JP7720168B2 - Fixing structure for building frame materials - Google Patents

Description

The present invention relates to a fixing structure for building frame materials.

As one technology for suppressing the combustion of wooden components (e.g., wooden pillars and wall materials) that make up the framework of a building, wooden structural materials have been disclosed that comprise a single wooden material and a covering material (e.g., a covering material consisting of a fire-retardant layer and a burning margin layer) that is attached to the outside of the single wooden material (see, for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 2008-2189

When attaching the frame material that forms the framework of the fitting to the wooden structural member, for example, if the frame material is secured using fasteners attached only to the covering material, there is a risk that the frame material may become detached from the wooden structural member if the covering material burns in the flames of a fire that breaks out around the fitting. Therefore, there is room for improvement in terms of reducing fire damage to wooden support members such as wooden structural members.

The present invention aims to solve the problems of the prior art described above by providing a fixing structure for building frame materials that can reduce damage to wooden support members caused by fire.

In order to solve the above-mentioned problems and achieve the object, the fixing structure for a frame material for a fixture as set forth in claim 1 is a fixing structure for fixing a frame material that constitutes a frame of a fixture to be provided on the skeleton of a building to a wooden support member among the members that constitute the skeleton, and is provided with: a support-side fire-retardant covering material that is a fire-retardant covering material provided so as to cover at least a portion of the outer surface of the support member, the fire-retardant covering material being a fire-retardant covering material for restraining combustion of the support member; and connecting means provided between the frame material and the support-side fire-retardant covering material for connecting the frame material and the support member, the connecting means comprising a connecting means main body and a connecting means main body that connects the connecting means main body to the support member. and a support-side fixing member for fixing the support member to the connecting means body, the support-side fixing member being inserted into the support member so as to penetrate the connecting means body and the support-side combustion suppression covering material, the support-side combustion suppression covering material comprising a first support-side combustion suppression covering material located on the connecting means side, the first support-side combustion suppression covering material being configured so that the entire outer surface of the support member on the connecting means side is covered by the first support-side combustion suppression covering material, and the support-side combustion suppression covering material is arranged to cover at least one of the visible surfaces of the connecting means body, and is a combustion suppression covering material for suppressing combustion of the connecting means.

The fixing structure for a frame material for building fixtures described in claim 2 is the fixing structure for a frame material for building fixtures described in claim 1, in which the support side fire-retardant covering material is provided with two fire-retardant covering materials arranged in a stacked manner.

The fixing structure for a frame material for building materials described in claim 3 is the fixing structure for a frame material for building materials described in claim 1 or 2, in which the frame material comprises a frame material main body which is a hollow body formed so that its cross-sectional shape is open toward the support member side, and a plurality of fixing materials arranged in parallel at a predetermined interval along the length of the frame material on the open end side of the frame material main body, and the connection means is fixed to the fixing materials.

The fixing structure for a frame material for building fixtures described in claim 4 is a fixing structure for a frame material for building fixtures described in any one of claims 1 to 3, in which the connecting means is provided so that the connecting means is located within a space surrounded only by the flame-retardant covering material, which includes at least the support side flame-retardant covering material and the connection side flame-retardant covering material, and the steel frame material.

The fixing structure for a frame material for building materials described in claim 5 is a fixing structure for a frame material for building materials described in any one of claims 1 to 4, in which multiple connection side fire suppression covering materials are arranged so that the connection means is not exposed to the outside.

The fixing structure for a frame material for building materials described in claim 6 is a fixing structure for a frame material for building materials described in any one of claims 1 to 5 , in which the support side combustion suppression coating material comprises a first support side combustion suppression coating material located on the connection means side, and a second support side combustion suppression coating material formed separately from the first support side combustion suppression coating material and located on the visible surface side of the support member, and the second support side combustion suppression coating material and the connection side combustion suppression coating material are formed integrally.
The fixing structure for a frame material for building materials described in claim 7 is a fixing structure for a frame material for building materials described in any one of claims 1 to 6 , in which the support side combustion-suppressing covering material and the connection side combustion-suppressing covering material are formed separately.
The fixing structure for a frame material for building fixtures described in claim 8 is a fixing structure for a frame material for building fixtures described in any one of claims 1 to 7 , in which the support side combustion suppression coating material comprises a first support side combustion suppression coating material located on the connection means side and a second support side combustion suppression coating material located on the visible surface side of the support member, and the second support side combustion suppression coating material and the connection side combustion suppression coating material are approximately flush with each other.

According to the fixing structure for a building frame member of claim 1, the fixing structure includes a support-side fire-suppressing covering material that covers at least a portion of the outer surface of a wooden support member, and a connecting means that is provided between the frame member and the support-side fire-suppressing covering material. The connecting means includes a support-side fixing member that fixes the connecting means main body to the wooden support member and that is inserted into the wooden support member so as to penetrate the connecting means main body and the support-side fire-suppressing covering material. This prevents the wooden support member from being burned by the flames of a fire in the event of a fire around the building frame, and prevents the frame member from being detached from the wooden support member, thereby reducing damage to the wooden support member due to the fire. Furthermore, the fixing position of the frame member and the wooden support member can be easily adjusted during installation compared to when no connecting means is provided, thereby improving the attachability of the frame member.
In addition, a connection-side combustion-suppressing covering material is provided to cover at least one of the visible surfaces of the connection means body, thereby preventing the heat of the fire from being transmitted to the connection means body, further reducing damage to the wooden support member caused by the fire.

According to the fixing structure of the frame material for building fixtures described in claim 5 , multiple connection-side combustion-suppressing covering materials are arranged to prevent the connection means from being exposed to the outside, thereby preventing the connection means from being exposed to the outside and making it possible to maintain the design of the building fixtures and their surroundings.

According to the fixing structure for the frame material for building materials described in claim 6 , the second support side combustion suppression covering material and the connection side combustion suppression covering material are formed as a single unit, which makes it easier to install the fixing structure compared to when the second support side combustion suppression covering material and the connection side combustion suppression covering material are formed separately, thereby making it possible to improve the installability of the fixing structure.

According to the fixing structure of the frame material for building materials described in claim 7 , the support side combustion suppression covering material and the connection side combustion suppression covering material are formed separately, so that the support side combustion suppression covering material and the connection side combustion suppression covering material can be installed in a configuration that suits the situation, and it is possible to install the support side combustion suppression covering material and the connection side combustion suppression covering material according to needs.

According to the fixing structure of the frame material for building fixtures described in claim 8 , the second support side combustion suppression covering material and the connection side combustion suppression covering material are made approximately flush, so that a sense of unity can be ensured between the design of the second support side combustion suppression covering material and the design of the connection side combustion suppression covering material, compared to when the second support side combustion suppression covering material and the connection side combustion suppression covering material are not made flush, making it easier to maintain the design of the building fixtures and their surroundings.

1 is a front view of a fixture according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1 (partially omitted). FIG. 10 is a diagram showing a fitting according to a second embodiment, showing the area corresponding to FIG. 2. 10 is a diagram showing a modified example of the fixing structure of the frame material according to the second embodiment, and shows the area corresponding to FIG. 2. FIG. FIG. 10 is a diagram showing a fitting according to embodiment 3, showing the area corresponding to FIG. 2. 10 is a diagram showing a modified example of the fixing structure of the frame material according to the third embodiment, and shows the area corresponding to FIG. 2. FIG. 10 is a diagram showing a modified example of the fixing structure of the frame material according to the third embodiment, and shows the area corresponding to FIG. 2. FIG. 10 is a diagram showing a modified example of the fixing structure of the frame material according to the third embodiment, and shows the area corresponding to FIG. 2. FIG. 10 is a diagram showing a modified example of the fixing structure of the frame material according to the first embodiment, showing the area corresponding to FIG. 2. FIG. 10 is a diagram showing a modified example of the fixing structure of the frame material according to the first embodiment, showing the area corresponding to FIG. 2. FIG. 10 is a diagram showing a modified example of the fixing structure of the frame material according to the first embodiment, showing the area corresponding to FIG. 2. FIG.

The following describes in detail an embodiment of the fastening structure for a door and window frame material according to the present invention, with reference to the accompanying drawings. First, [I] the basic concept of the embodiment will be explained, followed by [II] specific details of the embodiment, and finally, [III] modified examples of the embodiment will be explained. However, the present invention is not limited to the embodiment.

[I] Basic Concept of the Embodiment First, the basic concept of the embodiment will be explained. The embodiment generally relates to a fixing structure for fixing a frame material constituting a frame of a fixture to a wooden support member among the members constituting the skeleton of a building.

Here, the specific structure and type of "building" is arbitrary, but the concept includes, for example, public facilities, commercial facilities, detached houses, and multi-family housing such as apartments and condominiums.

Furthermore, "doors" refers to structures installed in openings in buildings that restrict or limit access through the opening, and is a concept that includes, for example, door devices (such as swing doors, sliding doors, and folding doors), window devices that can be opened and closed, and window devices that cannot be opened and closed (so-called fixed windows). Furthermore, an "opening in a building" is an opening formed in a part of the building's framework (such as a wall, floor, or ceiling) to accommodate an entrance or window.

Furthermore, the specific structure and type of "members constituting the framework" are arbitrary, but the concept includes, for example, wall materials, pillars, beams, flooring materials, ceiling materials, etc. Furthermore, the specific structure and type of "wooden support members" are arbitrary, but the concept includes, for example, wooden wall materials, wooden pillars, wooden beams, wooden flooring materials, wooden ceiling materials, etc.

In the following embodiments, we will explain the case where the fixture is a single-wing hinged door installed in an opening in an interior wall material (wooden support member) that divides rooms inside a building such as a public facility (e.g., city hall).

[II] Specific Contents of the Embodiment Next, specific contents of the embodiment will be described.

First Embodiment
First, we will explain the fixing structure of the building frame material according to embodiment 1. In this embodiment 1, a support-side combustion-suppressing covering material (described later) and a connection-side combustion-suppressing covering material (described later) are integrally formed.

(composition)
First, the configuration of a fixture to which the fixing structure of the fixture frame material according to embodiment 1 is applied will be described.

In the following explanation, the X direction in Figure 1 will be referred to as the left-right direction of the fixture (-X direction will be the left direction of the fixture, and +X direction will be the right direction of the fixture), the Y direction in Figure 2 will be referred to as the front-to-back direction of the fixture (+Y direction will be the front direction of the fixture (towards the outside of the room) and -Y direction will be the rear direction of the fixture (towards the inside of the room)), and the Z direction in Figure 1 will be referred to as the up-down direction of the fixture (+Z direction will be the top direction of the fixture, and -Z direction will be the bottom direction of the fixture).

The fixture 1 is constructed using, for example, a known single-wing hinged door, and as shown in Figure 1, it generally comprises a frame body 10, an opening/closing body 20, and a hinge portion 30. However, unless otherwise specified, the structure of the fixture 1 is the same as that of a conventional door and will not be described here.

