JP7577016B2 - Structure of structural member connections - Google Patents

Description

The present invention relates to a connection structure of structural members that joins a first load-bearing portion of a first structural member and a second load-bearing portion of a second structural member.

A joint structure for structural members is known that includes a first structural member made of steel, a second structural member that has a wooden core that supports the load and a fire-retardant layer surrounding the core, and a shielding member such as a concrete block that joins the first structural member and the second structural member and transmits force from the first structural member to the core and from the core to the first structural member, while suppressing the transfer of heat from the first structural member to the core (see Patent Document 1, etc.).

Patent No. 5990424

The joint structure disclosed in Patent Document 1 is a structure in which a shielding member such as a concrete block is fixed to a side surface of the core material of the second structural member.
In this case, for example, a concrete block with an anchor bolt embedded in it must be used, and the concrete block must be fixed to the side of the core material of the second structural member by passing the anchor bolt through a through hole formed in the core material and tightening a nut onto the anchor bolt.
However, the task of fixing such anchor bolts in heavy concrete blocks by passing them through holes formed in the core material requires supporting the heavy concrete block while carrying out the work, which is very difficult and poses issues in terms of workability.
In consideration of the above-mentioned problems, the present invention provides a connection structure of structural members that is configured to suppress heat transfer between a first load supporting portion of a first structural member and a second load supporting portion of a second structural member, and that has improved workability.

The connection structure of structural members according to the present invention comprises a first structural member having a first load support portion, a second structural member having a second load support portion, a mounting portion fixed to the first load support portion, and a heat transfer inhibitor member placed on the mounting portion and not fixed to the mounting portion , wherein the first load support portion and the second load support portion are each load support portions formed from different materials, and the second load support portion is placed on the heat transfer inhibitor member and not fixed to the heat transfer inhibitor member.Therefore , a connection structure of structural members with improved workability can be provided in a connection structure of structural members configured to suppress heat transfer between the first load support portion of the first structural member and the second load support portion of the second structural member.
Furthermore, since the mounting surface of the mounting portion and the surface of the heat transfer inhibitor placed on the mounting surface are engaged with each other in a concave-convex manner, and the surface of the heat transfer inhibitor and the surface of the second load support portion placed on the surface are engaged with each other in a concave-convex manner, it is possible to easily provide a connection structure for structural members that can transmit force from the first load support portion to the second load support portion, and can transmit force from the second load support portion to the first load support portion.
Since the first load support portion and the second load support portion are each formed from different materials, heat transfer between the first load support portion of the first structural member and the second load support portion of the second structural member can be suppressed.
The first structural member is characterized in that it is configured to include a metal column or metal beam as a first load-supporting portion and a first fire-resistant coating portion provided to cover the surface of the metal column or metal beam, and the second structural member is characterized in that it is configured to include a wooden beam as a second load-supporting portion and a second fire-resistant coating portion provided to cover the surface of the wooden beam.Therefore, it is possible to suppress heat transfer between the metal column or metal beam and the wooden beam, and to improve the fire resistance performance of the metal column or metal beam and the wooden beam.
Furthermore, since a space is formed between a first fire-resistant coating portion provided on the surface of a metal column or metal beam and a second fire-resistant coating portion provided on the beam end surface of a wooden beam so as to face the first fire-resistant coating portion, the transfer of heat from the metal column or metal beam to the wooden beam, and the transfer of heat from the wooden beam to the metal column or metal beam, can be more effectively suppressed through the space.
Furthermore, since the second fire-resistant covering portion is characterized by being composed of one or more fire-resistant covering layers including gypsum board, it is possible to improve fire resistance and workability.

FIG. 1 is a perspective view showing a connection structure between a metal column as a first load-supporting portion and a wooden beam as a second load-supporting portion (first embodiment). FIG. 2 is a cross-sectional view showing the structure of a connection between a metal column and a wooden beam (embodiment 1). FIG. 3 is a cross-sectional view (longitudinal cross-sectional view) corresponding to the cross-section AA in FIG. 2 (first embodiment). 1A and 1B are diagrams showing a connection structure between a metal beam and a wooden beam as a first load-bearing portion, in which (a) is a longitudinal cross-sectional view, and (b) is a cross-sectional view corresponding to the A-A cross section of (a) (embodiment 2). 1A and 1B are diagrams showing the structure of a connection between a metal beam and a wooden beam as a first load-bearing portion, in which (a) is a longitudinal cross-sectional view, and (b) is a cross-sectional view taken along the line A-A in (a) (Embodiment 3).

