JP7554221B2 - Column base hardware and buildings using the same - Google Patents

Description

The present invention relates to column base hardware used in buildings made of wood, steel frame, reinforced concrete, and even mixed structures, and to buildings that use such column base hardware.

For example, Patent Documents 1 and 2 propose a column base hardware in which a base plate (referred to as the "base plate" in Patent Documents 1 and 2) is threaded through an anchor bolt protruding into the foundation concrete and fixed with a nut, and a second member connecting member (referred to as the "connecting plate" in Patent Documents 1 and 2) is erected on an upper plate (referred to as the "receiving plate" in Patent Documents 1 and 2) provided on the base plate via a leg plate (referred to as the "leg plate" in Patent Documents 1 and 2). A column base hardware is proposed to attach a wooden pillar or the like to the second member connecting member (referred to as the "connecting plate" in Patent Documents 1 and 2).

Patent No. 5323622 Patent No. 4384802

However, in the column base hardware disclosed in the above-mentioned Patent Documents 1 and 2, the leg plate and the base plate are simply joined by welding or the like, so if a large force acts on the column due to an earthquake or the like, the joint between the leg plate and the base plate may come apart, causing the column base hardware to break and potentially affecting the structural safety of the building itself.

In particular, the column base hardware described in Patent Document 1 has a position fixing part that fixes the position of the washer so that the center of the washer is located at the center of the base plate when the anchor bolt is fixed to the base plate with a nut. Therefore, for example, when the column base hardware is pulled upward, the base plate is deformed so that it curves upward from the part where the anchor bolt is fixed with the nut to the end side, and the position fixing part is moved toward the center and falls off, or the connection between the base plate and one of the leg plates is broken, which may cause the column base hardware to be destroyed. In addition, when a load is applied to the column base hardware from the side, the base plate, leg plate, and upper plate are deformed to form a parallelogram, and a large load is applied to the position fixing part through the washer, which may cause the position fixing part to fall off, etc., and the column base hardware may be destroyed. Furthermore, when the hardware is used for the side column base of a load-bearing wall, the above-mentioned tensile force and horizontal force are applied to the hardware at the same time, so the position fixing part may fall off, etc., and the column base hardware may be destroyed.

In general, the performance of column base hardware is often determined by the fracture of welds, and when the base plate deforms, the stress generated in the welds increases, making it more likely that the performance will be determined by the fracture of the welds. Therefore, measures such as increasing the thickness of the base plate or increasing the strength of the welds are necessary, but the former leads to increased costs, while the latter is difficult to increase the amount of welding (leg length) because the area that can be welded is limited. One possible method is to make a groove and perform a complete weld, but this also leads to the problem of increased costs.

Therefore, the present invention was made with a focus on these problems, and aims to provide a column base metal that can improve strength without increasing costs, and a building that uses the column base metal.

In order to solve the above-mentioned problems, the column base hardware of the present invention comprises a base plate having a bolt hole through which a bolt extending from a first member passes, a pair of leg plates which are curved in a planar view and have a predetermined height and are provided on the upper surface side of the base plate, an upper plate which is provided so as to face the base plate via the pair of leg plates, and a second member connecting member which is provided on the upper surface side of the upper plate and to which a second member is connected, and is characterized in that the base plate is provided with a pair of fitting holes for the leg plates which are curved in a planar view and into which part or all of the lower end portions of each of the pair of leg plates which are curved in a planar view fit.
In addition, in the column base hardware of the present invention, the lower end of the leg plate is provided with a base plate engaging convex portion that fits into the leg plate engaging hole and is joined to the base plate, and a base plate upper surface joint portion that does not fit into the leg plate engaging hole but contacts the upper surface of the base plate and is joined to the upper surface of the base plate, the protruding length of the base plate engaging convex portion from the base plate upper surface joint portion is less than the thickness of the base plate, the base plate engaging convex portion is engaged into the leg plate engaging hole , and the lower end of the base plate engaging convex portion that is exposed by engaging with the leg plate engaging hole from the back side of the base plate is welded to the leg plate engaging hole.
In addition, the column base hardware of the present invention is also characterized in that the upper plate is provided with a second member connecting member through hole through which part or all of the lower end part of the second member connecting member passes, while the upper part of the foot plate is provided with a connecting plate fitting recess into which the lower part of the second member connecting member that has passed through the second member connecting member through hole fits.
In addition, the column base hardware of the present invention is also characterized in that a position fixing portion is provided on the base plate which abuts against the side of the washer to fix the position of the washer so that the center of the washer is located at the center of the base plate.
In addition, the structure of the present invention is characterized in that the bolt extending from the first member, which is a concrete member, is passed through the bolt hole of the base plate of any of the above-mentioned column base hardware, and the bolt protruding from the bolt hole is screwed with a nut to fix the column base hardware to the concrete member, while the second member connecting member provided on the upper surface side of the upper plate of the column base hardware connects to the second member, which is the column, thereby providing a column on the concrete member using the column base hardware .

