Wooden shaft member, and connection structure between wooden shaft member and other member

Abstract

To provide a wooden shaft member provided with a slit, into which a steel plate fixed on another member is inserted, the wooden shaft member being connected to the other member through a drift pin, so as to prevent cracking by suppressing preceding yield of the drift pin, and reduce the insertion length of the steel plate into the slit as much as possible, and to provide a connection structure between the wooden shaft member and the other member.SOLUTION: A wooden shaft member 10 comprises four second pin holes 14, each arranged at one of intersections 15 formed by two lines along a longer direction and two lines along a shorter direction of the wooden shaft member 10, wherein an interval between pin holes in the longer direction is within a range of 55 mm or more to less than 7d mm and an interval between pin holes in the shorter direction is within a range of 50 mm or more to 55 mm or less when the pin hole diameter of the second hole 14 is defined as d mm.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a wooden shaft member and a joining structure between a wooden shaft member and another member. [Background technology]

[0002] In wooden buildings constructed using the wooden frame construction method, the wooden shaft members that form the pillars, beams, foundations, etc. are joined together using drift pins, which are fastening members together to improve earthquake resistance, etc.

[0003] Incidentally, when a timber with a cross-sectional dimension of 105mm x 105mm (so-called 105mm square timber) is joined to another timber using a drift pin, the strength of the drift pin, which is a joining hardware, is often determined by the splitting of the end grain of the timber. One of the main causes of the splitting of the end grain is that the drift pin yields and bends, causing localized stress concentration in the contact area of ​​the timber with the drift pin, which then leads to the splitting.

[0004] The Design Standards for Timber Structures and Commentary - Allowable Stress and Allowable Strength Design Method (Architectural Institute of Japan) (hereinafter referred to as "Design Standards") also assumes that in drift pin joints, the strength of the joint metal is determined by the splitting of the end grain. In order to obtain sufficient strength, the design standards state that the distance between drift pins is 7dmm (or more) when the drift pins have a diameter of dmm, and set the distance so that wood can adequately withstand localized stress concentrations.

[0005] In addition, in the case of joints with steel plate insertion specifications that place four or more drift pins to create a high-strength joint, when designed based on design standards for square timber with a 105mm or 120mm square (cross-sectional dimensions 120mm x 120mm) cross section, which has a circulation cross section, the length to which the steel plate is inserted will be 200mm or more, which may require manual processing or other work depending on the precut factory, resulting in increased production costs.

[0006] In view of the above, with regard to a wooden shaft member which has a slit into which a steel plate fixed to another member is inserted and which is joined to the other member via a drift pin, it is desirable to have a wooden shaft member which can suppress pre-yielding of the drift pin to make cracking less likely to occur, and which can reduce the insertion length of the steel plate into the slit as much as possible, and a joining structure between this wooden shaft member and the other member.

[0007] Here, Patent Document 1 proposes a joining structure for a column end. This joining structure includes a column having an insertion hole extending in the length direction on the end face and a first pin hole perpendicular to the insertion hole, a connector that is long enough to be inserted entirely into the insertion hole and is fixed in a state where a part of the connector protrudes from the insertion hole, a first drift pin that fixes the connector to the column when inserted into the first pin hole, a horizontal member that has a fixing hole into which the connector protruding from the insertion hole is inserted and a second pin hole perpendicular to the fixing hole, and a second drift pin that fixes the connector to the horizontal member when inserted into the second pin hole. A slit is formed in the column from the end face in the length direction, the slit being formed so as to be perpendicular to the first drift pin when viewed from the length direction of the column. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2018-162582 A Summary of the Invention [Problem to be solved by the invention]

[0009] According to the joint structure of the column end described in Patent Document 1, the column member can be installed even when horizontal members are installed above and below, and construction is easy and fine adjustments are possible. However, Patent Document 1 does not disclose the above-mentioned problem, that is, a means for suppressing the pre-yielding of the drift pin in the wooden shaft member to make it difficult for splitting to occur.

