Timber joint construction

Abstract

To provide a wooden material joint structure which can secure high joint strength when a wooden material is joined.SOLUTION: A wooden material joint structure has a first member 2 made of a wooden material, a second member 3 joined to the first member 2, and a rod-like joint member 4 for joining the first member 2 and the second member 3. A diameter enlarged member 8 having a diameter larger than the outer diameter of the joint member 4 is coaxially provided on the joint member 4, an insertion hole 5 to which the joint member 4 provided with the diameter enlarged member 8 is inserted is formed in the first member 2, and the first member 2 and the second member 3 are joined to each other by filling the insertion hole 5 with an adhesive 17, in a state in which the joint member 4 provided with the diameter enlarged member 8 is inserted to the insertion hole 5.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a wooden material joint structure. [Background technology]

[0002] Rigid frame structures are sometimes used as a type of building structure. Rigid frame structures support the entire building by connecting columns and beams, and have the advantage of allowing large spaces to be created inside medium- to large-scale buildings. In particular, in recent years, there has been a growing trend to use domestic timber as a building material, from the perspective of preserving the global environment and revitalizing local areas.

[0003] For example, Patent Document 1 listed below describes a wooden joined body 1 in which a column member 2 and a beam member 3, both made of wood, are joined with a reinforcing material 4 (jointing member) and an adhesive 5. A first insertion hole 22 is formed in the column member 2, and a second insertion hole 32 is formed in the beam member 3, and a common reinforcing material 4 is inserted into these insertion holes 22, 32. After the reinforcing material 4 is inserted, adhesive 5 is filled into the insertion holes 22, 32 (see, in particular, paragraphs 0026 to 0035, Figure 1, etc. of Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-95375 Summary of the Invention [Problem to be solved by the invention]

[0005] In the joining structure disclosed in Patent Document 1, as shown in Fig. 5(b), when joining member 100 serving as a reinforcing material is inserted into insertion hole 101, the difference between the outer diameter of joining member 100 and the inner diameter of insertion hole 101 can cause joining member 100 to become eccentric with respect to the axis of insertion hole 101 (particularly when insertion hole 101 is formed in the horizontal direction, joining member 100 becomes eccentric toward the lower end). If adhesive 102 is filled into insertion hole 101 in a state where joining member 100 is eccentric, the thickness of the layer of adhesive 102 formed around joining member 100 will be uneven, and there is a risk that sufficient joining strength between members 103 cannot be obtained.

[0006] Therefore, an object of the present invention is to provide a wooden material joining structure that can ensure high joining strength when joining wooden materials. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention provides: A first member made of wood; a second member joined to the first member; a rod-shaped joining member that joins the first member and the second member; A wood material joining structure (first structure) is constructed, in which an expanding diameter member having a diameter larger than the outer diameter of the joining member is coaxially provided on the joining member, an insertion hole is formed in the first member into which the joining member provided with the expanding diameter member is inserted, and an adhesive is filled into the insertion hole with the joining member provided with the expanding diameter member inserted into the insertion hole, thereby joining the first member and the second member.

[0008] According to the first configuration, the outer peripheral edge of the diameter expansion member provided on the joining member abuts against the inner surface of the insertion hole, and a gap of a size corresponding to at least the radial width of the diameter expansion member is formed between the outer peripheral surface of the joining member and the inner surface of the insertion hole. Then, adhesive is filled into this gap, and the thickness of the adhesive layer formed around the joining member is approximately uniform, so that high joining strength (shear rigidity) can be ensured when joining this wooden material.

[0009] In the first configuration, it is preferable that the diameter expansion member has a ring-shaped base attached to the joining member and protrusions protruding radially outward from the base at intervals in the circumferential direction (second configuration). According to the second configuration, gaps through which the adhesive can flow are formed between adjacent protrusions in the circumferential direction, so that the flow of the adhesive can be smoothly filled without being hindered by the diameter expansion member.

[0010] In the first and second configurations, a preferred configuration (third configuration) is one in which the second member is made of wood, a plate-shaped cavity is formed between the first and second members to be joined, a plate-shaped shear plate is fitted into the cavity, and the shear plate is fixed to the first and second members by pin-shaped fixing members that are in a twisted relationship with the joining members. According to the third configuration, the shear plate can suppress shear stress acting between the first and second members, both of which are made of wood, while the joining member can suppress moment loads acting between the first and second members, thereby increasing the rigidity between the two members and preventing deformation. [Effects of the Invention]