EMBODIMENT 1
As shown in Figures 1 to 3, the connection structure of the structural member in embodiment 1 comprises a first structural member 1 having a first load support portion, a second structural member 2 having a second load support portion, a mounting portion 3 fixed to the first load support portion, and a heat transfer inhibitor 4 mounted on the mounting portion 3, and the second load support portion is mounted on the heat transfer inhibitor 4, thereby connecting the first load support portion and the second load support portion by the heat transfer inhibitor 4 and the mounting portion 3.
In addition, the first load support portion and the second load support portion are each load support portions formed from different materials, and in the connection structure of the structural member in embodiment 1, a hollow metallic column 10, for example a steel pipe column with a square cross section, as the first load support portion that supports the load, and a wooden beam 20, for example, as the second load support portion that supports the load, are connected by a heat transfer suppression member 4 and a mounting portion 3.

The first structural member 1 is configured to include a metal column 10 as a first load-bearing portion, and a first fire-resistant coating portion 11 provided to cover the surface of the metal column 10.

The first fire-resistant coating portion 11 is composed of, for example, a fire-resistant coating layer made of a fire-resistant board such as a gypsum board arranged to cover the surface of the metal column 10, or a fire-resistant coating layer formed by spraying a fire-resistant coating material made of a mixture of rock wool and cement onto the surface of the metal column 10.
Furthermore, when the first fire-resistant covering portion 11 is constructed as a fire-resistant covering layer made of a fire-resistant board such as gypsum board, it is preferable to provide a surface finishing material on the surface of the first fire-resistant covering portion 11, but it is not necessary to provide such a surface finishing material.

The second structural member 2 is configured to include a wooden beam 20 as a second load-bearing portion and a second fire-resistant coating portion 21 provided on the surface of the wooden beam 20.

The wooden beam 20 is a beam made of wood such as CLT (Cross Laminated Timber), laminated timber, LVL (Laminated Veneer Lumber), or solid wood.
Additionally, CLT, as defined in Notification No. 3079 of the Ministry of Agriculture, Forestry and Fisheries, is "a general material made by arranging or gluing planks or small square timber (including those which have been adjusted by joining and gluing them lengthwise with their grain directions roughly parallel to each other) in the width direction with their grain directions roughly parallel to each other, and then laminating and gluing them together mainly with their grain directions roughly perpendicular to each other to create a structure of three or more layers."
That is, CLT is generally a type of wood constructed by gluing together multiple boards so that the grain directions of the boards cross at right angles, and is known as cross-laminated timber.
Generally, laminated lumber is wood made by bonding together a number of boards so that the grain directions of the boards are parallel to each other.
Moreover, LVL is generally a wood material in which a plurality of veneer panels are laminated and glued together in a manner that is parallel to the grain direction of the veneer panels.

The wooden beam 20 is configured such that one or more recesses 26 are formed on the underside of the beam end 20 e that is placed on the heat transfer suppressing member 4 .
The wooden beam 20 also includes rod-shaped connecting shaft members 6, such as lag screw bolts, protruding upward from the upper surface 25 of the beam for connecting to the floor slab F of the upper floor. A plurality of connecting shaft members 6 are provided at predetermined intervals along the extension direction of the wooden beam 20.
A floor slab F of the upper floor is formed on the upper surface 25 of the wooden beam 20.

The second fire-resistant coating portion 21 is composed of a fire-resistant coating layer that covers both side surfaces 22, 22, the underside 23 and the beam end surface 24 of the wooden beam 20.
The second fire-resistant covering portion 21 may be made of a fire-resistant material such as one or more layers of gypsum board.
Specifically, the second fire-resistant covering portion 21 is a laminated fire-resistant covering layer in which, for example, a plate having heat insulation (fire resistance) is provided between gypsum boards (hereinafter, referred to as a heat-resistant and fire-resistant panel). That is, a first covering layer is formed by attaching a gypsum board of a predetermined thickness to both opposing beam side surfaces 22, 22 of the wooden beam 20, a lower surface 23 of the wooden beam 20, and a beam end surface 24, 24 of the wooden beam 20, a second covering layer is formed by attaching a heat-insulating fire-resistant panel to the surface of the first covering layer, and a third covering layer is formed by attaching a gypsum board of a predetermined thickness to the surface of the second covering layer, that is, a fire-resistant covering portion constituted by a three-layered fire-resistant covering layer.
It is preferable to provide a surface finishing material on the surface of the second fire-resistant covering portion 21, but it is not necessary to provide a surface finishing material.
Furthermore, the second fire-resistant covering portion 21 does not necessarily have to have a three-layer structure, and may have a two-layer structure, a single-layer structure, or a multi-layer structure.
That is, by forming the second fire-resistant covering portion 21 from one or more fire-resistant covering layers including a gypsum board, it is possible to improve the fire resistance and workability.

