Joint reinforcement structure and joint reinforcement tool for wooden structural materials

Abstract

To prevent a wooden structural material from cracking due to a frame member fitted to the outer peripheral surface of the wooden structural material, to prevent the frame member from shifting out of position relative to the wooden structural material, reliably restrain the outer peripheral surface of the wooden structural material, prevent cracking failure of the wooden structural material, and maintain the joining strength between the wooden structural material and the structural material to be joined, since the frame member is attached to the outer peripheral surface of the wooden structural material with structural screws.SOLUTION: A drift pin DP is arranged perpendicular to the longitudinal direction of a wooden structural material W, a frame member F is fitted onto the outer peripheral surface of the wooden structural material, the frame member is fitted into a position close to an end face WK of the wooden structural material, and the frame member is secured to the outer peripheral surface of the wooden structural material with a structural screw B, which is arranged perpendicular to the axial direction of a drift pin DPN close to the end face of the wooden structural material.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a joint reinforcement structure and a joint reinforcement tool that joins a wooden structural member and a joined structural member of a wooden building using drift pins and joint metal fittings. [Background technology]

[0002] Conventionally, there have been 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 flints, and reinforcing members to various non-wood structural members such as similar wooden structural members, steel structural members in steel structures, and structural members in reinforced concrete structures. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6727615 [Patent Document 2] Patent No. 4809318 Summary of the Invention [Problem to be solved by the invention]

[0004] 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 structural member to be joined, and the connecting metal on the wooden structural member side and the connecting metal on the structural member to be joined are connected with a fastener, and the wooden structural member and the structural member to be joined are joined via both connecting metals, or the connecting metal of the wooden structural member is not used on the structural member to be joined, and the connecting metal of the wooden structural member is directly joined to the structural member to be joined. When large tensile and compressive loads are applied to the joint, the protruding parts of the drift pins protruding from both ends of the joining metal fittings 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 the end grain, resulting in the disadvantage that the splitting phenomenon can significantly reduce the joint strength between the wooden structural material and the joined structural material. [Means for solving the problem]

[0005] The present invention aims to solve such inconveniences, and among the present inventions, 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 drift pins and connecting hardware, 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, the frame member is fastened to the outer peripheral surface of the wooden structural material with structural screws, 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, and the structural screws are formed to a length dimension that can prevent splitting from the end surface of the wooden structural material caused by bending deformation of the drift pins.

[0006] The invention described in claim 2 is characterized in that the wooden structural material is formed in the shape of a square prism, and the frame member is formed in the shape of a square frame surrounding the four end faces of the wooden structural material as its outer surface.The invention described in claim 3 is characterized in that the wooden structural material is formed in the shape of a square prism, and the frame member is formed in the shape of a U-shaped frame surrounding three of the four end faces of the wooden structural material as its outer surface.

[0007] Furthermore, 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, excluding the head, is a male thread.

[0008] The invention described in claim 7 is a joining device for joining wooden structural materials and structural materials to be joined in a wooden building using drift pins and joining hardware, characterized in that the drift pins are arranged perpendicular to the longitudinal direction of the wooden structural material and 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 grain 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 grain surface of the wooden structural material, and the structural screws are formed to a length dimension that can prevent splitting from the end grain surface of the wooden structural material caused by bending deformation of the drift pins. [Effects of the Invention]

[0009] 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 hardware, the drift pins are arranged perpendicular to the longitudinal direction of the wooden structural members, a frame member is fitted onto the outer peripheral surface of the wooden structural members, the frame member is fitted into a position close to the end grain surface of the wooden structural members, and the frame member is fastened to the outer peripheral surface of the wooden structural members with structural screws, the structural screws are arranged perpendicular to the axial direction of the drift pins in a position close to the end grain surface of the wooden structural members, and the structural screws are formed to a length dimension that can prevent splitting of the wooden structural members from the end grain surface caused by bending deformation of the drift pins, and therefore splitting of the wooden structural members can be prevented by the frame member fitted into the outer peripheral surface of the wooden structural members, and the frame member is fastened to the outer peripheral surface of the wooden structural members with structural screws. The frame members are fitted close to the end face of the wooden structural member, which reliably prevents splitting from occurring at the end face of the wooden structural member. Furthermore, the frame members are fastened to the outer peripheral surface of the wooden structural member with structural screws, which prevents the frame members from shifting position relative to the wooden structural member and reliably holds the outer peripheral surface of the wooden structural member. In addition, the structural screws are arranged perpendicular to the axial direction of the drift pins located close to the end face of the wooden structural member, which keeps the clearance between the outer peripheral surface of the wooden structural member in the splitting direction and the inner surface of the frame member as small as possible. This reliably holds the outer peripheral surface of the wooden structural member and prevents splitting failure of the wooden structural member. This in turn maintains the strength of the connection between the wooden structural member and the structural member being joined, thereby simplifying and increasing the flexibility of architectural design and construction.