[0011] In the wood joining structure of the present invention, a joining member that joins a first member and a second member is provided with a coaxially extending member having a diameter larger than the outer diameter of the joining member, and the joining member with the extending member is inserted into an insertion hole formed in the first member and filled with adhesive, so that the outer peripheral edge of the extending member provided on the joining member abuts against the inner surface of the insertion hole, forming a gap between the outer peripheral surface of the joining member and the inner surface of the insertion hole, the gap being corresponding to the radial width of the extending member. The adhesive fills this gap, and the thickness of the adhesive layer formed around the joining member becomes nearly uniform, ensuring high joining strength (shear rigidity) when joining wood pieces. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a perspective view showing an embodiment of a wooden material joining structure according to the present invention; [Figure 2] (a) is a cross-sectional view taken along line II-II in Figure 1, and (b) is a cross-sectional view taken along line bb in (a). [Figure 3] FIG. 2 is a front view showing a joining member used in the wooden material joining structure shown in FIG. 1. [Figure 4] 4A and 4B show a diameter expansion member provided in the joining member shown in FIG. 3, where FIG. 4A is a side view and FIG. 4B is a cross-sectional view taken along line bb in FIG. [Figure 5] (a) is a cross-sectional view showing the state of adhesive filling in the wooden material joining structure shown in Figure 1, and (b) is a cross-sectional view showing the state of adhesive filling in a conventional structure. [Figure 6] (a) is a cross-sectional view showing a first modified example, and (b) is a cross-sectional view taken along line bb in (a). [Figure 7] (a) is a cross-sectional view showing a second modified example, and (b) is a cross-sectional view taken along line bb in (a). [Figure 8] (a) is a cross-sectional view showing a third modified example, and (b) is a cross-sectional view taken along line bb in (a). DETAILED DESCRIPTION OF THE INVENTION

[0013] An embodiment of a wooden material joint structure 1 according to the present invention will be described with reference to the drawings. As shown in Figures 1 and 2, this wooden material joint structure 1 has a first member 2 made of wooden material, a second member 3 also made of wooden material that is joined to the first member 2, and a rod-shaped joining member 4 that joins the first member 2 and the second member 3. In this embodiment, the first member 2 is a column member that extends in the vertical direction (hereinafter, the same reference numeral as the first member 2 will be used), and the second member 3 is a beam member that is joined to the column member 2 in the horizontal direction (hereinafter, the same reference numeral as the second member 3 will be used).

[0014] The column member 2 and the beam member 3 are formed with bottomed insertion holes 5 that extend horizontally across both members 2, 3 and into which joining members 4 are inserted. An injection / check hole 6 that penetrates the surface of the column member 2 or the beam member 3 is formed at the bottom of each insertion hole 5. In one embodiment, eight insertion holes 5 are formed in each of the column member 2 and the beam member 3. Note that, in FIG. 1, for ease of viewing the drawing, only the injection / check hole 6 that extends forward from the insertion hole 5 formed on the front side is shown, but as shown in FIG. 2(b), injection / check holes 6 that extend rearward from the insertion hole 5 formed on the rear side are also formed.

[0015] As shown in Fig. 3, the connecting member 4 is a rod made of a material having a predetermined strength, such as rolled steel for building structures (SS400, SNR490B, etc.), with a male thread 7 formed along its entire length. Diameter-expanding members 8 having a diameter larger than the outer diameter of the connecting member 4 are provided near both ends of the connecting member 4. The diameter-expanding members 8 have a ring-shaped base 9 attached to the connecting member 4, and protrusions 10 protruding radially outward from the base 9 at predetermined intervals in the circumferential direction.

[0016] 4(a) and 4(b), a female thread 11 is formed on the inner diameter side of the base 9 of the diameter expansion member 8, and this female thread 11 is screwed into the male thread 7 formed on the joining member 4. The protrusion 10 is configured as a part of a circle when viewed in the pipe axis direction. The maximum outer diameter of the diameter expansion member 8 is slightly smaller than the inner diameter of the insertion hole 5, so that the joining member 4 provided with the diameter expansion member 8 can be smoothly inserted into the insertion hole 5.

[0017] In this embodiment, circular protrusions 10 are formed at six locations at equal intervals in the circumferential direction, but the shape of the protrusions 10, the angular interval between adjacent protrusions 10, the number of formed protrusions, etc. can be changed as appropriate. Also, in this embodiment, the diameter expansion member 8 is configured to be screwed into the joining member 4, but the diameter expansion member 8 can also be configured to be fixed to the joining member 4 by fixing means such as adhesive or welding.

[0018] A cavity 12 is formed in the column member 2 and the beam member 3, spanning both members 2, 3. This cavity 12 is a thin-plate-like cavity that extends up and down and in the extension direction of the insertion hole 5 (horizontal direction), but is thin in the direction perpendicular to both of the above directions. Fixing member insertion holes 13 that penetrate the surface of the column member 2 or the beam member 3 are formed in the cavity 12 at three locations each in the column member 2 and the beam member 3. A thin, approximately square shear plate 14 is fitted into the cavity 12.

