant method, and fire-resistant structure of the present invention, a first core material is inserted from the opening of the channel steel to close the space, a second core material closes the interlayer outside the opening of the channel steel, and a connecting portion connects the first core material and the second core material. Therefore, the space formed inside the connecting material that connects the outer wall and the structural frame in the interlayer, which is the gap formed between the floor and the outer wall of a building, and the interlayer can be easily and reliably closed. [Brief explanation of the drawing]

[0031] [Figure 1] These are front view, rear view, top view, bottom view, left side view, and right side view showing details of the fire-resistant interlayer material in the first embodiment. [Figure 2] These are rear cross-sectional and top views showing the inter-story space formed between the outer wall, which is attached to the floor via a connecting member made of lip-channel steel, and the floor, as well as the space of the connecting member within the inter-story space. [Figure 3] These are front view, rear view, top view, bottom view, left side view, and right side view showing details of the fall prevention fitting for preventing the fire-resistant interlayer material from falling in the first embodiment. [Figure 4] The rear cross-sectional view and top view show a state in which a support bracket and metal plate for supporting a conventional fire-resistant interlayer material are installed in the interlayer formed between the outer wall, which is attached to the floor via a connecting member that is a lip channel steel, and the floor, and a state in which a fall prevention bracket for preventing the fire-resistant interlayer material from falling in the first embodiment is installed in the space of the connecting member in the interlayer. [Figure 5] These are a rear cross-sectional view and a top view showing a state in which a fall prevention fitting for preventing the fire-resistant interlayer material in the first embodiment from falling is installed in the space of the connecting material between layers, and a state in which the fire-resistant interlayer material in the first embodiment is installed on top of the fall prevention fitting. [Figure 6] These are a rear cross-sectional view and a top view showing the state before the fire-resistant interlayer material is inserted into the space of the connecting material in the first embodiment, and the state after a portion of the fire-resistant interlayer material has been inserted into the space of the connecting material in the first embodiment. [Figure 7]These are a rear cross-sectional view and a top view showing the state after the fire-resistant interlaminar material in the first embodiment has been pressed into the space of the connecting material, and the state after the fire-resistant interlaminar material in the first embodiment has been pressed into the space of the connecting material and the interlaminar space has been closed. [Figure 8] These are a rear cross-sectional view and a top view showing the state after the fire-resistant interlaminar material in the first embodiment has been pressed into and fixed in the space of the connecting material, and the state in which the space of the connecting material and the interlaminar space are closed by the fire-resistant interlaminar material in the first embodiment and the conventional fire-resistant interlaminar material. [Figure 9] These are front view, rear view, top view, bottom view, left side view, and right side view showing details of the fire-resistant interlayer material in the second embodiment. [Figure 10] These are rear cross-sectional and top views showing the interlayer space formed between the outer wall, which is attached to the floor via a connecting member made of lip-channel steel, and the floor, the space of the connecting member in the interlayer space, and the gap formed between the connecting member and the floor. [Figure 11] The rear cross-sectional view and top view show a state in which a support bracket and metal plate for supporting a conventional fire-resistant interlayer material are installed in the interlayer formed between the outer wall, which is attached to the floor via a connecting member that is a lip channel steel, and the floor, and a state in which a fall prevention bracket for preventing the fire-resistant interlayer material from falling, according to the second embodiment, is installed in the space of the connecting member in the interlayer. [Figure 12] These are a rear cross-sectional view and a top view showing a state in which a fall prevention fitting for preventing the fire-resistant interlayer material in the second embodiment from falling is installed in the space of the connecting material between layers, and a state in which the fire-resistant interlayer material in the second embodiment is installed on top of the fall prevention fitting. [Figure 13] These are a rear cross-sectional view and a top view showing the state in which the third core material is rotated before the fire-resistant interlayer material is inserted into the space of the connecting material in the second embodiment, and the state in which the third core material has been rotated before the fire-resistant interlayer material is inserted into the space of the connecting material in the second embodiment. [Figure 14]These are a rear cross-sectional view and a top view showing the state before the fire-resistant interlayer material is inserted into the space of the connecting material in the second embodiment, and the state after a portion of the fire-resistant interlayer material has been inserted into the space of the connecting material in the second embodiment. [Figure 15] These are a rear cross-sectional view and a top view showing the state after the fire-resistant interlayer material in the second embodiment has been pressed into the space of the connecting material, and the state after the third core material 150 has been rotated with the fire-resistant interlayer material pressed into the space of the connecting material in the second embodiment. [Figure 16] These are front view, rear view, top view, bottom view, left side view, and right side view showing details of the fire-resistant interlayer material in the third embodiment. [Figure 17] These are rear cross-sectional and top views showing the interlayer space formed between the outer wall, which is attached to the floor via a connecting member made of lip channel steel, and the floor, and the space formed inside the connecting member 320 by the floor 200 which extends into the interior of the connecting member in the interlayer space. [Figure 18] These are front view, rear view, top view, bottom view, left side view, and right side view showing details of the fall prevention fitting for preventing the fire-resistant interlayer material from falling in the third embodiment. [Figure 19] The rear cross-sectional view and top view show a state in which a fall prevention fitting for preventing the fire-resistant interlayer material from falling in the third embodiment is installed in the space of the connecting material between layers, and a state in which the fire-resistant interlayer material in the third embodiment is pressed into the space formed inside the connecting material 320 by the floor 200 which has entered inside the connecting material 320, thereby closing the interlayer. [Figure 20] The images show a top view illustrating the interlayer formed between the outer wall and the floor, which is attached to the floor via a connecting member that is a lip channel steel, and the space formed inside the connecting member 320 by the floor 200 which extends into the interior of the connecting member in the interlayer, as well as a front view, rear view, top view, bottom view, left side view, and right side view illustrating the details of the fire-resistant interlayer material in the fourth embodiment. [Figure 21] This is a bottom view showing details of the fire-resistant interlayer material in the fifth embodiment. [Figure 22]The images show a rear cross-sectional view and a top view illustrating the interlayer space formed between the outer wall, which is attached to the floor via a connecting member made of channel steel, and the space of the connecting member within the interlayer space, as well as a rear cross-sectional view and a top view illustrating the state after the fire-resistant interlayer material has been pressed into and fixed into the space of the connecting member. [Figure 23] This is a top view showing a state in which conventional fire-resistant interlayer material is installed inside the connecting member in the interlayer formed between the outer wall and the floor, which is attached to the floor via a connecting member made of channel steel, and a state in which conventional fire-resistant interlayer material is installed inside the connecting member in the interlayer formed between the outer wall and the floor, which is attached to the floor via a connecting member made of lip channel steel. [Modes for carrying out the invention]

[0032] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. [First Embodiment] Figure 1 shows a front view, rear view, top view, bottom view, left side view, and right side view illustrating the details of the fire-resistant interlayer material in the first embodiment. As shown in Figure 1, the fire-resistant interlayer material 100 comprises a first core material 110, a second core material 120, and an upper surface covering material 130.

[0033] The first core material 110 is pressed into a space S formed inside a connecting member 320 that connects the structural frame, which is a framework such as a floor 200 and beams (not shown here), to the exterior wall 300, in order to close the space S in the interstory G, and comprises a first core material 111 and a first outer covering material 112 provided to completely cover the circumferential surface of the first core material 111.

[0034] The second core material 120 is for closing the interlayer G (not shown here) and comprises a second core material 121 and a second outer covering material 122 provided to completely cover the circumferential surface of the second core material 121.

[0035] The first core material 111 and the second core material 121 are formed from a material that has sufficient fire resistance by closing the interlayer G (not shown in this figure).

[0036] Specific materials include, for example, rock wool with a density of approximately 80 kg / cubic meter or more. In addition to rock wool, inorganic fibers such as ceramic fibers and glass wool can also be used to form the material.

[0037] Furthermore, the width dimension W of the first core material 111 and the second core material 121 is formed to be larger than the interlayer G. Specifically, if the width dimension W of the interlayer G (not shown here) is approximately 50 mm, the width dimension W of the first core material 111 and the second core material 121 should be formed to be approximately 55 mm to 65 mm.

[0038] Furthermore, when the first core material 111 is press-fitted into the connecting material 320, its width dimension W is oriented vertically, and it is press-fitted into the connecting material 320 through the opening. For this reason, the height dimension H of the first core material 111 is formed to a height that allows it to be press-fitted through the opening of the connecting material 320.

[0039] Furthermore, the height of the second core material 121 can be set to any height that prevents the spread of fire to the upper and lower floors, but it can also be set to the same height as the first core material 111.

[0040] Furthermore, the depth dimension D1 of the first core material 111 is sufficient to close off the space S formed inside the connecting material 320, and the depth dimension D2 of the second core material 121 can be formed to any desired dimension.