[0010] In addition, in the invention described in claim 2, the wooden structural material is formed in the shape of a square pillar, and the frame member is formed in the shape of a square frame that surrounds the four end faces of the wooden structural material as its outer surface. Therefore, the entire outer surface of the wooden structural material consisting of the four end faces of the wooden structural material can be surrounded, the outer surface of the wooden structural material can be securely restrained, and splitting failure of the wooden structural material can be reliably suppressed.

[0011] In addition, in the invention described in claim 3, the wooden structural material is formed in a square pillar 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 its outer surface. This makes it possible to suppress cracking and fracture of the wooden structural material, and ultimately to maintain the joining strength between the wooden structural material and the structural material to be joined, thereby simplifying and increasing the flexibility of architectural design and structure.

[0012] In addition, in the invention described in claim 4, the frame member is made of metal, so the outer surface of the wooden structural material can be kept restrained 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 surface of the wooden structural material can be kept restrained over time, improving the durability of the wooden structural material when used.

[0013] Furthermore, 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 male threaded, which improves the joining strength between the wooden structural material and the frame member, and also allows the structural screws to be screwed directly into the wooden structural material by rotating the bit of an electric tool or the like, without drilling pilot holes, further improving on-site workability. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a partial front view of a first embodiment of the present invention; [Figure 2] 1 is a partial side cross-sectional view of a first embodiment of the present invention; [Figure 3] 1 is a partial perspective view of a first embodiment of the present invention; [Figure 4] 1 is a partial perspective view of a first embodiment of the present invention; [Figure 5] 1 is a partial cross-sectional view of a first embodiment of the present invention; [Figure 6] 1 is a partially exploded perspective view of a first embodiment of the present invention; [Figure 7] 1 is a partially exploded perspective view of a first embodiment of the present invention; [Figure 8] 1 is a partial cross-sectional plan view of a first embodiment of the present invention; [Figure 9] 1 is a partial cross-sectional plan view of a first embodiment of the present invention; [Figure 10] FIG. 10 is a partial cross-sectional plan view of a second embodiment of the present invention. [Figure 11] FIG. 10 is a partial cross-sectional plan view of a second embodiment of the present invention. [Figure 12] FIG. 10 is a partial front view of a third embodiment of the present invention. [Figure 13] FIG. 10 is a partial cross-sectional side view of a third embodiment of the present invention. [Figure 14] FIG. 10 is a partial perspective view of a third embodiment of the present invention. [Figure 15] FIG. 10 is a partial cross-sectional plan view of a third embodiment of the present invention. [Figure 16] FIG. 10 is a partial cross-sectional plan view of a third embodiment of the present invention. [Figure 17] FIG. 10 is a partial front view of a fourth embodiment of the present invention. [Figure 18] FIG. 10 is a partial side view of a fourth embodiment of the present invention. [Figure 19] FIG. 10 is a partial perspective view of a fourth embodiment of the present invention. [Figure 20] FIG. 10 is a partial cross-sectional plan view of a fourth embodiment of the present invention. [Figure 21] FIG. 10 is a partial cross-sectional plan view of a fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] 1 to 21 show embodiments of the present invention, with FIGS. 1 to 9 showing a first embodiment, FIGS. 10 and 11 showing a second embodiment, FIGS. 12 to 16 showing a third embodiment, and FIGS. 17 to 21 showing a fourth embodiment.