[0019] Six through holes 15 are formed in the shear plate 14, corresponding to the positions of the fixing member insertion holes 13 formed in the column member 2 and the beam member 3, respectively. After fitting the shear plate 14 into the cavity 12, pin-shaped fixing members 16, which are in a twisted relationship with the joining members 4, are fitted into the fixing member insertion holes 13 and through holes 15, thereby fixing the shear plate 14 to the column member 2 and the beam member 3. Note that in FIG. 1, for ease of viewing the drawing, only the portion of the fixing member insertion holes 13 formed on the front side of the cavity 12 is shown; however, as shown in FIG. 2(b), the fixing member insertion holes 13 also extend to the rear side of the cavity 12.

[0020] The construction procedure for the above-mentioned wooden joint structure 1 will now be described. First, the joining member 4 is inserted into the insertion hole 5 formed in the column member 2 or the beam member 3, and the shear plate 14 is inserted into the cavity 12. Next, adhesive 17 is injected into the insertion hole 5 from one of the injection and confirmation holes 6 formed at the bottom of the insertion hole 5 (for example, on the column member 2 side). As shown in FIG. 5(a), the injected adhesive 17 fills the gap between the inner surface of the insertion hole 5 and the outer periphery of the joining member 4, and once filling is complete, it flows out from the other injection and confirmation hole 6 formed in the insertion hole 5 (for example, on the beam member 3 side).

[0021] In this way, the adhesive 17 flows out from the other injection / check hole 6, allowing visual confirmation that the filling of the adhesive 17 has been completed. After the injection of the adhesive 17 is completed, it is preferable to apply a filler treatment to the injection / check hole 6 in terms of appearance. In this embodiment, an epoxy resin-based adhesive 17 is used as the adhesive 17, but other types of adhesive 17 can also be used as long as they perform the same function. Furthermore, the joining of the column member 2 and the beam member 3 is completed by inserting (press-fitting) the fixing member 16 into the fixing member insertion hole 13 formed in each of the column member 2 and the beam member 3.

[0022] In the above-described wooden material joining structure 1, a diameter-expanding member 8 having a diameter larger than the outer diameter of the joining member 4 is coaxially attached to the joining member 4, and insertion holes 5 are formed in the column member 2 and the beam member 3, into which the joining member 4 with the diameter-expanding member 8 is inserted. With the joining member 4 with the diameter-expanding member 8 inserted into the insertion hole 5, adhesive 17 is filled into the insertion hole 5 to join the column member 2 and the beam member 3. Therefore, the outer peripheral edge of the diameter-expanding member 8 attached to the joining member 4 abuts against the inner surface of the insertion hole 5, and a gap of at least a size corresponding to the radial width of the diameter-expanding member 8 is formed between the outer peripheral surface of the joining member 4 and the inner surface of the insertion hole 5. The adhesive 17 is also filled into this gap, and the thickness of the layer of adhesive 17 formed around the joining member 4 is approximately uniform. This ensures high joint strength (shear rigidity) when joining wooden materials.

[0023] Furthermore, in the above-described wood material joining structure 1, the diameter expanding member 8 has a ring-shaped base 9 attached to the joining member 4 and protrusions 10 protruding radially outward from the base 9 at intervals in the circumferential direction, so that gaps are formed between the protrusions 10 adjacent in the circumferential direction, allowing the adhesive 17 to flow. Therefore, the flow of the adhesive 17 is not hindered by the diameter expanding member 8, and the filling operation can be carried out smoothly.

[0024] Furthermore, in the above-mentioned wooden joint structure 1, both the column member 2 and the beam member 3 are made of wooden materials, a plate-shaped cavity 12 is formed across the joined column member 2 and beam member 3, a plate-shaped shear plate 14 is fitted into this cavity 12, and the shear plate 14 is fixed to the column member 2 and the beam member 3 by pin-shaped fixing members 16 that are in a twisted relationship with the connecting member 4. Therefore, the shear stress acting between the column member 2 and the beam member 3 can be suppressed by the shear plate 14, while the moment load acting between the column member 2 and the beam member 3 can be suppressed by the connecting member 4. This increases the rigidity between the two members 2, 3 and prevents deformation.

[0025] 6(a) and 6(b) show a first modified example of the wooden material joint structure 1 according to the present invention. The wooden material joint structure 1 according to the first modified example is basically the same as the structure according to the first embodiment, but differs in that only two joint members 4 are provided between the column member 2 and the beam member 3. When the moment load acting between the column member 2 and the beam member 3 is relatively small, the column member 2 and the beam member 3 can be joined with two joint members 4, which makes it possible to reduce material costs and processing costs while ensuring the required joint strength.