[0041] After the first core material 110 is pressed into the interior of the connecting material 320 through the opening of the connecting material 320, the fire-resistant interlayer material 100 is rotated around a rotation axis O oriented in the direction of connecting the first core material 110 and the second core material 120 until the top covering material 130 is horizontal on the top surface.

[0042] As a result, the width dimension W of the first core material 110, which was oriented vertically, is turned horizontally to close the space S formed inside the connecting material 320, and the width dimension W of the second core material 120 is turned horizontally to close the interlayer G.

[0043] The first outer covering material 112 and the second outer covering material 122 are made of, for example, a polyethylene film that does not allow water to pass through, and the first core material 111 and the second core material 121 are completely covered by the first outer covering material 112 and the second outer covering material 122, so that the first core material 111 and the second core material 121 are protected from moisture such as rainwater.

[0044] The back side of the first core material 110 and the front side of the second core material 120 are installed adjacent to each other, and the top surface covering material 130 is adhered and fixed to the top surfaces of the first core material 110 and the second core material 120, which are installed adjacent to each other, by an adhesive surface provided on the lower side of the top surface covering material 130 so as to completely cover the top surfaces of the first core material 110 and the second core material 120. The material of the top covering material 130 is a top sheet material in which a sheet-like material, such as an aluminum glass cloth sheet made of a fire-resistant material that combines waterproofing and resistance to welding sparks, is provided on the top surface.

[0045] A sheet-like upper surface covering material 130 is bonded and fixed to the upper surfaces of the first core material 110 and the second core material 120, thereby forming a first connecting portion in which the upper surfaces of the first core material 110 and the second core material 120 are connected.

[0046] In this embodiment, the first connecting portion was described as a sheet-like upper surface covering material 130 in which the upper surfaces of the first core material 110 and the second core material 120 are connected. However, the first connecting portion only needs to be able to connect the first core material 110 and the second core material 120, and the first connecting portion can also be formed in the center or bottom of the first core material 110 and the second core material 120 in such a way that the lip portion 324 can be accommodated.

[0047] The top covering material 130 is provided so as to protrude outward on both sides beyond the width dimension W of the first core material 110 and the second core material 120, and is equipped with extensions 131 for fixing the first core material 110 and the second core material 120 in predetermined locations.

[0048] An adhesive surface is provided on the lower side of the upper covering material 130, but a release paper 132 is attached to the adhesive surface exposed on the lower side of the extension portion 131 so as to completely cover the exposed adhesive surface, and the attached release paper 132 protects the adhesive surface. When the extension portion 131 is adhered and fixed in place, the release paper 132 is peeled off from the adhesive surface and adhered.

[0049] When the first core material 110 and the second core material 120 are installed in the inter-story G or space S, one extension 131 is attached to the inner surface of the connecting material 320 or the side or top surface of the floor 200 via an adhesive surface, and the other extension 131 is attached to the inner surface of the connecting material 320 or the side surface of the outer wall 300 via an adhesive surface, thereby preventing moisture such as rainwater from penetrating into the interior of the first core material 110 and the second core material 120.

[0050] Furthermore, since the entire upper surface of the first core material 110 and the second core material 120 is completely covered by the upper surface covering material 130, it is possible to prevent, for example, welding work being performed on an upper floor from welding sparks falling from the upper floor directly hitting and damaging the first core material 110 and the second core material 120.

[0051] This prevents corrosion of the fire-resistant interlayer material 100, which can occur when welding sparks hit the first core material 110 and the second core material 120, damaging the first outer covering material 112 and the second outer covering material 122, and allowing moisture such as rainwater to penetrate into the first core material 110 and the second core material 120 from the damaged first outer covering material 112 and the second outer covering material 122.

[0052] Furthermore, since the top covering material 130, which is adhesively fixed to the upper surfaces of the first core material 110 and the second core material 120, is adhesively fixed to the inner surface of the connecting material 320 and to the floor 200 and outer wall 300 of the building via adhesive surfaces, it is possible to prevent the first core material 110 and the second core material 120, which are adhesively fixed to the top covering material 130, from falling down to the lower floors from the inside of the connecting material 320 or from the inter-story space G.

[0053] Furthermore, notches 133 are provided on both sides of the extended portion of the first connecting section where the upper surfaces of the first core material 110 and the second core material 120 of the upper surface covering material 130 are connected. The notches 133 are installed so that the lip portion 324 is accommodated when the fire-resistant interlayer material 100 is installed in the interlayer G.

[0054] As described above, the fire-resistant interlayer material 100 has a first core material 110 that is press-fitted into the interior through the opening of the connecting material 320 and a second core material 120 that is press-fitted into the interlayer G, and these are connected by a first connecting portion made of the upper covering material 130. Therefore, the space S formed inside the connecting material 320 and the interlayer G can be easily and reliably closed.

[0055] Figure 2 shows a rear cross-sectional view and a top view illustrating the inter-story space formed between the outer wall, which is attached to the floor via a connecting member made of lip-channel steel, and the floor, as well as the space of the connecting member within the inter-story space. As shown in Figure 2, an interlayer G is formed between the floor 200 and the exterior wall 300. The exterior wall 300, which consists of multiple exterior wall materials 310, is attached to one flange portion 322 that rises from the web portion 321 of the connecting member 320, which is a lip channel steel, and the other flange portion 323 is attached to the floor 200.

[0056] Furthermore, lip portions 324 are formed on the opening side of flange portions 322 and 323, which are raised from the web portion 321, so as to close the openings.

[0057] Inside the connecting member 320, a space S is formed, surrounded by the web portion 321, the flange portion 322, the flange portion 323, and the lip portion 324. In the fire-resistant interlayer material 100 of this embodiment, the space S in the interlayer G and the interlayer G can be easily and reliably closed.

[0058] Figure 3 shows a front view, rear view, top view, bottom view, left side view, and right side view detailing the fall prevention fitting for preventing the fire-resistant interlayer material from falling in the first embodiment. As shown in Figure 3, the fall prevention fitting 140 includes a first flat plate portion 141, a second flat plate portion 142, and a notch portion 143.

[0059] The fall prevention fitting 140 is made, for example, by punching out a flat steel plate with a thickness of 1.6 mm. It prevents the fire-resistant interlayer material 100, which is installed inside the connecting member 320, from falling, and also prevents the spread of fire to the upper and lower floors by closing off the space S formed inside the connecting member 320.

[0060] The first flat plate portion 141 is inserted into a space S formed inside the connecting member 320 that connects the structural frame, which is a framework including floors 200 and beams (not shown here), to the exterior wall 300, and is intended to close off the space S in the inter-story G. It is punched out in a shape that is almost the same as the space S formed inside the connecting member 320. The second flat plate portion 142 is for closing the interlayer G (not shown here), and is formed as a rectangle with a width sufficient to close the interlayer G.

[0061] The flat plate connecting portion, which is a connecting portion that connects the first flat plate portion 141 and the second flat plate portion 142 on a plane integral with each other, has notches 143 formed on both sides that are large enough to accommodate the two lip portions 324 of the connecting member 320, which is a lip channel steel, when the fall prevention fitting 140 is installed in the space S and the interlayer G.

[0062] When the fall prevention fitting 140 is installed in the space S and the inter-story G, the planar direction of the fall prevention fitting 140 is oriented vertically, and the first flat plate portion 141 is inserted into the interior of the connecting member 320 through the opening of the connecting member 320.

[0063] After the first flat plate portion 141 is inserted into the interior of the connecting member 320 through the opening of the connecting member 320, the fall prevention fitting 140 is rotated around a rotation axis P oriented in the direction connecting the first flat plate portion 141 and the second flat plate portion 142 until the fall prevention fitting 140 is horizontal.

[0064] As a result, the first flat plate portion 141, which was oriented vertically, is turned horizontally to close the space S formed inside the connecting member 320, the second flat plate portion 142 is turned horizontally to close the interlayer G, and the lip portion 324 is accommodated in the notch portion 143.

[0065] Figure 4 shows a rear cross-sectional view and a top view, illustrating a state in which support fittings and metal plates for supporting conventional fire-resistant interlayer materials are installed in the interlayer formed between the outer wall, which is attached to the floor via a connecting member that is a lip channel steel, and the floor, and a state in which fall prevention fittings for preventing the fire-resistant interlayer materials from falling in the first embodiment are installed in the space of the connecting member in the interlayer.

[0066] Figure 4(A) shows the state before the fall prevention fitting 140 is installed, and specifically shows the state with the support fitting 400 and metal plate material 500, which are prior art and are disclosed in, for example, Patent Document 2, installed. As shown in Figure 4(A), a support bracket 400 and a metal plate 500 for supporting a fire-resistant interlayer material 10, which is a prior art example disclosed in Patent Document 2, are installed in the interlayer G.

