JP7654722B2 - Reinforcement structure and joint reinforcement for wooden structural members - Google Patents

Description

The present invention relates to a joint reinforcement structure and joint reinforcement device that uses drift pins and joint metal fittings to join wooden structural members and joined structural members of wooden buildings.

Conventionally, there are known joining structures that use drift pins and joining hardware to join wooden structural members, such as vertical members such as pillars, studs, and beams in wooden buildings, horizontal members such as beams and girders, diagonal members such as braces and firestops, and reinforcing members, to various non-wood-based joined structural members, such as similar wooden structural members, steel structural members in steel structures, and structural members in reinforced concrete structures.

Patent No. 6727615 Patent No. 4809318

However, in the case of the above-mentioned conventional structure, for example, the connecting metal is fixed to the wooden structural member using a drift pin, and the connecting metal is also fixed to the joined structural member, and the connecting metal on the wooden structural member side and the connecting metal on the joined structural member side are connected with a fastener, and the wooden structural member and the joined structural member are joined via both connecting metals, or no connecting metal is used on the joined structural member side, and the connecting metal of the wooden structural member is directly joined to the joined structural member. In this case, the connection between the wooden structural member and the joined structural member is When a large tensile or compressive load is applied to the joint, the protruding parts of the drift pins that protrude from both ends of the joint metal bend in the longitudinal direction of the wooden structural material, and the bending deformation of the protruding parts of the drift pins generates a force that pushes the wooden structural material apart from the inside. This excessive pushing force can cause the wooden structural material to split into two at its end, resulting in a splitting phenomenon, which can cause a significant decrease in the joint strength between the wooden structural material and the structural material being joined.

The present invention aims to solve such inconveniences, and among the present invention, the invention described in claim 1 relates to a joint reinforcement structure for wooden structural materials, in which a wooden structural material of a wooden building is joined to a structural material to be joined using a drift pin and a joining metal fitting, the drift pin is arranged perpendicular to the longitudinal direction of the wooden structural material, a frame member is fitted onto the outer peripheral surface of the wooden structural material, the frame member is fitted into a position close to the end surface of the wooden structural material, and the frame member is fastened to the outer peripheral surface of the wooden structural material by a structural screw , the structural screw is arranged perpendicular to the axial direction of the drift pin in a position close to the end surface of the wooden structural material, the structural screw is formed to a length dimension capable of suppressing cracking from the end surface of the wooden structural material caused by bending deformation of the drift pin, a plurality of the structural screws are arranged, and of the plurality of structural screws, at least two structural screws are screwed in from opposite directions to each other .

The invention described in claim 2 is characterized in that the wooden structural material is formed in a square prism shape, and the frame member is formed in a square frame shape that surrounds the four end faces of the wooden structural material as the outer periphery, and the invention described in claim 3 is characterized in that the wooden structural material is formed in a square prism shape, and the frame member is formed in a U-shaped frame shape that surrounds three of the four end faces of the wooden structural material as the outer periphery.

The invention described in claim 4 is characterized in that the frame member is made of metal, the invention described in claim 5 is characterized in that the frame member is made of synthetic resin, and the invention described in claim 6 is characterized in that the structural screw has a fully threaded structure in which the entire circumference of the shaft except for the head is a male thread.

The invention described in claim 7 relates to a joining device for joining wooden structural materials and joined structural materials of a wooden building using drift pins and joining metal fittings, characterized in that the drift pins are arranged perpendicular to the longitudinal direction of the wooden structural material, and the device comprises a frame member fitted onto the outer peripheral surface of the wooden structural material and structural screws for fastening the frame member to the outer peripheral surface of the wooden structural material, the frame member is fitted into a position close to the end surface of the wooden structural material, the structural screws are arranged perpendicular to the axial direction of the drift pins in a position close to the end surface of the wooden structural material, the structural screws are formed to a length dimension capable of suppressing cracking from the end surface of the wooden structural material caused by bending deformation of the drift pin, and a plurality of the structural screws are arranged, and at least two of the plurality of structural screws are screwed in from opposite directions to each other .

