Wooden structural material joining structure

Abstract

To provide a technology that can minimize the use of through bolt fastening portions, which are a cause of deterioration in design, while preventing the opening portion of a slit formed in a wooden structural material from widening even when a narrow wooden structural material is used in a wooden structural material joining structure in which an end of the wooden structural material is joined to a predetermined joined point by inserting a joining plate fixed to the joined point from the end face side of the wooden structural material into a slit formed in the end of the wooden structural material.SOLUTION: At the end of a wooden structural material 10, a slit 11 is formed so as to be open only in two directions, that is, an end face 10a of the wooden structural material 10 and a slit opening side face 10b which is one side face adjacent to the end face 10a. At the end of the wooden structural material 10, a through bolt fastening portion 2 is disposed in an area adjacent to the slit opening side face 10b, and a drift pin insertion portion 3 is disposed in the other area.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a wooden structural member joining structure provided with a fixing portion for fixing a joining plate fixed to a predetermined joining portion to a slit formed at an end portion of a wooden structural member by inserting the joining plate from an end face side of the wooden structural member, and inserting a rod-shaped body into a through hole penetrating the end portion of the wooden structural member and the joining plate to fix the joining plate to the end portion of the wooden structural member.

Background Art

[0002] A wooden structural member joining structure is known in which an end portion of a wooden structural member is joined to a joining portion by inserting a joining plate fixed to a predetermined joining portion from an end face side of the wooden structural member into a slit formed at the end portion of the wooden structural member (see, for example, Patent Document 1). Furthermore, the wooden structural member joining structure described in Patent Document 1 includes, as a fixing portion for inserting a rod-shaped body into a through hole penetrating the end portion of the wooden structural member and the joining plate to fix the joining plate to the end portion of the wooden structural member, a through bolt fastening portion formed by fastening a through bolt as a rod-shaped body to the through hole, and a drift pin penetration portion formed by penetrating a drift pin as a rod-shaped body into the through hole. That is, in the wooden structural member joining structure described in this Patent Document 1, the end portion of the wooden structural member in which the slit is formed is fastened in the material width direction by the through bolt fastening portion, and the joining strength is ensured by the shear resistance of the through bolt and the drift pin.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the wooden structural member joining structure described in Patent Document 1, when a joining plate is inserted into a slit formed at the end of a wooden structural member from the end face side of the wooden structural member, the slit is open in three directions: the end face into which the joining plate is inserted, and both side faces disposed on both sides in the extending direction of the slit adjacent to the end face. Further, at the end of the wooden structural member, a bolt fastening portion is disposed substantially at the center, and a drift pin insertion portion is disposed around it. That is, in the region adjacent to both side faces where the slit is open at the end of the wooden structural member, there is no through-bolt fastening portion, and only the drift pin insertion portion into which a drift pin that is not tightened in the width direction of the slit is inserted is disposed. Thus, for example, when using a wooden structural member with a small width, widening of the slit width over time may become a problem on each of the both side faces at the end of the above-described wooden structural member. Also, in order to prevent widening of the slit width at the open portion, it is conceivable to make all of the fixing portions in the regions near each of the both side faces where the slit is open in the wooden structural member into through-bolt fastening portions. However, since the use of through-bolt fastening portions will increase, there is a concern about deterioration of the design.

[0005] In view of this situation, the main problem of the present invention is to provide a technology that can minimize the use of through-bolt fastening portions, which are a factor in the deterioration of the design, while preventing the widening of the width of the open portion of the slit formed in the wooden structural member, in a wooden structural member joining structure in which the end of the wooden structural member is joined to a predetermined joint portion by inserting a joining plate fixed to the predetermined joint portion into a slit formed at the end of the wooden structural member from the end face side of the wooden structural member, even when using, for example, a wooden structural member with a small width.

Means for Solving the Problem

[0006] The first characteristic configuration of the present invention is that a joining plate fixed to a predetermined joint portion is inserted into a slit formed at the end of a wooden structural member from the end face side of the wooden structural member, As a fixing part for fixing the joint plate to the end of the wooden structural member by inserting a rod-shaped body through a through-hole penetrating the end of the wooden structural member and the joint plate, a through-bolt fastening part formed by fastening a through-bolt as the rod-shaped body to the through-hole, and a drift pin penetration part formed by penetrating a drift pin as the rod-shaped body into the through-hole, a wooden structural member joint structure is provided, At the end of the wooden structural member, the slit is formed to be open only in two directions, namely, the end face of the wooden structural member and one slit open side face adjacent to the end face, At the end of the wooden structural member, the through-bolt fastening part is arranged in a region adjacent to the slit open side face, and the drift pin penetration part is arranged in other regions.