[0067] The support fitting 400 is made of a flat material such as a metal plate that has been bent, and is bent at a right angle to cover the upper surface and edge of the floor 200. It comprises an upper support portion 410 that faces the upper surface of the floor 200 and supports the support fitting 400, an attachment portion 420 that extends vertically downward from the upper support portion 410 along the side of the floor 200 and faces the side of the floor 200 down to the bottom of the floor 200, a corner portion that is bent at an acute angle from the lower end of the attachment portion 420 toward the upper part of the outer wall 300 and supports one longitudinal side of the metal plate 500, and a support portion 440 that extends from the plate support portion 430 toward the upper part of the outer wall 300 until it reaches the outer wall 300, and the cross-section of the fitting is in the shape of a "L".

[0068] The distance from the splice 420 to the tip of the support part 440 of the support bracket 400 is set to be larger than the inter-story space G. As a result, when the support bracket 400 is pressed in from the top of the inter-story space G, the splice 420 is pressed against the side of the floor 200, improving the stability of the support bracket 400 within the inter-story space G.

[0069] Furthermore, the support bracket 400 is pressed into the inter-story G until the upper support portion 410 faces the upper surface of the floor 200. With the upper support portion 410 facing the upper surface of the floor 200 and the auxiliary portion 420 facing the side surface of the floor 200, the support bracket 400 is firmly fixed within the inter-story G. Multiple support brackets 400 are installed at predetermined intervals along the longitudinal direction of the inter-story G.

[0070] The metal plate 500 is supported on one side in the longitudinal direction by plate support parts 430 provided by support brackets 400, which are installed at predetermined intervals along the longitudinal direction of the interlayer G, and on the other side by the outer wall 300. The metal plate 500 is a plate material with a thickness of 1.6 mm or more that closes the interlayer G along the longitudinal direction.

[0071] By installing this metal plate 500 in the inter-story space G, the inter-story space G is closed off and supported by the support fittings 400, thus preventing the spread of fire between upper and lower floors. Furthermore, since the conventional fire-resistant inter-story material 10 is installed above the inter-story space G which is closed off by the metal plate 500, the falling of the conventional fire-resistant inter-story material 10 can be firmly prevented.

[0072] In this explanation, the metal plate 500 is installed with a gap between it and the opening side of the connecting member 320. However, it is also possible to install the metal plate 500 so that it is in contact with the opening side of the connecting member 320.

[0073] Although omitted here, the metal plate 500 can also be supported on the closed end side of the connecting member 320 in a similar manner by multiple support fittings 400. In this case, by installing the metal plate 500 so that it is in contact with the closed end side of the connecting member 320, the metal plate 500 can be installed with the interlayer G closed.

[0074] Furthermore, although the explanation here uses the example of a state in which the support fitting 400 and metal plate material 500 disclosed in Patent Document 2 as prior art are installed, the metal plate material 500 is not limited to the plate material support portion 430 which is a corner portion of the support fitting 400.

[0075] For example, the support bracket 400 is made of a flat material such as a metal plate that has been bent, and is bent at a right angle so as to cover the upper surface and edges of the floor 200, and comprises an upper support portion 410 that supports the support bracket 400 by facing the upper surface of the floor 200, an attachment portion 420 that extends vertically downward from the upper support portion 410 along the side of the floor 200 and faces the side of the floor 200 down to the bottom of the floor 200, and a support portion 440 that is bent and extended from the end of the attachment portion 420 toward the upper part of the outer wall 300, and a plate support portion 430 for supporting a metal plate material 500 can also be provided on the attachment portion 420.

[0076] The plate support portion 430 is, for example, a projection shaped by cutting and raising a part of the attachment portion 420. The floor 200 side of the metal plate 500 is supported by this plate support portion 430, and the outer wall 300 side of the metal plate 500 is supported by the outer wall 300. Alternatively, the plate support portion 430 may be a projection attached to the surface of the attachment portion 420 on the outer wall 300 side by welding or the like.

[0077] In addition, the plate support portion 430 can also be provided on the support portion 440. For example, the plate support portion 430 is a projection shaped by cutting and raising a part of the tip of the support portion 440, and the outer wall 300 side of the metal plate 500 is supported by the plate support portion 430 formed at the tip of the support portion 440, and the floor 200 side portion of the metal plate 500 is supported by a part of the attachment portion 420 that is above the tip of the support portion 440.

[0078] Figure 4(B) shows the state in which the fall prevention fitting 140 is installed, the first flat plate portion 141 is inserted into the interior of the connecting member 320 through the opening of the connecting member 320, and the fall prevention fitting 140 is rotated around the rotation axis P.

[0079] As shown in Figure 4(B), the fall prevention fitting 140 is inserted into the space S through the opening of the connecting member 320 while the first flat plate portion 141 is rotated so that the first flat plate portion 141 is oriented toward the connecting member 320 and the planar direction of the fall prevention fitting 140 is vertical.

[0080] After the first flat plate portion 141 is inserted into the interior of the connecting member 320 through the opening of the connecting member 320, the fall prevention fitting 140 is rotated around a rotation axis P oriented in the direction connecting the first flat plate portion 141 and the second flat plate portion 142 until the fall prevention fitting 140 is horizontal.

[0081] At this time, since a support bracket 400 and a metal plate 500 are installed at the lower part of the fall prevention fitting 140, the fall prevention fitting 140 installed in the space S and the inter-story G is installed on top of the metal plate 500 and fixed in a predetermined position.

[0082] Figure 5 shows a rear cross-sectional view and a top view, respectively, of a state in which a fall prevention fitting for preventing the fire-resistant interlayer material in the first embodiment from falling is installed in the space of the connecting material between layers, and of a state in which the fire-resistant interlayer material in the first embodiment is installed on top of the fall prevention fitting.

[0083] Figure 5(A) shows a state in which a fall prevention fitting 140, which prevents the fire-resistant interlayer material 100 from falling in the first embodiment, is installed in the space S of the connecting material 320 in the interlayer G. As shown in Figure 5(A), a support bracket 400 and a metal plate 500 are installed at the bottom of the fall prevention fitting 140. Therefore, the fall prevention fitting 140 installed in the space S and the inter-story G is installed on top of the metal plate 500 and fixed in a predetermined position.

[0084] As a result, the first flat plate portion 141 closes the space S formed inside the connecting member 320, and the second flat plate portion 142 closes the interlayer G on the outside of the opening side of the connecting member 320. Therefore, even if the metal plate 500 is installed so that there is a gap between it and the opening side of the connecting member 320, the gap can be closed with the fall prevention fitting 140.

[0085] Figure 5(B) shows the state in which the fire-resistant interlayer material 100 in the first embodiment is installed on the upper part of the fall prevention fitting 140. As shown in Figure 5(B), the fire-resistant interlayer material 100 is rotated so that the upper covering material 130 is oriented toward the outer wall 300 and the first core material 110 is oriented toward the connecting material 320. At this time, it is preferable to fold the extension portion 131 and release paper 132 of the upper covering material 130 inward.

[0086] Figure 6 shows a rear cross-sectional view and a top view of the first embodiment, showing the state before the fire-resistant interlayer material is inserted into the space of the connecting material, and the state after a portion of the fire-resistant interlayer material has been inserted into the space of the connecting material.

[0087] Figure 6(A) shows the state before the fire-resistant interlayer material 100 is inserted into the space S of the connecting material 320 in the first embodiment. As shown in Figure 6(A), from the state in Figure 5(B), the first core material 110, with its front side facing the connecting material 320, is compressed so that the width between the bottom surface of the first core material 110 and the top covering material 130 becomes smaller than the width of the opening in the connecting material 320, by oriented the bottom surface of the first core material 110 towards the top covering material 130, in order to press-fit it into the interior of the connecting material 320.

[0088] Figure 6(B) shows the state in which the first core material 110, which is part of the fire-resistant interlayer material 100 in the first embodiment, is inserted into the space S of the connecting material 320. After the first core material 110 is pressed into the interior of the connecting material 320 through the opening of the connecting material 320, the upper covering material 130 is provided with a notch 133 to accommodate the lip portion 324 between the first core material 110 and the second core material 120, and the fire-resistant interlayer material 100 is rotated counterclockwise around a rotation axis O oriented in the direction connecting the first core material 110 and the second core material 120 until the upper covering material 130 is horizontal on the upper surface.

[0089] Figure 7 shows a rear cross-sectional view and a top view of the state after the fire-resistant interlaminar material has been pressed into the space of the connecting material in the first embodiment, and the state after the fire-resistant interlaminar material has been pressed into the space of the connecting material and the interlaminar space has been closed in the first embodiment.

