Column base hardware and building

Abstract

To enhance overall strength of a column base hardware by significantly increasing weld length between a shaft section and a base section while utilizing the shaft section which is a rod-shaped or pipe-shaped column insertion member that facilitates pre-cutting on a column material side.SOLUTION: A column base hardware comprises: a base portion 11; and a shaft portion 12 which is provided on the base portion 11 and inserted into a shaft insertion portion provided at the lower end of a column material, and provided with a pin insertion hole 12b through which a drift pin passing through the column material penetrates as well. The base portion 11 comprises: a base plate 11a with bolt holes 11a2 through which anchor bolts extending from a foundation pass; a first shaft welded erected plate portion 11b2 and a second shaft welded erected plate portion 11b3 welded to the outer surface of the shaft portion 12 with their vertical end faces; and an upper plate portion 11b1 which is provided in parallel with the base plate 11a from the upper ends of the first shaft welded erected plate portion 11b2 and the second shaft welded erected plate portion 11b3, and against which the lower end of the column material abuts.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a column base metal fitting for installing a column on the foundation or base of a building, and to a building using the column base metal fitting. [Background technology]

[0002] As column base hardware for installing columns on the foundation or base of a building, for example, a column insertion member that is provided on a base portion that is installed on the foundation or base of a building and inserted into the column has been proposed, such as a plate-shaped column insertion member (see, for example, Patent Document 1) or a rod-shaped or pipe-shaped column insertion member (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4229329 [Patent Document 2] Japanese Patent Application Publication No. 11-172767 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the column base hardware disclosed in the above-mentioned Patent Document 1 uses a plate-shaped column insertion member as the column insertion member, which requires special processing to pre-cut the insertion portion of the column insertion member in the column material compared to the case of a rod-shaped or pipe-shaped column insertion member, resulting in problems such as increased costs.

[0005] On the other hand, in the column base hardware disclosed in the above-mentioned Patent Document 2, the column insertion member is rod-shaped or pipe-shaped, so it is sufficient to pre-cut a hole by drilling it on the column side, which has the advantage of making pre-cutting easier than in the case of a plate-shaped column insertion member.However, there is a problem in that the joint strength is weaker than in the case of a plate-shaped column insertion member, because the joint area between the base and the column insertion member by welding, etc. is limited to the outer peripheral surface of the column insertion member.

[0006] Therefore, the present invention has been made with an eye on such problems, and aims to provide a column base hardware and a building using the column base hardware, which uses a shaft portion that is a rod-shaped or pipe-shaped column insertion member that is easy to pre-cut on the column material side, while ensuring a large welding length between the shaft portion and the base portion, thereby improving the strength of the entire column base hardware. [Means for solving the problem]