[0010] The present invention has been made in consideration of the above-mentioned problems, and relates to a wooden shaft member which has a slit into which a steel plate fixed to another member is inserted and which is joined to the other member via a drift pin.The object of the present invention is to provide a wooden shaft member which can suppress pre-yielding of the drift pin to make cracking less likely to occur, and which can reduce the insertion length of the steel plate into the slit as much as possible, and a joining structure between this wooden shaft member and another member. [Means for solving the problem]

[0011] In order to achieve the above object, one aspect of the wooden shaft member according to the present invention is as follows: A wooden shaft member and another member are joined to each other, the other member has a steel plate having a plurality of first pin holes fixed thereto, the wooden shaft member has a slit into which the steel plate is inserted, the wooden shaft member further has a plurality of second pin holes that communicate with the plurality of first pin holes of the steel plate inserted into the slit and are perpendicular to the slit, and a drift pin is inserted into a communicating hole consisting of the communicating first pin hole and the communicating second pin hole, The second pin holes are provided at the intersections of two rows along the longitudinal direction of the wooden shaft member and two rows along the lateral direction of the wooden shaft member, for a total of four. When the diameter of the second pin hole is d mm, The pinhole spacing in the longitudinal direction is in the range of 55 mm or more and less than 7 dmm, The pinhole spacing in the short side direction is in the range of 50 mm to 55 mm.

[0012] According to this aspect, a wooden shaft member has a slit into which a steel plate with a plurality of first pin holes to be fixed to another member is inserted, and further has a plurality of second pin holes connected to the first pin holes and perpendicular to the slits, and a drift pin is inserted into a communicating hole consisting of the first pin hole and the second pin hole. A total of four second pin holes are provided at the intersections of two rows along the longitudinal direction of the wooden shaft member and two rows along the lateral direction of the wooden shaft member, and the pin hole spacing (hole center spacing) in the longitudinal direction is in the range of 55 mm or more and less than 7 dmm, and the pin hole spacing (hole center spacing) in the lateral direction is in the range of 50 mm or more and 55 mm or less, so that the steel plate can yield before the drift pin, and pre-yielding of the drift pin can be suppressed, making it less likely for cracking to occur. Furthermore, by setting the longitudinal pinhole spacing in the range of 55 mm or more and less than 7 dmm, which is shorter than the design standard of "7d or more," the length of the steel plate inserted into the slit can be made as short as possible, thereby suppressing increases in the manufacturing costs of the steel plate.

[0013] According to the design standards, the distance between the drift pins is "3d or more," and when the diameter of the drift pin is the same as the diameter of the second pinhole, d mm, and the generally applicable diameter d of the drift pin is 12 mm, the distance between the drift pins must be 36 mm or more.However, the inventors have determined that if the distance between the drift pins is less than 50 mm, a different failure mode is more likely to occur and the performance of the wooden shaft member becomes unstable.

[0014] In addition, the design standards state that the edge clearance must be "1.5d or more," and when the drift pin diameter d is 12 mm, the edge clearance must be 18 mm or more. However, when the distance between the drift pins is 55 mm, the edge clearance becomes 25 mm. The inventors have determined that when the edge clearance is less than 25 mm, another failure mode is likely to occur, and the performance of the wooden shaft member becomes unstable.

[0015] Based on the above, a minimum pinhole spacing of 55 mm in the longitudinal direction, and a minimum pinhole spacing of 50 mm and a maximum pinhole spacing of 55 mm in the lateral direction are specified.

[0016] On the other hand, by setting the maximum pinhole spacing in the longitudinal direction to less than 7 dmm, the length of the slit can be set to less than 200 mm, and therefore the length of the inserted steel plate can be set to less than 200 mm, thereby suppressing increases in the manufacturing costs of the steel plate.