In the present invention, a fitting hole for the leg plate is provided in the base plate into which part or all of the lower end of the leg plate fits, thereby improving assembly accuracy such as vertical alignment of the leg plate relative to the base plate and improving the joint strength between the base plate and the leg plate, thereby improving the rigidity of the entire column base hardware.
In addition, since the leg plate is fitted to the base plate, deformation of the leg plate can be suppressed when an external force is applied, which is particularly effective against lateral external forces.
In addition, all or part of the lower end of the leg plate fits into the leg plate fitting hole in the base plate, making it possible to weld from the back side of the base plate and increasing the amount of welding, thereby improving the joint strength between the base plate and the leg plate without increasing costs and thereby improving the rigidity of the entire column base hardware.

1 is a front view showing the use state of a column base hardware according to an embodiment of the present invention. FIG. 1 is an exploded perspective view showing the configuration of a column base hardware according to an embodiment of the present invention; 1 is an oblique view of a column base hardware according to an embodiment of the present invention; 1A to 1D are respectively a plan view, a cross-sectional view along line AA, a view from direction B, and a cross-sectional view along line CC of a base plate that constitutes a column base hardware according to an embodiment of the present invention. 1A to 1D are respectively a front view, a plan view, a cross-sectional view along line D-D, and a bottom view of a leg plate that constitutes a column base hardware of an embodiment of the present invention. 1A to 1C are a plan view, a front view, and a cross-sectional view along line E-E of an upper plate that constitutes an embodiment of a column base fitting according to the present invention, respectively. 1A to 1C are respectively a front view, a bottom view, and a cross-sectional view along line FF of a second member connecting member that constitutes a column base hardware of an embodiment of the present invention. 1A to 1C are a plan view, a front view, and a cross-sectional view along line GG of a washer constituting a column base hardware according to an embodiment of the present invention. 9(a) and (b) are respectively a front view showing the welded portion between the base plate and the upper plate in a column base hardware according to an embodiment of the present invention, and an enlarged cross-sectional view of part H in FIG. 9(a). (a) and (b) are respectively a bottom view showing the welded portion between the base plate and the foot plate on the back surface of the base plate in a column base hardware of an embodiment of the present invention, and a plan view showing the welded portion between the base plate and the foot plate on the top surface of the base plate. 1A and 1B are respectively a diagram showing the welded portion on the underside of the upper plate in a column base hardware according to an embodiment of the present invention, and a side view showing the welded portion between the base plate and the upper plate.

The following describes in detail the column base hardware 1 according to the embodiment of the present invention with reference to the attached drawings. In the embodiment described below, the column base hardware 1 for wooden buildings is described as an example in which the first member is foundation concrete 2 and a column 6 or the like is attached to an anchor bolt 3 extending from the foundation concrete 2. However, the following embodiment, including its dimensions, is merely one example of the present invention, and the present invention is not limited to the following embodiment, and can be modified as appropriate within the scope of the technical concept of the present invention.

<Configuration of column base hardware 1 etc. according to the embodiment>
The column base hardware 1 of the embodiment is an architectural hardware for installing a column 6 or the like on a concrete foundation 2, which is fixed by a nut 5 via a washer 4 to an anchor bolt 3 extending from the concrete foundation 2 as shown in Fig. 1, and is configured by joining a base plate 11, a pair of leg plates 12, 12, an upper plate 13, and a second member connecting plate 14 by assembly welding as shown in Fig. 2 and Fig. 3, and is used as a set with the washer 4. Note that the washer 4 is not an essential component of the present invention.

(Base plate 11)
The base plate 11 is a plate placed on the upper surface of the foundation concrete 2, and as shown in Figures 4 (a) to (d), is formed, for example, from a steel plate having a thickness T1 and has a substantially square shape in plan view.

The base plate 11 has an anchor bolt insertion hole 11a in the center, with an inner diameter R1 that is approximately twice the diameter (outer diameter) R3 (see Figure 1) of the anchor bolt 3, through which the anchor bolt 3 extending from the foundation concrete 2 can be passed. Four position fixing parts 11b are provided around the anchor bolt insertion hole 11a, spaced apart from each other and arranged on a circumference whose diameter is the outer diameter R2 of the washer 4 (see Figure 8), and function as positioning parts for the washer 4.

The four position fixing parts 11b are provided on the diagonal lines of the base plate 11 as shown in FIG. 4(a), and are formed to protrude about a height H1 from the upper surface of the base plate 11 as shown in FIG. 4(c) etc. The height H1 of the position fixing parts 11b is smaller than the thickness T5 of the washer 4 (see FIG. 8(b)).