[0007] In order to solve the above problems, the column base hardware of the present invention comprises a base portion, and a shaft portion welded to the base portion, inserted into a shaft insertion portion provided at the lower end of the column material, and provided with a pin insertion hole through which a drift pin passed through the pin insertion hole of the column material passes, and the base portion is characterized in having a lower plate portion provided with a bolt hole through which an anchor bolt extending upward from the foundation passes, a plurality of shaft welding upright plate portions provided to stand on the lower plate portion and welded to the outer surface of the shaft portion in its axial direction, and an upper plate portion provided from the upper ends of the plurality of shaft welding upright plate portions parallel to the lower plate portion and against which the lower end of the column material abuts. In addition, in the column base hardware of the present invention, the base portion comprises a base plate as the lower plate portion, and a shaft support member that is a separate member from the base plate and has the multiple shaft welding vertical plate portions and the upper plate portion, the upper plate portion is provided with a shaft accommodating notch that is cut out to accommodate a portion of the shaft portion, the shaft welding vertical plate portions extend from both sides of the shaft accommodating notch in the upper plate portion toward the base plate, and the vertical end faces of the shaft welding vertical plate portions are welded to the outer surface of the shaft portion, and the lower end face of the shaft welding vertical plate portions is welded to the base plate. In addition, the column base hardware of the present invention is also characterized in that the base plate is a square steel plate, the shaft portion is arranged to stand upright at the center, and the bolt holes are provided on both sides of the shaft portion on a diagonal line passing through the center, and the shaft support member is arranged on the upper surface of the base plate in a position that does not overlap above the bolt holes. In addition, in the column base hardware of the present invention, the upper plate portion has a substantially square shape in plan view, with the shaft accommodating notch provided at one corner, and the first shaft welding upright portion and the second shaft welding upright portion as the plurality of shaft welding upright portions extending from each of the two notch continuous sides that are continuous with the shaft accommodating notch toward the lower plate portion of the four sides of the upper plate portion have vertical end faces welded to the outer surface of the shaft portion and lower end faces welded to the base plate, and a non-welded shaft upright portion is provided that extends from at least one of the two notch opposing sides that face each of the two notch continuous sides toward the base plate, has a vertical end face that is not welded to the outer surface of the shaft portion, and abuts the base plate without being welded to the base plate. Furthermore, in the column base hardware according to the present invention, the base plate is provided with the shaft portion standing upright at its center, and the bolt holes are provided on both sides of the shaft portion on one diagonal line passing through the center of the base plate, and the length on the one diagonal line is formed to have a width greater than the length in the direction of another diagonal line perpendicular to the one diagonal line, the shaft support member is provided on the upper surface side of the base plate in the direction of the other diagonal line so as not to overlap above the bolt hole, and the upper plate portion is substantially square in plan view with the shaft accommodating notch provided at one corner, and the shaft accommodating notch is provided at one of the four sides of the upper plate portion. The first shaft welding vertical plate portion and the second shaft welding vertical plate portion as the plurality of shaft welding vertical plate portions extending from each of two notch continuous sides continuous with the accommodating notch toward the lower plate portion each have a vertical end face welded to the outer surface of the shaft portion and a lower end face welded to the base plate, and are also characterized in that a shaft non-welded vertical plate portion is provided that extends from at least one of the two notch opposing sides facing each of the two notch continuous sides toward the base plate, has a vertical end face that is not welded to the outer surface of the shaft portion, and has a lower end face that protrudes from the base plate. In addition, in the column base hardware of the present invention, the base portion is composed of two shaft support members, each of the two shaft support members having the lower plate portion provided with a shaft accommodating notch cut out to accommodate a portion of the shaft portion, a first shaft welding upright portion and a second shaft welding upright portion that rise from each of two notch continuous sides that are continuous with the shaft accommodating notch of the lower plate portion and have their vertical end faces welded to the outer surface of the shaft portion, an upper plate portion that bends from the upper end of the first shaft welding upright portion and is arranged parallel to the lower plate portion and has a shaft accommodating notch cut out to accommodate a portion of the shaft portion, and a non-welded shaft upright portion that bends from the side of the upper plate portion facing the first shaft welding upright portion and extends downward, and is also characterized in that the column base hardware is constructed by welding the vertical end faces of the first shaft welding upright portion and the second shaft welding upright portion of each of the two sets of shaft support members to the outer surface of the shaft portion. In addition, in the building of the present invention, an anchor bolt extending upward from the foundation is passed through the bolt hole in the lower plate portion of any of the above-mentioned column base hardware and fastened with a nut, thereby fixing the column base hardware to a cross member such as a foundation or base sill, and the lower end of the column is abutted against the upper plate portion of the column base hardware, and the shaft portion of the column base hardware is inserted into the shaft insertion portion provided at the lower end of the column, and the pin insertion hole provided in the column is aligned with the pin insertion hole in the shaft portion and a drift pin is passed through, thereby fixing the column to the cross member such as a foundation or base sill via the column base hardware. [Effects of the Invention]