The various components that make up the fitting 1 may be attached (or connected) to one another using any method, but examples include attaching (or connecting) the attachment component to the mating component using fasteners (e.g., rivets, mounting screws, screws, etc.), welding, adhesives, double-sided tape, etc., via mounting holes (e.g., rivet holes, screw holes, screw holes, etc.) formed in the attachment component or the mating component.

(Configuration - Frame)
The frame 10 is installed on the periphery of an opening 4 formed in a wooden support member 3 that constitutes the building's main body 2 (specifically, a wooden interior wall material whose length in the front-to-back direction is shorter than that of the frame 10, as shown in Figure 2), and as shown in Figure 1, it comprises a pair of left and right vertical frame members 11, 12 and a pair of top and bottom horizontal frame members 13, 14 made of steel (for example, steel, stainless steel, etc.).

These vertical frame members 11, 12 and horizontal frame members 13, 14 (excluding the horizontal shoe-hanging frame member 14, described below) are each fixed to the wooden support member 3 by a fixing structure, described below, and when combined with each other, they are formed into a roughly rectangular ring-shaped front shape.

In the following, as necessary, of the pair of left and right vertical frame members 11, 12, the vertical frame member 11 located on the trailing edge of the opening 4 will be referred to as the "trailing edge vertical frame member 11," and the vertical frame member 12 located on the leading edge of the opening 4 will be referred to as the "leading edge vertical frame member 12." Furthermore, of the pair of upper and lower horizontal frame members 13, 14, the horizontal frame member 13 located on the upper side of the opening 4 will be referred to as the "upper horizontal frame member 13," and the horizontal frame member 14 located on the lower side of the opening 4 will be referred to as the "sliding horizontal frame member 14." When there is no need to distinguish between the trailing edge vertical frame member 11, leading edge vertical frame member 12, upper horizontal frame member 13, and leading edge horizontal frame member 14, they will be collectively referred to simply as "frame members 15."

In addition, this door-end vertical frame member 12 is provided with a deadbolt receiver and a latch receiver (both not shown).

Of these, the deadbolt receiver is a deadbolt receiving means provided on the opening/closing body 20 for receiving a deadbolt (described below) when the opening 4 is closed by the opening/closing body 20 (hereinafter referred to as the "fully closed state"), and is located in a position corresponding to the deadbolt (described below). The latch receiver is a latch receiving means provided on the opening/closing body 20 for receiving a latch (described below), and is located in a position corresponding to the latch (described below). The configuration of the frame body 10 will be described in detail below.

(Configuration - Opening and closing body)
The opening/closing body 20 is a roughly plate-shaped body for opening and closing the opening 4, and as shown in Figure 1, it comprises an opening/closing body frame (not shown), an outdoor surface material 21, an indoor surface material (not shown), and a core material (not shown).

(Configuration - opening/closing body - opening/closing body frame)
The opening/closing body frame is primarily responsible for the rigidity of the opening/closing body 20. This opening/closing body frame is formed by combining multiple long steel reinforcement bones so that its front shape is a substantially rectangular ring, and specifically, it is configured with a pair of left and right longitudinal reinforcement bones and a pair of upper and lower lateral reinforcement bones. In addition, a plurality of intermediate longitudinal reinforcement bones are arranged side by side at intervals between the pair of left and right longitudinal reinforcement bones.

(Composition - Opening/closing body - Outdoor surface material, indoor surface material)
The outdoor surface material 21 is a surface material that covers one of two visible surfaces or at least one or more visible surfaces of the surface of the opening/closing body 20. The indoor surface material is a surface material that covers the other of two visible surfaces or at least one or more visible surfaces of the surface of the opening/closing body 20. The outdoor surface material 21 and the indoor surface material are formed, for example, from thin plate-shaped steel material (specifically, steel material or stainless steel material), and are arranged to cover the opening/closing body frame from both the outdoor and indoor sides of the room, and are fixed to the opening/closing body frame.

(Configuration - Opening and closing body - Core material)
The core material is filled inside the opening/closing body 20. This core material is made of, for example, a known core material, and is filled in the space surrounded by the opening/closing body frame, the exterior surface material 21, and the interior surface material.

(Configuration - Opening and closing body - Other configurations)
As shown in FIG. 1, the door end of the opening/closing body 20 is provided with a handle portion 22 for the user to operate the opening/closing body 20 to open and close, a locking device 23 for locking the opening/closing body 20, which is equipped with a deadbolt (not shown), and a latch (not shown) for maintaining the opening/closing body 20 in a fully closed position regardless of whether the opening/closing body 20 is locked by the locking device 23.

(Configuration - Hinge section)
The hinge section 30 is for pivotally supporting the opening/closing body 20 so that it can rotate freely relative to the trailing edge vertical frame member 11. This hinge section 30 is configured using a known flag hinge or the like, and as shown in Fig. 1, a plurality of hinge sections 30 are arranged side by side at intervals from each other in the vertical direction at the trailing edge end (the right edge in Fig. 1) of the opening/closing body 20, and are attached to the opening/closing body 20 and the trailing edge vertical frame member 11 by fasteners or the like.

(Configuration - Details of the configuration of the door end side vertical frame material and door front side vertical frame material)
Next, we will explain the details of the configuration of the trailing edge vertical frame member 11 and the leading edge vertical frame member 12 of the frame body 10. However, unless otherwise specified, the trailing edge vertical frame member 11 and the leading edge vertical frame member 12 can be manufactured in any shape, by any method, and with any material.

In embodiment 1, as shown in Figures 1 and 2, the trailing edge vertical frame member 11 and the leading edge vertical frame member 12 each include a vertical frame member main body 11a and a vertical side fixing member (not shown).

(Configuration - Details of the configuration of the vertical frame material on the end of the door and the vertical frame material on the front side - Vertical frame material body)
The vertical frame body 11a is the basic structure of the trailing-end vertical frame member 11 (or leading-end vertical frame member 12). This vertical frame body 11a is a hollow body formed so that its cross section along the X-Y plane is roughly U-shaped and open outward in the left-right direction, and is formed over almost the entire length of the opening 4 in the vertical direction.

As shown in Figure 2, the vertical frame main body 11a has a vertical side recess 11b. The vertical side recess 11b is designed to accommodate the opening/closing body 20 while avoiding interference between the vertical frame main body 11a and the opening/closing body 20 (a recess with a so-called "interlocking structure"). It is formed by recessing the portion of the vertical frame main body 11a that corresponds to the opening/closing body 20 outward in the left-right direction.

(Configuration - Details of the configuration of the vertical frame material on the end of the door and the vertical frame material on the front side - Vertical fixing material)
The vertical fixing members are used to fix the vertical frame member main body 11a to the wooden support member 3 and to reinforce the vertical frame member main body 11a. Each vertical fixing member is formed of a plate-like body. Specifically, the longitudinal length of each vertical fixing member is approximately the same as (or longer than) the longitudinal length of the open end of the U-shaped vertical frame member main body 11a, and the vertical length of each vertical fixing member is shorter than the vertical length of the vertical frame member main body 11a. A plurality of vertical fixing members are arranged side by side at a predetermined interval along the vertical direction on the open end side of the U-shaped vertical frame member main body 11a (specifically, on the outer end side of the vertical frame member main body 11a), and are fixed to the vertical frame member main body 11a by welding or the like.

(Configuration - Details of the configuration of the upper horizontal frame material)
Next, we will explain the details of the configuration of the upper horizontal frame member 13 of the frame body 10. However, unless otherwise specified, the upper horizontal frame member 13 can be manufactured in any shape, by any method, and with any material.

In embodiment 1, as shown in Figure 2, the upper horizontal frame member 13 comprises an upper horizontal frame member main body 13a and an upper fixing member 13b.

(Configuration - Details of the upper horizontal frame material - Upper horizontal frame material body)
The upper horizontal frame member main body 13a is the basic structure of the upper horizontal frame member 13. This upper horizontal frame member main body 13a is a hollow body formed so that its cross section along the YZ plane is roughly U-shaped and open outward in the vertical direction (upward in FIG. 2), and is formed over roughly the entire length of the opening 4 in the left-right direction.

As shown in Figure 2, the upper horizontal frame member main body 13a is provided with an upper recess 13c. The upper recess 13c is designed to accommodate the opening/closing body 20 while avoiding interference between the upper horizontal frame member 13 and the opening/closing body 20 (a recess with a so-called "interlocking structure"), and is formed by recessing the portion of the upper horizontal frame member main body 13a that corresponds to the opening/closing body 20 outward in the vertical direction (upward in Figure 2).

(Configuration - Details of the configuration of the upper horizontal frame material - Upper fixing material)
The upper fixing members 13b are used to secure the upper horizontal frame member body 13a to the wooden support member 3 and to reinforce the upper horizontal frame member body 13a. The upper fixing members 13b are formed as plates. Specifically, as shown in Fig. 2, the front-to-rear length of the upper fixing members 13b is approximately the same as (or longer than) the front-to-rear length of the open end of the U-shaped upper horizontal frame member body 13a, and the left-to-right length of the upper fixing members 13b is shorter than the left-to-right length of the upper horizontal frame member body 13a. The upper fixing members 13b are arranged side by side at a predetermined interval along the left-to-right direction at the open end of the U-shaped upper horizontal frame member body 13a (the outer end of the upper horizontal frame member body 13a in Fig. 2), and are fixed to the upper horizontal frame member body 13a by welding or the like.

(Details of the structure of the cross frame material)
Returning to Figure 1, we will now explain the details of the configuration of the sliding cross frame member 14 of the frame body 10. However, unless otherwise specified, the sliding cross frame member 14 can be manufactured in any shape, by any method, and with any material.

In embodiment 1, as shown in Figure 1, the sliding frame member 14 comprises a sliding frame member main body 14a and a sliding fixing member (not shown).

(Configuration - Details of the configuration of the horizontal frame material - Horizontal frame material body)
The sliding horizontal frame body 14a is the basic structure of the sliding horizontal frame body 14. This sliding horizontal frame body 14a is a hollow body formed so that its cross section along the YZ plane is roughly U-shaped and open outward in the vertical direction (specifically, downward), and is formed over roughly the entire length of the opening 4 in the left-right direction.

(Configuration - Details of the configuration of the cross frame material - Fixing material for the cross frame)
The sliding fixing member is used to fix the sliding horizontal frame member main body 14a to the floor material 16 and to reinforce the sliding horizontal frame member main body 14a, and is constructed substantially the same as the upper fixing member 13b.

(Configuration - fixed structure)
Next, the fixing structure of the frame members 15 (specifically, the trailing edge vertical frame member 11, the leading edge vertical frame member 12, and the upper horizontal frame member 13) will be described.

This fitting 1 has a fixing structure for fixing the frame material 15 to the wooden support member 3 (specifically, the wooden interior wall material), and this fixing structure includes a fixing structure for the trailing edge vertical frame material 11, a fixing structure for the leading edge vertical frame material 12, and a fixing structure for the upper horizontal frame material 13.