[0090] Figure 7(A) shows the state after the fire-resistant interlayer material 100 has been press-fitted into the space S of the connecting material 320 in the first embodiment. As shown in Figure 7(A), from the state in Figure 6(B), the fire-resistant interlayer material 100 is rotated counterclockwise around the rotation axis O until the top covering material 130 is horizontal on the top surface, so that the fire-resistant interlayer material 100 is in a horizontal position with the top covering material 130 facing upwards. At this time, because the top covering material 130 has a notch 133, two lip portions 324 are housed between the first core material 110 and the second core material 120.

[0091] Figure 7(B) shows the state in the first embodiment where the fire-resistant interlayer material 100 is press-fitted into the space S of the connecting material 320, thereby closing the interlayer G. As shown in Figure 7(B), the fire-resistant interlayer material 100 is moved downward from the state in Figure 7(A) until the upper surface covering material 130 of the fire-resistant interlayer material 100 is at the same position as the upper surface of the floor 200. This allows the fire-resistant interlayer material 100 to close off the space S in the interlayer G and the interlayer G.

[0092] Figure 8 shows a rear cross-sectional view and a top view of the state after the fire-resistant interlaminar material in the first embodiment has been pressed into and fixed in the space of the connecting material, and the state in which the space of the connecting material and the interlaminar space are closed by the fire-resistant interlaminar material in the first embodiment and the conventional fire-resistant interlaminar material.

[0093] Figure 8(A) shows the state after the fire-resistant interlayer material 100 has been press-fitted into the space S of the connecting material 320 and fixed in place, according to the first embodiment. As shown in Figure 8(A), the release paper 132 protecting the adhesive surface from the extension 131 is peeled off in the state shown in Figure 7(B), and the exposed adhesive surface of the extension 131 is attached to the floor 200 or exterior wall material 310, thereby fixing the fire-resistant interlayer material 100 in the predetermined position.

[0094] Specifically, of the extensions 131 provided on the upper covering material 130, the extensions 131 that are divided by the notches 133 and extend to both sides from the upper surface of the first core material 110 are attached to the inner surfaces of the flange portions 322 and 323, which are inside the connecting material 320, via an adhesive surface.

[0095] Furthermore, of the extensions 131 provided on the upper covering material 130, the extensions 131 that are divided by the notches 133 and extend from the upper surface of the second core material 120 toward the floor 200 are attached to the floor 200 via an adhesive surface from the top of the pre-installed support bracket 400.

[0096] Furthermore, of the extensions 131 provided on the upper covering material 130, the extensions 131 that are divided by the notches 133 and extend from the upper surface of the second core material 120 toward the outer wall 300 are attached to the wall surface of the outer wall 300 via an adhesive surface.

[0097] As described above, in the first embodiment, the fire-resistant interlayer material 100 is fixed in a predetermined position by the adhesive surface provided on the lower surface of the upper covering material 130 being attached to the inside of the connecting material 320, the floor 200, and the outer wall 300.

[0098] Figure 8(B) shows the state in which the space S of the connecting member 320 and the interlayer G are closed by the fire-resistant interlayer material 100 in the first embodiment and the conventional fire-resistant interlayer material 10. As described above, in the first embodiment, the fire-resistant interlayer material 100 closes the space S in the interlayer G and the interlayer G outside the opening of the connecting material 320.

[0099] Multiple support fittings 400 are installed in advance in the interlayer G formed on the closed side of the connecting member 320 and in the interlayer G formed on the open side of the connecting member 320. The conventional fire-resistant interlayer material 10 is pressed into the interlayer G from the top of the installed support fittings 400, and the conventional fire-resistant interlayer material 10 is supported by the pre-installed support fittings 400.

[0100] Furthermore, the extensions of the upper surface covering material 13, which is provided on the upper surface of the conventional fire-resistant interlayer material 10, are attached to the floor 200 and the outer wall 300 via adhesive surfaces provided on the lower surfaces of the extensions. This closes and fixes the interlayer G formed on the closed side of the connecting material 320.

[0101] As described above, the fire-resistant interlayer material 100 in the first embodiment and the conventional fire-resistant interlayer material 10 can easily and reliably close the interlayer G formed between the floor 200 and the exterior wall 300 of the building, and the space S formed inside the connecting material 320 that connects the exterior wall 300 and the structural frame in the interlayer G.

[0102] In this embodiment of the fire-resistant interlaminar material 100, in order to facilitate insertion of the first core material 110 from the opening of the connecting material 320, the first core material 110 is pressed into the interior of the connecting material 320 with the width dimension W, which is the inner diameter width of the channel steel when the space S in which the fire-resistant interlaminar material 100 is installed is closed, oriented vertically, and then the fire-resistant interlaminar material 100 is rotated until it is horizontal. However, if the first core material 110 can be compressed horizontally while the fire-resistant interlaminar material 100 is oriented horizontally and inserted into the interior of the connecting material 320 from the opening, that method can also be used.

[0103] [Second Embodiment] Next, a second embodiment of the present invention will be described. The fire-resistant interlayer material of this embodiment is substantially the same as that shown in the first embodiment, except for differences in the shape and quantity of the core material. For this reason, components that are substantially the same as those in the first embodiment will be denoted by the same reference numerals, and their descriptions will be omitted as appropriate.

[0104] Figure 9 shows a front view, rear view, top view, bottom view, left side view, and right side view illustrating the details of the fire-resistant interlayer material in the second embodiment. In this embodiment, the following explanation will be given using a fire-resistant inter-story material 100 as an example, which closes the gap T formed between the floor 200 and the connecting material 320 in the inter-story G, the space S formed inside the connecting material 320, and the inter-story G, by connecting the connecting material 320 to a structural frame such as a beam.

[0105] As shown in Figure 9, the fire-resistant interlayer material 100 comprises a first core material 110, a second core material 120, a third core material 150, and an upper surface covering material 130. The first core material 110 is pressed into a space S formed inside a connecting member 320 that connects the structural frame, which is a framework such as a floor 200 and beams (not shown here), to the exterior wall 300, in order to close the space S in the interstory G, and comprises a first core material 111 and a first outer covering material 112 provided to completely cover the circumferential surface of the first core material 111.

[0106] The second core material 120 is for closing the interlayer G formed between the floor 200 (not shown here) and the outer wall 300, and comprises a second core material 121 and a second outer covering material 122 provided to completely cover the circumferential surface of the second core material 121.

[0107] The third core material 150 is for closing the gap T formed between the connecting material 320 (not shown here) and the floor 200, and comprises a third core material 151 and a third outer covering material 152 provided to completely cover the circumferential surface of the third core material 151. The first core material 111, the second core material 121, and the third core material 151 are formed from materials that have sufficient fire resistance by closing the interlayer G (not shown here).

[0108] The side of the third core material 150 is installed adjacent to one side of the first core material 110, and the back sides of the adjacent first core material 110 and third core material 150 are installed adjacent to the front side of the second core material 120. An upper surface covering material 130, which completely covers the upper surfaces of the adjacent first core material 110, second core material 120, and third core material 150, is adhered and fixed to the upper surfaces of the first core material 110, second core material 120, and third core material 150 by an adhesive surface provided on the lower side of the upper surface covering material 130.

[0109] In the first connecting portion of the upper surface of the first core material 110 and the second core material 120 of the upper surface covering material 130, a notch 133 is provided in the extension portion opposite to the side that contacts the first core material 110 and the third core material 150. The notch 133 is installed so that the lip portion 324 is inserted when the fire-resistant interlayer material 100 is installed in the interlayer G.

[0110] Furthermore, the upper surface covering material 130 provided on the upper surfaces of the first core material 110 and the third core material 150, which are installed adjacent to each other, is provided with a notch 134 that breaks the connection between the first core material 110 and the third core material 150.

[0111] Furthermore, of the first core material 110 and the second core material 120, which are installed adjacent to each other, and the upper surface covering material 130 provided on the upper surface, a notch 135 is provided on the side opposite to the side that contacts the first core material 110 and the third core material 150, so as to partially sever the connection between the first core material 110 and the second core material 120, and an L-shaped notch is formed by the notch 134 and the notch 135.

[0112] Therefore, although the third core material 150 is not connected to the first core material 110, a second connecting portion is formed where the upper surfaces of the first core material 110 and the third core material 150 are connected by adhesive fixing of the sheet-like upper surface covering material 130 to the upper surfaces of the third core material 150 and the second core material 120. Furthermore, since the third core material 150 is connected only to the second core material 120 via the second connecting portion, the third core material 150 can be rotated in a hinge-like manner using the second connecting portion as a support axis.