[0017] Here, the wooden shaft member can be a square timber with a size of 105mm, 120mm, or 150mm (cross-sectional dimensions of 150mm x 150mm), and since all of these are commonly available square timbers, they are easy to obtain and the material cost can be kept as low as possible. In addition, other members to be joined to the wooden shaft member can be a separate wooden shaft member or a concrete (reinforced concrete) foundation. For example, when the wooden shaft member of this embodiment is a wooden pillar, other members can be a wooden beam, a wooden base, or a concrete foundation.

[0018] The slits provided in the wooden shaft member may be one slit at the center of the end face of the wooden shaft member, or two slits at non-center positions. The latter form, for example, when the other member is a concrete foundation, makes it possible to prevent interference between the anchor bar that may be embedded in the center of the wooden pillar and the steel plate inserted in the slit when joining the wooden pillar and the concrete foundation with an anchor bar.

[0019] Another aspect of the wooden shaft member according to the present invention is as follows: A wooden shaft member and another member are joined to each other, the other member has a steel plate having a plurality of first pin holes fixed thereto, the wooden shaft member has a slit into which the steel plate is inserted, the wooden shaft member further has a plurality of second pin holes that communicate with the plurality of first pin holes of the steel plate inserted into the slit and are perpendicular to the slit, and a drift pin is inserted into a communicating hole consisting of the communicating first pin hole and the communicating second pin hole, The second pin holes are provided at the intersections of two rows along the longitudinal direction of the wooden shaft member and three rows along the lateral direction of the wooden shaft member, for a total of six. When the diameter of the second pin hole is d mm, The pin hole spacing in the longitudinal direction is in the range of 5d or more and less than 7dmm, The pinhole spacing in the short side direction is in the range of 50 mm to 55 mm.

[0020] According to this aspect, a wooden shaft member has a slit into which a steel plate having a plurality of first pin holes fixed to another member is inserted, and further has a plurality of second pin holes that communicate with the first pin holes and are perpendicular to the slits, and a drift pin is inserted into the communication hole consisting of the first pin holes and the second pin holes, and a total of six second pin holes are provided at each intersection of two rows along the longitudinal direction of the wooden shaft member and three rows along the transverse direction of the wooden shaft member, and the longitudinal pin hole interval is in the range of 5d to less than 7dmm, and the transverse pin hole interval is in the range of 50mm to 55mm, so that the steel plate can yield before the drift pin, and the pre-yielding of the drift pin can be suppressed to make it difficult to cause splitting. Furthermore, by setting the longitudinal pin hole interval in the range of 5d to less than 7dmm, shorter than the design standard "7d or more", the length of the steel plate inserted into the slit can be shortened as much as possible, and the increase in the manufacturing cost of the steel plate can be suppressed.

[0021] Another aspect of the wooden shaft member according to the present invention is as follows: The longitudinal length of the slit is 200 mm or less.

[0022] According to this embodiment, the longitudinal length of the slit is 200 mm or less, which prevents the need for laborious manual processing at a precut factory and suppresses increases in the production costs of the steel plate.

[0023] Another aspect of the wooden shaft member according to the present invention is as follows: The cross-sectional dimensions of the slit-equipped square timber are 105 mm x 105 mm.

[0024] According to this embodiment, by using 105mm square timber, which is the most widely distributed type of timber, material costs can be kept as low as possible.

[0025] In addition, one aspect of the joint structure of the present invention between a wooden shaft member and another member is as follows: A joining structure between a wooden shaft member and another member, the joining structure being formed by: a steel plate having a plurality of first pin holes fixed to the other member, the wooden shaft member having a slit into which the steel plate is inserted; the wooden shaft member further having a plurality of second pin holes that communicate with the plurality of first pin holes of the steel plate inserted into the slit and are perpendicular to the slit; and a drift pin being inserted into a communicating hole consisting of the communicating first pin hole and the communicating second pin hole; The second pin holes are provided at the intersections of two rows along the longitudinal direction of the wooden shaft member and two rows along the lateral direction of the wooden shaft member, for a total of four. When the diameter of the second pin hole is d mm, The pinhole spacing in the longitudinal direction is in the range of 55 mm or more and less than 7 dmm, The pinhole interval in the short side direction is in the range of 50 mm to 55 mm, The drift pins are inserted into the four communication holes, respectively, The present invention is characterized in that the steel plate is designed to yield before the drift pin.