[0008] The column base hardware of the present invention comprises a shaft portion that is inserted into the column material and fixed with a pin, and a base portion that supports the shaft portion, and the base portion has a lower plate portion with bolt holes for passing anchor bolts through, a plurality of shaft welding vertical plate portions welded to the outer surface of the shaft portion in the axial direction, and an upper plate portion that is arranged from the upper end of the shaft welding vertical plate portion parallel to the lower plate portion and against which the lower end of the column material abuts. Therefore, since the shaft portion is welded in the axial direction of the shaft portion between the multiple shaft welding vertical plate portions that make up the base portion, it is possible to sufficiently ensure the required welding length between the shaft portion and the base portion, thereby improving the strength of the entire column base hardware and ultimately improving the strength of the entire building that uses that column base hardware. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view of a column base metal fitting according to a first embodiment of the present invention. [Figure 2] 1(a) and 1(b) are a front view and a right side view, respectively, of a column base metal fitting according to a first embodiment of the present invention. [Figure 3] 1 is a plan view of a column base metal fitting according to a first embodiment of the present invention. [Figure 4] 1(a) and 1(b) are a plan view and a front view, respectively, of a base plate constituting the column base hardware of the first embodiment according to the present invention. [Figure 5]1(a) and 1(b) are perspective views of a shaft support member constituting the column base hardware of the first embodiment according to the present invention. [Figure 6] 1(a) to 1(d) are a plan view, a left side view, a right side view, and a front view, respectively, of a shaft support member that constitutes a column base hardware according to a first embodiment of the present invention. [Figure 7] FIG. 1 is a perspective view showing an example of a state in which the column base metal fitting of the first embodiment of the present invention is installed on a foundation. [Figure 8] FIG. 1 is a perspective view showing an example of a state in which the column base hardware of the first embodiment of the present invention is installed on a base. [Figure 9] (a) and (b) are figures explaining that the lower part of the pillar is less likely to split when the pillar is installed using conventional box-shaped pillar base hardware and when the pillar is installed using the pillar base hardware of embodiment 1 of the present invention. [Figure 10] (a) and (b) are figures explaining that when pillars are installed using the pillar base hardware of embodiment 1 of the present invention and cross members such as foundations are installed between the pillars, changing the height of the cross members makes it less likely for the lower part of the pillars to crack. [Figure 11] FIG. 10 is a perspective view of a column base metal fitting according to a second embodiment of the present invention. [Figure 12] 10(a) and 10(b) are a front view and a right side view, respectively, of a column base metal fitting according to a second embodiment of the present invention. [Figure 13] FIG. 10 is a plan view of a column base metal fitting according to a second embodiment of the present invention. [Figure 14] 10(a) and 10(b) are perspective views of a base plate constituting a column base hardware according to a second embodiment of the present invention. [Figure 15] 10(a) to 10(c) are a plan view, a right side view, and a front view, respectively, of a base plate constituting a column base hardware according to a second embodiment of the present invention. [Figure 16] 10(a) and 10(b) are perspective views of a shaft support member constituting a column base hardware according to a second embodiment of the present invention. [Figure 17]10(a) to 10(d) are a plan view, a left side view, a right side view, and a front view, respectively, of a shaft support member constituting a column base hardware according to a second embodiment of the present invention. [Figure 18] FIG. 10 is a perspective view of a column base fitting according to a third embodiment of the present invention. [Figure 19] 10(a) and 10(b) are a front view and a right side view, respectively, of a column base metal fitting according to a third embodiment of the present invention. [Figure 20] FIG. 10 is a plan view of a column base metal fitting according to a third embodiment of the present invention. [Figure 21] 10(a) and 10(b) are perspective views of a shaft support member constituting a column base hardware according to a third embodiment of the present invention. [Figure 22] 10(a) to 10(d) are respectively a front view, a left side view, a right side view, and a front view of a shaft support member constituting a column base hardware according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] Below, the column base hardware 1, 1', 1" of embodiments 1 to 3 according to the present invention will be described in detail with reference to the attached drawings. Note that the column base hardware 1, 1', 1" of embodiments 1 to 3 described below are merely examples of the present invention, and the present invention is not limited to the column base hardware 1, 1', 1" of embodiments 1 to 3 below, but can be modified as appropriate within the scope of the technical concept of the present invention.

[0011] Embodiment 1. <Configuration of column base hardware 1 of embodiment 1> A column base hardware 1 according to the first embodiment of the present invention is configured to include a base portion 11 and a shaft portion 12 welded to the base portion 11, as shown in FIGS.

[0012] (Base 11) The base portion 11 is a member that is installed on a cross member such as the foundation 2 or base 3 of a building, as shown in Figures 7 and 8 described below, and is composed of a base plate 11a that is installed on a cross member such as the foundation 2 or base 3, as shown in Figures 1 to 3, and two shaft support members 11b, 11b that are separate from the base plate 11a and welded onto the base plate 11a.

[0013] (Base plate 11a) As shown in Figure 4 etc., the base plate 11a is made of a square steel plate, and at its center is provided a plating hole 11a1 to allow the plating liquid to escape when the inner surface of the shaft portion 12 fixed to the base plate 11a is plated, while two bolt holes 11a2 are provided diagonally across from the center of the base plate 11a to pass anchor bolts 2a extending upward from the foundation 2.

[0014] The inner diameter of the plated hole 11a1 is smaller than the outer diameter of the shaft portion 12 and larger than the inner diameter of the shaft portion 12, for example.

[0015] (shaft support member 11b) As shown in Figures 1 to 3, etc., two sets of shaft support members 11b are installed on a diagonal line different from the diagonal line on which the two bolt holes 11a2 are provided on the square base plate 11a, and are members that are installed on the base plate 11a so as not to block the area above the two bolt holes 11a2, and have an upper plate portion 11b1, a first shaft welding vertical plate portion 11b2, a second shaft welding vertical plate portion 11b3, and a shaft non-welded vertical plate portion 11b4, as shown in Figures 5 and 6, etc.