As described above, in the inventions of claims 1 and 7 , in a joining structure for joining wooden structural members of a wooden building to structural members to be joined using drift pins and joining metal fittings, the drift pins are arranged perpendicular to the longitudinal direction of the wooden structural members, a frame member is fitted to the outer peripheral surface of the wooden structural members, the frame member is fitted to a position adjacent to the end surface of the wooden structural members, the frame member is fastened to the outer peripheral surface of the wooden structural members by structural screws, the structural screws are arranged perpendicular to the axial direction of the drift pins at a position adjacent to the end surface of the wooden structural members , and the structural screws are used to prevent bending deformation of the drift pins. The frame members are formed to have a length dimension that can prevent cracking from the end surface of the wooden structural material , and therefore cracking of the wooden structural material can be prevented by the frame members fitted to the outer peripheral surface of the wooden structural material, and because the frame members are fitted to a position close to the end surface of the wooden structural material, cracking from the end surface of the wooden structural material, where cracking begins, can be reliably prevented. Furthermore, because the frame members are fastened to the outer peripheral surface of the wooden structural material with structural screws, it is possible to prevent the frame members from shifting in position relative to the wooden structural material and reliably restrain the outer peripheral surface of the wooden structural material. In addition, the structural screws are fastened to the outer peripheral surface of the wooden structural material. By arranging the drift pins perpendicular to the axial direction of the drift pins located close to the end grain surface, the clearance between the outer peripheral surface of the wooden structural material in the splitting direction and the inner surface of the frame member can be kept as small as possible, and the outer peripheral surface of the wooden structural material can be securely restrained, and splitting failure of the wooden structural material can be suppressed. In addition, the joining strength between the wooden structural material and the joined structural material can be maintained, and the architectural design and construction can be simplified and made more flexible . Furthermore, a plurality of the structural screws are arranged, and at least two of the plurality of structural screws are screwed in from opposite directions. This makes it possible to keep the clearance as small as possible between the opposing outer surfaces of the wooden structural materials in the splitting direction and the inner surface of the frame members, thereby suppressing rattling and loosening due to gaps between the outer surfaces of the wooden structural materials and the inner surfaces of the frame members. This in turn makes it possible to reliably restrain the outer surfaces of the wooden structural materials and suppress splitting failure of the wooden structural materials. As a result, it is possible to improve the joining strength against tensile loads, compressive loads and bending loads applied to the wooden structural materials, and maintain the joining strength between the wooden structural materials and the structural materials to be joined, thereby simplifying and enhancing the versatility of architectural design and construction .

In addition, in the invention described in claim 2, the wooden structural material is formed in a square prism shape, and the frame member is formed in a square frame shape that surrounds the four end faces of the wooden structural material, which constitute the outer periphery of the wooden structural material. This means that the entire outer periphery consisting of the four end faces of the wooden structural material can be surrounded, the outer periphery of the wooden structural material can be securely restrained, and splitting failure of the wooden structural material can be reliably suppressed.

In addition, in the invention described in claim 3, the wooden structural material is formed in a square prism shape, and the frame member is formed in a U-shaped frame shape that surrounds three of the four end faces of the wooden structural material, which is the outer peripheral surface of the wooden structural material. This makes it possible to suppress cracking and fracture of the wooden structural material, and ultimately to maintain the joint strength between the wooden structural material and the structural material to be joined, thereby simplifying and increasing the versatility of architectural design and construction.

In addition, in the invention described in claim 4, the frame member is made of metal, so the outer peripheral surface of the wooden structural material can be restrained and maintained over time, improving the durability of the wooden structural material when used.In addition, in the invention described in claim 5, the frame member is made of synthetic resin, so the frame member can be mass-produced and the outer peripheral surface of the wooden structural material can be restrained and maintained over time, improving the durability of the wooden structural material when used.