[0016] In the first embodiment shown in Figs. 1 to 9, in a joining structure in which wooden structural members W·W of a wooden building are joined to joined structural members M using metal drift pins DP and joining hardware JW·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·W, and frame members F·F are fitted to the outer peripheral surfaces of the wooden structural members W·W. In this case, as shown in Fig. 7, the opposing frame members F Two pairs of through holes F1 are formed on the surface, for a total of four, and the frame members F·F are fitted into a position close to the end faces WK·WK of the wooden structural members W·W. The frame members F·F are fastened to the outer periphery of the wooden structural members W·W with structural screws B. In this case, as shown in Figures 2 and 4, the structural screws B are passed through one of the through holes F1 and fastened to the outer periphery of the wooden structural members W·W. The structural screws B are also threaded in the axial direction DP of the drift pins DP located close to the end faces WK·WK of the wooden structural members W·W. O The structural screws B are arranged perpendicular to the ends WK·WK of the wooden structural materials W·W, and the length of the structural screws B is such that they can prevent splitting from occurring at the end faces WK·WK of the wooden structural materials W·W due to bending deformation of the drift pins DP. In other words, in this case, since a plurality of drift pins DP are arranged as shown in Figs. 1 and 2, the "drift pin DP at a position closest to the end faces WK·WK" referred to here is the drift pin DP at a position closest to the end faces WK·WK of the plurality of drift pins DP··. N This refers to the following.

[0017] Here, the wooden structural material W is 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 braces, or reinforcing materials, and the joined structural material M is used as various joined structural materials M other than wood-based structural materials such as wooden structural materials similar to the wooden structural material W, steel structural materials in steel structures, and structural materials in reinforced concrete structures.

[0018] In this case, as shown in Figures 1 and 2, it is applied to the joining structure between two wooden structural members W·W, which are the vertical member V and diagonal member I of a wooden building, and the joined structural member M, which is the horizontal member.

[0019] In this case, as shown in Figure 6, the joint metal fittings JW·JW on the wooden structural members W·W side are made up of a base part 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 connected to the pipe hole WH of the wooden structural member W. T 1, 2, and 3, a connecting fitting JM is fixed to the joined structural material M, and the connecting fitting JM on the joined structural material M side has a structure consisting 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 (this "pin" also 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 connecting hole JM8, and a pin hole MH, and the joining hardware JW and the connecting fitting JM are connected by two fasteners C·C consisting of two bolts and nuts.

[0020] 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 fittings JW·JW on the wooden structural member W·W side, and a plurality of pin holes WH·· are formed in the wooden structural member W·W, and a plurality of drift pins DP·· are driven into the pin holes PH·· and WH·· in multiple stages, alternating in opposite directions and perpendicular to the longitudinal direction WL of the wooden structural member W·W.

[0021] As shown in Figures 2, 8, and 9, the frame members F·F are fitted to the wooden structural members W·W at positions close to the end faces WK·WK, and among the multiple drift pins DP··, the drift pin DP·· at the position close to the end faces WK·WK of the wooden structural members W·W is N Axial DP of O The structural screws B are arranged perpendicular to the frame members F·F and fasten them to the outer peripheral surfaces of the wooden structural members W·W.

[0022] In this case, as shown in Figures 1, 7 and 8, the two wooden structural members W·W are each formed in the shape of a rectangular pillar, and the frame members F·F are formed in the shape of a rectangular frame surrounding the four wood end faces WS·· that form the outer peripheral surfaces of the wooden structural members W·W.

[0023] 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.

[0024] 7 and 8, two of the structural screws B are arranged, with the two structural screws B·B being screwed in from opposite directions, or a plurality of the structural screws B are arranged, with at least two of the structural screws B·B being 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, with at least two of the four to six structural screws B·B being screwed in from opposite directions.

[0025] In this case, as shown in Figure 7, the structural screw B has a fully threaded structure in which the entire circumference of the shank 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, or hexagon, into which a bit of an electric tool or the like (not shown) can be fitted and removed, so that by rotating the bit of the electric tool or the like, the structural screw B··· can be directly screwed into the wooden structural material W without drilling a pilot hole.