In addition, the base plate 11 is provided with a pair of leg plate fitting holes 11c, 11c into which the base plate fitting protrusions 12a (see Figure 5), which are part of the lower end of the pair of leg plates 12, 12, described below, fit.

Here, the pair of leg plates 12, 12 are each curved in plan view, so the pair of leg plate fitting holes 11c, 11c are also curved in plan view.

In addition, in the middle of each side of the base plate 11, which corresponds to the four sides, there is a marking portion 11d to mark the center line when installing the base plate 11.

(Pair of leg plates 12, 12)
As shown in Figures 5(a) to (d), the pair of leg plates 12 are formed, for example, by curving a steel plate having a thickness of T2 (T2<T1) in a planar view, and the lower ends of the pair of leg plates 12 are each provided with a base plate fitting convex portion 12a which protrudes downwardly by a predetermined width by a length H2 (H2<T1) and fits into the leg plate fitting hole 11c of the base plate 11 (see Figure 4, etc.), and base plate upper surface joint portions 12b, 12b which do not fit into the leg plate fitting hole 11c but come into contact with and are joined to the upper surface of the base plate 11.

As shown in FIG. 5(a), the base plate fitting protrusion 12a protrudes from the base plate upper surface joints 12b, 12b by a length H2 (H2<T1). Therefore, even if it fits into the leg plate fitting holes 11c, 11c of the base plate 11 having a thickness T1, a recess (groove) of (T1-H2) is formed in the leg plate fitting holes 11c, 11c on the back side of the base plate 11. Therefore, even if the base plate fitting protrusion 12a of the leg plate 12 and the leg plate fitting holes 11c of the base plate 11 are welded in the recess (groove), as shown in FIG. 9(b) and other figures described later, it is possible to prevent the welded part from protruding from the bottom surface (lower surface) of the base plate 11 as much as possible.

The upper end of the leg plate 12 is provided with a connecting plate fitting recess 12c of depth D1 and width W1 equal to the thickness T4 of the second member connecting plate 14, into which the connecting plate lower side protrusions 14b (see FIG. 7) of the lower end of the second member connecting plate 14 that pass through the connecting plate through hole 13a (see FIG. 6) of the upper plate 13, which will be described later, fit.

(Upper plate 13)
The upper plate 13 is formed from a steel plate that is approximately square in plan view, the same as the base plate 11, as shown in Figures 6 (a) to (c), and has a connecting plate through-hole 13a in its center that has a width W2 (= W1 = T4) and length L1 to allow the connecting plate lower side convex portions 14b, which are part of the lower end of the second member connecting plate 14, to pass through.

The upper plate 13 is made of a steel plate with a thickness T3 that is thinner than the base plate 11 with a thickness T1, and has the same thickness as the leg plate 12 with a thickness T2, etc.

(Second member connecting plate 14)
As shown in Figures 7(a) to (c), the second member connecting plate 14 is made of a steel plate of thickness T4 (= W1 = W2) and is formed in a roughly rectangular shape when viewed from the front with a specified width and height, and the left and right corners of the upper end are rounded off to make it easier to insert it into the slit formed in the pillar 6 (see Figure 1).

And to connect to the pillar (see Figure 1) with a bolt (not shown) or drift pin (not shown), etc., eight pin insertion holes 14a with an inner diameter R6 that matches the shaft diameter of the bolt (not shown) or drift pin (not shown) are provided as shown in Figure 7 (a).

The lower end of the second member connecting plate 14 is provided with connecting plate lower side convex portions 14b, 14b on both sides that pass through the connecting plate through hole 13a of the upper plate 13 and fit into the connecting plate fitting recesses 12c, 12c at the upper ends of the pair of leg plates 12, 12 (see Figures 5(a) and (b), etc.), the connecting plate lower central recess 14c is sandwiched between the connecting plate lower side convex portions 14b, 14b and is recessed in a trapezoidal shape in the center, and the upper plate upper surface joint portions 14d, 14d are provided on both sides of the connecting plate lower side convex portions 14b, 14b, respectively, and are joined to the upper surface of the upper plate 13 without fitting into the connecting plate fitting recesses 12c, 12c.