The fixing structures of the trailing edge vertical frame member 11, leading edge vertical frame member 12, and upper horizontal frame member 13 are all substantially identical in configuration, so only the configuration of the fixing structure of the upper horizontal frame member 13 will be described below (the same applies to the fixing structures of the trailing edge vertical frame member 11, leading edge vertical frame member 12, and upper horizontal frame member 13 in other embodiments).

(Configuration - Fixed structure - Fixed structure of upper horizontal frame material)
Next, the fixing structure of the upper horizontal frame member 13 will be described.

The fixing structure of the upper horizontal frame member 13 is a fixing structure for fixing the upper horizontal frame member 13 to the wooden support member 3, and the features of this fixing structure in embodiment 1 are as follows:

(Configuration - Fixed structure - Fixed structure of upper horizontal frame material - First feature)
First, as a first feature of the fixing structure of the upper horizontal frame member 13, as shown in FIG. 2, the fixing structure includes the support-side fire-suppressing covering material 40 and a connecting portion 70.

(Configuration - Fixing structure - Fixing structure of upper horizontal frame material - First feature - Support side fire retardant covering material)
The support-side combustion-suppressing covering material 40 is a combustion-suppressing covering material for suppressing combustion of the wooden support member 3. This support-side combustion-suppressing covering material 40 is configured to function as a fire-resistant covering material, a fire-preventing covering material, or a non-combustible material, and as shown in Figure 2, is provided so as to cover at least a portion of the outer surface of the wooden support member 3, and includes a first support-side combustion-suppressing covering material 50 and a second support-side combustion-suppressing covering material 60.

(Configuration - Fixing structure - Fixing structure of upper horizontal frame member - First feature - Support side fire retardant covering material - First support side fire retardant covering material)
The first support-side combustion-suppressing covering material 50 is part of the basic structure of the support-side combustion-suppressing covering material 40. As shown in Figure 2, this first support-side combustion-suppressing covering material 50 is provided so as to be located on the connection part 70 side, and includes a first inner combustion-suppressing covering material 51 and a first outer combustion-suppressing covering material 52.

(Configuration - Fixing structure - Fixing structure of upper horizontal frame member - First feature - Support side fire retardant covering material - First support side fire retardant covering material - First inner fire retardant covering material)
The first inner combustion-suppressing covering material 51 is part of the basic structure of the first support-side combustion-suppressing covering material 50. This first inner combustion-suppressing covering material 51 is formed in a substantially plate-like shape, and as shown in Fig. 2, it substantially covers the entire visible surface of the outer surface of the wooden supporting member 3 on the connection portion 70 side, and is disposed so as to abut against the wooden supporting member 3, and is fixed to the wooden supporting member 3 with fasteners and/or adhesives, etc.

Furthermore, the material of the first inner combustion-suppressing covering material 51 is optional, but in embodiment 1 it is made of a material that corresponds to the fire resistance performance of the wooden support member 3. Specifically, it is made of reinforced gypsum board, which is a material that corresponds to the performance of the fire-resistant structure (the performance required to prevent the collapse and spread of the wooden support member 3 due to the fire until the fire is extinguished).

However, without being limited to this, the material may be made of a material other than reinforced gypsum board that meets the performance requirements of a fire-resistant structure, or may be made of a material that meets the performance requirements of a quasi-fire-resistant structure (performance required to suppress the spread of fire). Examples include gypsum board, gypsum plaster, calcium silicate board, glass wool, urethane, rock wool, other fire-resistant materials (e.g., non-combustible materials, semi-non-combustible materials, and flame-retardant materials), fire-resistant materials, or combinations of these (the same applies to the materials of the other inner fire-retardant covering materials described below).

The thickness of the first inner combustion-suppressing covering material 51 is also optional, but in embodiment 1 it is set to a thickness that corresponds to the fire resistance of the wooden support member 3, specifically, to the performance of the fire-resistant structure (the same applies to the thickness of the other inner combustion-suppressing covering materials described below). However, this is not limiting, and the thickness may be set to, for example, a thickness that corresponds to the performance of the quasi-fire-resistant structure. Alternatively, it may be set to a thickness that is thicker than the thickness that corresponds to the performance of the fire-resistant structure or the performance of the quasi-fire-resistant structure.

(Configuration - Fixing structure - Fixing structure of upper horizontal frame member - First feature - Support side fire retardant covering material - First support side fire retardant covering material - First outer fire retardant covering material)
The first outer combustion-suppressing covering material 52 is another part of the basic structure of the first support-side combustion-suppressing covering material 50. This first outer combustion-suppressing covering material 52 is formed in a substantially plate-like shape and is provided outside the first inner combustion-suppressing covering material 51. Specifically, as shown in Fig. 2 , the first outer combustion-suppressing covering material 52 covers the entire outer surface of the first inner combustion-suppressing covering material 51 and is disposed so as to abut against the first inner combustion-suppressing covering material 51, and is fixed to the wooden support member 3 or the first inner combustion-suppressing covering material 51 by fasteners and/or adhesives, etc.

The material of the first outer fire-retardant covering material 52 is also optional, but in embodiment 1 it is made of a material that corresponds to the fire resistance performance of the wooden support member 3. Specifically, it is made of reinforced gypsum board, which is a material that corresponds to the performance of the fire-resistant structure and is the same material as the first inner fire-retardant covering material 51 (the same applies to the materials of the other outer fire-retardant covering materials described below).

However, the material is not limited to this, and may be made of a material other than the above-mentioned reinforced gypsum board that meets the performance requirements of a fire-resistant structure, or may be made of a material that meets the performance requirements of a quasi-fire-resistant structure (the performance required to suppress the spread of fire). For example, the material may be made of gypsum board, gypsum plaster, calcium silicate board, glass wool, urethane, rock wool, other fire-resistant or fire-resistant materials, or a combination of these (the same applies to the materials of the other outer fire-retardant covering materials described below).

Furthermore, the thickness of the first outer combustion-suppressing covering material 52 is arbitrary, but in embodiment 1, it is set to a thickness that corresponds to the fire resistance performance of the wooden support member 3, specifically, to the performance of the fire-resistant structure (note that the same applies to the thickness of the other outer combustion-suppressing covering materials described below). However, this is not limiting, and it may be set to a thickness that corresponds to the performance of the quasi-fire-resistant structure, for example. Alternatively, it may be set to a thickness that is thicker than the thickness that corresponds to the performance of the fire-resistant structure or the performance of the quasi-fire-resistant structure.

(Configuration - Fixing structure - Fixing structure of upper horizontal frame member - First feature - Support side fire retardant covering material - Second support side fire retardant covering material)
The second support-side combustion-suppressing covering material 60 is another part of the basic structure of the support-side combustion-suppressing covering material 40. This second support-side combustion-suppressing covering material 60 is formed separately from the first support-side combustion-suppressing covering material 50 and is provided so as to be located on the visible surface side of the wooden support member 3. Specifically, as shown in Figure 2, it is provided on the outdoor side and indoor side of the room relative to the wooden support member 3.

In the following, where necessary, of the second support-side combustion suppression covering materials 60, the second support-side combustion suppression covering material 60a located on the outdoor side of the room will be referred to as the "outdoor second support-side combustion suppression covering material 60a," and the second support-side combustion suppression covering material 60b located on the indoor side of the room will be referred to as the "indoor second support-side combustion suppression covering material 60b."

Furthermore, as shown in FIG. 2, the outdoor second support side combustion suppression covering material 60a and the indoor second support side combustion suppression covering material 60b each include a second inner combustion suppression covering material 61 and a second outer combustion suppression covering material 62.

(Configuration - Fixing structure - Fixing structure of upper horizontal frame member - First feature - Support side fire retardant covering material - Second support side fire retardant covering material - Second inner fire retardant covering material)
The second inner combustion-suppressing covering material 61 is part of the basic structure of the second support-side combustion-suppressing covering material 60. This second inner combustion-suppressing covering material 61 has substantially the same configuration as the first inner combustion-suppressing covering material 51, and as shown in Fig. 2, it covers substantially the entire visible surface of the wooden support member 3 among the outer surfaces of the wooden support member 3, is positioned so as to abut against the wooden support member 3, and is fixed to the wooden support member 3 with fasteners and/or adhesives, etc.

(Configuration - Fixing structure - Fixing structure of upper horizontal frame member - First feature - Support side fire retardant covering material - Second support side fire retardant covering material - Second outer fire retardant covering material)
The second outer fire-suppressing covering material 62 is another part of the basic structure of the second support-side fire-suppressing covering material 60. This second outer fire-suppressing covering material 62 is configured substantially identically to the first outer fire-suppressing covering material 52 and is provided outside the second inner fire-suppressing covering material 61. Specifically, as shown in Fig. 2 , the second outer fire-suppressing covering material 62 covers the entire outer surface of the second inner fire-suppressing covering material 61 and is disposed so as to abut against the second inner fire-suppressing covering material 61, and is fixed to the wooden support member 3 or the second inner fire-suppressing covering material 61 by fasteners and/or adhesives, etc.

(Configuration - Fixing structure - Fixing structure of upper horizontal frame material - First feature - Connection part)
The connection part 70 is a connection means for connecting the frame member 15 (specifically, the upper horizontal frame member 13) and the wooden support member 3. As shown in Figure 2, this connection part 70 is provided between the upper horizontal frame member 13 and the support-side combustion-suppressing covering material 40 (specifically, the first support-side combustion-suppressing covering material 50), and includes a connection means main body 71, a support-side fixing member 74, a frame-side fixing member 75, and a connection-side fixing member 76.

(Configuration - Fixing structure - Fixing structure of upper horizontal frame member - First feature - Connection part - Connection means main body)
The connecting means body 71 is the basic structure of the connecting portion 70, and as shown in FIG. 2, includes a frame-side connecting means body 72 and a support-side connecting means body 73.

(Configuration - Fixing structure - Fixing structure of upper horizontal frame material - First feature - Connection part - Connection means main body - Frame side connection means main body)
The frame-side connecting means body 72 is part of the basic structure of the connecting means body 71. This frame-side connecting means body 72 is a steel plate-like body configured so that its cross section along the YZ plane is approximately U-shaped, and is formed over approximately the entire length of the opening 4 in the left-right direction.

Specifically, as shown in Figure 2, the frame-side connection means main body 72 comprises a first frame-side connection piece 72a arranged to abut against the upper horizontal frame member 13 (specifically, the upper fixing member 13b), a second frame-side connection piece 72b connected to the end of the first frame-side connection piece 72a on the outside of the room, and a third frame-side connection piece 72c connected to the end of the first frame-side connection piece 72a on the inside of the room.