[0026] 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·W of a wooden building are joined to joined structural members M using drift pins DP and joining hardware JW·JW, the drift pins DP are arranged perpendicular to the longitudinal direction WL of the wooden structural members W·W, frame members F·F are fitted to the outer peripheral surfaces of the wooden structural members W·W, and the frame members F·F are fitted to positions close to the end faces WK·WK of the wooden structural members W·W, and the frame members F·F are fastened to the outer peripheral surfaces of the wooden structural members W·W with structural screws B, and the structural screws B are fastened to the drift pins DP at positions close to the end faces WK·WK of the wooden structural members W·W. N Axial DP of Oand the structural screws B are formed to have a length that can prevent splitting of the wooden structural members W·W from the end faces WK·WK due to bending deformation of the drift pins DP. Therefore, splitting of the wooden structural members W·W can be prevented by the frame members F·F fitted to the outer peripheral surfaces of the wooden structural members W·W. Furthermore, because the frame members F·F are fitted to positions close to the end faces WK·WK of the wooden structural members W·W, splitting from the end faces WK·WK of the wooden structural members W·W where splitting begins can be reliably prevented. Furthermore, because the frame members F·F are fastened to the outer peripheral surfaces of the wooden structural members W·W with the structural screws B, displacement of the frame members F·F relative to the wooden structural members W·W can be prevented and the outer peripheral surfaces of the wooden structural members W·W can be reliably restrained. In addition, the structural screws B are fastened to the drift pins DP N Axial DP of O By arranging the wooden structural members W·W perpendicular to the frame members F·F, 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 surface 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 member M to be maintained, thereby simplifying and increasing the flexibility of architectural design and structure.

[0027] In this case, as shown in Figures 1, 7, and 8, the wooden structural members W·W are formed in the shape of a rectangular pillar, and the frame members F·F are formed in the shape of a rectangular frame surrounding the four wood end faces WS·· that form the outer periphery of the wooden structural members W·W. Therefore, the entire outer periphery consisting of the four wood end faces WS·· of the wooden structural members W·W can be surrounded, the outer periphery of the wooden structural members W·W can be securely restrained, and splitting fracture of the wooden structural members W·W can be reliably prevented. In this case, the frame members F are made of metal such as steel, alloy steel, or aluminum, so that the outer periphery of the wooden structural members W can be kept restrained over time, improving the durability of the wooden structural members W. In this case, by making the frame members F from a synthetic resin, the frame members F can be mass-produced, and the outer periphery of the wooden structural members W can be kept restrained over time, improving the durability of the wooden structural members W.

[0028] 7 and 8, two structural screws B are provided, and the two structural screws B·B are screwed in from opposite directions. This keeps the clearance between the opposing outer surfaces of the wooden structural members W·W in the splitting direction CK and the inner surfaces of the frame members F·F as small as possible, thereby preventing rattling and loosening due to gaps between the outer surfaces of the wooden structural members W·W and the inner surfaces of the frame members F·F. This in turn ensures that the outer surfaces of the wooden structural members W·W are securely restrained, preventing splitting failure of the wooden structural members W·W. This in turn improves the joining strength of the wooden structural members W·W against tensile, compressive and bending loads, maintaining the joining strength between the wooden structural members W·W and the joined structural member M, and thereby simplifies and enhances the flexibility of architectural design and construction.

[0029] In this case, as shown in Figure 7, the structural screw B has a fully threaded structure in which the entire circumference of the shank B2, excluding the head B1, is a male thread T, which improves the joining strength between the wooden structural material W·W and the frame members F·F.In addition, by rotating the bit of an electric tool, etc., the structural screw B can be passed through the through hole F1 of the frame members F·F and screwed directly into the wooden structural material W·W without drilling a pilot hole, further improving workability on site.