As shown in FIG. 7(a), the sum W3 of the width of the lower connecting plate side convex parts 14b, 14b and the width of the lower connecting plate central concave part 14c between them is the same as the length L1 (see FIG. 6(a)) of the connecting plate through hole 13a of the upper plate 13, and the thickness T4 of the lower connecting plate side convex parts 14b, 14b is the same as the width W2 (see FIG. 6(a)) of the connecting plate through hole 13a, so that the lower connecting plate side convex parts 14b, 14b and the lower connecting plate central concave part 14c fit into the connecting plate through hole 13a of the upper plate 13. Also, although W3 is smaller than the width W4 of the second member connecting plate 14, it is larger than the value obtained by subtracting the inner diameter R6 of the two pin insertion holes 14a from the width W4 of the second member connecting plate 14, so that the relationship W4>W3>(W4-2*R6) is established. This is because the second member connecting plate 14 has a constant thickness, and so the strength is inevitably reduced in narrower widths and in the areas where the pin insertion holes 14a are provided. Therefore, the strength of the lower two convex portions 14b, 14b of the connecting plate having width W3 and the lower central concave portion 14c of the connecting plate is improved compared to the area where the width of the steel plate is effectively (W4-2 x R6) by providing the two pin insertion holes 14a, which have the lowest strength in the area with width W4 of the second member connecting plate 14.

The protruding length H3 of the lower two-sided convex portions 14b, 14b of the connecting plate relative to the upper surface joints 14d, 14d of the upper plate is set to be the same as the sum of the thickness T3 of the upper plate 13 (see FIG. 6(b)) and the depth D1 of the connecting plate fitting recess 12c at the upper end of the leg plate 12 (see FIG. 5(a)) so that the lower two-sided convex portions 14b, 14b of the connecting plate pass through the connecting plate through-hole 13a of the upper plate 13 and fit into the connecting plate fitting recess 12c at the upper end of the leg plate 12.

The protruding length H4 of the lower central recess 14c of the connecting plate relative to the upper surface joints 14d, 14d of the upper plate is set to be greater than the thickness T3 of the upper plate 13 (see FIG. 6(b)) so that the lower central recess 14c of the connecting plate protrudes to the underside of the upper plate 13 through the connecting plate through-hole 13a of the upper plate 13. However, as shown in FIG. 7(a) etc., the protruding length H4 of the lower central recess 14c of the connecting plate is smaller than the protruding length H3 of the lower both side protrusions 14b, 14b of the connecting plate, so the relationship H3>H4>T3 is established.

The reason for providing the trapezoidally recessed central recess 14c of the lower connecting plate between the protruding ends 14b, 14b for fitting the second member connecting plate, i.e., the reason for making H3 > H4, is that in the embodiment of the column base hardware 1, the protruding ends 14b, 14b for fitting the wood connecting plate and the central recess 14c of the lower connecting plate protrude from the connecting plate through hole 13a of the upper plate 13 to the underside of the base plate 11, and this ensures a working space for a tool (not shown) that tightens the tip of the anchor bolt 3 protruding from the anchor bolt insertion hole 11a with the nut 5.

(Washer 4)
8(a) to 8(c), for example, the washer 4 is made of a steel plate whose thickness T5 is the same as the thickness T1 of the base plate 11 (see FIG. 4(b)), and is formed in a circular shape with an outer diameter R2, and is provided with an eccentric anchor bolt insertion hole 41 having an elongated hole shape eccentric from the center, which is a so-called through hole (blind hole). In this embodiment, the diameter of the anchor bolt 3 is R3 (see FIG. 1), and the diameter R1 of the anchor bolt insertion hole 11a formed in the base plate 11 is about twice the diameter R3 of the anchor bolt 3, so that the minor axis R4 of the elongated anchor bolt insertion hole 41 formed in the washer 4 is slightly larger than the diameter R3 of the anchor bolt 3, and the major axis R5 is about 1.5 times the diameter R3 of the anchor bolt 3.

As a result, even if the anchor bolt 3 protruding from the foundation concrete 2 does not extend from the center of the base plate 11 and is misaligned from the center of the base plate 11, the washer 4 installed at the center of the base plate 11 can be rotated according to the four position fixing parts 11b to absorb the misalignment of the anchor bolt 3 and install the washer 4 at the center of the base plate 11 while passing the anchor bolt 3 through. Therefore, when an external force is applied to the base plate 11 in the vertical or diagonal direction, the external force is applied to the base plate 11 in a balanced manner via the washer 4 at the center of the base plate 11, so not only is the base plate 11 stably fixed, but floating of the base plate 11 and misalignment of the washer 4 relative to the base plate 11 can be more reliably prevented.

The back side of the washer 4 may be provided with an anti-slip portion (not shown) formed by a mesh engraved line or a matte finish.

<Welding of column base hardware 1 according to the embodiment>
Next, the welding of the column base hardware 1 according to the embodiment configured as above will be described with reference to the drawings. Note that in the drawings, the welded parts are indicated by grid lines.