[0026] According to this aspect, with regard to the wooden shaft member and another member to be joined to each other, a steel plate fixed to the other member and having a plurality of first pin holes opened therein is inserted into a slit provided in the wooden shaft member, and the wooden shaft member is further provided with a plurality of second pin holes connected to the first pin holes and perpendicular to the slits, and a drift pin is inserted into a communicating hole consisting of the first pin hole and the second pin hole to form a joining structure, in which a total of four second pin holes are provided at each intersection of two rows along the longitudinal direction of the wooden shaft member and two rows along the lateral direction of the wooden shaft member, the pin hole spacing in the longitudinal direction is in the range of 55 mm or more and less than 7 dmm, and the pin hole spacing in the lateral direction is in the range of 50 mm or more and 55 mm or less, so that the steel plate can be designed to yield before the drift pin, and pre-yielding of the drift pin can be suppressed, making it less likely for cracking to occur.

[0027] Another aspect of the joint structure of the present invention between a wooden shaft member and another member is as follows: A joining structure between a wooden shaft member and another member, the joining structure being formed by: a steel plate having a plurality of first pin holes fixed to the other member, the wooden shaft member having a slit into which the steel plate is inserted; the wooden shaft member further having a plurality of second pin holes that communicate with the plurality of first pin holes of the steel plate inserted into the slit and are perpendicular to the slit; and a drift pin being inserted into a communicating hole consisting of the communicating first pin hole and the communicating second pin hole; The second pin holes are provided at the intersections of two rows along the longitudinal direction of the wooden shaft member and three rows along the lateral direction of the wooden shaft member, for a total of six. When the diameter of the second pin hole is d mm, The pin hole spacing in the longitudinal direction is in the range of 5d or more and less than 7dmm, The pinhole interval in the short side direction is in the range of 50 mm to 55 mm, The drift pins are inserted into the six communication holes, respectively, The present invention is characterized in that the steel plate is designed to yield before the drift pin.

[0028] According to this aspect, with regard to the wooden shaft member and another member to be joined to each other, a steel plate fixed to the other member and having a plurality of first pin holes opened therein is inserted into a slit provided in the wooden shaft member, and the wooden shaft member is further provided with a plurality of second pin holes connected to the first pin holes and perpendicular to the slits, and a drift pin is inserted into a communicating hole consisting of the first pin hole and the second pin hole to form a joining structure, in which a total of six second pin holes are provided at the intersections of two rows along the longitudinal direction of the wooden shaft member and three rows along the lateral direction of the wooden shaft member, the pin hole spacing in the longitudinal direction is in the range of 5d or more and less than 7d, and the pin hole spacing in the lateral direction is in the range of 50mm or more and 55mm or less, so that the steel plate can be designed to yield before the drift pin, and pre-yielding of the drift pin can be suppressed, making it less likely for cracking to occur.

[0029] In another embodiment of the joint structure of the wooden shaft member and another member according to the present invention, The other member is either a separate wooden frame member or a concrete foundation.

[0030] According to this aspect, since the other member is a separate wooden shaft member, it is possible to form a joint structure between a wooden column and a wooden beam, or a joint structure between a wooden column and a wooden foundation, in which splitting failure of the wooden column, which is the wooden shaft member, is suppressed. Also, when the wooden column, which is the wooden shaft member, is directly joined to the concrete foundation, it becomes a joint structure between the wooden shaft member and the concrete foundation.

[0031] Another aspect of the joint structure of the present invention between a wooden shaft member and another member is as follows: The cross-sectional dimensions of the slit-equipped square timber are 105 mm x 105 mm.