Furthermore, the specific sizes of the first frame-side connecting piece 72a, the second frame-side connecting piece 72b, and the third frame-side connecting piece 72c are arbitrary, but in embodiment 1 they are set as follows:

That is, as shown in Figure 2, the front-to-rear length of the first frame-side connecting piece 72a is set to be shorter than the front-to-rear length of the upper fixing member 13b. Furthermore, the vertical length of the second frame-side connecting piece 72b is set to be shorter than the vertical length between the upper horizontal frame member 13 and the first support-side combustion-suppressing covering member 50. Furthermore, the vertical length of the third frame-side connecting piece 72c is set to be shorter than the vertical length of the second frame-side connecting piece 72b.

The thicknesses of the first frame-side connecting piece 72a, the second frame-side connecting piece 72b, and the third frame-side connecting piece 72c are calculated using known structural calculations, etc., and are set to a thickness that can support the upper horizontal frame member 13 (note that the thickness of each connecting piece of the support-side connecting means main body 73 is approximately the same).

(Configuration - Fixing structure - Fixing structure of upper horizontal frame member - First feature - Connection part - Connection means main body - Support side connection means main body)
The support-side connecting means body 73 is another part of the basic structure of the connecting means body 71. This support-side connecting means body 73 is a steel plate-like body configured so that its cross section along the YZ plane is approximately U-shaped, and is formed over approximately the entire length of the opening 4 in the left-right direction.

Specifically, as shown in FIG. 2, the support side connection means main body 73 includes a first support side connection piece 73a arranged to abut the first support side combustion suppression covering material 50 (specifically, the first outer combustion suppression covering material 52), a second support side connection piece 73b connected to the end of the first support side connection piece 73a on the outside of the room, and a third support side connection piece 73c connected to the end of the first support side connection piece 73a on the inside of the room.

Furthermore, the specific sizes of the first support side connection piece 73a, the second support side connection piece 73b, and the third support side connection piece 73c are arbitrary, but in embodiment 1 they are set as follows:

That is, as shown in Figure 2, the length of the first support side connecting piece 73a in the front-to-rear direction is set to be shorter than the length of the upper fixing member 13b in the front-to-rear direction.

Furthermore, the vertical length of the second support side connecting piece 73b is set shorter than the vertical length of the second frame side connecting piece 72b so that when connecting the frame side connecting means main body 72 and the support side connecting means main body 73 from the projection direction (front-to-back direction in Figure 2), the second support side connecting piece 73b and the third frame side connecting piece 72c do not come into contact with each other, but the second frame side connecting piece 72b and the second support side connecting piece 73b can come into contact with each other.

In addition, the vertical length of the third support side connection piece 73c is set longer than the vertical length of the third frame side connection piece 72c so that the third frame side connection piece 72c and the third support side connection piece 73c can abut when connecting the frame side connection means main body 72 and the support side connection means main body 73 from the projection direction.

(Configuration - Fixing structure - Fixing structure of upper horizontal frame member - First feature - Connection part - Support side fixing member)
The support-side fixing member 74 is a member for fixing the connection means main body 71 to the wooden support member 3. This support-side fixing member 74 is formed using, for example, a known fixing member (e.g., a steel screw, nail, or bolt), and is inserted into the wooden support member 3 so as to penetrate the connection means main body 71 and the support-side combustion-suppressing covering material 40.

Specifically, as shown in Figure 2, multiple support-side fixing members 74 are provided at intervals in the front-to-back and left-to-right directions on the wooden support member 3. Each support-side fixing member 74 is inserted into the wooden support member 3 so as to penetrate the first support-side connecting piece 73a of the support-side connecting means main body 73, the first inner combustion-suppressing covering material 51, and the first outer combustion-suppressing covering material 52.

(Configuration - Fixing structure - Fixing structure of upper horizontal frame member - First feature - Connection part - Frame side fixing member)
The frame-side fixing member 75 is a member for fixing the frame-side connection means main body 72 to the upper horizontal frame member 13. This frame-side fixing member 75 is constructed using, for example, known fixing members (e.g., steel screws, nails, bolts, etc.), and is fixed to the upper horizontal frame member 13 via the frame-side connection means main body 72.

Specifically, as shown in Figure 2, multiple frame-side fixing members 75 are provided at intervals in the front-to-rear and left-to-right directions on the upper horizontal frame member 13. Each frame-side fixing member 75 is fixed to the upper fixing member 13b via the first frame-side connecting piece 72a of the frame-side connecting means main body 72.

(Configuration - Fixing structure - Fixing structure of upper horizontal frame member - First feature - Connection part - Connection side fixing member)
The connection-side fixing member 76 is a member for fixing either the frame-side connecting means body 72 or the support-side connecting means body 73 to the other of the frame-side connecting means body 72 or the support-side connecting means body 73. This connection-side fixing member 76 is formed using, for example, a known fixing member (one example is a steel screw, nail, or bolt), and is fixed to the other of the frame-side connecting means body 72 or the support-side connecting means body 73 via either the frame-side connecting means body 72 or the support-side connecting means body 73.

Specifically, as shown in FIG. 2, multiple connection-side fixing members 76 are provided at intervals in the left-right direction on each of the second support-side connecting piece 73b and the third frame-side connecting piece 72c. Some connection-side fixing members 76 are fixed to the second support-side connecting piece 73b via the second frame-side connecting piece 72b, while other connection-side fixing members 76 are fixed to the third frame-side connecting piece 72c via the third support-side connecting piece 73c.

This first feature prevents the wooden support member 3 from burning due to the flames of a fire that breaks out around the building fixture 1, and also prevents the upper horizontal frame member 13 from becoming detached from the wooden support member 3, thereby reducing damage to the wooden support member 3 caused by the fire. Furthermore, compared to when the connection portion 70 is not provided, it is easier to adjust the mounting position of the upper horizontal frame member 13 and the wooden support member 3 when installing the upper horizontal frame member 13, thereby improving the ease of installation of the upper horizontal frame member 13.

(Configuration - Fixed structure - Fixed structure of upper horizontal frame material - Second feature)
Next, the second feature of the fixing structure of the upper horizontal frame member 13 is that, as shown in FIG. 2, the fixing structure further includes a connection-side combustion-suppressing covering material 80 .

(Configuration - Fixing structure - Fixing structure of upper horizontal frame material - Second feature - Connection side fire retardant covering material)
The connection-side combustion suppression covering material 80 is a combustion suppression covering material for suppressing combustion of the connection portion 70. This connection-side combustion suppression covering material 80 is configured to function as a fire-resistant covering material, a fire-prevention covering material, or a non-combustible material, and is provided so as to cover at least one of the visible surfaces of the connection means main body 71. Specifically, as shown in FIG. 2 , it is provided on the outdoor side and the indoor side of the room relative to the connection means main body 71.

In the following, where necessary, of the connection-side combustion suppression covering materials 80, the connection-side combustion suppression covering material 80a located on the outdoor side of the room will be referred to as the "outdoor connection-side combustion suppression covering material 80a," and the connection-side combustion suppression covering material 80b located on the indoor side of the room will be referred to as the "indoor connection-side combustion suppression covering material 80b."

Furthermore, as shown in FIG. 2, the outdoor connection side combustion suppression covering material 80a and the indoor connection side combustion suppression covering material 80b each include a third inner combustion suppression covering material 81 and a third outer combustion suppression covering material 82.

(Configuration - Fixing structure - Fixing structure of upper horizontal frame material - Second feature - Connection side fire retardant covering material - Third inner fire retardant covering material)
The third inner combustion-suppressing covering material 81 is part of the basic structure of the connection-side combustion-suppressing covering material 80. This third inner combustion-suppressing covering material 81 has substantially the same structure as the second inner combustion-suppressing covering material 61, and is arranged so as to cover the visible outer surface of the connection means main body 71, as shown in FIG.

(Configuration - Fixing structure - Fixing structure of upper horizontal frame material - Second feature - Connection side fire retardant covering material - Third outer fire retardant covering material)
The third outer combustion suppression covering material 82 is another part of the basic structure of the connection-side combustion suppression covering material 80. This third outer combustion suppression covering material 82 has substantially the same configuration as the second outer combustion suppression covering material 62, and is provided outside the third inner combustion suppression covering material 81. Specifically, as shown in FIG. 2 , the third outer combustion suppression covering material 82 is disposed so as to substantially cover the entire outer surface of the third inner combustion suppression covering material 81.

(Configuration - Fixing structure - Fixing structure of upper horizontal frame material - Second feature - Connection side fire retardant covering material - Other configurations)
The specific configuration of the connection side combustion suppression covering material 80 is arbitrary, but in embodiment 1, first, the outdoor connection side combustion suppression covering material 80a and the indoor connection side combustion suppression covering material 80b are arranged so that the connection portion 70 is not exposed to the outside (i.e., multiple connection side combustion suppression covering materials 80 are arranged).

Specifically, as shown in Figure 2, for the outdoor connection side combustion suppression covering material 80a, one third inner combustion suppression covering material 81 (or multiple third inner combustion suppression covering materials 81) is arranged at a distance from the connection means main body 71 and is arranged so as to cover substantially the entire outer surface of the connection means main body 71 that is visible outside the room. Furthermore, one third outer combustion suppression covering material 82 (or multiple third outer combustion suppression covering materials 82) is arranged so as to cover substantially the entire outer surface of the one third inner combustion suppression covering material 81.

Furthermore, with regard to the indoor connection side combustion suppression covering material 80b, one third inner combustion suppression covering material 81 (or multiple third inner combustion suppression covering materials 81) is arranged at a distance from the connection means main body 71 and is arranged so as to cover substantially the entire visible surface of the outer surface of the connection means main body 71 on the indoor side of the room. Furthermore, one third outer combustion suppression covering material 82 (or multiple third outer combustion suppression covering materials 82) is arranged so as to cover substantially the entire outer surface of the one third inner combustion suppression covering material 81.

This prevents the connection part 70 from being exposed to the outside, allowing the design of the fixture 1 and its surroundings to be maintained.

In addition, the second support side combustion suppression coating material 60 and the connection side combustion suppression coating material 80 are formed integrally.

Specifically, as shown in FIG. 2, the second inner combustion suppression covering material 61 of the outdoor second support side combustion suppression covering material 60a and the third inner combustion suppression covering material 81 of the outdoor connection side combustion suppression covering material 80a are integrally formed, and the second outer combustion suppression covering material 62 of the outdoor second support side combustion suppression covering material 60a and the third outer combustion suppression covering material 82 of the outdoor connection side combustion suppression covering material 80a are integrally formed. Furthermore, the second inner combustion suppression covering material 61 of the indoor second support side combustion suppression covering material 60b and the third inner combustion suppression covering material 81 of the indoor connection side combustion suppression covering material 80b are integrally formed, and the second outer combustion suppression covering material 62 of the indoor second support side combustion suppression covering material 60b and the third outer combustion suppression covering material 82 of the indoor connection side combustion suppression covering material 80b are integrally formed.