[0113] The notched portion 134 is installed such that the flange portion 323 is inserted when the fire-resistant interlaminar material 100 is installed in the interlaminar G, and the notched portion 135 is installed such that the lip portion 324 is inserted when the fire-resistant interlaminar material 100 is installed in the interlaminar G.

[0114] As described above, the fire-resistant interlayer material 100 has a first core material 110 that is press-fitted into the interior from the opening of the connecting material 320 and a second core material 120 that is press-fitted into the interlayer G, which are connected by a first connecting portion made of the upper covering material 130. The third core material 150 that is press-fitted into the gap T formed between the connecting material 320 and the floor 200 and the second core material 120 are connected by a second connecting portion made of the upper covering material 130. As a result, the space S formed inside the connecting material 320, the interlayer G and the gap T can be easily and reliably closed.

[0115] Figure 10 is a rear cross-sectional view and a top view showing the interlayer formed between the outer wall, which is attached to the floor via a connecting member that is a lip channel steel, and the floor, the space of the connecting member in the interlayer, and the gap formed between the connecting member and the floor.

[0116] As shown in Figure 10, an interlayer G is formed between the floor 200 and the exterior wall 300. The exterior wall 300, which consists of multiple exterior wall materials 310, is attached to one flange portion 322 that rises from the web portion 321 of the connecting member 320, which is a lip channel steel, and the other flange portion 323 is attached to a structural frame, such as a beam (not shown here), that protrudes from the end face of the floor 200 toward the exterior wall.

[0117] Therefore, a space S is formed inside the connecting member 320, surrounded by the web portion 321, flange portion 322, flange portion 323, and lip portion 324, and a gap T is formed between the flange portion 323 and the floor 200. In the fire-resistant interlayer material 100 of this embodiment, the space S in the interlayer G and the gap T between the interlayer G can be easily and reliably closed.

[0118] Figure 11 shows a rear cross-sectional view and a top view illustrating a state in which support fittings and metal plates for supporting conventional fire-resistant interlayer materials are installed in the interlayer formed between the outer wall, which is attached to the floor via a connecting member that is a lip channel steel, and the floor, and a state in which fall prevention fittings for preventing the fire-resistant interlayer materials from falling in the second embodiment are installed in the space of the connecting member in the interlayer.

[0119] Figure 11(A) shows the state before the fall prevention fitting 140 is installed, and specifically shows the state with the support fitting 400 and metal plate material 500, which are prior art disclosed in, for example, Patent Document 2, installed.

[0120] Figure 11(B) shows the state in which the fall prevention fitting 140 is installed, the first flat plate portion 141 is inserted into the interior of the connecting member 320 through the opening of the connecting member 320, and the fall prevention fitting 140 is rotated around the rotation axis P.

[0121] Furthermore, a metal plate 510 is installed in the gap T formed between the connecting member 320 and the floor 200 as a connecting member-to-floor closure metal plate, which is formed with a width dimension that can close the gap T. The metal plate 510 is installed so as to straddle two support fittings 400 installed on the opening and closing sides of the connecting member 320, or a metal plate 500 supported by the support fittings 400, and the metal plate 510 is supported by the two support fittings 400 or the two metal plate 500.

[0122] Figure 12 is a rear cross-sectional view and a top view showing a state in which a fall prevention fitting for preventing the fire-resistant interlayer material in the second embodiment from falling is installed in the space of the connecting material between layers, and a state in which the fire-resistant interlayer material in the second embodiment is installed on top of the fall prevention fitting.

[0123] Figure 12(A) shows a state in which a fall prevention fitting 140, which prevents the fire-resistant interlayer material 100 from falling in the second embodiment, is installed in the space S of the connecting material 320 in the interlayer G. As shown in Figure 12(A), since the support bracket 400 and the metal plate 500 are installed below the fall prevention fitting 140 and the metal plate 510, the fall prevention fitting 140 installed in the space S and the inter-story G and the metal plate 510 installed in the gap T are installed on top of the support bracket 400 or the metal plate 500 and fixed in place.

[0124] As a result, the first flat plate portion 141 closes the space S formed inside the connecting member 320, the second flat plate portion 142 closes the interlayer G on the outside of the opening side of the connecting member 320, and the metal plate 510 closes the gap T.

[0125] Figure 12(B) shows the state in which the fire-resistant interlayer material 100 in the second embodiment is installed on the upper part of the fall prevention fitting 140. As shown in Figure 12(B), the fire-resistant interlayer material 100 is rotated so that the top covering material 130 is oriented toward the floor 200, the first core material 110 is oriented toward the connecting material 320, and the third core material 150 is on the bottom. At this time, it is preferable to fold the upper extension portion 131 and the release paper 132 of the top covering material 130 inward.

[0126] Figure 13 shows a rear cross-sectional view and a top view of the state in the second embodiment where the third core material is rotated before the fire-resistant interlayer material is inserted into the space of the connecting material, and the state in the second embodiment where the third core material has been rotated before the fire-resistant interlayer material is inserted into the space of the connecting material.

[0127] Figure 13(A) shows the state in which the third core material 150 is rotated before the fire-resistant interlayer material 100 is inserted into the space S of the connecting material 320 in the second embodiment. As shown in Figure 13(A), when the first core material 110 is pressed into the interior of the connecting material 320 and rotated from the state shown in Figure 12(B), the third core material 150, with its front side facing the connecting material 320, is rotated horizontally and toward the floor 200 so that the third core material 150 does not interfere with the lip portion 324 of the connecting material 320.

[0128] Specifically, the connection between the adjacent first core material 110 and third core material 150 is severed by the cut portion 134, which is connected by the upper surface covering material 130 provided on the upper surface. However, the adjacent second core material 120 and third core material 150 are connected via a second connection portion provided by the upper surface covering material 130. The third core material 150 is rotated horizontally and toward the floor 200 via this second connecting section. The second connecting section is also folded into a V-shape toward the connecting material 320.

[0129] Figure 13(B) shows the state in which the third core material 150 is rotated before the fire-resistant interlayer material 100 is inserted into the space S of the connecting material 320 in the second embodiment. As shown in Figure 13(B), from the state in Figure 13(A), the second connecting portion is folded in a mountain shape toward the connecting member 320, and the third core material 150 is rotated until the extension portion 131 of the folded upper covering material 130 makes contact.

[0130] As a result, when the first core material 110 is pressed into the interior of the connecting material 320 and rotated, the third core material 150 does not interfere with the lip portion 324 of the connecting material 320, and the third core material 150, which closes the gap T formed between the floor 200 and the connecting material 320, can be moved to the outside of the connecting material 320.

[0131] Figure 14 shows a rear cross-sectional view and a top view of the second embodiment, showing the state before the fire-resistant interlayer material is inserted into the space of the connecting material, and the state after a portion of the fire-resistant interlayer material has been inserted into the space of the connecting material.

[0132] Figure 14(A) shows the state before the fire-resistant interlayer material 100 is inserted into the space S of the connecting material 320 in the second embodiment. As shown in Figure 14(A), from the state in Figure 13(B), the first core material 110, with its front side facing the connecting material 320, is compressed so that the width between the bottom surface of the first core material 110 and the top covering material 130 becomes smaller than the width of the opening in the connecting material 320, by oriented the bottom surface of the first core material 110 towards the top covering material 130, in order to press-fit it into the interior of the connecting material 320.

[0133] At this time, the third core material 150 is rotated horizontally and toward the floor 200 via the second connecting part, so it does not enter the interior of the connecting material 320. Also, when the first core material 110 is pressed into the interior of the connecting material 320, the third core material 150 and the connecting material 320 do not interfere with each other.

[0134] Figure 14(B) shows the state in which the first core material 110, which is part of the fire-resistant interlayer material 100 in the second embodiment, is inserted into the space S of the connecting material 320. After the first core material 110 is pressed into the interior of the connecting material 320 through the opening of the connecting material 320, the upper covering material 130 has a notch 133 which accommodates the lip portion 324 between the first core material 110 and the second core material 120. The fire-resistant interlayer material 100 is then rotated clockwise around a rotation axis O oriented in the direction connecting the first core material 110 and the second core material 120 until the upper covering material 130 is horizontal on the upper surface.

[0135] Figure 15 shows a rear cross-sectional view and a top view of the state after the fire-resistant interlayer material has been pressed into the space of the connecting material in the second embodiment, and the state after the third core material 150 has been rotated with the fire-resistant interlayer material pressed into the space of the connecting material in the second embodiment.