[0032] According to this embodiment, by using 105mm square timber, which is the most widely distributed type of timber, the material costs can be kept as low as possible, thereby reducing the construction costs of the joint structure. Effect of the Invention

[0033] As can be understood from the above explanation, according to the wooden shaft member and the joining structure between the wooden shaft member and other members of the present invention, the wooden shaft member has a slit into which a steel plate fixed to the other member is inserted and is joined to the other member via a drift pin, and by suppressing pre-yielding of the drift pin, it is possible to make the wooden shaft member less likely to crack, and it is possible to reduce the insertion length of the steel plate into the slit of the wooden shaft member as much as possible. [Brief description of the drawings]

[0034] [Figure 1] FIG. 2 is an exploded perspective view of an example of a joining structure between a wooden shaft member according to an embodiment and another member, the joining structure including an example of a wooden shaft member according to an embodiment. [Diagram 2] 2 is a view taken in the direction of the arrow II in FIG. 1, and is a front view showing an example of an arrangement of second pin holes in a wooden shaft member according to the embodiment. FIG. [Diagram 3]FIG. 1 is a perspective view of an example of a joint structure between a wooden pillar and a steel beam according to an embodiment. [Figure 4A] 1A to 1C are schematic diagrams illustrating an example of a destruction mode when the distance between drift pins is narrow. [Figure 4B] FIG. 13 is a schematic diagram illustrating an example of a failure mode when the edge clearance is narrow. [Diagram 5] FIG. 3 is a front view corresponding to FIG. 2, showing another example of the arrangement of the second pin holes in the wooden shaft member according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0035] Hereinafter, an example of a wooden shaft member and a joint structure between a wooden shaft member and another member according to an embodiment will be described with reference to the accompanying drawings. In this specification and the drawings, substantially the same components are designated by the same reference numerals to avoid redundant description.

[0036] [Wooden frame member according to the embodiment, and joint structure between wooden frame member and other members] An example of a wooden shaft member according to the embodiment and a joint structure between a wooden shaft member and another member will be described with reference to Fig. 1 to Fig. 5. Fig. 1 is an exploded perspective view of an example of a joint structure between a wooden shaft member according to the embodiment and another member, including an example of a wooden shaft member according to the embodiment, and Fig. 2 is a front view taken in the direction of arrow II in Fig. 1, showing an example of an arrangement of second pin holes in the wooden shaft member according to the embodiment. Fig. 3 is a perspective view of an example of a joint structure between a wooden column and a steel beam according to the embodiment.

[0037] The wooden shaft member 10 in the illustrated example is a wooden pillar, and the other member 20 joined to this wooden pillar 10 is a wooden base. Therefore, the joint structure 50 in the illustrated example is a joint structure between the wooden pillar 10 and the wooden base 20, but the other member 20 may be a wooden beam, a concrete foundation, etc. in addition to a wooden base.

[0038] The wooden pillar 10 is formed of a 105 mm square timber with a square cross section and a side length t1 of 105 mm. The wooden pillar 10 may be formed of a 120 mm or 150 mm square timber, but it is preferable to use a 105 mm square timber, which is the most widely distributed type of timber, because this keeps material costs as low as possible and reduces the construction costs of the joint structure.

[0039] A slit 13 having a longitudinal length t2 and extending across a pair of opposing side surfaces 11A is provided at the center of the bottom end surface 12. Here, the length t2 of the slit 13 is set to 200 mm or less. Here, a plurality of slits (for example, two) may be provided at a position other than the center of the bottom end surface 12.

[0040] In addition, four second pin holes 14 (through holes) extending in a direction perpendicular to the slits 13 are provided across the other pair of side surfaces 11B, and each second pin hole 14 is provided at each intersection 15 of two rows along the longitudinal direction and two rows along the lateral direction of the wooden column 10 on the side surface 11B.

[0041] Here, when the hole diameter of the second pinhole 14 is dmm, the pinhole spacing t3 in the longitudinal direction of the wooden pillar 10 is in the range of 55 mm or more and less than 7 dmm, and the pinhole spacing t4 in the transverse direction of the wooden pillar 10 is set in the range of 50 mm or more and 55 mm or less.