This makes it easier to install the fixing structure compared to when the second support-side combustion suppression covering material 60 and the connection-side combustion suppression covering material 80 are formed separately, thereby improving the ease of installation of the fixing structure.

This second feature prevents the heat of the fire from being transferred to the connection means main body 71, further reducing damage to the wooden support member 3 caused by the fire.

(Regarding the function of the upper horizontal frame fixing structure)
Next, we will explain the operation of the fixing structure of the upper horizontal frame member 13 configured in this way. The operation of the fixing structure of the upper horizontal frame member 13 can be broadly divided into the operation when a fire breaks out on the outside of the room and the operation when a fire breaks out on the inside of the room, but since these operations are substantially the same, we will only explain the operation when a fire breaks out on the outside of the room below.

For example, if a fire breaks out outside the room when the door is fully closed, the wooden support member 3 will be exposed to the flames of the fire.

In this case, the support-side combustion-suppressing covering material 40 prevents the wooden support member 3 from burning. This prevents at least a portion of the wooden support member 3 from burning, preventing the fire from spreading from the outside to the inside of the room via the wooden support member 3.

In addition, the connection-side combustion-suppressing covering material 80 prevents the connection part 70 from being directly exposed to the flames of the fire, and prevents the heat of the fire from being conducted to the wooden support member 3 via the connection part 70. This prevents the strength of the wooden support member 3 from being reduced by the heat of the fire, and therefore prevents the wooden support member 3 from collapsing.

(Method of fixing the frame material)
Next, a method for fixing the frame material 15 will be described.

The method for fixing the frame material 15 is a method for fixing the frame material 15 to the wooden support member 3 (specifically, the wooden interior wall material), and includes a method for fixing the trailing edge vertical frame material 11, a method for fixing the leading edge vertical frame material 12, and a method for fixing the upper horizontal frame material 13.

The methods for fixing the trailing edge vertical frame member 11, the leading edge vertical frame member 12, and the upper horizontal frame member 13 are all substantially identical, so below we will only explain the method for fixing the upper horizontal frame member 13 (the same applies to the methods for fixing the trailing edge vertical frame member 11, the leading edge vertical frame member 12, and the upper horizontal frame member 13 in other embodiments).

(Frame material fixing method - Upper horizontal frame material fixing method)
The method for fixing the upper horizontal frame member 13 is a method for fixing the upper horizontal frame member 13 to the wooden support member 3, and includes a first covering step, a first mounting step, a second mounting step, a connecting step, and a second covering step.

(Method for fixing frame material - Method for fixing upper horizontal frame material - First covering process)
First, the first coating step will be described.

The first covering process is a process of covering the wooden support member 3 with the first support-side combustion-suppressing covering material 50.

Specifically, at the site where the fitting 1 is to be installed (hereinafter referred to as the "installation site"), the first support-side fire-suppressing covering material 50 is placed so that the entire visible surface of the wooden support member 3 on the connection portion 70 side is covered by the first support-side fire-suppressing covering material 50, and then the first support-side fire-suppressing covering material 50 is fixed to the wooden support member 3 using fasteners and/or adhesives, etc.

(Method of fixing the frame material - Method of fixing the upper horizontal frame material - First installation process)
Next, the first mounting step will be described.

The first attachment process is a process for attaching the support-side connection means main body 73 to the wooden support member 3 after the first covering process.

Specifically, at the installation site, the support-side connecting means main body 73 is positioned so that the first support-side connecting piece 73a of the support-side connecting means main body 73 abuts the first support-side combustion-suppressing covering material 50, and then multiple support-side fixing members 74 are inserted into the wooden support member 3 so as to penetrate the first support-side connecting piece 73a, the first inner combustion-suppressing covering material 51, and the first outer combustion-suppressing covering material 52.

(Method of fixing the frame material - Method of fixing the upper horizontal frame material - Second installation process)
Next, the second mounting step will be described.

The second attachment process is a process for attaching the frame-side connection means main body 72 to the upper horizontal frame member 13 before the first covering process (or after the first covering process or the first attachment process).

Specifically, at the factory or installation site, the frame-side connection means main body 72 is installed so that the first frame-side connection piece 72a of the frame-side connection means main body 72 abuts the upper fixing member 13b of the upper horizontal frame member 13, and then multiple frame-side fixing members 75 are fixed to the upper fixing member 13b via the first frame-side connection piece 72a.

(Method of fixing the frame material - Method of fixing the upper horizontal frame material - Connection process)
Next, the connection process will be described.

The connection process is a process for connecting the frame-side connection means main body 72 and the support-side connection means main body 73 after the first and second installation processes.

Specifically, at the installation site, the upper horizontal frame member 13 is moved from front to rear while the second frame-side connecting piece 72b of the frame-side connecting means main body 72 attached to the upper fixing member 13b is brought into contact with the second support-side connecting piece 73b of the support-side connecting means main body 73 attached to the wooden support member 3, and the third frame-side connecting piece 72c of the frame-side connecting means main body 72 is brought into contact with the third support-side connecting piece 73c of the support-side connecting means main body 73. After that, the multiple connecting-side fixing members 76 are fixed to the second support-side connecting piece 73b via the second frame-side connecting piece 72b, and to the third frame-side connecting piece 72c via the third support-side connecting piece 73c.

(Method of fixing the frame material - Method of fixing the upper horizontal frame material - Second covering process)
Next, the second covering step will be described.

The second covering process is a process that follows the connection process and involves covering the wooden support member 3 and connection portion 70 with the second support-side combustion-suppressing covering material 60 and the connection-side combustion-suppressing covering material 80.

Specifically, at the installation site, the outdoor second support side combustion suppression covering material 60a and the outdoor connection side combustion suppression covering material 80a, which are integrally formed, are positioned so that the entire visible surface of the wooden support member 3 on the outdoor side of the room and the entire visible surface of the connection part 70 on the outdoor side of the room are substantially covered, and then the outdoor second support side combustion suppression covering material 60a is fixed to the wooden support member 3 using fixing devices and/or adhesives, etc. Furthermore, after the indoor second support side combustion suppression covering material 60b and the indoor connection side combustion suppression covering material 80b are positioned so that the entire visible surface of the wooden support member 3 on the indoor side of the room and the entire visible surface of the connection portion 70 on the indoor side of the room are substantially covered by the integrally formed indoor second support side combustion suppression covering material 60b and the indoor connection side combustion suppression covering material 80b, the indoor second support side combustion suppression covering material 60b is fixed to the wooden support member 3 with fasteners and/or adhesives, etc.

This method of fixing the upper horizontal frame member 13 makes it possible to easily and quickly fix the upper horizontal frame member 13 to the wooden support member 3.

(Effects of the First Embodiment)
Thus, according to the first embodiment, the wooden support member 3 includes a support-side combustion-suppressing covering material 40 that is provided to cover at least a portion of the outer surface of the wooden support member 3, and a connecting portion 70 that is provided between the frame member 15 and the support-side combustion-suppressing covering material 40. The connecting portion 70 includes a support-side fixing member 74 that fixes the connecting means main body 71 to the wooden support member 3 and that is inserted into the wooden support member 3 so as to penetrate the connecting means main body 71 and the support-side combustion-suppressing covering material 40. Therefore, in the event of a fire occurring near the building fixture 1, the wooden support member 3 is prevented from burning due to the flames of the fire and the frame member 15 is prevented from becoming detached from the wooden support member 3, thereby reducing damage to the wooden support member 3 due to the fire. Furthermore, since the mounting position of the frame member 15 and the wooden support member 3 can be more easily adjusted during mounting than in a case where the connecting portion 70 is not provided, the mountability of the frame member 15 is improved.

In addition, a connection-side combustion-suppressing covering material 80 is provided to cover at least one of the visible surfaces of the connection means body 71, which prevents the heat of the fire from being transferred to the connection means body 71, further reducing damage to the wooden support member 3 caused by the fire.

In addition, multiple connection-side combustion-suppressing covering materials 80 are placed to prevent the connection parts 70 from being exposed to the outside, preventing the connection parts 70 from being exposed to the outside and maintaining the design of the fitting 1 and its surroundings.

In addition, because the second support-side combustion suppression covering material 60 and the connection-side combustion suppression covering material 80 are formed as a single unit, the installation of the fixing structure is easier than when the second support-side combustion suppression covering material 60 and the connection-side combustion suppression covering material 80 are formed separately, thereby improving the installability of the fixing structure.

Second Embodiment
Next, a description will be given of the fastening structure of the door frame material according to embodiment 2. In this embodiment 2, the support-side combustion-suppressing covering material and the connection-side combustion-suppressing covering material are formed separately. However, the configuration according to embodiment 2 is the same as the configuration according to embodiment 1 except where otherwise specified, and the same components will be omitted from description by using the same names or symbols as those used in embodiment 1 as necessary.

(composition)
First, we will explain the configuration of the fitting 100 according to embodiment 2. The fitting 100 according to embodiment 2 is configured substantially identically to the fitting 1 according to embodiment 1. However, the details of the configuration of the fixing structure of the upper horizontal frame member 13 have been improved as described below.

(Configuration - Upper horizontal frame fixing structure)
Next, the fixing structure of the upper horizontal frame member 13 will be described.

The features of the fixing structure of the upper horizontal frame member 13 in embodiment 2 are as follows:

(Configuration - Upper horizontal frame fixing structure - First feature)
First, regarding the first feature of the fixing structure of the upper horizontal frame member 13, as shown in Figure 3, the fixing structure includes a support-side combustion-suppressing covering material 40, a connection portion 70, and a connection-side combustion-suppressing covering material 80.

(Configuration - Upper horizontal frame fixing structure - First feature - Support side fire retardant covering material)
The support-side combustion-suppressing coating material 40 according to the second embodiment is configured substantially identically to the support-side combustion-suppressing coating material 40 according to the first embodiment. However, the details of the configuration of the first support-side combustion-suppressing coating material 50 and the second support-side combustion-suppressing coating material 60 have been improved as described below.

Specifically, as shown in FIG. 3, the first support-side combustion-suppressing coating material 50 and the second support-side combustion-suppressing coating material 60 are formed as a single unit. However, this is not limited to this, and for example, the first support-side combustion-suppressing coating material 50 and the second support-side combustion-suppressing coating material 60 may be formed as separate units.

(Configuration - Upper horizontal frame fixing structure - First feature - Connection part)
The connecting portion 70 according to the second embodiment has substantially the same configuration as the connecting portion 70 according to the first embodiment.

(Configuration - Upper horizontal frame fixing structure - First feature - Connection side fire retardant covering material)
As shown in Fig. 3, the connection-side combustion suppression covering material 80 according to the second embodiment is substantially similar to the connection-side combustion suppression covering material 80 according to the first embodiment, and includes an outdoor connection-side combustion suppression covering material 80a and an indoor connection-side combustion suppression covering material 80b, and these outdoor connection-side combustion suppression covering material 80a and indoor connection-side combustion suppression covering material 80b are arranged at a distance from the connection means main body 71. However, this is not limiting, and for example, as shown in Fig. 4, the outdoor connection-side combustion suppression covering material 80a and the indoor connection-side combustion suppression covering material 80b may each be arranged so as to abut the connection means main body 71.