[0016] The upper plate portion 11b1 is the portion against which the lower end portion 4a (see Figures 7 and 8) of the pillar material 4 abuts to receive the pillar material 4, and is formed in an approximately square shape in plan view excluding the shaft accommodating cutout portion 11b11, which is cut out to accommodate an approximately 90-degree arc portion of the outer peripheral surface of the shaft portion 12, two cutout continuing edges 11b12, 11b13 continuing from the shaft accommodating cutout portion 11b11, and cutout opposing edges 11b14, 11b15 opposing the two cutout continuing edges 11b12, 11b13, respectively.

[0017] 5 and 6, a first shaft welding upright portion 11b2 and a second shaft welding upright portion 11b3 are bent down and welded to the shaft portion 12, respectively, on the two cutout continuous sides 11b12 and 11b13, while a non-welded shaft upright portion 11b4 is bent down and welded from the cutout facing side 11b14, and is not welded to the shaft portion 12. No upright portions such as the first shaft welding upright portion 11b2, the second shaft welding upright portion 11b3, or the non-welded shaft upright portion 11b4 are provided on the cutout facing side 11b15.

[0018] As shown in Figures 5 and 6, the first shaft welding vertical plate portion 11b2 and the second shaft welding vertical plate portion 11b3 are vertical plate portions (side plate portions) that extend vertically downward from notch continuing edges 11b12, 11b13 that are continuous with the shaft accommodating notch 11b11 of the upper plate portion 11b1 toward the base plate 11a, and are each formed in an approximately square shape, with vertical end faces 11b21, 11b31 that abut the outer peripheral surface (outer side surface) of the shaft portion 12 being welded by fillet welding or the like, and lower end faces 11b22, 11b32 being welded to the upper surface of the base plate 11a.

[0019] In the column base hardware 1 of this embodiment, two shaft support members 11b, 11b are used as the base portion 11, and therefore the outer peripheral surface (outer surface) of the shaft portion 12 is welded to the vertical end faces 11b21 of the two first shaft welding vertical plate portions 11b2 and the vertical end faces 11b31 of the two second shaft welding vertical plate portions 11b3, respectively.

[0020] In this embodiment, the upper plate portion 11b1 of the shaft support member 11b is horizontal and parallel to the base plate 11a, so the height of the vertical end face 11b21 of the first shaft welding upright portion 11b2 of the shaft support member 11b is equal to the height of the vertical end face 11b31 of the second shaft welding upright portion 11b3. Therefore, the weld length of the weld W1 between the vertical end face 11b21 of the first shaft welding upright portion 11b2 and the outer peripheral surface of the shaft portion 12 is approximately equal to the weld length of the weld W2 between the vertical end face 11b31 of the second shaft welding upright portion 11b3 and the outer peripheral surface of the shaft portion 12. Note that the welds in the drawings are indicated by grid lines.

[0021] Furthermore, in this embodiment, the two shaft support members 11b, 11b that constitute the base portion 11 are the same, so if the welding length of the welding point W1 between the vertical end face 11b21 of the first shaft welding vertical portion 11b2 and the outer peripheral surface of the shaft portion 12 and the welding length of the welding point W2 between the vertical end face 11b31 of the second shaft welding vertical portion 11b3 and the outer peripheral surface of the shaft portion 12 are LW (see Figure 2(a)), in the column base hardware 1 of this embodiment, the welding length between the shaft portion 12 and the two shaft welding vertical portions 11b, 11b that constitute the base portion 11 is 2 × (LW + LW) = 4 · LW, that is, four times the welding length LW of the welding point W1 between the vertical end face 11b21 of the first shaft welding vertical portion 11b2 and the outer peripheral surface of the shaft portion 12.

[0022] Therefore, when comparing the welding length with when the lower end surface of the shaft portion 12 is welded onto the base plate 11a, more precisely, it is a comparison of four times the welding length LW of the welding point W1 between the vertical end surface 11b21 of the first shaft welding vertical plate portion 11b2 and the outer peripheral surface of the shaft portion 12 with the welding length of the outer peripheral surface (outer surface) of the shaft portion 12. However, in the column base hardware 1 of this embodiment, as shown in Figure 1 etc., four times the welding length LW is clearly longer than the arc length of the outer peripheral surface (outer surface) of the shaft portion 12, so a longer welding length can be ensured between the shaft portion 12 and the base portion 11 than when the lower end surface of the shaft portion 12 is welded onto the base plate 11a.