In addition, in the invention described in claim 6 , the structural screws have a fully threaded structure in which the entire circumference of the shaft excluding the head is a male thread, thereby improving the joining strength between the wooden structural material and the frame member. In addition, the structural screws can be directly screwed into the wooden structural material by rotating a bit of an electric tool or the like without drilling pilot holes, further improving on-site workability.

1 is a partial front view of a first embodiment of the present invention; 1 is a partial cross-sectional side view of a first embodiment of the present invention; 1 is a partial perspective view of a first embodiment of the present invention; 1 is a partial perspective view of a first embodiment of the present invention; 1 is a partial cross-sectional view of a first embodiment of the present invention; FIG. 1 is a partially exploded perspective view of a first embodiment of the present invention. FIG. 1 is a partially exploded perspective view of a first embodiment of the present invention. 1 is a partial cross-sectional plan view of a first embodiment of the present invention; 1 is a partial cross-sectional plan view of a first embodiment of the present invention; FIG. 4 is a partial cross-sectional plan view of a second embodiment of the present invention. FIG. 4 is a partial cross-sectional plan view of a second embodiment of the present invention. FIG. 11 is a partial front view of a third embodiment of the present invention. FIG. 11 is a partial cross-sectional side view of a third embodiment of the present invention. FIG. 11 is a partial perspective view of a third embodiment of the present invention. FIG. 11 is a partial cross-sectional plan view of a third embodiment of the present invention. FIG. 11 is a partial cross-sectional plan view of a third embodiment of the present invention. FIG. 13 is a partial front view of a fourth embodiment of the present invention. FIG. 11 is a partial side view of a fourth embodiment of the present invention. FIG. 11 is a partial perspective view of a fourth embodiment of the present invention. FIG. 11 is a partial cross-sectional plan view of a fourth embodiment of the present invention. FIG. 11 is a partial cross-sectional plan view of a fourth embodiment of the present invention.

Figures 1 to 21 show examples of embodiments of the present invention, with Figures 1 to 9 showing a first embodiment, Figures 10 and 11 showing a second embodiment, Figures 12 to 16 showing a third embodiment, and Figures 17 to 21 showing a fourth embodiment.

In the first embodiment shown in Figs. 1 to 9, in a joining structure in which wooden structural members W and W of a wooden building are joined to structural members M to be joined using metal drift pins DP and joining metal fittings JW and JW, as shown in Figs. 1, 2, 5, 7, 8 and 9 , the drift pins DP are arranged perpendicular to the longitudinal direction WL of the wooden structural members W and W, and frame members F and F are fitted to the outer peripheral surfaces of the wooden structural members W and W. In this case, as shown in Fig. 7, two pairs of through holes _F1 are formed on the opposing surfaces of the frame member F for a total of four, and the frame members F and F are fitted to positions adjacent to the ends WK and WK of the wooden structural members W and W. The frame members F and F are fastened to the outer peripheral surfaces of the wooden structural members W and W by structural screws B, and in this case, as shown in Figs. 2 and 4, the structural screws B are inserted into any of the through holes F. ₁ and is attached to the outer peripheral surface of the wooden structural material W.W, and the structural screw B is arranged perpendicular to the axial direction _DP0 of the drift pin DP located close to the end faces WK.WK of the wooden structural material W.W, and the structural screw B is formed with a length dimension capable of suppressing splitting at the end faces WK.WK of the wooden structural material W.W caused by bending deformation of the drift pin DP. In other words, in this case, since a plurality of drift pins DP are arranged as shown in Figures 1 and 2, the "drift pin DP located close to the end faces WK.WK" here refers to the drift pin _DPN located closest to the end faces WK.WK of the plurality of drift pins DP.

The wooden structural members W are used, for example, as vertical members V such as pillars, studs, and beams in wooden buildings, horizontal members such as beams and girders, diagonal members I such as braces and firestops, or reinforcing members, and the joined structural members M are used as various joined structural members M other than wood-based structural members, such as wooden structural members similar to the wooden structural members W, steel structural members in steel structures, and structural members in reinforced concrete structures.