(Welding of the base plate 11 and the leg plates 12, 12 on the back surface of the base plate 11)
The base plate 11 is provided with leg plate fitting holes 11c, 11c as shown in Figures 4(a) to (d), and the leg plate fitting holes 11c, 11c are designed to receive base plate fitting protrusions 12a, 12a on the lower part of the leg plates 12, 12, as shown in Figures 9(a) and (b), etc. Therefore, the base plate 11 and the leg plates 12, 12 are welded from the back side of the base plate 11 at the leg plate fitting holes 11c, 11c on the back side of the base plate 11, as shown in Figures 9(a), (b) and 10(a).

As described above, the protruding length H2 (see FIG. 5(a)) of the base plate fitting convex portion 12a relative to the base plate upper surface joint portions 12b, 12b is smaller than the thickness T1 (see FIG. 4(b)) of the base plate 11. Therefore, even if the base plate fitting convex portion 12a is fitted into the leg plate fitting hole 11c of the base plate 11, a recess (groove) of depth (T1-H2) remains in the leg plate fitting hole 11c on the back side of the base plate 11 as shown in FIGS. 9(a) and (b). Therefore, the base plate 11 and the leg plates 12, 12 are welded to each other by fillet welding or the like in this recess (groove) as shown in FIGS. 9(a) and (b) and FIG. 10(a).

Therefore, in the column base hardware 1 of the embodiment, unlike the conventional technologies of Patent Documents 1 and 2, welding can be performed between the base plate 11 and the foot plates 12, 12 even at the foot plate fitting holes 11c, 11c on the back surface of the base plate 11, thereby improving the joint strength between the base plate 11 and the foot plates 12, 12, and as a result, improving the joint strength of the entire column base hardware 1.

If the excess portion protrudes from the underside of the base plate 11 during welding at the leg plate fitting holes 11c, 11c, the excess portion protruding from the underside of the base plate 11 is scraped off from the back side with a sander or the like to make it flush with the back side of the base plate 11 as shown in Figures 9(a) and (b).

(Welding of the base plate 11 and the leg plates 12, 12 on the upper surface of the base plate 11)
On the top surface of the base plate 11, as shown in Figures 9(a) and (b), the base plate fitting protrusions 12a, 12a of each of the leg plates 12, 12 are inserted approximately halfway into the leg plate fitting holes 11c, 11c of the base plate 11 to fit together, and therefore, as shown in Figures 9(a) and (b) and Figure 10(b), the fitting portions with the leg plates 12, 12 on the top surface of the base plate 11 are welded all the way around, for example by fillet welding.

(Welding of the second member connecting plate 14 and the upper plate 13)
The welding of the second member connecting plate 14 to the upper plate 13 is performed on the lower surface side of the upper plate 13 as shown in FIGS. 11( a ) and 11 ( b ), and is not performed on the upper surface side of the upper plate 13 .

Specifically, as shown in Figures 2 and 3, the lower connecting plate side convex portions 14b, 14b and the lower connecting plate central concave portion 14c of the lower end of the second member connecting plate 14 are inserted into and penetrate the connecting plate through hole 13a of the upper plate 13 and protrude from the underside of the upper plate 13, so as shown in Figures 9(a), 11(a) and (b), the lower connecting plate side convex portions 14b, 14b and the lower connecting plate central concave portion 14c of the lower end of the second member connecting plate 14 protruding from the underside of the upper plate 13 are welded to the periphery of the connecting plate through hole 13a of the upper plate 13.

(Welding of leg plates 12, 12 to upper plate 13)
As is clear from Figures 2 and 3, the upper end surfaces of the leg plates 12, 12 abut the underside of the upper plate 13, and therefore the leg plates 12, 12 are welded to the upper plate 13 by fillet welding or the like on the periphery of the abutment between the upper end surfaces of the leg plates 12, 12 and the underside of the upper plate 13, as shown in Figures 11(a) and (b).

(Welding of the second member connecting plate 14 and the leg plates 12, 12)
As described above, the lower two side convex portions 14b, 14b of the connecting plate and the lower central concave portion 14c of the connecting plate at the lower end of the second member connecting plate 14 are inserted into and pass through the connecting plate through hole 13a of the upper plate 13, and the lower two side convex portions 14b, 14b of the connecting plate engage with the connecting plate engaging concave portions 12c, 12c of the leg plates 12, 12, respectively. Therefore, the welded portions of the second member connecting plate 14 and the leg plates 12, 12 are welded by fillet welding or the like on both sides of the engaging portion, which is the inner side (see Figure 9(a)), which is the convex side of the leg plates 12, 12, and the outer side (see Figure 11(b)), which is the concave side, as shown in Figures 9(a), 11(a) and 11(b).