[0026] A second modified example of the wooden material joint structure 1 according to the present invention is shown in FIGS. 7(a) and 7(b). While the structures according to the first and second embodiments described above are for joining wooden materials (pillar member 2 and beam member 3), the wooden material joint structure 1 according to the second modified example relates to a joint structure between wooden materials (pillar member 2) and non-wood material (a concrete base 18 as the second member 3). The connecting member 4 used in the second modified example, like the first embodiment, is a rod with a male thread (not shown in FIG. 7(a)) formed along its entire length. An expansion member 8 is threaded into one end (upper end) of the connecting member 4, while an embedded nut 19 is threaded into the other end (lower end). The other end (embedded nut 19) of the connecting member 4 is embedded and fixed in the concrete base 18, with the other end extending upward from the concrete base 18.

[0027] The lower part of the pillar member 2 is formed with a bottomed through-hole 5 that opens to the underside and extends vertically. An injection / check hole 6 that penetrates the surface of the pillar member 2 is formed at the bottom of the through-hole 5. When constructing the wooden material joint structure 1 according to the second modified example, a joining member 4 is inserted into the through-hole 5 formed in the pillar member 2, and adhesive 17 is filled into the through-hole 5 through the injection / check hole 6 formed at the bottom of the through-hole 5. The adhesive 17 is then hardened to complete the joining of the concrete base 18 and the pillar member 2. The wooden material joint structure 1 according to the present invention can be smoothly joined to the pillar member 2 by using an appropriate joining member 4, even when one of the members is a non-wood material (in this modified example, the concrete base 18).

[0028] 8(a) and 8(b) show a third modified example of the wooden material joint structure 1 according to the present application. The wooden material joint structure 1 according to the third modified example is basically the same as the structure according to the second modified example, but differs in that only two connecting members 4 are provided between the concrete base 18 and the column member 2. When the moment load acting between the concrete base 18 and the column member 2 is relatively small, the concrete base 18 and the column member 2 can be joined with two connecting members 4, which makes it possible to reduce material costs and processing costs while ensuring the required joint strength.

[0029] The embodiments disclosed herein are to be considered in all respects as illustrative and not restrictive. Therefore, the scope of the present invention is defined by the claims, not by the above description, and is intended to include meanings equivalent to the claims and all modifications thereof. [Explanation of symbols]

[0030] 1 Wood material joint structure 2 First member (column member) 3 Second member (beam member) 4 Joint materials 5 Insertion hole 6 Injection and confirmation holes 7 Male thread 8. Expansion member 9 base 10 Protrusion 11 Female thread 12 Cavity 13 Fixing member insertion hole 14 Share Plate 15 through holes 16 Fixing member 17 Adhesive 18 Concrete base 19 Embedded Nut

Claims

1. A first member (2) made of wood material; a second member (3) joined to the first member (2); a rod-shaped joining member (4) having a male thread (7) formed along its entire length for joining the first member (2) and the second member (3); a diameter-expanding member (8) having a diameter larger than the outer diameter of the joining member (4) is provided coaxially with the joining member (4), the diameter-expanding member (8) has a ring-shaped base (9) having a female screw (11) formed on the inner diameter side attached to the joining member (4), and protrusions (10) protruding radially outward from the base (9) at intervals in the circumferential direction, and the female screw (11) is screwed into the male screw (7), A wooden material joining structure in which an insertion hole (5) is formed in the first member (2) and into which the joining member (4) provided with the diameter expansion member (8) is inserted, the joining member (4) provided with the diameter expansion member (8) is inserted into the insertion hole (5), the outer peripheral edge of the diameter expansion member (8) abuts against the inner surface of the insertion hole (5), and an adhesive (17) is filled into the insertion hole (5) in a state in which a gap of a size corresponding to at least the radial width of the diameter expansion member (8) is formed between the outer peripheral surface of the joining member (4) and the inner surface of the insertion hole (5), thereby joining the first member (2) and the second member (3), and an injection / check hole (6) penetrating the surface of the first member (2) or the second member (3) is formed at the bottom of the insertion hole (5).

2. 2. A wood material joining structure as described in claim 1, wherein the second member (3) is made of wood, a plate-shaped hollow portion (12) is formed across the first member (2) and the second member (3) to be joined, a plate-shaped shear plate (14) is fitted into the hollow portion (12), and the shear plate (14) is fixed to the first member (2) and the second member (3) by a pin-shaped fixing member (16) that is in a twisted positional relationship with the joining member (4).

Images