In this case, as shown in Figures 1 and 2, it is applied to the joining structure between two wooden structural members W and W, which serve as the vertical member V and diagonal member I of a wooden building, and the joined structural member M, which serves as a horizontal member.

In this case, as shown in FIG. 6, the joint metal fittings JW/JW on the wooden structural members W/W side are made up of a base portion _JW1 , a pair of joint pieces _JW2 / _JW2 , a pipe fitting _JW3 , a connecting hole _JW4 and a drift pin DP. The pipe fitting _JW3 is inserted into the pipe hole WH- _T of the wooden structural member W. Meanwhile, as shown in FIGS. 1, 2 and 3, a connecting fitting JM is fixed to the joined structural member M. The connecting fitting JM on the joined structural member M side is made up of a base portion _JM1 , a pair of suspension cylinder portions _JM2 / _JM2 , a connecting shaft _JM5 connected to the suspension cylinder portions _JM2 / _JM2 , a suspension plate portion _JM3 , a pin _JM4, and a (This "pin" includes pins similar to the drift pin DP described above, but is simply called a "pin" to distinguish it from the drift pin DP.) A structure consisting of a connecting hole _JM8 and a pin hole MH is used, and the joining hardware JW and the connecting hardware JM are connected by two fasteners C.C., which consist of two bolts and nuts.

In this case, as shown in Figures 1, 4 and 6, a plurality of pin holes PH... are formed in the pipe fittings _JW3 /JW3 of the two connecting metal fittings JW/ _JW on the wooden structural material W/W side, a plurality of pin holes WH... are formed in the wooden structural material W/W, and a plurality of drift pins DP... are driven into the pin holes PH... and WH... in multiple stages, alternately in opposite directions and perpendicular to the longitudinal direction WL of the wooden structural material W/W.

As shown in Figures 2, 8 and 9, frame members F.F are fitted into a position close to the end faces WK.WK of the wooden structural materials W.W, and the frame members F.F are secured to the outer peripheral surfaces of the wooden structural materials W.W by the structural screws B, so that the axial direction _DP0 of the drift pin DP _N, which is located close to the end faces WK.WK of the wooden structural materials W.W, is perpendicular to the axial direction DP0 of the drift pin DP N, which is located close to the end faces WK.WK of the wooden structural materials W.W.

In this case, as shown in Figures 1, 7, and 8, the two wooden structural members W and W are each formed into a rectangular column shape, and the frame members F and F are formed into a rectangular frame shape that surrounds the four wood end faces WS... that form the outer periphery of the wooden structural members W and W.

In this case, the frame member F is made of metal such as steel, alloy steel, or aluminum, and may also be made of synthetic resin such as synthetic resin or fiber-reinforced resin.

In this case, as shown in Figures 7 and 8, two structural screws B are arranged, and the two structural screws B.B are screwed in from opposite directions. Alternatively, a plurality of structural screws B may be arranged, and of the plurality of structural screws B..., at least two structural screws B.B are screwed in from opposite directions. For example, depending on the size of the wooden structural material W, four to six structural screws B may be arranged, and of the four to six structural screws B..., at least two structural screws B.B are screwed in from opposite directions.

In this case, as shown in FIG. 7, the structural screw B has a fully threaded structure in which the entire circumference of the shaft _B2 , excluding the head _B1 , is a male thread T, and the head _B1 is formed with a groove recess _B3 such as a cross groove, hexagonal groove, hexagon, etc. into which a bit of an electric tool or the like (not shown) can be fitted and removed, so that the structural screw B can be directly screwed into the wooden structural material W by rotating the bit of the electric tool or the like without drilling a pilot hole.