Returning to Figure 3, the specific configuration of the connection-side combustion suppression coating material 80 is optional, but in embodiment 2, the support-side combustion suppression coating material 40 and the connection-side combustion suppression coating material 80 are formed separately.

Specifically, as shown in Figure 3 (or Figure 4), the first inner combustion suppression coating material 51 and the second inner combustion suppression coating material 61 of the support-side combustion suppression coating material 40 and the third inner combustion suppression coating material 81 of the connection-side combustion suppression coating material 80 are each formed separately, and the first outer combustion suppression coating material 52 and the second outer combustion suppression coating material 62 of the support-side combustion suppression coating material 40 and the third outer combustion suppression coating material 82 of the connection-side combustion suppression coating material 80 are each formed separately.

This allows the support-side combustion suppression coating material 40 and the connection-side combustion suppression coating material 80 to be installed in a configuration that suits the situation, making it possible to install the support-side combustion suppression coating material 40 and the connection-side combustion suppression coating material 80 according to needs.

In this case, the method for installing the connection-side fire-suppressing covering material 80 is arbitrary. However, in embodiment 2, as shown in Figure 3, the connection-side fire-suppressing covering material 80 is positioned via alignment portions 110 (e.g., protruding pieces or angle bars formed on the upper horizontal frame member 13) provided on the upper horizontal frame member 13 and the first support-side fire-suppressing covering material 50, and then fixed to the wooden support member 3, the first support-side fire-suppressing covering material 50, or the upper horizontal frame member 13 using fasteners and/or adhesives, etc. This makes it easy to align the connection-side fire-suppressing covering material 80, improving the ease of installation of the connection-side fire-suppressing covering material 80.

This first feature, similar to the fixing structure of the upper horizontal frame member 13 in embodiment 1, prevents the flames of a fire from burning the wooden support member 3 (specifically, the wooden interior wall member whose length in the front-to-back direction is shorter than the frame body 10, as shown in Figure 3) in the event of a fire occurring around the building fixture 100. It also prevents the upper horizontal frame member 13 from becoming detached from the wooden support member 3, thereby reducing damage to the wooden support member 3 caused by the fire.

(Configuration - Upper horizontal frame fixing structure - Second feature)
Next, the second feature of the fixing structure of the upper horizontal frame member 13 is that the second support side combustion suppression covering material 60 and the connection side combustion suppression covering material 80 are arranged so as to be approximately flush with each other.

Specifically, as shown in Figure 3, the second inner combustion suppression covering material 61 of the outdoor second support side combustion suppression covering material 60a and the third inner combustion suppression covering material 81 of the outdoor connection side combustion suppression covering material 80a are arranged so that they are substantially flush with each other, and the second outer combustion suppression covering material 62 of the outdoor second support side combustion suppression covering material 60a and the third outer combustion suppression covering material 82 of the outdoor connection side combustion suppression covering material 80a are arranged so that they are substantially flush with each other.

In addition, the second inner combustion suppression covering material 61 of the indoor second support side combustion suppression covering material 60b and the third inner combustion suppression covering material 81 of the indoor connection side combustion suppression covering material 80b are arranged so that they are approximately flush with each other, and the second outer combustion suppression covering material 62 of the indoor second support side combustion suppression covering material 60b and the third outer combustion suppression covering material 82 of the indoor connection side combustion suppression covering material 80b are arranged so that they are approximately flush with each other.

This second feature ensures a sense of unity between the design of the second support-side combustion suppression covering material 60 and the design of the connection-side combustion suppression covering material 80, compared to when the second support-side combustion suppression covering material 60 and the connection-side combustion suppression covering material 80 are not flush, as shown in Figure 4, making it easier to maintain the design of the fitting 100 and its surroundings.

(How to fix the upper horizontal frame material)
Next, a method for fixing the upper horizontal frame member 13 will be described.

The method for fixing the upper horizontal frame member 13 in embodiment 2 includes a first covering step, a first mounting step, a second mounting step, a connecting step, and a second covering step.

(Method for fixing upper horizontal frame material - first covering process)
The first covering step according to the second embodiment is a step of covering the wooden support member 3 with the first support-side combustion-suppressing covering material 50 and the second support-side combustion-suppressing covering material 60 .

Specifically, at the installation site, the first support-side fire suppression covering material 50 and the second support-side fire suppression covering material 60 (specifically, the outdoor second support-side fire suppression covering material 60a and the indoor second support-side fire suppression covering material 60b) are placed so that the entire visible surface of the wooden support member 3 on the connection portion 70 side and the entire visible surfaces on the outdoor and indoor sides of the room are substantially covered by the first support-side fire suppression covering material 50 and the second support-side fire suppression covering material 60. The first support-side fire suppression covering material 50 and the second support-side fire suppression covering material 60 are then fixed to the wooden support member 3 with fasteners and/or adhesives, etc.

(Method for fixing the upper horizontal frame material - first installation process)
In the first attachment step according to the second embodiment, substantially similar to the first attachment step according to the first embodiment, the support-side connecting means body 73 is attached to the wooden support member 3 after the first covering step.

(Method for fixing the upper horizontal frame material - second installation process)
In the second installation step of embodiment 2, the frame side connection means main body 72 is attached to the upper horizontal frame material 13 before the first covering step (or after the first covering step or the first installation step), in a manner similar to the second installation step of embodiment 1.

(Upper horizontal frame fixing method - connection process)
In the connection process of embodiment 2, the frame side connection means main body 72 and the support side connection means main body 73 are connected after the first mounting process and the second mounting process, in a manner similar to the connection process of embodiment 1.

(Method for fixing upper horizontal frame material - second covering process)
The second covering step according to the second embodiment is a step of covering the connection portion 70 with the connection-side combustion-suppressing covering material 80 after the connection step.

Specifically, at the installation site, the outdoor connection side fire suppression covering material 80a is positioned via the alignment unit 110 so that the entire visible surface of the connection unit 70 on the outdoor side of the room is substantially covered by the outdoor connection side fire suppression covering material 80a, and then the outdoor connection side fire suppression covering material 80a is fixed to the wooden support member 3, the first support side fire suppression covering material 50, or the upper horizontal frame member 13 using fasteners and/or adhesives, etc. Furthermore, the indoor connection side fire suppression covering material 80b is positioned via the alignment unit 110 so that the entire visible surface of the connection unit 70 on the indoor side of the room is substantially covered by the indoor connection side fire suppression covering material 80b, and then the indoor connection side fire suppression covering material 80b is fixed to the wooden support member 3, the first support side fire suppression covering material 50, or the upper horizontal frame member 13 using fasteners and/or adhesives, etc.

This method of fixing the upper horizontal frame member 13 makes it possible to easily and quickly fix the upper horizontal frame member 13 to the wooden support member 3, similar to the method of fixing the upper horizontal frame member 13 in embodiment 1.

(Effects of the Second Embodiment)
According to embodiment 2, the support side combustion suppression coating material 40 and the connection side combustion suppression coating material 80 are formed separately, so that the support side combustion suppression coating material 40 and the connection side combustion suppression coating material 80 can be installed in a configuration that suits the situation, and it is possible to install the support side combustion suppression coating material 40 and the connection side combustion suppression coating material 80 according to needs.

In addition, because the second support-side combustion suppression covering material 60 and the connection-side combustion suppression covering material 80 are made approximately flush, a sense of unity can be achieved between the designs of the second support-side combustion suppression covering material 60 and the connection-side combustion suppression covering material 80, compared to when the second support-side combustion suppression covering material 60 and the connection-side combustion suppression covering material 80 are not flush, making it easier to maintain the design of the fitting 100 and its surroundings.

Third Embodiment
Next, a description will be given of a fixing structure for a fitting frame material according to embodiment 3. This embodiment 3 is equipped with a fire-retardant covering material for closure, which will be described later. However, the configuration according to embodiment 3 is the same as the configuration according to embodiment 1, except where otherwise specifically described, and the same components will be omitted from description by using the same names or symbols as those used in embodiment 1 as necessary.

(composition)
First, we will explain the configuration of the fitting 200 according to embodiment 3. The fitting 200 according to embodiment 3 is configured substantially identically to the fitting 1 according to embodiment 1. However, the details of the configuration of the fixing structure of the upper horizontal frame member 13 have been improved as described below.

(Configuration - Upper horizontal frame fixing structure)
Next, the fixing structure of the upper horizontal frame member 13 will be described.

Regarding the characteristics of the fixing structure of the upper horizontal frame member 13 in embodiment 3, as shown in Figure 5, the fixing structure includes a support-side combustion-suppressing covering material 40, a connection portion 70, a connection-side combustion-suppressing covering material 80, and a closing combustion-suppressing covering material 210.

(Configuration - Upper horizontal frame fixing structure - Support side fire retardant covering material)
The support-side combustion-suppressing covering material 40 according to the third embodiment is configured substantially the same as the support-side combustion-suppressing covering material 40 according to the first embodiment.

(Configuration - Upper horizontal frame fixing structure - Connection part)
The connecting portion 70 according to the third embodiment has substantially the same configuration as the connecting portion 70 according to the first embodiment.

(Configuration - Upper horizontal frame fixing structure - Connection side fire retardant covering material)
The connection-side combustion-suppressing covering material 80 according to the third embodiment has substantially the same configuration as the connection-side combustion-suppressing covering material 80 according to the first embodiment.

(Configuration - Upper horizontal frame fixing structure - Closure fire retardant covering material)
The closing combustion suppression covering material 210 is a combustion suppression covering material that suppresses combustion at the connection portion 70 by closing the gap between the connection side combustion suppression covering material 80 and the upper horizontal frame material 13.

The reason for providing the closing fire-retardant covering material 210 is as follows. Specifically, as shown in Figure 5, when the front-to-rear length of the wooden support member 3 is longer than the front-to-rear length of the frame body 10, a gap is likely to form between the connection-side fire-retardant covering material 80 and the upper horizontal frame member 13. This means that in the event of a fire breaking out around the fitting 200, the connection portion 70 may be exposed to flames of the fire that flow in through the gap. This is to avoid this problem.

This closing fire suppression covering material 210 is configured to function as a fire-resistant covering material, a fire-preventing covering material, or a non-combustible material, and is provided to cover the gap between the connection-side fire suppression covering material 80 and the upper horizontal frame member 13. Specifically, as shown in Figure 5, it is provided to cover the gap between the indoor connection-side fire suppression covering material 80b and the upper horizontal frame member 13. However, this is not limited to this, and multiple covering materials may be provided to cover the gap between the outdoor connection-side fire suppression covering material 80a and the upper horizontal frame member 13, and the gap between the indoor connection-side fire suppression covering material 80b and the upper horizontal frame member 13, as shown in Figures 6 and 7 (note that the support-side fire suppression covering material 40 in Figure 7 and the connection-side fire suppression covering material 80 in Figure 7 are formed separately).