In addition, in the conventional column base hardware of Patent Documents 1 and 2, the lower end of the second member connecting plate (referred to as the "connecting plate" in Patent Documents 1 and 2) is inserted into and penetrates the connecting plate through hole of the upper plate (referred to as the "receiving plate" in Patent Documents 1 and 2) and protrudes from the underside of the upper plate, but it protrudes only between the pair of leg plates (referred to as the "leg plates" in Patent Documents 1 and 2), and is therefore welded only at the contact points between the lower end of the second member connecting plate and the inner side (convex side) of each leg plate.

Therefore, in the column base hardware 1 of this embodiment, not only do the convex portions 14b, 14b at both ends for fitting the second member connecting plate fit into the concave portions 12c, 12c for fitting the connecting plate of the leg plates 12, 12 fit into each other, but the welded portion (weld length) between the lower end of the second member connecting plate 14 and the leg plates 12, 12 is almost twice as long as that of the conventional column base hardware of Patent Documents 1 and 2, and therefore the strength of the entire column base hardware 1 can be improved in these respects.

The sum W3 of the width of the lower two convex portions 14b, 14b of the connecting plate and the width of the lower central concave portion 14c of the connecting plate is smaller than the width W4 of the second member connecting plate 14, and is larger than the width W4 of the second member connecting plate 14 minus the inner diameter R6 of the two pin insertion holes 14a, so that the relationship W4>W3>(W4-2.R6) is established.

As a result, in the conventional column base hardware described in Patent Documents 1 and 2, in which the lower end of the second member connecting plate is housed between a pair of leg plates, the width of the lower end of the second member connecting plate ("connecting plate" in Patent Documents 1 and 2) is the width between the inner surfaces of the pair of leg plates ("leg plates" in Patent Documents 1 and 2). However, in this embodiment, by fitting the second member connecting plate 14 into the connecting plate fitting recesses 12c, 12c, the sum W3 of the width of the lower end of the second member connecting plate 14, which is the width of the connecting plate lower both side convex portions 14b, 14b and the width of the connecting plate lower central recess 14c, can be secured to be larger than the width between the inner surfaces of the pair of leg plates 12, 12. Furthermore, the width of the steel material can be widened so that it is larger than the value obtained by subtracting the inner diameter R6 of the two pin insertion holes 14a from the width W4 of the second member connecting plate 14, thereby improving the strength of the second member connecting plate 14 itself, and as a result, the joint strength of the entire column base hardware 1 can be improved.

<Summary of the column base hardware 1 according to the embodiment of the present invention>
As described above, in the column base hardware 1 of the embodiment of the present invention, the base plate 11 is provided with an anchor bolt insertion hole 11a through which the anchor bolt 3 extending from the foundation concrete 2 passes, and is provided with a pair of leg plate fitting holes 11c, 11c into which the base plate fitting protrusions 12a of each of the pair of leg plates 12, 12 fit.

Therefore, the pair of leg plates 12, 12 are joined by fitting the base plate fitting protrusions 12a, 12a of each leg plate into the pair of leg plate fitting holes 11c, 11c of the base plate 11, improving the assembly precision such as vertical alignment of the pair of leg plates 12, 12 to the base plate 11, and the joint strength between the base plate 11 and the leg plates 12, 12 is also improved by the fitting, improving the rigidity of the entire column base hardware 1, and using this column base hardware 1 to improve the strength of the entire wooden building in which the column 6 is placed on the foundation concrete 2.

In particular, the joint strength between the base plate 11 and the leg plates 12, 12 is improved, which makes it possible to prevent as much as possible the situation where the joint between the base plate 11 and one of the leg plates 12 breaks and one side of the base plate 11 is pulled upward, causing the base plate 11 to bend and the position fixing part 11b to fall off due to the washer 4. In this respect, too, the rigidity of the entire column base hardware 1 can be improved, and the strength of the entire wooden building in which this column base hardware 1 is used can be improved.

In addition, the leg plate fitting holes 11c, 11c penetrate the front and back of the base plate 11, and when the base plate fitting protrusions 12a, 12a of a pair of leg plates 12, 12 fit into the leg plate fitting holes 11c, 11c, respectively, welding can be performed from the back side of the base plate 11 to increase the amount of welding, thereby improving the joint strength between the base plate 11 and the leg plates 12, 12 without increasing costs, thereby improving the rigidity of the entire column base hardware 1.

In addition, in the column base hardware 1 according to the embodiment of the present invention, the lower end of the leg plate 12 is provided with a base plate fitting protrusion 12a that fits into the leg plate fitting hole 11c and is joined to the base plate 11, and a base plate upper surface joint portion 12b that does not fit into the leg plate fitting hole 11c and is joined in contact with the upper surface of the base plate 11. The protruding length H2 of 12a (see FIG. 5(a)) is smaller than the thickness T1 of the base plate 11 (see FIG. 4(b)). Therefore, after fitting the base plate fitting protrusions 12a, 12a into the leg plate fitting holes 11c, 11c, the lower ends of the base plate fitting protrusions 12a, 12a that are exposed by fitting into the leg plate fitting holes 11c, 11c from the back side of the base plate 11 are welded to the pair of leg plate fitting holes 11c, 11c.