Since this first embodiment has the above-mentioned configuration, as shown in Figures 1, 2, 5, 7, 8 and 9 , in a joining structure in which wooden structural members W and W of a wooden building are joined to joined structural members M using drift pins DP and joining metal fittings JW and JW, the drift pins DP are arranged perpendicular to the longitudinal direction WL of the wooden structural members W and W, frame members F and F are fitted to the outer peripheral surfaces of the wooden structural members W and W, and the frame members F and F are fitted to positions adjacent to the end faces WK and WK of the wooden structural members W and W, and the frame members F and F are fastened to the outer peripheral surfaces of the wooden structural members W and W by structural screws B, and the structural screws B are fastened to the outer peripheral surfaces of the wooden structural members W and W by structural screws B in the axial direction DP of the drift pins DP _N at positions adjacent to the end faces WK and WK of the wooden structural members W and W. The structural screws B are arranged perpendicular to the drift pins DP and are formed to have a length dimension capable of suppressing splitting from the end faces WK, WK of the wooden structural materials W, W caused by bending deformation of the drift pins DP. Therefore, splitting of the wooden structural materials W, W can be suppressed _by the frame members F, F fitted to the outer peripheral surfaces of the wooden structural materials W, W. Furthermore, since the frame members F, F are fitted to positions adjacent to the end faces WK, WK of the wooden structural materials W, W, splitting from the end faces WK, WK of the wooden structural materials W, W where splitting starts can be reliably suppressed. Furthermore, since the frame members F, F are fastened to the outer peripheral surfaces of the wooden structural materials W, W by the structural screws B, it is possible to prevent the frame members F, F from shifting in position relative to the wooden structural materials W, W, and reliably restrain the outer peripheral surfaces of the wooden structural materials W, W. In addition, the structural screws B are fastened to the drift pins DP at positions adjacent to the end faces WK, WK of the wooden structural materials W, W. By being arranged perpendicular to the axial direction _DP0 of the frame members _N , the clearance between the outer surface of the wooden structural members W/W in the splitting direction CK and the inner surface of the frame members F/F can be kept as small as possible, which allows the outer surfaces of the wooden structural members W/W to be securely restrained and suppresses splitting failure of the wooden structural members W/W. This in turn allows the joining strength between the wooden structural members W/W and the joined structural members M to be maintained, thereby simplifying and increasing the versatility of the architectural design and structure.

In this case, as shown in Figs. 1, 7 and 8, the wooden structural members W and W are formed in a rectangular column shape, and the frame members F and F are formed in a rectangular frame shape surrounding the four wood end faces WS... of the wooden structural members W and W, so that the entire outer peripheral surface consisting of the four wood end faces WS... of the wooden structural members W and W can be surrounded, the outer peripheral surface of the wooden structural members W and W can be securely restrained, and the splitting fracture of the wooden structural members W and W can be securely suppressed. In this case, the frame members F are made of metal such as steel, alloy steel, or aluminum, so that the outer peripheral surface of the wooden structural members W can be restrained and maintained over time, and the durability of the wooden structural members W can be improved. In this case, by making the frame members F out of synthetic resin, the frame members F can be mass-produced, and the outer peripheral surface of the wooden structural members W can be restrained and maintained over time, and the durability of the wooden structural members W can be improved.

In this case, as shown in Figures 7 and 8, two structural screws B are arranged, and the two structural screws B are screwed in from opposite directions. This keeps the clearance between the opposing outer surfaces of the wooden structural members W and W in the splitting direction CK and the inner surface of the frame members F and F as small as possible, suppressing rattling and loosening caused by gaps between the outer surfaces of the wooden structural members W and W and the inner surface of the frame members F and F. This allows the outer surfaces of the wooden structural members W and W to be securely restrained, suppressing splitting failure of the wooden structural members W and W, and ultimately improving the joint strength against tensile, compressive and bending loads applied to the wooden structural members W and W, maintaining the joint strength between the wooden structural members W and W and the joined structural member M, and thus simplifying and enhancing the flexibility of architectural design and construction.

In this case, as shown in Figure 7, the structural screw B has a fully threaded structure in which the entire circumference of the shaft _B2 , excluding the head _B1 , is a male thread T, which improves the joining strength between the wooden structural materials W/W and the frame members F/F. In addition, by rotating a bit of an electric tool or the like, the structural screw B can be passed through the through hole _F1 of the frame members F/F and directly screwed into the wooden structural materials W/W without drilling pilot holes, further improving on-site workability.