[0030] The second embodiment shown in Figs. 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 member W is formed in a square pillar shape, and the frame member F is formed in a U-frame shape that surrounds three of the four wood end faces WS·· that form the outer periphery of the wooden structural member W. The U-frame-shaped frame member F surrounds two of the four wood end faces WS·· that face in the splitting direction CK. T ·WS T The device is configured to restrain the

[0031] 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 restraint strength that prevents the unrestrained parts of the U-shaped frame member F from opening, it is possible to suppress splitting failure of the wooden structural material W, and ultimately to maintain the joining strength between the wooden structural material W and the structural material M to be joined. This in turn simplifies and increases the flexibility of the architectural design and structure, and provides the same effects as the first embodiment.

[0032] The third embodiment shown in Figures 12 to 16 also shows a different structure, and will be explained by assigning the same symbols to the same parts as in the first embodiment. 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.

[0033] In this case, as shown in Figures 12 and 13, the connecting hardware JW on the wooden structural material W side is constructed to consist of a base portion JW5, a connecting piece portion JW6, and a drift pin DP, and the fitting groove portion WG into which the connecting piece portion JW6 is inserted is formed extending in the longitudinal direction WL from the end grain surface WK of the wooden structural material W, while the structural material M to be joined is constructed 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 a nut.

[0034] 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··.

[0035] 12, 13, 15, and 16, a frame member F is fitted to the outer peripheral surface of the wooden structural material W, and the frame member F is fitted to a position close to the butt 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 with a structural screw B, and the structural screw B is fastened to the outer peripheral surface of the wooden structural material W in the axial direction DP of the drift pin DP close to the butt end surface WK of the wooden structural material W. O The structural screws B are arranged perpendicular to the ends WK, WK of the wooden structural materials W·W, and the length of the structural screws B is such that they can prevent splitting from occurring at the end grain faces WK·WK of the wooden structural materials W·W due to bending deformation of the drift pins DP. In other words, in this case, as shown in Figures 12 and 13, four drift pins DP are arranged, and therefore the "drift pins DP in a position closest to the end grain face WK" referred to here are the two drift pins DP in a position closest to the end grain face WK of these four drift pins DP··. N ·DP N This refers to the following.

[0036] 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 prevent the wooden structural material W from cracking. Furthermore, since the frame member F is fitted to a position close to the end grain surface WK of the wooden structural material W, cracking from the end grain surface WK of the wooden structural material W, where cracking starts, can be reliably prevented. Furthermore, since the frame member F is fastened to the outer peripheral surface of the wooden structural material W with 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 fastened to the drift pins DP N Axial DP of OThe structural screws B are arranged perpendicular to the end grain faces WK / WK of the wooden structural materials W / W, and the length of the structural screws B is such that they can prevent cracking from occurring at the end grain faces WK / WK of the wooden structural materials W / W due to the bending deformation of the drift pins DP. This makes it possible to keep as small as possible the clearance between the outer surface of the wooden structural material W in the cracking direction CK and the inner surface of the frame member F, thereby ensuring that the outer surface of the wooden structural material W can be securely restrained and preventing cracking failure of the wooden structural material W. This in turn makes it possible to maintain the joining strength between the wooden structural material W and the structural material M to be joined. This in turn simplifies and increases the versatility of architectural design and construction, and provides the same effects as the first embodiment.

[0037] The fourth embodiment shown in Figures 17 to 21 also shows a different structure, and will be explained by assigning the same symbols to the same parts as in the first embodiment. In this case, as shown in Figure 17, this is applied to a joining structure between two wooden structural members W·W, which are the vertical member V and diagonal member I of a wooden building, and a joined structural member M, which is a concrete foundation.

[0038] 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 similar to that of the third embodiment, consisting of a base portion JW5, a connecting piece portion JW6, an inclined plate portion JW7 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 member W. On the other hand, the structural member M to be joined is configured so that the base portion JW5 of the connecting metal fitting JW·JW on the wooden structural member 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 a nut.

[0039] 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.

[0040] 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 close to the end faces WK·WK of the wooden structural members W·W, and each frame member F·F is fastened to the outer peripheral surface of the wooden structural members W·W with a structural screw B, and the structural screw B is fastened to the outer peripheral surface of the wooden structural members W·W in the axial direction DP of the drift pin DP located close to the end faces WK·WK of the two wooden structural members W·W. O The structural screws B are arranged perpendicular to the ends WK and WK of the wooden structural members W·W, and the length of the structural screws B is such that they can prevent splitting from occurring at the end faces WK·WK of the wooden structural members W·W due to 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 members W·W, and therefore the "drift pins DP in positions closest to the end faces WK·WK" referred to here are the two drift pins DP in a row that are closest to the end faces WK of these four drift pins DP··. N ·DP N This refers to the following.