[0007] According to this configuration, at the end of the wooden structural member, the slit is formed to be open only in two directions, namely, the end face of the wooden structural member and one slit open side face adjacent to the end face. Then, the through-bolt fastening part is arranged in a region adjacent to the slit open side face, and the drift pin penetration part is arranged in other regions. Thus, among the two side faces arranged on both sides in the extending direction of the slit adjacent to the end face of the wooden structural member, one side face becomes the slit open side face where the slit is open, and the other side face becomes the slit closed side face where the slit is not open. Then, on the slit open side face, the expansion of the slit width can be blocked by the through-bolt fastening part arranged adjacent thereto. On the other hand, on the slit closed side face, since the slit is not open in a state closed by the wood element, the expansion of the slit width can be blocked. And among the plurality of fixing parts arranged at the end of the wooden structural member, the through-bolt fastening part can be limited to those arranged in the region adjacent to the slit open side face. Therefore, according to the present invention, in a wooden structure material joining structure in which the end portion of a wooden structure material is joined to a predetermined joint portion by inserting a joint plate fixed to the predetermined joint portion from the end face side of the wooden structure material into a slit formed at the end portion of the wooden structure material, even when a wooden structure material having a small width is used, it is possible to minimize the use of through-bolt fastening portions that cause deterioration of the design while preventing an increase in the width of the opening portion of the slit formed in the wooden structure material.

[0008] A second characteristic configuration of the present invention is that the wooden structure material is a wooden beam provided on the ceiling side, at the end portion of the wooden beam, the slit is open only in two directions, i.e., the end face and the upper surface of the wooden beam.

[0009] According to this configuration, when the wooden structure material is a wooden beam arranged on the ceiling side, the upper surface on the side far from the human eye is used as the slit opening side surface, and the fixing portion arranged in the adjacent region is used as the through-bolt fastening portion, and the lower surface on the side close to the human eye is used as the slit closing side surface, and the fixing portion arranged in the adjacent region is used as the drift pin penetration portion, so that the aesthetic appearance of the portion close to the human eye can be maintained excellent.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Modes for Carrying Out the Invention

[0011] Embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 and 4, the wooden structural member joining structure 1 of the present embodiment (hereinafter abbreviated as "the present joining structure 1") is configured to join the end of a wooden beam 10, which is a wooden structural member, to a steel beam 20 at a predetermined joining location by inserting a joining plate 21 fixed to the steel beam 20 into a slit 11 formed at the end of the wooden beam 10 from the end face 10a side of the wooden beam 10 (the form shown in FIG. 1).

[0012] The present joining structure 1 is adopted as a structure for joining a purlin extending in the span direction, a main roof, or a gable purlin in the roof structure portion to a rafter extending in the roof flow direction. That is, the steel beam 20 is a purlin, a main roof, or a gable purlin, and the wooden beam 10 is a rafter joined to the steel beam 20, and a roof finishing material 5 such as a sheathing board is supported by these steel beam 20 and wooden beam 10. In the following description, the direction parallel to the beam axis of the wooden beam 10 is referred to as the X direction (see FIGS. 1, 3, and 4), the direction parallel to the beam axis of the steel beam 20 is referred to as the Y direction (see FIGS. 2 and 3), and the direction orthogonal to these X and Y directions is referred to as the Z direction (see FIGS. 1, 2, and 4). And both the slit 11 formed at the end of the wooden beam 10 and the joining plate 21 inserted therein are formed so as to be orthogonal to the Y direction and extend in the X and Z directions.

[0013] As shown in FIGS. 1, 3, and 4, the wooden beam 10 is joined to each of both sides of the steel beam 20 along the X direction, and the present joining structure 1 is adopted at these both-side joining portions. These both-side present joining structures 1 have the same configuration except for the shape of through holes 22 and 23 described later.