The mounting portion 3 and the heat transfer suppression member 4 are formed from a material that transmits force from the metal column 10 to the wooden beam 20, and also transmits force from the wooden beam 20 to the metal column 10.

The heat transfer suppression member 4 is formed from a material that suppresses the transfer of heat from the metal column 10 to the wooden beam 20, and also suppresses the transfer of heat from the wooden beam 20 to the metal column 10.

The support portion 3 is formed of a material that transmits force, for example, a metal such as steel, and is fixed to one side 12 of the metallic column 10 by welding or a fixing means such as a bolt, thereby forming a plate that functions as a support for the heat transfer suppression member 4.
In addition, one side surface 12 of the metal column 10 is the surface facing the beam end surface 24 of the wooden beam 20.
2 and 3, the mounting portion 3 is formed of a plate having a rectangular plate surface and a predetermined thickness, and one side edge 32 (e.g., one long side edge) of the rectangle is fixed to one side surface 12 of the metallic column 10 by a fixing means. In a state where the mounting portion 3 is fixed to the one side surface 12 of the metallic column 10, one or more convex portions 31 are formed on the upper surface forming the mounting surface 30 of the mounting portion 3.
It is preferable that the placement portion 3 is supported by a reinforcing support means.
The reinforcing support means is, for example, a plate-shaped support 5 made of a metal such as steel that supports the mounting portion 3 from below. One or more supports 5 may be provided. For example, two supports 5 may be provided so as to support from below both ends of the plate forming the mounting portion 3 fixed to one side surface 12 of the metal column 10 at least in the width direction (the width direction along the longitudinal direction (the width direction corresponding to the beam width direction of the wooden beam 20)) (if only one support 5 is provided, it is sufficient to provide one support 5 that supports the center side of the width direction of the plate forming the mounting portion 3).
3, the support 5 is formed of a plate such as a trapezoidal plate having a right angle portion 50 or a right-angled triangular plate, and is configured such that one edge side of the edges that are perpendicular to each other via the right angle portion 50 of the plate functions as a one-side fixing portion 51, and the other edge side functions as an other-side fixing portion 52. The one-side fixing portion 51 and one side surface 12 of the metallic column 10 are fixed by a fixing means, and the other-side fixing portion 52 and the lower surface 34 of the mounting portion 3 are fixed by a fixing means. When the support 5 is formed of a trapezoidal plate, for example, the one-side fixing portion 51 formed by the lower base of the trapezoid is fixed to one side surface 12 of the metallic column 10, and the other-side fixing portion 52 formed by one leg of the trapezoid is fixed to the lower surface 34 of the mounting portion 3.
The fixing means may be, for example, welding or bolts.

The heat transfer suppressing member 4 is made of a material that transmits force and suppresses the transfer of heat, for example, a concrete block made of concrete.
The heat transfer suppressing member 4 has a lower surface formed with one or more recesses 42 that engage with protrusions 31 formed on the mounting surface (upper surface) 30 of the mounting portion 3 .
The heat transfer suppression member 4 is configured to have one or more protrusions 41 on its upper surface that engage with a recess 26 formed on the underside of the beam end 20e of the wooden beam 20 placed on the heat transfer suppression member 4.

Furthermore, it is preferable that the concrete block constituting the heat transfer suppression member 4 has a convex portion 41 on its upper surface, which is formed by one side of a rectangular prism, for example, and a concave portion 42 on its lower surface opposite the upper surface, and that the size of the upper surface is formed to correspond to the size of the lower surface of the beam end portion 20e of the wooden beam 20.
Furthermore, it is preferable that the mounting surface 30 of the mounting portion 3 be configured to be larger than the bottom surface of the concrete block that constitutes the heat-transfer suppressing member 4 .