[0041] 17, 18, 20 and 21, in the joining of the wooden structural members W·W and the joined structural member M, the frame members F·F fitted to the outer periphery of the wooden structural members W·W can prevent the wooden structural members W·W from cracking. Furthermore, since the frame members F·F are fitted in positions close 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 begins, can be reliably prevented. Furthermore, since the frame members F·F are fastened to the outer periphery of the wooden structural members W·W with structural screws B, displacement of the frame members F·F relative to the wooden structural members W·W can be prevented, and the outer periphery of the wooden structural members W·W can be reliably restrained. In addition, the structural screws B are fastened to the drift pins DP N Axial DP of OThe structural screws B are arranged perpendicular to the end faces WK, WK of the wooden structural materials W·W, and are formed to a length that is capable of preventing splitting from occurring at the end faces WK, WK of the wooden structural materials W·W due to the bending deformation of the drift pins DP. This makes it possible to keep as small as possible the clearance between the outer surfaces of the wooden structural materials W·W in the splitting direction CK and the inner surfaces of each frame member F·F, thereby enabling the outer surfaces of the wooden structural materials W·W to be securely restrained and preventing splitting failure of the wooden structural materials W·W. This in turn maintains the joining strength between the wooden structural materials W·W and the structural material M to be joined. This in turn simplifies and increases the flexibility of architectural design and structure, and provides the same effects as the first embodiment.

[0042] The present invention is not limited to the above-described embodiment, and the wooden structural material W, the joined structural material M, and the structure of the structural screws B may be appropriately modified and designed.

[0043] As described above, the intended purpose can be fully achieved. [Explanation of symbols]

[0044] W Wooden structural material WL Longitudinal WK End grain WS wood end face M Structural material to be joined JW Joint Metal F Frame member T male thread B Structural screws B1 head B2 shaft part DP Drift Pin DP N Drift Pin DP O Axial direction

Claims

1. 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 connecting hardware, characterized in that the drift pins are arranged perpendicular to the longitudinal direction of the wooden structural materials, a frame member is fitted onto the outer peripheral surface of the wooden structural materials, the frame member is fitted into a position close to the end grain surface of the wooden structural materials, and the frame member is fastened to the outer peripheral surface of the wooden structural materials with structural screws, the structural screws are arranged perpendicular to the axial direction of the drift pins in a position close to the end grain surface of the wooden structural materials, and the structural screws are formed to a length dimension that can prevent splitting from the end grain surface of the wooden structural materials caused by bending deformation of the drift pins.

2. The joint reinforcement structure of a wooden structural material as described in claim 1, characterized in that the wooden structural material is formed in a rectangular prism shape, and the frame member is formed in a rectangular frame shape surrounding four wood end faces as the outer peripheral surface of the wooden structural material.

3. The wooden structural member is formed in a rectangular prism shape, and the frame member is formed in a U-shaped frame shape that surrounds three of the four wood end faces that form the outer peripheral surface of the wooden structural member.

4. 2. The joint reinforcement structure for wooden structural members according to claim 1, wherein the frame members are made of metal.

5. 2. The joint reinforcement structure for wooden structural members according to claim 1, wherein said frame members are made of synthetic resin.

6. 2. The joint reinforcement structure for wooden structural members according to claim 1, wherein the structural screw has a fully threaded structure in which the entire circumference of the shaft, excluding the head, is a male thread.

7. A connecting device for connecting wooden structural materials and structural materials to be joined in a wooden building using drift pins and connecting hardware, characterized in that the drift pins are arranged perpendicular to the longitudinal direction of the wooden structural material and 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 grain 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 grain surface of the wooden structural material, and the structural screws are formed to a length dimension that can prevent splitting from the end grain surface of the wooden structural material caused by bending deformation of the drift pin.

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