[0014] As shown in FIGS. 1, 2, and 4, a plurality of through holes 12 and 13 penetrating the wooden beam 10 through the slit 11 are formed at the end of the wooden beam 10. On the other hand, a plurality of through holes 22 and 23 penetrating the joining plate 21 are also formed at the same positions as the through holes 12 and 13 in a state where the joining plate 21 is inserted into the slit 11 formed at the end of the wooden beam 10. Then, as shown in FIGS. 1 and 2, in the present joining structure 1, in a state where the joining plate 21 is inserted into the slit 11 formed at the end of the wooden beam 10, rod-like bodies 32 and 33 are inserted into these through holes 12, 13, 22, and 23 to fix the joining plate 21 to the end of the wooden beam 10. A plurality of fixing portions 2 and 3 are provided. In the present embodiment, at the end of the wooden beam 10 joined to the joining plate 21, three fixing portions 2 and 3 are arranged side by side along the Z direction.

[0015] Furthermore, in the present embodiment, in order to adjust the relative position in the X direction between the wooden beam 10 and the steel beam 20, among the joining plates 21 fixed to both sides of the steel beam 20, the through holes 22 and 23 formed in one of them are formed as long holes having the X direction as the longitudinal direction. Note that, among the joining plates 21 fixed to both sides of the steel beam 20, the through holes 22 and 23 formed in both of them may be formed as long holes. Also, when there is no problem in adjusting the relative position in the X direction between the wooden beam 10 and the steel beam 20, the through holes 22 and 23 formed in both of them may be formed as round holes without being long holes.

[0016] As the above-described plurality of fixing portions 2 and 3, a through bolt fastening portion 2 and a drift pin penetration portion 3 are provided. The through bolt fastening portion 2 is formed by fastening a through bolt 32 as a rod-like body to a bolt through hole 12 formed at the end of the wooden beam 10 and a bolt through hole 22 formed in the joining plate at the same position as it. On the other hand, the drift pin penetration portion 3 is formed by penetrating a drift pin 33 as a rod-like body into a pin through hole 13 formed at the end of the wooden beam 10 and a pin through hole 23 formed in the joining plate at the same position as it. That is, in the present joining structure 1, while the end of the wooden beam 10 in which the slit 11 is formed is tightened in the material width direction (Y direction) by the through bolt fastening portion 2, the joining strength is ensured by the shear strength of the drift pin 33 of the drift pin penetration portion 3 in addition to the shear strength of the through bolt 32 of the through bolt fastening portion 2.

[0017] In this embodiment, the wooden beam 10 is configured as a wooden structural material with a small width. And even when such a wooden beam 10 with a small width is adopted, this joining structure 1 adopts a configuration for minimizing the use of the through-bolt fastening portion 2 which is a factor for deterioration of the design property while preventing the widening of the width of the opening portion of the slit 11 formed in the wooden beam 10, and the details thereof will be described below.

[0018] As shown in FIGS. 1, 2, and 3, the end portion of the wooden beam 10 includes an end face 10a on the side of the steel beam 20, an upper surface 10b which is one side face adjacent to the end face 10a along the Z direction, and a lower surface 10c which is the other side face adjacent to the end face 10a along the Z direction. At the end portion of this wooden beam 10, the slit 11 extending along the X direction and the Z direction is formed to be open only in two directions of the end face 10a and the upper surface 10b, and is closed without being open to the lower surface 10c. That is, among the upper and lower surfaces 10b and 10c arranged on both sides in the Z direction which is the extending direction of the slit 11 adjacent to the end face 10a of the wooden beam 10, the upper surface 10b on one side becomes a slit opening side face where the slit 11 is open, and the lower surface 10c on the other side becomes a slit closing side face where the slit 11 is not open.

[0019] As shown in FIGS. 1 and 2, at the end portion of the wooden beam 10, the above-described through-bolt fastening portion 2 is arranged in a region adjacent to the upper surface 10b which is the slit opening side face, and a drift pin penetration portion 3 is arranged in another region other than the region where the through-bolt fastening portion 2 is arranged. That is, among the upper and lower surfaces 10b and 10c arranged on both sides in the Z direction which is the extending direction of the slit 11 adjacent to the end face 10a of the wooden beam 10, in the upper surface 10b, the widening of the width of the slit 11 will be blocked by the through-bolt fastening portion 2 arranged adjacent thereto. On the other hand, among the above-described upper and lower surfaces 10b and 10c, in the lower surface 10c where the slit 11 is not formed, since the slit 11 is not open in a state of being closed by the wood elements constituting the wooden beam 10, the widening of the width of the slit 11 will be blocked. Among the plurality of fixing parts 2 and 3 arranged at the end of the wooden beam 10, the region where the through-bolt fastening part 2 is arranged is limited to the region adjacent to the upper surface 10b which is the side surface where the slit 11 is opened. Specifically, in the present embodiment, at the end of the wooden beam 10 joined to the joining plate 21, among the three fixing parts 2 and 3 arranged side by side along the Z direction, only the uppermost one closest to the upper surface 10b is the through-bolt fastening part 2, and the remaining two are the drift pin insertion parts 3.