That is, according to the connection structure of the structural member according to the first embodiment, the lower surface of the heat transfer suppression member 4 is placed on the mounting surface 30 of the mounting portion 3 so that the convex portion 31 formed on the mounting surface 30 of the mounting portion 3 and the concave portion 42 formed on the lower surface of the heat transfer suppression member 4 are engaged, and the beam end portion 20e of the wooden beam 20 is placed on the upper surface of the heat transfer suppression member 4 so that the convex portion 41 formed on the upper surface of the heat transfer suppression member 4 and the concave portion 26 formed on the lower surface of the beam end portion 20e of the wooden beam 20 are engaged. As a result, the mounting portion 3 and the heat transfer suppression member 4 are configured to transmit forces such as shear force from the metal column 10 to the wooden beam 20 and to transmit forces such as shear force from the wooden beam 20 to the metal column 10, and the heat transfer suppression member 4 is configured to suppress the transfer of heat from the metal column 10 to the wooden beam 20 and to suppress the transfer of heat from the wooden beam 20 to the metal column 10.

An example of a construction procedure for the connection structure having the above-described configuration will be described.
First, one side edge 32 of the support portion 3 and one side surface 12 of the metallic column 10 are connected by welding or the like, thereby fixing the support portion 3 to the metallic column 10 .
Next, one side fixing portion 51 of the support 5 and one side surface 12 of the metallic column 10 are connected by welding or the like, and the other side fixing portion 52 of the support 5 and the lower surface 34 of the mounting portion 3 are connected by welding or the like.
The heat-transfer suppressing member 4 is then placed on the mounting surface 30 of the mounting portion 3 so that the protrusions 31, 31 . . . of the mounting surface 30 of the mounting portion 3 engage with the recesses 42, 42 .
Furthermore, the beam end 20e of the wooden beam 20 is placed on the heat transfer suppression member 4 so that the recesses 26, 26... on the underside of the beam end 20e of the wooden beam 20, which is made so that multiple connecting shaft materials 6, 6... protrude upward from the upper surface 25, engage with the protrusions 41, 41... on the upper surface of the heat transfer suppression member 4.
Next, a formwork for pouring concrete (not shown) is installed to form the floor slab F of the upper floor, and concrete is poured onto the formwork and onto the wooden beams 20 to form the floor slab F of the upper floor.
Therefore, the wooden beam 20 is joined to the floor slab F of the upper floor by the connecting shaft 6 which is provided so as to protrude upward from the upper surface 25 of the wooden beam 20 .
Then, a first fire-resistant coating portion 11 is formed on the exposed surface of the metal column 10, and a second fire-resistant coating portion 21 is formed on the exposed surface of the wooden beam 20 (beam side surfaces 22, 22, underside 23, and beam end surfaces 24, 24).
The above-mentioned order of the construction steps is merely an example, and the construction steps do not have to be in the order described above.
For example, after the mounting portion 3 and the support body 5 are fixed to one side surface 12 of the metal column 10, the first fire-resistant coating portion 11 is formed on the surface of the metal column 10, and then the heat-transfer suppression member 4 is placed on the mounting surface 30 of the mounting portion 3. Then, the beam end portion 20e of the second structural member 2, which has been formed by providing the second fire-resistant coating portion 21 on the surface of the wooden beam 20, may be placed on the heat-transfer suppression member 4, and then the floor slab F of the upper floor may be formed.

As a result, the heat transfer suppression member 4 and the mounting portion 3 are configured to transmit force from the metal column 10, which is the first load support portion, to the wooden beam 20, which is the second load support portion, and to transmit force from the wooden beam 20 to the metal column 10, and the heat transfer suppression member 4 suppresses the transfer of heat from the metal column 10 to the wooden beam 20, and also suppresses the transfer of heat from the wooden beam 20 to the metal column 10, forming a connection structure between the metal column 10 and the wooden beam 20.