Therefore, when the pair of leg plate fitting holes 11c, 11c are used to weld the pair of leg plates 12, 12 to the base plate 11 from the back side of the base plate 11, the recesses formed in the leg plate fitting holes 11c, 11c on the back side of the base plate 11 serve as space for the weld, allowing for reliable welding. This also improves the joint strength between the base plate 11 and the pair of leg plates 12, 12, improving the rigidity of the entire column base hardware 1.

In addition, in the column base hardware 1 of the embodiment of the present invention, the upper plate 13 is provided with a connecting plate through hole 13a through which the lower end of the second member connecting plate 14 passes, while the upper part of the pair of leg plates 12, 12 is provided with a connecting plate fitting recess 12c into which the lower part of the second member connecting plate 14 that has passed through the connecting plate through hole 13a fits.

Therefore, the second member connecting plate 14 and the leg plates 12, 12 are not only joined by welding or the like as in the conventional column base hardware of Patent Documents 1 and 2, but are further fitted together via the connecting plate fitting recess 12c, and the fitting portion of the leg plates 12, 12 is welded on the inside and outside to ensure a long weld length, which improves the joint strength between the second member connecting plate 14 and the leg plates 12, 12 and improves the rigidity of the entire column base hardware 1.

In addition, in the column base hardware 1 of the embodiment of the present invention, a position fixing portion 11b is provided on the base plate 11, which abuts against the side of the washer 4 to fix the position of the washer 4 so that the center of the washer 4 is located at the center of the base plate 11.

Therefore, by fixing the position of the washer 4 with the position fixing portion 11b, the rigidity of the entire column base hardware 1 can be improved, and the strength of the entire wooden building using this column base hardware 1 can be improved. In addition, the presence of the position fixing portion 11b makes it easier to position the washer 4. Furthermore, by pushing out the position fixing portion 11b significantly, the contact area with the washer 4 increases, improving the force fixing the washer 4 and further suppressing deformation of the base plate 11, thereby preventing weld breakage due to deformation, thereby improving the rigidity of the entire column base hardware 1 and improving the strength of the entire wooden building using this column base hardware 1.

In the above embodiment, the leg plate fitting holes 11c, 11c of the base plate 11 are described as being formed to fit the base plate fitting protrusions 12a, which are part of the lower end of the leg plates 12, 12, in order to ensure the appropriate fitting depth and the distance from the leg plate fitting holes 11c, 11c of the base plate 11 to the end of the base plate 11 (maintaining the strength of the base plate 11 itself appropriately). However, the present invention is not limited to this, and it is of course possible to configure the lower end of the leg plates 12, 12 to fit the entire lower end of the leg plates 12, 12 into the leg plate fitting holes 11c, 11c without dividing the lower end of the leg plates 12, 12 into the base plate fitting protrusions 12a and the base plate upper surface joints 12b, 12b on both sides of them.

In addition, in the above embodiment, the upper plate 13 is described as having a connecting plate through hole 13a through which a pair of connecting plate lower side convex portions 14b, 14b, which are part of the lower end of the second member connecting plate 14, and a connecting plate lower central concave portion 14c pass, but the present invention is not limited to this, and it is of course also possible to configure the lower end of the second member connecting plate 14 so that the entire lower end of the second member connecting plate 14 passes through the connecting plate through hole 13a without providing the connecting plate lower side convex portions 14b, 14b, the connecting plate lower central concave portion 14c, and the upper plate upper surface joint portion 14d.

In the above embodiment, the pin insertion holes 14a in the second member connecting plate 14 are arranged in a horizontal direction from top to bottom in a repeated order of 2, 1, 2, etc., for a total of 8. However, the present invention is not limited to this. Since the width W4 of the second member connecting plate 14 changes depending on the width of the column to be provided using the column base hardware according to the present invention, the number of pin insertion holes 14a in the second member connecting plate 14 also changes, and the number of pin insertion holes 14a arranged in the horizontal direction may be other than 2. In this case, if the number of pin insertion holes arranged in the horizontal direction is n (n is a natural number), the relationship between the width W4 of the second member connecting plate 14 and the sum W3 of the widths of the lower two convex portions 14b, 14b of the connecting plate of the second member connecting plate 14 and the width of the lower central concave portion 14c of the connecting plate is W4>W3>(W4-n.R6). Also, considering the case where W4 = W3 without providing the upper plate upper surface joint 14d, etc., or the case where W3 = (W4-n・R6), it is desirable that the relationship between the width W4 of the second member connecting plate 14 in the present invention and the sum W3 of the width of the lower side convex portions 14b, 14b of the connecting plate of the second member connecting plate 14 and the width of the lower central concave portion 14c of the connecting plate is configured so that the relationship W4 ≧ W3 ≧ (W4-n・R6) holds.