Returning to Figure 5, the closing combustion suppression coating material 210 also includes a fourth inner combustion suppression coating material 211 and a fourth outer combustion suppression coating material 212.

(Configuration - Upper horizontal frame fixing structure - Closure fire retardant covering material - Fourth inner fire retardant covering material)
The fourth inner combustion suppression covering material 211 is part of the basic structure of the closing combustion suppression covering material 210. This fourth inner combustion suppression covering material 211 is constructed substantially identically to the third inner combustion suppression covering material 81, and as shown in Figure 5, is supported by a spacer 220 attached to the first support-side combustion suppression covering material 50 or the wooden support member 3, and is positioned so as to protrude toward the outside of the room from the tip of the third inner combustion suppression covering material 81 of the indoor connection-side combustion suppression covering material 80b, and is fixed to the spacer 220 or the third inner combustion suppression covering material 81 with fasteners and/or adhesives, etc.

(Configuration - Upper horizontal frame fixing structure - Closure fire retardant covering material - Fourth outer fire retardant covering material)
The fourth outer combustion suppression covering material 212 is another part of the basic structure of the closing combustion suppression covering material 210. This fourth outer combustion suppression covering material 212 is configured substantially identically to the third outer combustion suppression covering material 82 and is provided outside the fourth inner combustion suppression covering material 211. Specifically, as shown in Figure 5, the fourth outer combustion suppression covering material 212 is arranged so as to cover substantially the entire outer surface of the fourth inner combustion suppression covering material 211 and is fixed to the fourth inner combustion suppression covering material 211, the third outer combustion suppression covering material 82 of the indoor connection side combustion suppression covering material 80b, or the upper horizontal frame member 13 by fasteners and/or adhesives, etc.

This feature prevents the inflow of flames from a fire that occurs near the fixture 200 through the gap between the connection-side fire-retardant covering material 80 and the upper horizontal frame member 13, further reducing damage to the wooden support member 3 caused by the fire.

(How to fix the upper horizontal frame material)
Next, a method for fixing the upper horizontal frame member 13 will be described.

The method for fixing the upper horizontal frame member 13 in embodiment 3 includes a first covering step, a first mounting step, a second mounting step, a connecting step, a second covering step, and a third covering step.

(Method for fixing upper horizontal frame material - first covering process)
In the first covering step according to the third embodiment, the wooden support member 3 is covered with the first support-side combustion-suppressing covering material 50 in substantially the same manner as in the first covering step according to the first embodiment.

(Method for fixing the upper horizontal frame material - first installation process)
In the first attachment step according to the third embodiment, substantially similar to the first attachment step according to the first embodiment, the support-side connecting means body 73 is attached to the wooden support member 3 after the first covering step.

(Method for fixing the upper horizontal frame material - second installation process)
In the second installation step of embodiment 3, the frame side connection means main body 72 is attached to the upper horizontal frame material 13 before the first covering step (or after the first covering step or the first installation step), in a manner similar to the second installation step of embodiment 1.

(Upper horizontal frame fixing method - connection process)
In the connection process of embodiment 3, the frame side connection means main body 72 and the support side connection means main body 73 are connected after the first mounting process and the second mounting process, in a manner similar to the connection process of embodiment 1.

(Method for fixing upper horizontal frame material - second covering process)
The second covering process of embodiment 3 is substantially similar to the second covering process of embodiment 1, in that after the connection process, the wooden support member 3 and the connection portion 70 are covered with the second support side combustion suppression covering material 60 and the connection side combustion suppression covering material 80.

(Method for fixing upper horizontal frame material - third covering process)
The third covering process according to the third embodiment is a process of closing the gap between the connection side combustion suppression covering material 80 and the upper horizontal frame material 13 with the closing combustion suppression covering material 210 .

Specifically, at the installation site, the spacer 220 is attached to the first support side fire retardant covering material 50 or the wooden support member 3 using fasteners or adhesives, etc., and then the closing fire retardant covering material 210 is fixed to the spacer 220, the indoor connection side fire retardant covering material 80b, or the upper horizontal frame member 13 using fasteners and/or adhesives, etc.

This method of fixing the upper horizontal frame member 13 makes it possible to easily and quickly fix the upper horizontal frame member 13 to the wooden support member 3.

(Effects of the Third Embodiment)
Thus, according to embodiment 3, when a fire breaks out around the building fixture 200, it is possible to prevent the flames of the fire from flowing in through the gap between the connection side combustion suppression covering material 80 and the upper horizontal frame material 13, thereby further reducing damage to the wooden support member 3 caused by the fire.

[III] Modifications to the Embodiments The embodiments of the present invention have been described above, but the specific configurations and means of the present invention can be modified and improved as desired within the scope of the technical ideas of each invention as set forth in the claims. Such modifications will be described below.

(About the problem to be solved and the effects of the invention)
First, the problems that the invention aims to solve and the effects of the invention are not limited to those described above, and the present invention may solve problems that are not described above or achieve effects that are not described above, or may solve only some of the problems that are described or achieve only some of the effects that are described.

(shape, numbers, structure, time series)
The components illustrated in the embodiments and drawings may be modified and improved as desired within the scope of the technical concept of the present invention in terms of shape, numerical value, or the structure or chronological relationship of multiple components.

(Regarding wooden support members)
In the above first to third embodiments, the wooden support member 3 has been described as a wooden interior wall material, but this is not limiting and the wooden support member 3 may be, for example, a wooden beam (or a wooden pillar) as shown in Fig. 8. In this case, the support-side combustion-suppressing covering material 40 (specifically, the first support-side combustion-suppressing covering material 50 and the second support-side combustion-suppressing covering material 60) may be arranged so that the entire outer surface of the wooden beam (or the wooden pillar) is covered by the support-side combustion-suppressing covering material 40.

(Regarding fixed structure)
In the above embodiments 1 to 3, it has been explained that the fixing structure includes a fixing structure for the trailing edge vertical frame member 11, a fixing structure for the leading edge vertical frame member 12, and a fixing structure for the upper horizontal frame member 13, but this is not limited to this, and for example, it may include only one or two of the fixing structure for the trailing edge vertical frame member 11, the fixing structure for the leading edge vertical frame member 12, or the fixing structure for the upper horizontal frame member 13.

Furthermore, in the above embodiments 1 to 3, the fixing structure of the upper horizontal frame member 13 was described as including an outdoor connection side combustion suppression covering material 80a and an indoor connection side combustion suppression covering material 80b, but this is not limited thereto. For example, at least one of the outdoor connection side combustion suppression covering material 80a and the indoor connection side combustion suppression covering material 80b may be omitted.

Furthermore, in the above-mentioned third embodiment, the fixing structure of the upper horizontal frame member 13 was described as including the closing combustion suppression covering material 210 and the spacer 220, but this is not limited thereto, and for example, the closing combustion suppression covering material 210 and the spacer 220 may be omitted.

In addition, in the above-mentioned first embodiment, the fixing structure of the upper horizontal frame member 13 was described as including the support-side fire-suppressing covering material 40, the connection portion 70, and the connection-side fire-suppressing covering material 80. However, this is not limited to this. For example, in addition to these, it may also include a suppression means 300 for suppressing the heat of a fire from being transmitted from the upper horizontal frame member 13 to the wooden support member 3 via the connection portion 70 in the event of a fire occurring around the building fixture 200 (note that the same applies to the fixing structure of the upper horizontal frame member 13 in the above-mentioned second and third embodiments).

As an example, as shown in FIG. 9, suppression means 300 made of a heat-absorbing material (e.g., gypsum, aluminum hydroxide, sodium silicate, alum, mica, etc.) may be provided inside the upper horizontal frame member 13 (or between the upper horizontal frame member 13 (or the first support-side fire-suppressing covering material 50) and the connection part 70, between the upper horizontal frame member 13 and the first support-side fire-suppressing covering material 50, or inside the connection part 70), thereby suppressing the transfer of heat from the fire from the upper horizontal frame member 13 to the wooden support member 3 via the connection part 70.

Also, as shown in FIG. 10, suppression means 300 made of an insulating material (e.g., calcium silicate board, gypsum board, etc.) may be provided between the upper horizontal frame member 13 (or the first support-side combustion-suppressing covering material 50) and the connection portion 70 (or between the upper horizontal frame member 13 and the first support-side combustion-suppressing covering material 50, inside the upper horizontal frame member 13, or inside the connection portion 70), thereby suppressing the heat of the fire from being transmitted from the upper horizontal frame member 13 to the wooden support member 3 via the connection portion 70.

Furthermore, the restraining means 300 in Figure 9 and the restraining means 300 in Figure 10 may be installed in combination inside the upper horizontal frame member 13 and between the upper horizontal frame member 13 and the connection portion 70, etc.

(Various types of fire retardant coating materials)
In the above-described first to third embodiments, the various types of combustion suppression covering materials (specifically, the first support-side combustion suppression covering material 50, the second support-side combustion suppression covering material 60, the connection-side combustion suppression covering material 80, and the closing combustion suppression covering material 210) are described as including two stacked combustion suppression covering materials (specifically, an inner combustion suppression covering material and an outer combustion suppression covering material). However, this is not limited to this. For example, only one combustion suppression covering material may be included. Alternatively, three or more stacked combustion suppression covering materials may be included, all or part of which are made of the same material (or all different materials).

In addition, in the above embodiments 1 to 3, the various fire-retardant covering materials are described as being made of materials that correspond to the performance of the fire-resistant structure. However, this is not a limitation, and the materials may be made of materials that correspond to the performance of a quasi-fire-resistant structure, for example. In this case, the inner fire-retardant covering material of the various fire-retardant covering materials may be made of gypsum board or the like to function as a fire-stopping material, and the outer fire-retardant covering material of the various fire-retardant covering materials may be made of fire-retardant plywood or the like to function as a substitute material.

Furthermore, in the above-mentioned embodiments 1 to 3, the first support-side combustion suppression covering material 50 and the second support-side combustion suppression covering material 60 are each described as being made of a material that corresponds to the performance of the fire-resistant structure. However, this is not limited to this, and they may be made of a material that corresponds to the performance of a quasi-fire-resistant structure, for example. In this case, the first support-side combustion suppression covering material 50 (specifically, the first inner combustion suppression covering material 51 and the first outer combustion suppression covering material 52) may be made of a non-combustible material, and the second support-side combustion suppression covering material 60 (specifically, the second inner combustion suppression covering material 61 and the second outer combustion suppression covering material 62) may be made of a fire-resistant material.