According to the connection structure of embodiment 1, a concrete block serving as a heat transfer suppression member 4 formed from a material that suppresses the transfer of heat from the metal column 10 to the wooden beam 20 and also suppresses the transfer of heat from the wooden beam 20 to the metal column 10 is placed on the mounting surface 30 of the mounting portion 3 fixed to the metal column 10, and the beam end portion 20e of the wooden beam 20 is placed on the concrete block, forming a connection structure.
In other words, according to the connection structure of embodiment 1, the concrete block serving as the heat transfer suppression member 4 is simply placed on the support surface 30 of the support portion 3 fixed to the metal column 10, thereby eliminating the need for the work of supporting the concrete block, which is a heavy object, while fixing it to the metal column 10, as in the joint structure disclosed in Patent Document 1, and therefore the construction of the connection structure configured to suppress heat transfer between the metal column 10 and the wooden beam 20 can be easily carried out.
Furthermore, construction can be easily carried out since it is only necessary to place the beam end 20e of the wooden beam 20 on the concrete block.
In other words, it is possible to easily provide a connection structure for structural members that can transmit forces such as shear force from the metal column 10 to the wooden beam 20, and can transmit forces such as shear force from the wooden beam 20 to the metal column 10, and can suppress the transfer of heat from the metal column 10 to the wooden beam 20, and can also suppress the transfer of heat from the wooden beam 20 to the metal column 10.
In other words, according to embodiment 1, it is possible to provide a connection structure of a structural member that is capable of transmitting forces such as shear force between the metal column 10 and the wooden beam 20 and is configured to suppress heat transfer between the metal column 10 and the wooden beam 20, and that has improved workability.
In addition, since the metal column 10 is provided with the first fire-resistant coating portion 11, the fire resistance of the metal column 10 can be improved, and since the metal column 10 is provided with the second fire-resistant coating portion 21, the fire resistance of the wooden beam 20 can be improved.

Furthermore, as shown in Figures 2 and 3, in the connection structure of embodiment 1, a space S1 is provided between the first fire-resistant coating portion 11 provided on one side 12 of the metal column 10 and the second fire-resistant coating portion 21 provided on the beam end surface 24 of the wooden beam 20. This makes it possible to more effectively suppress the transfer of heat from the metal column 10 to the wooden beam 20, and from the wooden beam 20 to the metal column 10, via the space S1.
Furthermore, as shown in Figures 2 and 3, in the connection structure of embodiment 1, a space S2 is provided between the first fire-resistant coating portion 11 provided on one side 12 of the metal column 10 and the heat transfer suppression member 4, so that the transfer of heat from the metal column 10 to the wooden beam 20, and from the wooden beam 20 to the metal column 10, can be more effectively suppressed through the space S2.
It is not necessary to form the spaces S1 and S2. That is, the first fire-resistant coating 11 provided on one side surface 12 of the metal column 10 and the second fire-resistant coating 21 provided on the beam end surface 24 of the wooden beam 20 may be in contact with each other, or the first fire-resistant coating 11 provided on one side surface 12 of the metal column 10 and the heat-transfer suppressing member 4 may be in contact with each other.

In embodiment 1, a connection structure between a metal column 10 as a first load-supporting portion and a wooden beam 20 as a second load-supporting portion is exemplified. However, as in embodiments 2 and 3 described below, a connection structure connecting, for example, a metal beam 7 as a first load-supporting portion joined to a metal column 10 and a wooden beam 20 as a second load-supporting portion can also be configured in a similar manner to embodiment 1.
In addition, in Figure 4 explaining the second embodiment and Figure 5 explaining the third embodiment, parts that are the same as or equivalent to the parts shown in Figures 1 to 3 of the first embodiment are given the same reference numerals, and detailed description thereof will be omitted.

EMBODIMENT 2
In embodiment 2, for example, as shown in Figure 4, a metal beam 7 and a mounting portion 3 are fixed, a reinforcing body 8 is provided under the metal beam 7, and one or more supports 5 supporting the mounting portion 3 are fixed to the reinforcing body 8.
The metal beam 7 is, for example, an H-shaped steel having flanges 7b, 7c on the top and bottom of a web 7a, and the reinforcing member 8 is, for example, an H-shaped steel having flanges 8b, 8c on the top and bottom of a web 8a.
In this embodiment 2, the metal beam 7 and the reinforcing body 8 are fixed via a fixing means so that the lower surface of the lower flange 7c of the metal beam 7 and the upper surface of the upper flange 8b of the reinforcing body 8 are in contact with each other.
Furthermore, in the lower flange 7c of the metal beam 7, the side edge 7d of the reinforcing body 8 that is positioned on the wooden beam 20 side and one side edge 32 of the mounting portion 3 are fixed via a fixing means, so that the material axis of the board that constitutes the mounting portion 3 and the material axis of the lower flange 7c of the metal beam 7 are positioned on the same plane (e.g., the same horizontal plane).
The support body 5 supporting the mounting portion 3 may have a configuration in which one side fixing portion 51 is formed by an edge fixed via a fixing means to the underside of the upper flange 8b, the upper side of the lower flange 8c, and one side of the web 8a continuing from these underside and upper side on the side positioned on the wooden beam 20 side of the reinforcing body 8, and the other side fixing portion 52 is formed by an edge fixed to the underside 34 of the mounting portion 3 via a fixing means.
In addition, Figure 4 illustrates an example of a configuration in which at least the central side in the width direction of the plate forming the mounting portion 3 fixed to the side edge 7d of the lower flange 7c of the metal beam 7 is supported from below using one support body 5.
In this case, it is preferable to provide a reinforcing plate 71 fixed via fixing means to the underside of the upper flange 7b, the upper side of the lower flange 7c, and one side of the web 7a continuing from these underside and upper sides on the wooden beam 20 side of the metal beam 7 positioned above the support body 5.
It is also preferable to provide a reinforcing plate 72 fixed via fixing means to the underside of the upper flange 7b, the upper side of the lower flange 7c, and the other side of the web 7a continuing from these underside and upper sides of the metal beam 7 positioned above the support body 5, opposite the wooden beam 20 side.
Furthermore, it is preferable to provide a reinforcing plate 81 fixed via fixing means to the underside of the upper flange 8b, the upper side of the lower flange 8c, and the other side of the web 8a continuing from these underside and upper sides on the side opposite the wooden beam 20 of the reinforcing body 8.