[0020] In the present embodiment, the wooden beam 10 is provided in the roof structure part on the ceiling side of the indoor space. And at the end of the wooden beam 10, the slit 11 is opened in two directions of the end face 10a on the side of the steel beam 20 and the adjacent upper surface 10b, and is not opened on the lower surface 10c. And at the end of the wooden beam 10, the through-bolt fastening part 2 is arranged only in the region of the upper surface 10b on the side far from the eyes of the people in the indoor space, and the drift pin insertion part 3 is arranged in the region adjacent to the lower surface 10c on the side close to the eyes of the people. Therefore, in the present joining structure 1, the aesthetics of the part on the side close to the eyes of the people is maintained to be excellent.

[0021] 〔Alternative Embodiment〕 Another embodiment of the present invention will be described. Note that the configurations of the respective embodiments described below are not limited to being applied alone, and can also be applied in combination with the configurations of other embodiments.

[0022] (1) In the above embodiment, in the present joining structure 1, the wooden structural material and the object to be joined to which it is joined are the wooden beam 10 which is a rafter and the steel beam 20 which is a ridge beam, a main roof beam, or an eaves beam in the roof structure part. However, these wooden structural materials and the joined parts may be other things in the roof structure part or things in a structural part other than the roof structure part.

[0023] (2) In the above embodiment, the form of joining the wooden beam 10 to each of both sides of the steel beam 20 along the X direction has been described. However, naturally, the wooden beam 10 may be joined to only one side of the steel beam 20.

[0024] (3) In the above-described embodiment, at the end of the wooden beam 10 joined to the joining plate 21, three fixing parts 2 and 3 are arranged side by side along the Z direction, and only the uppermost one of them is the through-bolt fastening part 2, and the remaining two are the drift pin insertion parts 3. However, under the condition that the through-bolt fastening part 2 is arranged in the region adjacent to the upper surface 10b where the slit 11 is arranged, and the drift pin insertion part 3 is arranged in other regions, the arrangement state and number of the through-bolt fastening part 2 and the drift pin insertion part 3 can be appropriately changed.

Explanation of reference numerals

[0025] 1 Wooden structure member joining structure 2 Fixing part 2 Through-bolt fastening part 3 Drift pin insertion part 3 Fixing part 10 Wooden beam (wooden structure member) 10a End face 10b Upper surface (slit open side surface) 10c Lower surface (slit closed side surface) 11 Slit 12 Bolt through-hole (through-hole) 13 Pin through-hole (through-hole) 20 Steel beam (non-joining part) 21 Joining plate 22 Bolt through-hole (through-hole) 23 Pin through-hole (through-hole) 32 Through-bolt (rod-shaped body) 33 Drift pin (rod-shaped body)

Claims

1. A joining plate fixed to a predetermined joining location is inserted into a slit formed at an end of a wooden structural member from the end face side of the wooden structural member. As a fixing portion for fixing the joining plate to the end of the wooden structural member by inserting a rod-shaped body through a through hole penetrating the end of the wooden structural member and the joining plate, a through bolt fastening portion formed by fastening a through bolt as the rod-shaped body to the through hole, and a drift pin penetration portion formed by penetrating a drift pin as the rod-shaped body into the through hole are provided. A wooden structural member joining structure, At the end of the wooden structural member, the slit is formed to be open only in two directions, namely, the end face of the wooden structural member and a slit open side face which is one side face adjacent to the end face. A wooden structural member joining structure in which, at the end of the wooden structural member, the through bolt fastening portion is arranged in a region adjacent to the slit open side face, and the drift pin penetration portion is arranged in another region.

2. The wooden structural member is a wooden beam provided on the ceiling side. The wooden structural member joining structure according to Claim 1, wherein at the end of the wooden beam, the slit is open only in two directions, namely, the end face and the upper surface of the wooden beam.

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