Furthermore, in the above-mentioned first and second embodiments, it was explained that the outdoor connection side combustion suppression covering material 80a and the indoor connection side combustion suppression covering material 80b are arranged so that the connection portion 70 is not exposed to the outside. However, this is not limited to this, and the outdoor connection side combustion suppression covering material 80a and the indoor connection side combustion suppression covering material 80b may be arranged so that a portion of the connection portion 70 is exposed to the outside.

(About the connection part)
In the above-mentioned first to third embodiments, the connecting portion 70 has been described as including the frame-side fixing member 75 and the connection-side fixing member 76, but this is not limited thereto. For example, the frame-side fixing member 75 and the connection-side fixing member 76 may be omitted, and the frame-side connecting means main body 72 and the upper horizontal frame member 13 may be connected by welding, and the frame-side connecting means main body 72 and the support-side connecting means main body 73 may be connected by welding.

In addition, in the above embodiments 1 to 3, the connection means body 71 is described as including the frame-side connection means body 72, but this is not limited to this. For example, as shown in FIG. 11, the frame-side connection means body 72 may be omitted. The first connection piece 311 provided on the upper horizontal frame member 13 may be connected to the second support-side connection piece 73b of the support-side connection means body 73 via the connection-side fixing member 76, and the second connection piece 312 provided on the upper horizontal frame member 13 may be connected to the third support-side connection piece 73c of the support-side connection means body 73 via the connection-side fixing member 76. In this case, the second attachment step may be omitted in the method for fixing the upper horizontal frame member 13.

(Additional Note)
The fixing structure for building fixture frame material in Appendix 1 is a fixing structure for fixing a frame material that constitutes the frame of a building fixture to a wooden support member among the members that constitute the building frame, and comprises a support-side fire-retardant covering material that is a fire-retardant covering material that is arranged to cover at least a portion of the outer surface of the support member and is a fire-retardant covering material for suppressing combustion of the support member, and a connecting means that is arranged between the frame material and the support-side fire-retardant covering material and is for connecting the frame material and the support member, and the connecting means comprises a connecting means main body and a support-side fixing member that is a support-side fixing member for fixing the connecting means main body to the support member and is inserted into the support member so as to penetrate the connecting means main body and the support-side fire-retardant covering material.

The fixing structure for a building frame material in Appendix 2 is the fixing structure for a building frame material in Appendix 1, and is equipped with a connection-side fire-retardant covering material that is provided to cover at least one of the visible surfaces of the connection means body and that is a fire-retardant covering material for suppressing combustion of the connection means.

The fixture frame fixing structure of Appendix 3 is the fixture frame fixing structure described in Appendix 2, in which multiple connection-side fire-retardant covering materials are arranged to prevent the connection means from being exposed to the outside.

The fixing structure for the fitting frame material in Appendix 4 is the fixing structure for the fitting frame material described in Appendix 2 or 3, wherein the support-side combustion-suppressing covering material comprises a first support-side combustion-suppressing covering material located on the connection means side, and a second support-side combustion-suppressing covering material formed separately from the first support-side combustion-suppressing covering material and located on the visible surface side of the support member, and the second support-side combustion-suppressing covering material and the connection-side combustion-suppressing covering material are integrally formed.

The fixing structure for the fitting frame material in Appendix 5 is the fixing structure for the fitting frame material in Appendix 2 or 3, in which the support-side fire-retardant covering material and the connection-side fire-retardant covering material are formed separately.

The fixing structure for the fitting frame material in Appendix 6 is the fixing structure for the fitting frame material described in Appendix 5, wherein the support-side fire-retardant covering material comprises a first support-side fire-retardant covering material located on the connection means side and a second support-side fire-retardant covering material located on the visible surface side of the support member, and the second support-side fire-retardant covering material and the connection-side fire-retardant covering material are approximately flush with each other.

(Effect of supplementary notes)
The fastening structure for a building frame described in Appendix 1 includes a support-side fire-suppressing covering that covers at least a portion of the outer surface of a wooden support member, and a connecting means that is provided between the frame member and the support-side fire-suppressing covering. The connecting means includes a support-side fixing member that fixes the connecting means main body to the wooden support member and that is inserted into the wooden support member so as to penetrate the connecting means main body and the support-side fire-suppressing covering. This prevents the wooden support member from being burned by the flames of a fire in the event of a fire near the building frame, and prevents the frame member from being detached from the wooden support member, thereby reducing damage to the wooden support member due to the fire. Furthermore, the mounting position of the frame member and the wooden support member can be easily adjusted during mounting compared to a case where the connecting means is not provided, thereby improving the mountability of the frame member.

The fixture frame fixing structure described in Appendix 2 includes a connection-side fire-retardant covering material that covers at least one of the visible surfaces of the connection means body, thereby preventing the heat of the fire from being transferred to the connection means body and further reducing damage to the wooden support member caused by the fire.

The fixture frame fixing structure described in Appendix 3 uses multiple connection-side fire-retardant covering materials to prevent the connection means from being exposed to the outside, preventing the connection means from being exposed to the outside and maintaining the aesthetic appeal of the fixture and its surroundings.

In the fixing structure for the fixture frame material described in Appendix 4, the second support-side combustion-suppressing covering material and the connection-side combustion-suppressing covering material are formed as a single unit. This makes installation of the fixing structure easier than when the second support-side combustion-suppressing covering material and the connection-side combustion-suppressing covering material are formed separately, thereby improving the ease of installation of the fixing structure.

The fixture frame fixing structure described in Appendix 5 allows the support-side fire retardant covering material and the connection-side fire retardant covering material to be formed separately, so the support-side fire retardant covering material and the connection-side fire retardant covering material can be installed in a configuration suited to the situation, making it possible to install the support-side fire retardant covering material and the connection-side fire retardant covering material according to needs.

The fixture frame fixing structure described in Appendix 6 makes the second support-side combustion retardant covering material and the connection-side combustion retardant covering material approximately flush. This ensures a sense of unity between the designs of the second support-side combustion retardant covering material and the connection-side combustion retardant covering material, making it easier to maintain the design of the fixture and its surroundings, compared to when the second support-side combustion retardant covering material and the connection-side combustion retardant covering material are not flush.

DESCRIPTION OF SYMBOLS 1 Door fitting 2 Frame 3 Wooden support member 4 Opening 10 Frame body 11 Door trailing end side vertical frame member 11a Vertical frame member main body 11b Vertical side recess 12 Door leading end side vertical frame member 13 Upper horizontal frame member 13a Upper horizontal frame member main body 13b Upper fixing member 13c Upper side recess 14 Shoe-slung horizontal frame member 14a Shoe-slung horizontal frame member main body 15 Frame member 16 Floor member 20 Opening and closing body 21 Outdoor side surface member 22 Handle portion 23 Locking device 30 Hinge portion 40 Support side fire retardant covering material 50 First support side fire retardant covering material 51 First inner fire retardant covering material 52 First outer fire retardant covering material 60 Second support side fire retardant covering material 60a Outdoor second support side fire retardant covering material 60b Indoor second support-side fire-suppressing covering material 61 Second inner fire-suppressing covering material 62 Second outer fire-suppressing covering material 70 Connection portion 71 Connection means body 72 Frame-side connecting means body 72a First frame-side connecting piece 72b Second frame-side connecting piece 72c Third frame-side connecting piece 73 Support-side connecting means body 73a First support-side connecting piece 73b Second support-side connecting piece 73c Third support-side connecting piece 74 Support-side fixing member 75 Frame-side fixing member 76 Connection-side fixing member 80 Connection-side fire-suppressing covering material 80a Outdoor fire-suppressing covering material 80b Indoor fire-suppressing covering material 81 Third inner fire-suppressing covering material 82 Third outer fire-suppressing covering material 100 Fitting 110 Alignment portion 200 Fitting 210 Closing fire-suppressing covering material 211 Fourth inner fire-suppressing covering material 212 Fourth outer combustion suppression coating material 220 Spacer 300 Suppression means 311 First connecting piece 312 Second connecting piece

Claims (8)

A fixing structure for fixing a frame material constituting a frame of a fixture to be installed in the skeleton of a building to a wooden support member among the members constituting the skeleton,
a support-side combustion-suppressing covering material that is provided so as to cover at least a portion of the outer surface of the support member and that is a combustion-suppressing covering material for suppressing combustion of the support member;
a connecting means provided between the frame material and the support-side combustion-suppressing covering material, for connecting the frame material and the support member;
The connection means is
a connecting means body;
a support-side fixing member for fixing the connection means body to the support member, the support-side fixing member being inserted into the support member so as to penetrate the connection means body and the support-side combustion-suppressing covering material ,
the support-side combustion-suppressing covering material includes a first support-side combustion-suppressing covering material located on the connection means side,
The first support-side combustion-suppressing covering material is configured so that the entire outer surface of the support member on the connection means side is covered by the first support-side combustion-suppressing covering material;
The connector further includes a connection-side combustion-suppressing covering material that is provided to cover at least one of the facing surfaces of the connector body and that is a combustion-suppressing covering material for suppressing combustion of the connector.
Fixing structure for building frame materials. The support-side combustion-suppressing coating material includes two combustion-suppressing coating materials arranged in a stacked manner.
A fixing structure for a frame material for building fixtures according to claim 1. The frame material is
a frame material body that is a hollow body formed so that the cross-sectional shape is a shape that is open toward the support member side;
a plurality of fixing members arranged in parallel at predetermined intervals along the length direction of the frame member on the open end side of the frame member body,
The connecting means is fixed to the fixing material.
A fixing structure for a frame material for building fixtures according to claim 1 or 2. The connection means is provided so as to be located within a space surrounded only by the flame-suppressing covering material including at least the support-side flame-suppressing covering material and the connection-side flame-suppressing covering material and the steel frame material.
A fixing structure for a frame material for building fixtures according to any one of claims 1 to 3. A plurality of the connection-side combustion suppressing covering materials are arranged so that the connection means is not exposed to the outside.
A fixing structure for a frame material for building fixtures according to any one of claims 1 to 4. The support-side combustion-suppressing coating material is
a first support-side combustion-suppressing coating material located on the connection means side;
a second support-side combustion-suppressing covering material formed separately from the first support-side combustion-suppressing covering material and positioned on the visible surface side of the support member;
The second support-side combustion-suppressing covering material and the connection-side combustion-suppressing covering material are integrally formed.
A fixing structure for a frame material for building fixtures according to any one of claims 1 to 5 . The support-side combustion-suppressing coating material and the connection-side combustion-suppressing coating material are formed separately.
A fixing structure for a frame material for building fixtures according to any one of claims 1 to 6 . The support-side combustion-suppressing coating material is
a first support-side combustion-suppressing coating material located on the connection means side;
a second support-side combustion-suppressing coating material located on the front surface side of the support member,
The second support-side combustion-suppressing covering material and the connection-side combustion-suppressing covering material are substantially flush with each other.
A fixing structure for a building frame material according to any one of claims 1 to 7 .