Joint reinforcement structure and joint reinforcement tool for wooden structural material

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 device that joins a wooden structural member and a joined structural member of a wooden building using a drift pin and a joint metal fitting. [Background technology]

[0002] Conventionally, there has been known a joining structure that uses 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. [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 also 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 large tensile and compressive loads are applied to the joint, the protruding portions of the drift pins protruding from both ends of the joining metal bend in the longitudinal direction of the wooden structural material, and the bending deformation of the protruding portions 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, a splitting phenomenon, and the occurrence of the splitting phenomenon can have the disadvantage of significantly reducing the joining 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 joining structure in which wooden structural materials of a wooden building are joined to joined structural materials using drift pins and joining metal fittings, the drift pins are arranged perpendicular to the longitudinal direction of the wooden structural material, a frame member is fitted into 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 by 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 capable of suppressing cracking 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 into a rectangular prism shape, and the frame member is formed into a rectangular frame shape surrounding four end faces of the wooden structural material as its outer peripheral surface.The invention described in claim 3 is characterized in that the wooden structural material is formed into a rectangular prism shape, and the frame member is formed into a U-shaped frame shape surrounding three of the four end faces of the wooden structural material as its outer peripheral surface.

[0007] 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.

[0008] The invention described in claim 7 relates to a joining reinforcement for wooden structural materials, which is 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 comprise 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, and 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 pins. Effect of the Invention

[0009] As described above, in the invention according to 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 with structural screws, the structural screws are arranged perpendicular to the axial direction of the drift pins in a position adjacent to the end surface of the wooden structural members, and the structural screws are formed to a length dimension capable of suppressing cracking from the end surface of the wooden structural members caused by bending deformation of the drift pins, and therefore cracking of the wooden structural members can be suppressed by the frame member fitted to 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. and since the frame members are fitted in a position close to the end surface, it is possible to reliably prevent cracking from the end surface of the wooden structural material, where cracking begins. Furthermore, since 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 position relative to the wooden structural material and to reliably restrain the outer peripheral surface of the wooden structural material. In addition, since 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, it is possible to keep the clearance between the outer peripheral surface of the wooden structural material in the cracking direction and the inner surface of the frame member as small as possible. This allows the outer peripheral surface of the wooden structural material to be reliably restrained and cracking failure of the wooden structural material to be suppressed. In turn, the joining strength between the wooden structural material and the joined structural material can be maintained, which in turn allows for simplification and versatility of architectural design and construction.

[0010] In addition, in the invention described in claim 2, the wooden structural material 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 material as its outer peripheral surface. Therefore, the entire outer peripheral surface consisting of the four end faces of the wooden structural material can be surrounded, the outer peripheral surface of the wooden structural material can be securely restrained, and cracking failure of the wooden structural material can be reliably suppressed.

[0011] In the invention described in claim 3, the wooden structural material is formed in a rectangular column shape, and the frame member is formed in a U-shaped frame shape surrounding 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 failure of the wooden structural material and ultimately maintain the joining strength between the wooden structural material and the joined structural material, thereby simplifying and increasing the versatility of architectural design and construction.

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

[0013] 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. [Brief description of the drawings]

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

[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 metal fittings 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 of the wooden structural member F·F, making a total of four. The frame member F·F is fitted into the wooden structural member W·W at a position adjacent to the end faces WK·WK of the wooden structural member W·W. The frame member F·F is attached to the outer periphery of the wooden structural member W·W with a structural screw B. In this case, as shown in Figs. 2 and 4, the structural screw B is inserted into one of the through holes F1 and attached to the outer periphery of the wooden structural member W·W. In addition, the structural screw B is inserted in the axial direction DP O The structural screws B are arranged perpendicular to the ends WK and WK of the wooden structural members W·W, and the structural screws B are formed to have a length dimension capable of suppressing splitting from the ends WK and WK of the wooden structural members W·W caused by 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 located closest to the ends WK and WK" here refers to the drift pin DP located closest to the ends WK and WK of the plurality of drift pins DP··. N This refers to the following.

[0017] Here, the above-mentioned 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 firestops, or reinforcing materials, and the above-mentioned joined structural material M is used for various joined structural materials M other than wood-based structural materials, such as wood-based 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 of 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 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 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 tube portions JM2 / JM2, a connecting shaft JM5 connected to the suspension tube portions JM2 / JM2, a suspension plate portion JM3, a pin JM4 (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 connecting hole JM8 and a pin hole MH, and is configured to connect the joining hardware JW and the connecting fitting JM with 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 joint 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 in opposite directions alternately and perpendicular to the longitudinal direction WL of the wooden structural material W·W.

[0021] As shown in Figs. 2, 8 and 9, the frame members F·F are fitted in a position adjacent to the ends WK·WK of the wooden structural members W·W, and among the multiple drift pins DP··, the drift pin DP·· at the position adjacent to the ends WK·WK of the wooden structural members W·W is N Axial DP O The frame members F·F are fastened to the outer peripheral surfaces of the wooden structural members W·W by the structural screws B, which are perpendicular 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 into a rectangular column shape, and the frame member F·F is formed into a rectangular frame shape surrounding the four wood end faces WS·· which 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, aluminum, etc., and the frame member F 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, and the two structural screws B·B are screwed in from opposite directions, or a plurality of the structural screws B are arranged, and of the plurality of structural screws B·, at least two of the 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 of the structural screws B·B are screwed in from opposite directions.

[0025] 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.