[0042] Further, the drift pin 40 is inserted into the second pin hole 14, and the hole diameter d of the second pin hole 14 and the diameter d of the drift pin 40 are both set to about 10 mm to 14 mm, for example, 12 mm.

[0043] Meanwhile, an embedded metal fitting 30 is attached to the wooden foundation 20, which is another member. The embedded metal fitting 30 has a pair of opposing mounting plates 32, 33 that are rectangular in plan view, an embedded plate 31 (an example of a steel plate) that is connected to the wide surface of one of the mounting plates 32 by welding or the like and that extends in a direction perpendicular to the mounting plate 32, and an attachment bolt 34 that connects the pair of mounting plates 32, 33 to each other. In the illustrated example, the mounting plates 32, 33 abut against both the upper end surface 21 and the lower end surface 22 of the wooden foundation 20, and have two mounting bolts 34 (only one mounting bolt 34 is shown in FIG. 1) at two diagonal positions sandwiching the embedded plate 31, but four mounting bolts may be provided at four positions at each corner of the mounting plates 32, 33.

[0044] When the embedded plate 31 is inserted into the slit 13 of the wooden pillar 10 in the X1 direction and the lower end surface 12 of the wooden pillar 10 is placed on the mounting plate 32, an accommodating groove 12a is provided on the lower end surface 12 in which the head of the mounting bolt 34 is accommodated.

[0045] Four first pin holes 35 are provided at positions on the wide surface 31a of the buried plate 31 that correspond to the four second pin holes 14 when the buried plate 31 is inserted into the slit 13. The drift pins 40 are inserted in the X2 direction into communication holes formed by communication between the corresponding first pin holes 35 and the second pin holes 14, thereby forming a joint structure 50 between the wooden shaft member and another member as shown in FIG.

[0046] As shown in Figures 1 to 3, the longitudinal pin hole spacing of the second pin hole 14 is in the range of 55 mm or more and less than 7 dmm, and the transverse pin hole spacing is in the range of 50 mm or more and 55 mm or less, so that the steel plate 31 inserted into the slit 13 can be made to yield before the drift pin 40, thereby suppressing the pre-yielding of the drift pin 40 and making it less likely for the wooden column 10 to crack.

[0047] Furthermore, by setting the longitudinal pinhole spacing in the range of 55 mm or more and less than 7d mm, which is shorter than the design standard of ``7d or more,'' the length of the steel plate 31 inserted into the slit 13 can be set to less than 200 mm.Therefore, by setting the length of the steel plate 31 to less than 200 mm, it is possible to suppress increases in the manufacturing costs of the steel plate 31.

[0048] According to the design standards, the distance between drift pins is "3d or more," and when the diameter d of the generally applicable drift pin 40 is 12 mm, the distance between drift pins must be 36 mm or more. However, the inventors have determined that if the distance between drift pins is less than 50 mm, a different failure mode is more likely to occur and the performance of the wooden shaft member becomes unstable.

[0049] Specifically, as shown in FIG. 4A, in a short configuration in which the distance between adjacent drift pins in the short direction (the distance between second pin holes) is less than 50 mm, for example, a crack S1 connecting these second pin holes 14 is likely to occur, and further, a fracture mode that progresses to a crack S1 connecting adjacent second pin holes 14 in the longitudinal direction is likely to occur.

[0050] In addition, the design standards state that the edge clearance must be "1.5d or more," and when the drift pin diameter d is 12 mm, the edge clearance must be 18 mm or more. However, when the distance between the drift pins is 55 mm, the edge clearance becomes 25 mm. The inventors have determined that when the edge clearance is less than 25 mm, another failure mode is likely to occur, and the performance of the wooden shaft member becomes unstable.

[0051] Specifically, as shown in FIG. 4B, in a narrow edge clearance of less than 25 mm, a crack S2 connecting the side surface 11 and the second pinhole 14 is likely to occur, and further, a failure mode is likely to occur in which the crack S2 progresses to connecting adjacent second pinholes 14 in the longitudinal direction.