The second embodiment shown in Figures 10 and 11 shows a different structure, and will be described by assigning the same reference numerals to the same parts as in the first embodiment. In this case, only the structure of the frame member F differs from that of the first embodiment. That is, the wooden structural material W is formed in a rectangular prism shape, the frame member F is formed in a U-shaped frame shape surrounding three end faces WS... of the four end faces WS... that form the outer peripheral surface of the wooden structural material W, and the U-shaped frame member F is configured to restrain two end faces WS _-T , WS- _T that face the splitting direction CK of the four end faces WS... that form the outer peripheral surface of the wooden structural material W.

Even in this second embodiment, the wooden structural material W is formed in a rectangular prism shape, and the frame member F is formed in a U-shaped frame shape that surrounds three of the four wood end faces WS... that form the outer periphery of the wooden structural material W. Therefore, by considering the restraining strength that prevents the opening of the unrestrained parts of the U-shaped frame member F, it is possible to suppress cracking failure of the wooden structural material W, and by extension, to maintain the joining strength between the wooden structural material W and the joined structural material M, which in turn simplifies and increases the versatility of architectural design and structure, and provides the same effects as the first embodiment.

The third embodiment shown in Figures 12 to 16 also shows a different structure, and the same parts as in the first embodiment are given the same reference numerals. In this case, as shown in Figure 12, it is applied to a joining structure between a wooden structural member W, which is a vertical member V of a wooden building, and a joined structural member M, which is a horizontal member.

In this case, as shown in Figures 12 and 13, the connecting hardware JW on the wooden structural material W side has a structure consisting of a base portion _JW5 , a connecting piece portion _JW6 and a drift pin DP, and the insertion groove portion WG into which the connecting piece portion _JW6 is inserted is formed extending in the longitudinal direction WL from the end face WK of the wooden structural material W, while the joined structural material M is configured so that the base portion _JW5 of the connecting hardware JW on the wooden structural material W side is directly connected by a base portion _JM6 and a pair of fasteners C.C consisting of two bolts and nuts.

In this case, as shown in Figures 12 and 14, four pin holes PH... are formed in the joint piece portion _JW6 of the joint metal fitting JW on the wooden structural material W side, and four pin holes WH... are formed in the wooden structural material W, and four drift pins DP... are driven into the pin holes PH... and pin holes WH....

12, 13, 15, and 16, a frame member F is fitted to the outer peripheral surface of a wooden structural material W, the frame member F is fitted to a position adjacent to the end surface WK of the wooden structural material W, the frame member F is fastened to the outer peripheral surface of the wooden structural material W by structural screws B, and the structural screws B are fixed to the outer peripheral surface of the wooden structural material W by the axial direction DP of the drift pin DP located adjacent to the end surface WK of the wooden structural material W. _O , and the structural screws B are formed to a length dimension capable of preventing splitting at the end faces WK, WK of the wooden structural materials W, W caused by the bending deformation of the drift pins DP.In other words , in this case, since four drift pins DP are arranged as shown in Figures 12 and 13, the "drift pin DP in a position closest to the end face WK" here refers to the two drift pins _DPN , _DPN that are arranged side by side at a position closest to the end face WK of these four drift pins DP.