EMBODIMENT 3
As shown in FIG. 5, a connection structure may be configured that connects a metal beam 7 as a first load-bearing portion joined to a metal column 10 and a wooden beam 20 as a second load-bearing portion.
In the third embodiment, for example, the metal beam 7 is made of an H-shaped steel having flanges 7b, 7c on the top and bottom of the web 7a, as in the second embodiment, and as shown in Figure 5, one surface of the web 7a of the metal beam 7 facing the wooden beam 20 and one side edge 32 of the support portion 3 are fixed via a fixing means, and one or more supports 5 are provided to support the support portion 3.
In addition, the other surface of the web 7a of the metal beam 7 opposite the wooden beam 20 side and one side edge of the reinforcing plate 35 are fixed via a fixing means.
The material axis of the plate constituting the mounting portion 3 and the material axis of the plate of the reinforcing plate 35 are configured to be positioned on the same plane (for example, the same horizontal plane).
The support body 5 may have a configuration in which the one-side fixing portion 51 is formed by an edge fixed via a fixing means to one surface of the web 7a of the metal beam 7 facing the wooden beam 20 and to the upper surface of the lower flange 7c continuous with that one surface, and the other-side fixing portion 52 is formed by an edge fixed via a fixing means to the lower surface 34 of the support portion 3.
In addition, FIG. 5 illustrates a configuration in which at least the central side in the width direction of the plate forming the mounting portion 3 fixed to the web 7a of the metal beam 7 is supported from below by one support member 5.
In this case, it is preferable to provide a reinforcing plate 73 fixed via fixing means to the underside of the upper flange 7b on the wooden beam 20 side of the metal beam 7 positioned above the support body 5, one side of the web 7a continuing from the underside, and the upper surface of the mounting portion 3 continuing from the one side.
It is also preferable to provide a reinforcing plate 74 fixed via a fixing means to the underside of the upper flange 7b on the side opposite the wooden beam 20 of the metal beam 7 positioned above the support body 5, the other side of the web 7a continuing from the underside, and the upper surface of the reinforcing plate 35 continuing from the other side.
It is also preferable to provide a reinforcing plate 75 fixed via a fixing means to the other surface of the web 7a of the metal beam 7 opposite the wooden beam 20 side, the lower surface of the reinforcing plate 35 continuous with the other surface, and the upper surface of the lower flange 7c.

In the second embodiment, it is preferable that the material axes of the plates constituting the support body 5 and the reinforcing plates 71, 72, and 81 are positioned on the same plane (for example, the same vertical plane).
Although it is preferable to provide the reinforcing plates 71, 72, and 81, they are not necessarily required. For example, they may not be provided when the strength of the metal beams 7 and the reinforcing members 8 is sufficient.
In the third embodiment, it is preferable that the material axes of the plates constituting the support body 5 and the reinforcing plates 73, 74, and 75 are positioned on the same plane (for example, the same vertical plane).
Although it is preferable to provide the reinforcing plate 35 and the reinforcing plates 73, 74, and 75, they are not necessarily required. For example, they may not be provided when the strength of the metal beam 7 is sufficient.
In the second and third embodiments, the fixing means may be, for example, welding or bolts.
Even with the connection structure between the metal beam 7 as the first load-supporting portion and the wooden beam 20 as the second load-supporting portion in the above-described second and third embodiments, the same effects as those of the first embodiment can be obtained.