[0052] Based on the above, a minimum pinhole spacing of 55 mm in the longitudinal direction, and a minimum pinhole spacing of 50 mm and a maximum pinhole spacing of 55 mm in the lateral direction are specified.

[0053] On the other hand, by setting the maximum longitudinal pinhole spacing to less than 7 dmm, the length of the steel plate 31 can be set to less than 200 mm as described above, thereby suppressing increases in the manufacturing costs of the steel plate 31. Therefore, the longitudinal pinhole spacing is set to less than 7 dmm, shorter than the "7d or more" specified in the design standards.

[0054] FIG. 5 is a front view showing another example of the arrangement of the second pin holes.

[0055] In the illustrated arrangement, a total of six second pin holes 14 are provided at each intersection 15 of two rows along the longitudinal direction and three rows along the lateral direction of the wooden pillar 10. When the hole diameter of the second pin holes 14 is dmm, the pin hole interval in the longitudinal direction is in the range of 5d or more and less than 7dmm, and the pin hole interval in the lateral direction is in the range of 50mm or more and 55mm or less.

[0056] Even in this arrangement, the steel plate 31 inserted into the slit 13 can be made to yield before the drift pin 40, suppressing the pre-yielding of the drift pin 40 and making it difficult for the wooden column 10 to split. Furthermore, the length of the steel plate 31 inserted into the slit 13 can be set to less than 200 mm, and therefore, by being able to set the length of the steel plate 31 to less than 200 mm, it is possible to suppress an increase in the manufacturing cost of the steel plate 31.

[0057] [Tensile test and results] The inventors fabricated a test specimen (Example 1) in which a steel plate was inserted into a slit in a 105mm square wooden pillar and the wooden pillar and steel plate were connected with four drift pins as shown in Figures 1 to 3, and a test specimen (Example 2) in which the wooden pillar and steel plate were connected with six drift pins as shown in Figure 5. For each test specimen, the drift pins were optimally arranged to maximize the total tensile strength within the second pinhole spacing (drift pin spacing) mentioned above.

[0058] Tensile tests were performed on each specimen. As a result, in Example 1, the maximum load of the four drift pins was about 140 kN, while the yield value of the steel plate was about 75 kN, confirming that the steel plate yielded first.

[0059] On the other hand, in Example 2, the maximum load of the six drift pins was about 180 kN, while the yield value of the steel plate was about 95 kN, and similarly, the steel plate yielded first.

[0060] This tensile test demonstrates that the drift pin spacing (second pin hole spacing) and number of drift pins in Examples 1 and 2 can suppress pre-yielding of the drift pins and make wooden columns less susceptible to cracking.

[0061] In addition, the present invention is not limited to the configuration shown here, and may be implemented in other embodiments in which other components are combined with the configurations and the like of the above-mentioned embodiment. In this regard, the present invention may be modified within the scope of the gist of the present invention, and may be appropriately determined according to the application form. [Explanation of symbols]

[0062] 10: Wooden pillar (wooden shaft member) 11,11A,11B: Side 12: Bottom end surface 13: Slit 14: 2nd pin hole 15: Intersection 20: Wooden base (other materials) 21: Upper end surface 22: Bottom end surface 30: Buried fittings 31: Buried plate (steel plate) 31a: Wide surface 32, 33: Mounting plate (steel plate) 34: Mounting bolt 35: First pinhole 40: Drift pin 50: Joint structure (joint structure between wooden frame member and other member) S1,S2: Warisaku

Claims

1. A wooden shaft member and another member are joined to each other, the other member has a steel plate having a plurality of first pin holes fixed thereto, the wooden shaft member has a slit into which the steel plate is inserted, the wooden shaft member further has a plurality of second pin holes which communicate with the plurality of first pin holes of the steel plate inserted into the slit and are perpendicular to the slit, and a drift pin is inserted into a communicating hole consisting of the communicating first pin hole and the communicating second pin hole, The second pin holes are provided at the intersections of two rows along the longitudinal direction of the wooden shaft member and two rows along the lateral direction of the wooden shaft member, for a total of four. When the hole diameter of the second pin hole is d mm, The pinhole spacing in the longitudinal direction is in the range of 55 mm or more and less than 7 dmm, A wooden shaft member, characterized in that the pinhole spacing in the short side direction is in the range of 50 mm to 55 mm.