12, 13 , 15, and 16 , in the joining of the wooden structural material W and the joined structural material M, the frame member F fitted to the outer peripheral surface of the wooden structural material W can suppress cracking of the wooden structural material W, and since the frame member F is fitted to a position adjacent to the end surface WK of the wooden structural material W, cracking from the end surface WK of the wooden structural material W where cracking starts can be reliably suppressed. Furthermore, since the frame member F is fastened to the outer peripheral surface of the wooden structural material W by the structural screws B, it is possible to prevent the frame member F from shifting in position relative to the wooden structural material W, and the outer peripheral surface of the wooden structural material W can be reliably restrained. In addition, the structural screws B are fixed to the outer peripheral surface of the wooden structural material W by the axial direction DP of the drift pin DP _N located adjacent to the end surface WK of the wooden structural material W. _O , and the structural screws B are formed to a length dimension which is capable of preventing cracking from the end faces WK, WK of the wooden structural materials W, W caused by the bending deformation of the drift pins DP. This makes it possible to keep as small as possible the clearance between the outer peripheral surface of the wooden structural material W in the cracking direction CK and the inner surface of the frame member F. This in turn makes it possible to reliably restrain the outer peripheral surface of the wooden structural material W and prevent cracking failure of the wooden structural material W. It is also possible to maintain the joining strength between the wooden structural material W and the joined structural material M. This in turn makes it possible to simplify and increase the versatility of the architectural design and structure, and to obtain the same effects as the first embodiment described above.

The fourth embodiment shown in Figures 17 to 21 also shows a different structure, and will be explained by assigning the same reference numerals to the same parts as in the first embodiment. In this case, as shown in Figure 17, it is applied to a joining structure between two wooden structural members W and W, which are vertical members V and diagonal members I of a wooden building, and a joined structural member M, which is a concrete foundation.

In this case, as shown in Figures 17 and 18, each of the connecting metal fittings JW/JW on the two wooden structural members W/W has a structure consisting of a base portion _JW5 , a connecting piece portion _JW6 , an inclined plate portion _JW7 and a drift pin DP similar to that of the third embodiment described above, and the insertion groove portion WG into which the connecting piece portion _JW6 is inserted is formed extending in the longitudinal direction WL from the end face WK of the wooden structural member W, while the joined structural member M is configured so that the base portion JW5 of the connecting metal fittings JW/ _JW on the wooden structural members W/W side is directly connected by a connecting frame portion _JM9 , a base portion _JM7 and a pair of fasteners C/C consisting of two bolts and nuts.

In this case, as shown in Figures 17 and 19, four pin holes PH... are formed in each of the joint pieces _JW6 /JW6 of the joint metal fittings JW/ _JW on the two wooden structural members W/W, and four pin holes WH... are formed in each of the wooden structural members W/W, so that four drift pins DP... are driven into the pin holes PH... and pin holes WH..., respectively.

As in the first embodiment, as shown in Figures 17, 18, 20 and 21, frame members F, F are fitted to the outer peripheral surfaces of the two wooden structural members W, W, respectively, and each frame member F, F is fitted to a position adjacent to the end faces WK, WK of the wooden structural members W, W. Each frame member F, F is fastened to the outer peripheral surface of the wooden structural members W, W by a structural screw B, and the structural screw B is fixed to the outer peripheral surface of the wooden structural members W, W by a structural screw B in the axial direction DP of the drift pin DP located adjacent to the end faces WK, WK of the two wooden structural members W, W. _O , and the structural screws B are formed to a length dimension capable of preventing splitting at the end faces WK, WK of the wooden structural materials W, W caused by the bending deformation of the drift pins DP. In other words , in this case, as shown in Figures 17 and 18, four drift pins DP are arranged on each of the two wooden structural materials W, W, so the "drift pins DP in a position closest to the end faces WK, WK" here refers to the two drift pins _DPN , _DPN that are arranged side by side at a position closest to the end faces WK of these four drift pins DP.