[0026] Since this first embodiment has the above-mentioned configuration, as shown in Figs. 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 metal fittings 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 adjacent to the end faces WK·WK of the wooden structural members W·W, the frame members F·F are fastened to the outer peripheral surfaces of the wooden structural members W·W by structural screws B, and the structural screws B are fastened to the drift pins DP N Axial DP Oand the structural screws B are formed to have a length dimension which can prevent splitting of the wooden structural materials W·W from the end faces WK·WK caused by bending deformation of the drift pins DP. Therefore, splitting of the wooden structural materials W·W can be prevented 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 a position close 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 begins can be reliably prevented. Furthermore, since the frame members F·F are fastened to the outer peripheral surface of the wooden structural materials W·W by the structural screws B, displacement of the frame members F·F relative to the wooden structural materials W·W can be prevented and the outer peripheral surface of the wooden structural materials W·W can be reliably restrained. In addition, the structural screws B are fastened to the drift pins DP N Axial DP O By being arranged 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 members M to be maintained, thereby simplifying and increasing the versatility of architectural design and construction.

[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·· of the outer periphery of the wooden structural members W·W. Therefore, the outer periphery consisting of the four wood end faces WS·· of the wooden structural members W·W can be entirely surrounded, the outer periphery of the wooden structural members W·W can be securely restrained, and the splitting failure of the wooden structural members W·W can be securely suppressed. In this case, the frame members F are made of a 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, and the durability of the wooden structural members W can be improved. 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, and the durability of the wooden structural members W can be improved.

[0028] 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. This makes it possible to keep as small as possible the clearance between the opposing outer surfaces of the wooden structural materials W·W in the splitting direction CK and the inner surfaces of the frame members F·F, thereby suppressing rattling and loosening due to gaps between the outer surfaces of the wooden structural materials W·W and the inner surfaces of the frame members F·F. This makes it possible to reliably restrain the outer surfaces of the wooden structural materials W·W and suppress splitting failure of the wooden structural materials W·W. This in turn improves the joining strength against tensile, compressive and bending loads applied to the wooden structural materials W·W and maintains the joining strength between the wooden structural materials W·W and the joined structural material M, thereby simplifying and enhancing the versatility 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 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.

[0030] The second embodiment of the present invention shown in Figs. 10 and 11 shows a different structure. The same reference numerals are used for the same parts as in the first embodiment. In this case, only the structure of the frame member F is different from that of the first embodiment. That is, the wooden structural material W is formed in a rectangular column shape, and the frame member F is formed in a U-shaped frame shape surrounding three of the four wood end faces WS·· that form the outer peripheral surface of the wooden structural material W. The U-shaped frame member F surrounds two of the four wood end faces WS·· that face 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 also formed in a rectangular prism shape, and the frame member F is formed in a U-shaped frame shape surrounding three of the four wood end faces WS·· that form the outer peripheral surface 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 cracking failure of the wooden structural material W, and ultimately to maintain the joining strength between the wooden structural material W and the joined structural material M. This allows the architectural design and structure to be simplified and more flexible, 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 reference numerals to the same parts as in the first embodiment. In this case, as shown in Figure 12, the present invention 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 has a structure consisting of a base portion JW5, a connecting piece portion JW6 and a drift pin DP, and an 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 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 a wooden structural material W, the frame member F is fitted to a position adjacent to the end face 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 a structural screw B, and the structural screw B is fastened to the outer peripheral surface of the wooden structural material W by a structural screw B in the axial direction DP of the drift pin DP adjacent to the end face WK of the wooden structural material W. O 12 and 13, four drift pins DP are arranged, and the "drift pins DP in the position closest to the end face WK" here refers to the two drift pins DP... that are arranged side by side at the position closest to the end face WK of the 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 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 prevented. 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 fastened to the drift pins DP N Axial DP 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 dimension which can prevent cracking 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 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 also makes it 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.

[0037] 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, this embodiment is applied to a joining structure between two wooden structural members W·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.

[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 consisting of a base portion JW5, a connecting piece portion JW6, a slanted plate portion JW7 and a drift pin DP similar to that of the third embodiment described above, and an 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.

[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 each 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 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 with a structural screw B, and the structural screw B is fastened to the outer peripheral surface of the wooden structural members W·W with a structural screw B in the axial direction DP of the drift pin DP adjacent 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 structural screws B are formed to have a length dimension capable of suppressing splitting from the ends WK and WK of the wooden structural members W·W caused by bending deformation of the drift pins DP. In other words, in this case, as shown in Figs. 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 located closest to the ends WK and WK" referred to here are the two 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 members M, cracking 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. 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 begins, can be reliably prevented. Furthermore, since the frame members F·F are fastened to the outer peripheral surfaces of the wooden structural members W·W with 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 drift pins DP N Axial DP 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 dimension which can prevent cracking 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 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, preventing cracking failure of the wooden structural materials W·W and ultimately maintaining the joining strength between the wooden structural materials W·W and the joined structural material M. This allows for simplification and versatility of the architectural design and structure, and provides the same effects as the first embodiment described above.

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

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

[0044] W Wooden structural material WL Longitudinal WK End surface 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 joined structural materials 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 into 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 secured to the outer peripheral surface of the wooden structural material by structural screws, the structural screws are arranged perpendicular to the axial direction of the drift pin in a position close to the end surface of the wooden structural material, and 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.

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

3. 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 U-shaped frame shape surrounding three of the four wood end faces that form the outer peripheral surface of the wooden structural material.

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

5. 2. A 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 except for the head is a male thread.

7. A joining device for joining wooden structural materials and joined structural materials of 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 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 pin in a position close to the end surface of the wooden structural material, and the structural screws are formed to a length dimension sufficient to prevent cracking from the end surface of the wooden structural material caused by bending deformation of the drift pin.

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