Alternatively, a recess may be formed on the mounting surface 30 of the mounting portion 3 , and a protrusion that engages with the recess may be formed on the lower surface of the heat-transfer suppressing member 4 .
In addition, a configuration may be adopted in which a recess is formed on the upper surface of the heat transfer suppression member 4 and a protrusion that engages with the recess is formed on the lower surface of the beam end portion 20 e of the wooden beam 20 .
In other words, in the present invention, a configuration is adopted in which one of the mounting surface 30 of the mounting portion 3 and the lower surface of the heat transfer suppression member 4 placed on the mounting surface 30 has a concave portion, and the other of the mounting surface 30 of the mounting portion 3 and the lower surface of the heat transfer suppression member 4 placed on the mounting surface 30 has a convex portion, so that the lower surface of the heat transfer suppression member 4 is placed on the mounting surface 30 of the mounting portion 3 so that the concave portion and the convex portion are engaged with each other, and a configuration is adopted in which one of the upper surface of the heat transfer suppression member 4 and the lower surface of the beam end 20e of the wooden beam 20 placed on the upper surface has a concave portion, and the other of the upper surface of the heat transfer suppression member 4 and the lower surface of the beam end 20e of the wooden beam 20 placed on the upper surface has a convex portion, so that the lower surface of the beam end 20e of the wooden beam 20 is placed on the upper surface of the heat transfer suppression member so that the concave portion and the convex portion are engaged with each other.

The recesses and protrusions, which are the components of the present invention, may be formed, for example, by using a mold or by cutting processing.
In addition, as a configuration for unevenly engaging the supporting surface 30 of the supporting portion 3 with the underside of the heat transfer inhibition member 4 placed on the supporting surface 30, and a configuration for unevenly engaging the upper surface of the heat transfer inhibition member 4 with the underside of the beam end 20e of the wooden beam 20 placed on the upper surface, small unevenness may be formed on the supporting surface 30 of the supporting portion 3, the underside of the heat transfer inhibition member 4 placed on the supporting surface 30, the upper surface of the heat transfer inhibition member 4, and the underside of the beam end 20e of the wooden beam 20 placed on the upper surface.
In other words, the mounting surface 30 of the mounting portion 3, the underside of the heat transfer inhibition member 4 placed on the mounting surface 30, the upper surface of the heat transfer inhibition member 4, and the underside of the beam end 20e of the wooden beam 20 placed on the upper surface are each formed into a rough surface with small irregularities, so that the mounting surface 30 of the mounting portion 3 and the underside of the heat transfer inhibition member 4 placed on the mounting surface 30 are engaged with each other in an uneven manner, and the upper surface of the heat transfer inhibition member 4 and the underside of the beam end 20e of the wooden beam 20 placed on the upper surface are engaged with each other in an uneven manner.

In addition, in each embodiment, a configuration is exemplified in which the supporting surface 30 of the supporting portion 3 and the underside of the heat transfer suppression member 4 placed on the supporting surface 30 engage with each other in a concave-convex manner, and the upper surface of the heat transfer suppression member 4 and the underside of the beam end portion 20e of the wooden beam 20 placed on the upper surface engage with each other in a concave-convex manner, but this concave-convex engagement configuration is not necessary.
That is, the heat-transfer-suppressing member 4 may be placed on the mounting surface 30 so that the mounting surface 30 of the mounting portion 3, which has no unevenness, is in surface contact with the lower surface of the heat-transfer-suppressing member 4, and the beam end 20e of the wooden beam 20 may be placed on the upper surface of the heat-transfer-suppressing member 4 so that the upper surface of the heat-transfer-suppressing member 4, which has no unevenness, is in surface contact with the lower surface of the beam end 20e of the wooden beam 20. Even in this case, the load of the floor slab F of the upper floor is applied to the heat-transfer-suppressing member 4 and the mounting portion 3 through the wooden beam 20, so that the adhesion between the mounting surface 30 and the lower surface of the heat-transfer-suppressing member 4 and the adhesion between the upper surface of the heat-transfer-suppressing member 4 and the lower surface of the beam end 20e of the wooden beam 20 are maintained, and the metal column or metal beam as the first load supporting portion and the wooden beam as the second load supporting portion are connected by the heat-transfer-suppressing member 4 and the mounting portion 3.