17, 18 , 20 and 21 , in the joining of the wooden structural members W, W and the joined structural members M, the frame members F, F fitted to the outer peripheral surfaces of the wooden structural members W, W can suppress cracking of the wooden structural members W, W. Furthermore, since the frame members F, F are fitted to positions adjacent to the end faces WK, WK of the wooden structural members W, W, cracking from the end faces WK, WK of the wooden structural members W, W where cracking starts can be reliably suppressed. Furthermore, since the frame members F, F are fastened to the outer peripheral surfaces of the wooden structural members W, W with the structural screws B, it is possible to prevent the frame members F, F from shifting in position relative to the wooden structural members W, W, and reliably restrain the outer peripheral surfaces of the wooden structural members W, W. In addition, the structural screws B are fastened to the axial direction DP of the drift pins DP _N positioned adjacent to the end faces WK, WK of the wooden structural members W, W. _O , and the structural screws B are formed to a length dimension which is capable of preventing cracking of the end faces WK, WK of the wooden structural materials W, W caused by the bending deformation of the drift pins DP. This makes it possible to keep as small as possible the clearance between the outer peripheral surface of the wooden structural materials W, W in the cracking direction CK and the inner surface of each frame member F, F. This allows the outer peripheral surfaces of the wooden structural materials W, W to be securely restrained and prevents cracking of the wooden structural materials W, W. Ultimately, the joining strength between the wooden structural materials W, W and the joined structural materials M can be maintained, which in turn allows for simplification and versatility of the architectural design and structure, and provides the same effects as the first embodiment described above.

The present invention is not limited to the above embodiment, and the structure of the wooden structural material W, the joined structural material M, and the structural screws B can be modified and designed as appropriate.

The above fully achieves the intended purpose.

W Wooden structural material WL Longitudinal direction WK End surface WS End surface M Structural material to be joined JW Joining metal fitting F Frame member T Male screw B Structural screw B ₁ head B ₂ shaft DP Drift pin DP _N Drift pin DP _O Axial direction

Claims (7)

A joint reinforcement structure for wooden structural materials, in which wooden structural materials of a wooden building are joined to structural materials to be joined using drift pins and joining metal fittings, characterized in that the drift pins are arranged perpendicular to the longitudinal direction of the wooden structural material, a frame member is fitted onto the outer peripheral surface of the wooden structural material, the frame member is fitted into a position close to the end surface of the wooden structural material, and the frame member is secured to the outer peripheral surface of the wooden structural material with structural screws , the structural screws being arranged perpendicular to the axial direction of the drift pin in a position close to the end surface of the wooden structural material, the structural screws being formed to a length dimension capable of suppressing cracking from the end surface of the wooden structural material caused by bending deformation of the drift pin, and a plurality of the structural screws are arranged, and of the plurality of structural screws, at least two structural screws are screwed in from opposite directions to each other . The joint reinforcement structure of a wooden structural member according to claim 1, characterized in that the wooden structural member is formed in a rectangular column shape, and the frame member is formed in a rectangular frame shape surrounding the four end faces of the wooden structural member as the outer peripheral surface. The joint reinforcement structure of a wooden structural material according to claim 1, characterized in that the wooden structural material is formed in a rectangular column shape, and the frame member is formed in a U-shaped frame shape that surrounds three of the four end faces of the wooden structural material as the outer peripheral surface. The joint reinforcement structure for wooden structural materials according to claim 1, characterized in that the frame members are made of metal. The joint reinforcement structure for wooden structural materials according to claim 1, characterized in that the frame members are made of synthetic resin. The joint reinforcement structure for wooden structural materials according to claim 1, characterized in that the structural screw has a fully threaded structure in which the entire circumference of the shaft, excluding the head, is a male thread. A joint reinforcement for wooden structural materials for joining wooden structural materials and joined structural materials of a wooden building using drift pins and joining metal fittings, characterized in that the drift pins are arranged perpendicular to the longitudinal direction of the wooden structural material, and the drift pins comprise a frame member that is fitted onto the outer peripheral surface of the wooden structural material, and structural screws that secure the frame member to the outer peripheral surface of the wooden structural material, the frame member is fitted into a position close to the end surface of the wooden structural material, the structural screws are arranged perpendicular to the axial direction of the drift pins in a position close to the end surface of the wooden structural material, the structural screws are formed to a length dimension that can suppress cracking from the end surface of the wooden structural material caused by bending deformation of the drift pin, and a plurality of the structural screws are arranged, and at least two of the plurality of structural screws are screwed in from opposite directions to each other .