[0136] Figure 15(A) shows the state after the fire-resistant interlayer material 100 has been press-fitted into the space S of the connecting material 320 in the second embodiment. As shown in Figure 15(A), by rotating the fire-resistant interlayer material 100 clockwise around the rotation axis O until the top covering material 130 is horizontal on the top surface, the fire-resistant interlayer material 100 takes on a horizontal position with the top covering material 130 facing upwards. At this time, the notches 133 provided in the top covering material 130 house the two lip portions 324 between the first core material 110 and the second core material 120.

[0137] Figure 15(B) shows the state in which the third core material 150 is rotated while the fire-resistant interlayer material 100 is press-fitted into the space S of the connecting material 320 in the second embodiment. As shown in Figure 15(B), from the state in Figure 15(A), the third core material 150, which is connected via the second connecting part, is rotated in a hinge-like manner using the second connecting part as a support axis until the upper surface covering material 130 provided on the upper surface of the third core material 150 becomes horizontal on the upper surface.

[0138] As a result, the third core material 150 is installed above the gap T formed between the floor 200 and the connecting material 320. In this state, the fire-resistant interlayer material 100 is moved downward until the upper surface covering material 130 of the fire-resistant interlayer material 100 is at the same position as the upper surface of the floor 200. This allows the first core material 110 to close the space S in the interlayer G, the second core material 120 to close the interlayer G, and the third core material 150 to close the gap T.

[0139] [Third Embodiment] Next, a third embodiment of the present invention will be described. The fire-resistant interlayer material of this embodiment is substantially the same as that shown in the first embodiment, except for the difference in the position and number of cuts. For this reason, components that are substantially the same as those in the first embodiment will be denoted by the same reference numerals, and their descriptions will be omitted as appropriate.

[0140] Figure 16 shows a front view, rear view, top view, bottom view, left side view, and right side view illustrating the details of the fire-resistant interlayer material in the third embodiment. In this embodiment, a portion of the connecting member 320 is embedded in the floor 200, and the fire-resistant interlayer material 100 that closes the space S formed inside the connecting member 320 by the floor 200 that extends inside the connecting member 320 will be described below as an example.

[0141] As shown in Figure 16, the fire-resistant interlayer material 100 comprises a first core material 110, a second core material 120, and an upper surface covering material 130. The first core material 110 is pressed into the space S formed inside the connecting material 320 by the floor 200 which is inserted into the connecting material 320 that connects the structural frame, which is a framework such as a floor 200 and beams (not shown here), to the exterior wall 300, and is intended to close the space S in the interlayer G. It comprises a first core material 111 and a first outer covering material 112 which is provided to completely cover the circumferential surface of the first core material 111.

[0142] The second core material 120 is for closing the interlayer G (not shown here) and comprises a second core material 121 and a second outer covering material 122 provided to completely cover the circumferential surface of the second core material 121.

[0143] A notch 133 is provided on one side of the extension of the first connecting portion where the upper surfaces of the first core material 110 and the second core material 120 of the upper surface covering material 130 are connected. The notch 133 is installed so that when the fire-resistant interlayer material 100 is installed in the interlayer G, the lip portion 324 on one side is inserted.

[0144] In this embodiment, the notch 133 is described as being provided on the front right side, but the notch 133 can be provided at any location depending on the orientation of the opening of the connecting member 320 in which the fire-resistant interlayer material 100 is installed and the position of the protruding lip portion 324.

[0145] As described above, the fire-resistant interlayer material 100 has a first core material 110 that is press-fitted into the interior through the opening of the connecting material 320 and a second core material 120 that is press-fitted into the interlayer G, and these are connected by a first connecting portion made of the upper covering material 130. Therefore, the space S formed inside the connecting material 320 and the interlayer G can be easily and reliably closed.

[0146] Figure 17 is a rear cross-sectional view and a top view showing the interlayer space formed between the outer wall, which is attached to the floor via a connecting member that is a lip channel steel, and the floor, and the space formed inside the connecting member 320 by the floor 200 which extends into the interior of the connecting member in the interlayer space.

[0147] As shown in Figure 17, an interlayer G is formed between the floor 200 and the exterior wall 300. The exterior wall 300, which consists of multiple exterior wall materials 310, is attached to one flange portion 322 that rises from the web portion 321 of the connecting member 320, which is a lip channel steel. The other flange portion 323 and the lip portion 324 on the floor 200 side, which is formed by closing the opening on the opening side from the flange portion 323, are completely embedded inside the floor 200. Furthermore, a lip portion 324 is formed on the opening side of the flange portion 322 that rises from the web portion 321, so as to close the opening.

[0148] Inside the connecting member 320, a space S is formed, surrounded by the web portion 321, the flange portion 322, the lip portion 324, and the floor 200. In the fire-resistant interlayer material 100 of this embodiment, the space S in the interlayer G and the interlayer G can be easily and reliably closed.

[0149] Figure 18 shows a front view, rear view, top view, bottom view, left side view, and right side view detailing the fall prevention fitting for preventing the fall of the fire-resistant interlayer material in the third embodiment. As shown in Figure 18, the fall prevention fitting 140 includes a first flat plate portion 141, a second flat plate portion 142, and a notch portion 143.

[0150] The first flat plate portion 141 is inserted into the space S formed by the connecting member 320 and the floor 200, which connects the structural frame, such as the floor 200 and beams (not shown here), to the exterior wall 300. The first flat plate portion 141 is intended to close the space S formed by the connecting member 320 and the floor 200, and is punched out inside the connecting member 320 in a shape almost identical to the space S formed by the connecting member 320 and the floor 200. The second flat plate portion 142 is for closing the interlayer G (not shown here), and is formed as a rectangle with a width sufficient to close the interlayer G.

[0151] At the connection between the first flat plate section 141 and the second flat plate section 142, a notch 143 is formed on one side, sized to accommodate one of the two lip sections 324 of the connecting member 320, which is a lip channel steel, when the fall prevention fitting 140 is installed in the space S and the interlayer G.

[0152] When the fall prevention fitting 140 is installed in the space S and the inter-story G, the planar direction of the fall prevention fitting 140 is oriented vertically, and the first flat plate portion 141 is inserted into the interior of the connecting member 320 through the opening of the connecting member 320.

[0153] After the first flat plate portion 141 is inserted into the interior of the connecting member 320 through the opening of the connecting member 320, the fall prevention fitting 140 is rotated around a rotation axis P directed in the direction of connecting the first flat plate portion 141 and the second flat plate portion 142, until the fall prevention fitting 140 is horizontal, with one lip portion 324 protruding in the interlayer G being accommodated in the notch portion 143.

[0154] As a result, the first flat plate portion 141, which was oriented vertically, is turned horizontally to close the space S formed between the connecting member 320 and the floor 200 inside the connecting member 320, the second flat plate portion 142 is turned horizontally to close the interlayer G, and the lip portion 324 is accommodated in the notch portion 143.

[0155] Figure 19 shows a rear cross-sectional view and a top view, respectively, of a state in which a fall prevention fitting for preventing the fire-resistant interlayer material from falling in the third embodiment is installed in the space of the connecting material between layers, and a state in which the fire-resistant interlayer material in the third embodiment is pressed into the space formed inside the connecting material 320 by the floor 200 which has entered inside the connecting material 320, thereby closing the interlayer.

[0156] Figure 19(A) shows a state in which a fall prevention fitting 140, which prevents the fire-resistant interlayer material 100 from falling in the third embodiment, is installed in the space S of the connecting material 320 in the interlayer G. As shown in Figure 19(A), first, support fittings 400 and metal plates 500 for supporting the fire-resistant interlayer material 10, which is a prior art invention as disclosed in, for example, Patent Document 2, are installed in the interlayer G formed between the floor 200 and the outer wall 300.

[0157] Next, the fall prevention fitting 140 is inserted into the space S through the opening of the connecting member 320 while the first flat plate portion 141 of the fall prevention fitting 140 is rotated so that the first flat plate portion 141 of the fall prevention fitting 140 is oriented toward the connecting member 320 and the planar direction of the fall prevention fitting 140 is vertical.

[0158] After the first flat plate portion 141 is inserted into the interior of the connecting member 320 through the opening of the connecting member 320, the fall prevention fitting 140 is rotated around a rotation axis P oriented in the direction connecting the first flat plate portion 141 and the second flat plate portion 142 until the fall prevention fitting 140 is horizontal.

[0159] At this time, since a support bracket 400 and a metal plate 500 are installed at the lower part of the fall prevention fitting 140, the fall prevention fitting 140 installed in the space S and the inter-story G is installed on top of the metal plate 500 and fixed in a predetermined position.

[0160] As a result, the first flat plate portion 141 closes the space S formed inside the connecting member 320, and the second flat plate portion 142 closes the interlayer G on the outside of the opening side of the connecting member 320. Therefore, even if the metal plate 500 is installed so that there is a gap between it and the opening side of the connecting member 320, the gap can be closed with the fall prevention fitting 140.