2. A wooden shaft member and another member are joined to each other, the other member has a steel plate having a plurality of first pin holes fixed thereto, the wooden shaft member has a slit into which the steel plate is inserted, the wooden shaft member further has a plurality of second pin holes which communicate with the plurality of first pin holes of the steel plate inserted into the slit and are perpendicular to the slit, and a drift pin is inserted into a communicating hole consisting of the communicating first pin hole and the communicating second pin hole, The second pin holes are provided at the intersections of two rows along the longitudinal direction of the wooden shaft member and three rows along the lateral direction of the wooden shaft member, for a total of six. When the hole diameter of the second pin hole is d mm, The pinhole spacing in the longitudinal direction is in the range of 5d or more and less than 7d mm, A wooden shaft member, characterized in that the pinhole spacing in the short side direction is in the range of 50 mm to 55 mm.

3. 3. A wooden shaft member according to claim 1 or 2, characterized in that the length of the slit in the longitudinal direction is 200 mm or less.

4. 3. A wooden shaft member according to claim 1 or 2, characterized in that the cross-sectional dimensions of the square timber with the slits are 105 mm x 105 mm.

5. A joining structure between a wooden shaft member and another member, the joining structure being formed by: a steel plate having a plurality of first pin holes fixed to the other member, the wooden shaft member having a slit into which the steel plate is inserted; the wooden shaft member further having a plurality of second pin holes that communicate with the plurality of first pin holes of the steel plate inserted into the slit and are perpendicular to the slit; and a drift pin being inserted into a communicating hole consisting of the communicating first pin hole and the communicating second pin hole; The second pin holes are provided at the intersections of two rows along the longitudinal direction of the wooden shaft member and two rows along the lateral direction of the wooden shaft member, for a total of four. When the hole diameter of the second pin hole is d mm, The pinhole spacing in the longitudinal direction is in the range of 55 mm or more and less than 7 dmm, The pinhole interval in the short side direction is in the range of 50 mm to 55 mm, The drift pins are inserted into the four communication holes, respectively, A joint structure between a wooden frame member and another member, characterized in that the steel plate is designed to yield before the drift pin.

6. A joining structure between a wooden shaft member and another member, the joining structure being formed by: a steel plate having a plurality of first pin holes fixed to the other member, the wooden shaft member having a slit into which the steel plate is inserted; the wooden shaft member further having a plurality of second pin holes that communicate with the plurality of first pin holes of the steel plate inserted into the slit and are perpendicular to the slit; and a drift pin being inserted into a communicating hole consisting of the communicating first pin hole and the communicating second pin hole; The second pin holes are provided at the intersections of two rows along the longitudinal direction of the wooden shaft member and three rows along the lateral direction of the wooden shaft member, for a total of six. When the hole diameter of the second pin hole is d mm, The pinhole spacing in the longitudinal direction is in the range of 5d or more and less than 7d mm, The pinhole interval in the short side direction is in the range of 50 mm to 55 mm, The drift pins are inserted into the six communication holes, respectively, A joint structure between a wooden frame member and another member, characterized in that the steel plate is designed to yield before the drift pin.

7. 7. A joint structure for connecting a wooden frame member and another member according to claim 5 or 6, characterized in that the other member is either a separate wooden frame member or a concrete foundation.

8. 8. A joining structure for a wooden shaft member and another member as described in claim 7, characterized in that the cross-sectional dimensions of the square timber with the slits are 105 mm x 105 mm.

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