In addition, in each embodiment, an example has been described in which the first load-supporting part is a metal column 10 or a metal beam, and the second load-supporting part is a wooden beam 20, but the connection structure of the present invention can also be applied in cases in which the first load-supporting part is a wooden column or a wooden beam, and the second load-supporting part is a metal beam.
That is, in each embodiment, a configuration has been exemplified in which a mounting portion 3 fixed to a metal column 10 or a metal beam as a first load support portion, a heat transfer suppression member 4 placed on the mounting surface 30 of the mounting portion 3, and a wooden beam 20 as a second load support portion is placed on the heat transfer suppression member 4, but a configuration may also be used in which a mounting portion fixed to a wooden column or a wooden beam as the first load support portion, and a heat transfer suppression member placed on the mounting surface of the mounting portion, and the metal beam as the second load support portion is placed on the heat transfer suppression member.

In the above, the case where one of the first load-supporting portion and the second load-supporting portion is a metallic load-supporting portion and the other is a wooden load-supporting portion has been exemplified, but the first load-supporting portion and the second load-supporting portion may be load-supporting portions made of materials other than metal and wood. For example, one of the first load-supporting portion and the second load-supporting portion may be a metallic load-supporting portion and the other is a concrete load-supporting portion.
That is, in the connection structure of the present invention, the first load support portion and the second load support portion may be load support portions formed from different materials.

Furthermore, in each of the embodiments, an example has been shown in which a concrete block is used as the heat-transfer suppressing member 4, but the heat-transfer suppressing member 4 may be something other than a concrete block.
In other words, the heat transfer suppression member 4 may be any material as long as it is capable of suppressing the transfer of heat from the first load support portion to the second load support portion, and also capable of suppressing the transfer of heat from the second load support portion to the first load support portion, and is formed from a material on which the second load support portion can be placed.

In addition, the concave-convex engagement between the mounting surface 30 of the mounting portion 3 and the underside of the heat transfer suppression member 4 placed on the mounting surface 30 may be a concave-convex engagement structure that includes recesses formed on both the mounting surface 30 of the mounting portion 3 and the underside of the heat transfer suppression member 4, and an engagement portion (engagement piece) that is provided between these recesses and engages with these recesses.
Similarly, the concave-convex engagement between the upper surface of the heat transfer suppression member 4 and the lower surface of the second load support part (the lower surface 23 of the wooden beam 20) placed on said surface may be a concave-convex engagement structure having recesses formed on both the upper surface of the heat transfer suppression member 4 and the lower surface of the second load support part, and an engagement part (engagement piece) provided between these recesses and engaging with these recesses.

Furthermore, the present invention is also applicable to structural members other than columns and beams.
For example, the present invention can be applied to connection structures between columns and earthquake-resistant walls, between columns and floors, and between earthquake-resistant walls and floors.

1 First structural member, 2 Second structural member, 3 Placement portion, 4 Heat transfer suppressing member,
7 Metal beam (first load-bearing portion), 10 Metal column (first load-bearing portion),
11 First fire-resistant covering portion, 20 Wooden beam (second load-bearing portion), 20e Beam end portion,
21 second fireproof covering portion, 30 mounting surface, 26, 42 recessed portion, 31, 41 protruding portion.

Claims (5)

a first structural member having a first load bearing portion;
a second structural member having a second load bearing portion;
A mounting portion fixed to the first load support portion;
a heat transfer suppressing member that is placed on the mounting portion and is not fixed to the mounting portion ,
the first load support portion and the second load support portion are load support portions formed of different materials,
A connection structure for structural members, wherein the second load support portion is placed on the heat-transfer suppressing member and is not fixed to the heat-transfer suppressing member . The connection structure of the structural member according to claim 1, characterized in that the mounting surface of the mounting portion and the surface of the heat transfer suppression member placed on the mounting surface are engaged with each other in a concave-convex manner, and the surface of the heat transfer suppression member and the surface of the second load support portion placed on the surface are engaged with each other in a concave-convex manner. The first structural member is configured to include a metal column or a metal beam as a first load-supporting portion, and a first fire-resistant covering portion provided to cover a surface of the metal column or the metal beam,
The connection structure of a structural member as described in claim 1 or claim 2, characterized in that the second structural member is configured to include a wooden beam as a second load-supporting portion and a second fire-resistant coating portion provided to cover the surface of the wooden beam. The connection structure of structural members according to claim 3, characterized in that a space is formed between a first fire-resistant coating portion provided on the surface of the metal column or metal beam and a second fire-resistant coating portion provided on the beam end surface of the wooden beam so as to face the first fire-resistant coating portion. The connection structure of structural members according to claim 3 or 4, characterized in that the second fire-resistant coating portion is composed of one or more fire-resistant coating layers including gypsum board.

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