[0161] Figure 19(B) shows the state in the third embodiment where the fire-resistant interlayer material 100 is pressed into the space S formed inside the connecting material 320 by the floor 200 which has entered the interior of the connecting material 320, thereby closing the interlayer G.

[0162] As shown in Figure 19(B), first, the fire-resistant interlayer material 100 is rotated so that the upper covering material 130 is oriented toward the outer wall 300 and the first core material 110 is oriented toward the connecting material 320.

[0163] Next, the first core material 110, with its front side facing the connecting material 320, is compressed so that the width between the bottom surface of the first core material 110 and the top covering material 130 becomes smaller than the width of the opening in the connecting material 320, by oriented the bottom surface of the first core material 110 toward the top covering material 130 in order to press it into the interior of the connecting material 320.

[0164] Furthermore, after the first core material 110 is pressed into the interior of the connecting material 320 through the opening of the connecting material 320, the lip portion 324 is accommodated between the first core material 110 and the second core material 120 by providing a notch 133 in the upper surface covering material 130, and the fire-resistant interlayer material 100 is rotated clockwise around a rotation axis O oriented in the direction connecting the first core material 110 and the second core material 120 until the upper surface covering material 130 is horizontal on the upper surface.

[0165] Next, the fire-resistant interlayer material 100 is rotated clockwise around the rotation axis O until the top covering material 130 is horizontal on the top surface, so that the fire-resistant interlayer material 100 is in a horizontal position with the top covering material 130 facing upwards. At this time, because the notch 133 is provided in the top covering material 130, one of the lip portions 324 is housed between the first core material 111 and the second core material 121.

[0166] Then, the fire-resistant interlayer material 100 is moved downward until the upper surface covering material 130 of the fire-resistant interlayer material 100 is at the same position as the upper surface of the floor 200. This allows the fire-resistant interlayer material 100 to close off the space S in the interlayer G and the interlayer G.

[0167] With the fire-resistant interlayer material 100 sealing the space S and the interlayer G, the release paper 132 protecting the adhesive surface is peeled off from the extension portion 131, and the exposed adhesive surface of the extension portion 131 is attached to the floor 200 or exterior wall material 310, thereby fixing the fire-resistant interlayer material 100 in place.

[0168] [Fourth Embodiment] Next, a fourth embodiment of the present invention will be described. The fire-resistant interlaminar material of this embodiment is substantially the same as that shown in the first to third embodiments, except for the difference in the position and number of cuts. For this reason, components that are substantially the same as those in the first to third embodiments will be denoted by the same reference numerals, and their descriptions will be omitted as appropriate.

[0169] Figure 20 is a top view showing the interlayer formed between the outer wall attached to the floor via a connecting member which is a lip channel steel, and the floor 200 that extends into the interior of the connecting member in the interlayer, and a front view, rear view, top view, bottom view, left side view, and right side view showing the details of the fire-resistant interlayer material in the fourth embodiment.

[0170] Figure 20(A) is a top view showing the interlayer space formed between the outer wall 300, which is attached to the floor 200 via a connecting member 320 which is a lip channel steel, and the floor 200, and the space S formed inside the connecting member 320 by the floor 200 which extends into the interior of the connecting member 320 in the interlayer space G.

[0171] As shown in Figure 20(A), an interlayer G is formed between the floor 200 and the exterior wall 300. The exterior wall 300, which consists of multiple exterior wall materials 310, is attached to one flange portion 322 that rises from the web portion 321 of the connecting member 320, which is a lip channel steel. The other flange portion 323 and the lip portion 324 on the floor 200 side, which is formed by closing the opening on the opening side from the flange portion 323, are embedded inside the floor 200 such that the opening side end of the lip portion 324 on the floor 200 side is installed near the side of the floor 200.

[0172] Inside the connecting member 320, a space S is formed, surrounded by the web portion 321, the flange portion 322, the lip portion 324, and the floor 200. In the fire-resistant interlayer material 100 of this embodiment, the space S in the interlayer G and the interlayer G can be easily and reliably closed.

[0173] Figure 20(B) shows a front view, rear view, top view, bottom view, left side view, and right side view of the fire-resistant interlayer material 100 in the fourth embodiment. As shown in Figure 20(B), the fire-resistant interlayer material 100 comprises a first core material 110, a second core material 120, and an upper covering material 130.

[0174] In this embodiment, the top covering material 130 is provided with a notch 133 on the right side of the extension of the first connecting portion where the top surfaces of the first core material 110 and the second core material 120 are connected, extending to a position that separates a portion of the right side of the first core material 110 and the second core material 120.

[0175] Furthermore, on the left side of the extension of the first connecting portion where the upper surfaces of the first core material 110 and the second core material 120 of the upper surface covering material 130 are connected, a notch 133 is provided up to just before the first connecting portion.

[0176] The notch 133 provided on the right side of the fire-resistant interlayer material 100 is installed such that when the fire-resistant interlayer material 100 is installed in the interlayer G, the lip portion 324 on the outer wall 300 side is inserted between the first core material 110 and the second core material 120, and the lip portion 324 on the floor 200 side is inserted into the notch 133 provided on the left side of the upper covering material 130 without getting caught between the first core material 110 and the second core material 120.

[0177] As described above, the fire-resistant interlayer material 100 has a first core material 110 that is press-fitted into the interior through the opening of the connecting material 320 and a second core material 120 that is press-fitted into the interlayer G, which are connected by the upper covering material 130. Therefore, the space S formed inside the connecting material 320 and the interlayer G can be easily and reliably closed.

[0178] Furthermore, the notches 133 provided in the upper covering material 130 of the floor 200 do not extend to a position that separates the first core material 110 and the second core material 120, and the lip portion 324 does not enter between the first core material 110 and the second core material 120, so that moisture such as rainwater does not penetrate into the interlayer G or space S.

[0179] [Fifth Embodiment] Next, a fifth embodiment of the present invention will be described. The fire-resistant interlayer material of this embodiment is substantially the same as that shown in the first to fourth embodiments, except for differences in the shapes of the first and second core materials and the shape of the outer covering material. For this reason, components that are substantially the same as those in the first to fourth embodiments will be denoted by the same reference numerals, and their descriptions will be omitted as appropriate.

[0180] Figure 21 is a bottom view showing details of the fire-resistant interlayer material in the fifth embodiment. As shown in Figure 21, the fire-resistant interlayer material 100 comprises a first core material 110, a second core material 120, and an upper surface covering material 130.

[0181] In the first to fourth embodiments of the fire-resistant interlaminar material 100, the first core material 110 and the second core material 120 are completely separated, and the first outer covering material 112 completely covers the circumferential surface of the first core material 111, and the second outer covering material 122 completely covers the circumferential surface of the second core material 121. However, in this embodiment, the fire-resistant interlaminar material 100 will be described in an example in which the first core material 110 and the second core material 120 are formed integrally.

[0182] The first core material 110 is pressed into the space S formed inside the connecting member 320 that connects the structural frame, which is the framework of floors 200 and beams (not shown here), to the exterior wall 300, in order to close off the space S in the inter-story G. The second core material 120 is also intended to close off the inter-story G (not shown here).

[0183] The first core material 110 and the second core material 120 consist of a first core material 111 and a second core material 121, with the first core material 111 and the second core material 121 being integrally formed, and notches K into which the lip portion 324 is inserted are formed on the right side and the left side.

[0184] An outer covering material 160 is provided on the circumferential surfaces of the first core material 111 and the second core material 121 so as to completely cover the circumferential surfaces of the first core material 111 and the second core material 121. The outer covering material 160 not only completely covers the circumferential surfaces of the first core material 111 and the second core material 121, but also covers the inside of the notch K, forming a receiving portion C that accommodates the lip portion 324 inserted into the notch K.

[0185] Furthermore, notches 133 are provided on both sides of the extended portion of the first connecting section where the upper surfaces of the first core material 110 and the second core material 120 of the upper surface covering material 130 are connected. The notches 133 are installed so that the lip portion 324 can be inserted when the fire-resistant interlayer material 100 is installed in the interlayer G.

[0186] As described above, the fire-resistant interlayer material 100 has a first core material 110 that is press-fitted into the interior through the opening of the connecting material 320 and a second core material 120 that is press-fitted into the interlayer G, which are connected by the upper covering material 130. Therefore, the space S formed inside the connecting material 320 and the interlayer G can be easily and reliably closed.