In addition, in the above embodiment, the first member is a concrete foundation 2, and a column 6 or the like is attached to an anchor bolt 3 extending from the concrete foundation 2. The column base hardware of the present invention is not limited to wooden buildings. For example, columns and beams of reinforced concrete construction, and columns and beams of steel frame construction can also be used as the first member. It can also be used for column base hardware of reinforced concrete construction, steel frame construction, and even mixed structures of these. The second connecting member can be used not only for wood but also for steel plates, etc.

In addition, in the above embodiment, the anchor bolt 3 extending from the concrete foundation 2 was used as an example of a bolt that is inserted into the base plate of the column base hardware, but since the column base hardware of the present invention targets materials other than the concrete foundation 2 as the first member, the present invention can of course use bolts other than the anchor bolt 3.

In addition, in the above embodiment, the second member connecting member is a plate-shaped second member connecting plate 14, and the second member connecting plate 14 and the second member, the column 6, are connected by a drift pin (not shown) or the like. However, the present invention is not limited to this, and the second member connecting member may be, for example, a rod-shaped member such as a lag screw bolt (LSB), a cylindrical member such as a pipe or a groove-in rod (GIR), or a block-shaped member. The connection between the second member connecting member and the second member, such as the column 6, is not limited to a drift pin, and a connecting material such as a bolt may be used.

REFERENCE SIGNS LIST 1 Column base hardware 11 Base plate 11a Anchor bolt insertion hole 11b Position fixing portion 11c Foot plate fitting hole 11d Scribed portion 12 Foot plate 12a Base plate fitting convex portion 12b Base plate upper surface joint portion 12c Connection plate fitting concave portion 13 Upper plate 13a Connection plate through hole (second member connection member through hole)
14 Second member connecting plate (second member connecting member)
14a Pin insertion hole 14b Convex portions on both sides of lower portion of connecting plate 14c Concave portion in the center of lower portion of connecting plate 14d Upper surface joint portion of upper plate 2 Foundation concrete (first member)
3 Anchor bolt 4 Washer 41 Eccentric hole for inserting anchor bolt 5 Nut 6 Pillar (second member)

Claims (5)

a base plate having a bolt hole through which a bolt extending from the first member passes;
A pair of leg plates that are curved in a plan view and have a predetermined height and are provided on an upper surface side of the base plate;
an upper plate provided to face the base plate via the pair of leg plates;
a second member connecting member provided on an upper surface side of the upper plate and to which a second member is connected;
The column base hardware is characterized in that the base plate is provided with a pair of fitting holes for leg plates that are curved in a plan view , into which part or all of the lower end portions of each of the pair of leg plates that are curved in a plan view fit. The column base hardware according to claim 1,
a base plate fitting protrusion that fits into the foot plate fitting hole and is joined to the base plate; and a base plate upper surface joining portion that does not fit into the foot plate fitting hole and is in contact with the upper surface of the base plate and is joined to the upper surface of the base plate;
A column base hardware characterized in that the protruding length of the base plate engaging convex portion relative to the base plate upper surface joint is less than the thickness of the base plate, the base plate engaging convex portion is engaged with the foot plate engaging hole, and the lower end of the base plate engaging convex portion that is exposed by engaging with the foot plate engaging hole from the back side of the base plate is welded to the foot plate engaging hole. In the column base hardware according to claim 1 or 2,
The upper plate is provided with a second member connecting member through hole through which a part or the whole of a lower end portion of the second member connecting member passes,
A column base hardware characterized in that the upper part of the leg plate has a connecting plate fitting recess into which the lower part of the second member connecting member that has passed through the second member connecting member through hole fits. In the column base hardware according to any one of claims 1 to 3,
A column base hardware characterized in that a position fixing portion is provided on the base plate which abuts against the side of the washer to fix the position of the washer so that the center of the washer is located at the center of the base plate. The bolt extending from the first member, which is a concrete member, is passed through the bolt hole of the base plate of the column base hardware according to any one of claims 1 to 4, and the bolt protruding from the bolt hole is screwed with a nut to fix the column base hardware to the concrete member,
A structure characterized in that a column is supported on a concrete member using the column base hardware by connecting the second member connecting member provided on the upper surface side of the upper plate of the column base hardware to the second member, which is a column .

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