[0187] [Sixth Embodiment] Next, a sixth embodiment of the present invention will be described. The fire-resistant interlayer material of this embodiment is substantially the same as that shown in the first to fifth embodiments, except that the connecting material that connects the structural frame on which the fire-resistant interlayer material is installed to the exterior wall is a channel steel without a lip portion. For this reason, components that are substantially the same as those in the first to fifth embodiments will be given the same reference numerals and their descriptions will be omitted as appropriate.

[0188] Figure 22 shows a rear cross-sectional view and a top view illustrating the interlayer formed between the outer wall, which is attached to the floor via a connecting member made of channel steel, and the space of the connecting member within the interlayer, as well as a rear cross-sectional view and a top view illustrating the state after the fire-resistant interlayer material has been pressed into and fixed into the space of the connecting member.

[0189] Figure 22(A) is a rear cross-sectional view and a top view showing the interlayer space formed between the outer wall 300, which is attached to the floor 200 via a connecting member 320 made of channel steel, and the floor 200, as well as the space S of the connecting member 320 in the interlayer space G. As shown in Figure 22(A), an interlayer G is formed between the floor 200 and the exterior wall 300. The exterior wall 300, which consists of multiple exterior wall materials 310, is attached to one flange portion 322 that rises from the web portion 321 of the connecting member 320, which is a channel steel, and the other flange portion 323 is attached to the floor 200.

[0190] In this case, if the thickness of the connecting member 320 increases, specifically if the thickness of the flange portion 322 and flange portion 323 increases, the step difference between the flange portion 322 and the outer wall 300, and the step difference between the flange portion 323 and the floor 200 will increase.

[0191] In this state, even if the conventional fire-resistant interlayer material 10 is pressed into the inside of the connecting material 320, step gaps will occur between the step between the flange portion 322 and the outer wall 300 and the fire-resistant interlayer material 10, and between the step between the flange portion 323 and the floor 200 and the fire-resistant interlayer material 10. If these step gaps occur, it will not be possible to completely prevent the spread of fire to the upper and lower floors.

[0192] Therefore, in this embodiment, the following will be explained using an example of easily and reliably closing the space S in the interlayer G formed by the web portion 321, flange portion 322, and flange portion 323 formed on the inside of the connecting member 320, which is a channel steel, and the interlayer G itself.

[0193] Figure 22(B) shows a rear cross-sectional view and a top view of the state after the fire-resistant interlayer material 100 has been pressed into and fixed in the space S of the connecting material 320. As shown in Figure 22(B), first, the upper surface covering material 130 of the fire-resistant interlayer material 100 is oriented upward, and the first core material 110 is oriented toward the connecting material 320.

[0194] Next, the first core material 110, with its front side facing the connecting material 320, is compressed in width W so that the width W of the first core material 110 becomes smaller than the width of the opening in the connecting material 320, in order to press-fit it into the interior of the connecting material 320.

[0195] Furthermore, after the first core material 110 is pressed into the interior of the connecting material 320 through the opening of the connecting material 320, the second core material 120 is pressed into the interlayer G while the upper covering material 130 of the fire-resistant interlayer material 100 is lowered until it is at the same position as the upper surface of the floor 200, by accommodating the flange portion 322 and the corners of the ends of the flange portion 323 in the upper covering material 130.

[0196] With the fire-resistant interlayer material 100 sealing the space S and the interlayer G, the release paper 132 protecting the adhesive surface is peeled off from the extension portion 131, and the exposed adhesive surface of the extension portion 131 is attached to the floor 200 or exterior wall material 310, thereby fixing the fire-resistant interlayer material 100 in place. [Explanation of Symbols]

[0197] 100 Fireproof interlayer material 110 First core material 111 First core material 112 First outer covering material 120 Second core material 121 Second core material 122 Second outer covering material 130 Top covering material 131 Extension 132 Release paper 133 Cut section D1 Depth Dimension D2 Depth Dimension G Gap H dimension W width dimension

Claims

1. In a fire-resistant interlayer material that closes the interlayer formed between the floor and the exterior wall material of a building, and the space formed inside the channel steel connecting the exterior wall material and the structural frame of the building, A first core material is inserted through the opening of the channel steel and closes the space, A second core material that closes the interlayer on the outside of the opening of the channel steel, A connecting portion that connects the first core material and the second core material, Equipped with, The channel steel is a lip channel steel having a lip provided to close the opening, A notch for accommodating the lip is located between the first core material and the second core material. Equipped with, The aforementioned cut portion is The inner diameter width of the channel steel when the installed space is closed is such that the first core material and the second core material, which are inserted into the space facing the longitudinal direction of the opening, rotate to accommodate the lip, thereby forming a rotating lip housing section. A fire-resistant interlayer material characterized by the following features.

2. The aforementioned connecting portion is It is a sheet material provided so as to connect the first core material and the second core material. A fire-resistant interlayer material according to claim 1, characterized by the above.

3. The aforementioned sheet material is It is an upper sheet material provided so as to connect the upper surfaces of the first core material and the second core material. A fire-resistant interlayer material according to claim 2, characterized by the above.

4. The aforementioned top sheet material is The upper surface covering material covers at least the entire upper surface of the first core material and the second core material. A fire-resistant interlayer material according to claim 3, characterized by the above.

5. A third core material is inserted into the gap formed between the channel steel and the floor to close the gap, A second connecting portion is rotatably connected to the upper surfaces of the third core material and the second core material with the upper surface of the second core material serving as a support axis, The fire-resistant interlayer material according to claim 1, characterized by comprising the above.

6. The second connecting portion is, The material is a full-top covering material that covers at least the entire upper surface of the first core material, the second core material, and the third core material. A fire-resistant interlayer material according to claim 5, characterized by the above.

7. Support fittings for supporting the fire-resistant material filled between the layers, and fall prevention fittings for supporting the first core material and the second core material from below to prevent them from falling, The fire-resistant interlayer material according to claim 1, characterized by comprising the above.

8. The aforementioned fall prevention fitting is A first flat plate portion that closes the aforementioned space, A second flat plate portion that closes the space between the layers on the outside of the opening, A flat plate connecting portion that connects the first flat plate portion and the second flat plate portion, The fire-resistant interlayer material according to claim 7, characterized by comprising the above.

9. The channel steel is a lip channel steel having a lip provided to close the opening, The aforementioned fall prevention fitting is A notch for accommodating the lip is located between the first flat plate portion and the second flat plate portion. The fire-resistant interlayer material according to claim 8, characterized by comprising the above.

10. The aforementioned fall prevention fitting is A connecting material, a metal plate that closes the gap between the channel steel and the floor, is inserted into the gap formed between the channel steel and the floor. The fire-resistant interlayer material according to claim 8, characterized by comprising the above.

11. In a fire-resistant method for sealing the interlayer space formed between the floor and the exterior wall material of a building, and the space formed inside the channel steel connecting the exterior wall material and the structural frame of the building, The process involves inserting the first core material through the opening of the channel steel to close the space, The second core material, connected to the first core material via a connecting portion, closes the interlayer space on the outside of the opening of the channel steel; Equipped with, The aforementioned connecting portion is A lip channel steel having a lip provided to close the opening, a notch for housing the lip between the first core material and the second core material, Equipped with, The aforementioned cut portion is The inner diameter width of the channel steel when the installed space is closed is such that the first core material and the second core material, which are inserted into the space facing the longitudinal direction of the opening, rotate to accommodate the lip, thereby forming a rotating lip housing section. A fire-resistant method characterized by the following.

12. The aforementioned first core material is The inner diameter width of the channel steel when the installed space is closed is oriented in the longitudinal direction of the opening and inserted into the space. The first core material and the second core material are rotated and installed until their upper surfaces are horizontal. The fire-resistant method according to claim 11, characterized by the above.

13. A third core material is inserted into the gap formed between the channel steel and the floor to close the gap, A second connecting portion is rotatably connected to the upper surfaces of the third core material and the second core material with the upper surface of the second core material serving as a support axis, Equipped with, Before inserting the first core material into the space, the third core material is rotated with the second connecting portion as a support axis. The fire-resistant method according to claim 11, characterized by the above.

14. In a fire-resistant structure that closes the interlayer formed between the floor and the exterior wall material of a building, and the space formed inside the channel steel connecting the exterior wall material and the structural frame of the building, A first core material is inserted through the opening of the channel steel and closes the space, A second core material that closes the interlayer on the outside of the opening of the channel steel, A connecting portion that connects the first core material and the second core material, Equipped with, The channel steel is a lip channel steel having a lip provided to close the opening, A notch for accommodating the lip is located between the first core material and the second core material. Equipped with, The aforementioned cut portion is The inner diameter width of the channel steel when the installed space is closed is such that the first core material and the second core material, which are inserted into the space facing the longitudinal direction of the opening, rotate to accommodate the lip, thereby forming a rotating lip housing section. A fire-resistant structure characterized by the following features.

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