[0023] As a result, in the column base hardware 1 of this embodiment, by ensuring a large weld length between the shaft portion 12 and the base portion 11, it is possible to improve the strength of the entire column base hardware 1, particularly the tensile strength, and the strength of the entire building in which the column material 2 is installed using this column base hardware 1 can be improved.

[0024] Furthermore, in the column base hardware 1 of this embodiment, the welding point W3 between the lower end surface 11b22 of the first shaft welding vertical plate portion 11b2 and the upper surface of the base plate 11a, and the welding point W4 between the lower end surface 11b32 of the second shaft welding vertical plate portion 11b3 and the upper surface of the base plate 11a are respectively connected in an L-shape to the welding point W1 between the vertical end surface 11b21 of the first shaft welding vertical plate portion 11b2 and the outer peripheral surface of the shaft portion 12, and the welding point W2 between the vertical end surface 11b31 of the second shaft welding vertical plate portion 11b3 and the outer peripheral surface of the shaft portion 12.Therefore, if the welding length between the shaft portion 12 and the base portion 11 is also added to the welding length of the welding points W3 and W4, the welding length becomes even longer, and in this respect too, the strength of the column base hardware 1 as a whole can be ensured.

[0025] Furthermore, because the size of base plate 11a is limited by the width of foundation 2, sill 3, etc., the weld length of weld W3 between lower end surface 11b22 of first shaft welding vertical portion 11b2 and the upper surface of base plate 11a and the weld length of weld W4 between lower end surface 11b32 of second shaft welding vertical portion 11b3 and the upper surface of base plate 11a are also limited by the width of foundation 2, sill 3, etc. However, weld length LW of weld W1 between vertical end surface 11b21 of first shaft welding vertical portion 11b2 and the outer circumferential surface of shaft portion 12 and weld W2 between vertical end surface 11b31 of second shaft welding vertical portion 11b3 and the outer circumferential surface of shaft portion 12, which are perpendicular to base plate 11a, can be easily changed by adjusting the height of first shaft welding vertical portion 11b2 and second shaft welding vertical portion 11b3 of shaft support member 11b, so that the desired strength of the entire column base hardware 1 can be easily ensured.

[0026] Unlike the first shaft welding vertical portion 11b2 and the second shaft welding vertical portion 11b3, the shaft non-welded vertical portion 11b4 is not continuous with the shaft accommodating notch 11b11 of the upper plate portion 11b1 but is separated therefrom, and is therefore a side plate portion that is not welded to the outer peripheral surface (outer side surface) of the shaft portion 12, and its height and width are approximately the same as those of the first shaft welding vertical portion 11b2 and the second shaft welding vertical portion 11b3.

[0027] In addition, the non-welded shaft vertical portion 11b4, like the first shaft welding vertical portion 11b2 and the second shaft welding vertical portion 11b3, has its lower end surface abutting the upper surface of the base plate 11a, but unlike the first shaft welding vertical portion 11b2 and the second shaft welding vertical portion 11b3, it is not welded to the upper surface of the base plate 11a.

[0028] (shaft part 12) The shaft portion 12 is a member formed from a steel pipe or the like of a predetermined length having a hollow portion 12a, and is welded to the two shaft support members 11b, 11b that constitute the base portion 11 as described above, and is inserted into the shaft insertion portion 4c (see Figures 9 and 10) provided at the lower end portion 4a of the pillar material 4 as shown in Figures 7 and 8 described below, and then fixed to the pillar material 4 by a drift pin 5.

[0029] The lower end of the shaft portion 12 is placed on the upper surface of the base portion 11a so that the center of the hollow portion 12a of the shaft portion 12 coincides with the center of the plated hole 11a1 of the base portion 11a, and is fixed by welding to the vertical end faces 11b21 and 11b31 of the first shaft welding upright portion 11b2 and the second shaft welding upright portion 11b3 of the two shaft support members 11b, 11b. Note that the lower end face of the shaft portion 12 is not welded to the upper surface of the base portion 11, but it may of course be welded.

[0030] Furthermore, the shaft portion 12 is provided with three pin insertion holes 12b, through which the drift pins 5 pass, at predetermined intervals at a position higher than the height of the shaft support member 11b, intersecting at 90-degree intervals. The number of pin insertion holes 12b may vary depending on the length of the shaft portion 12, and is not limited to three, and may of course be provided in two or four or more locations.

[0031] <Regarding the usage and functions of the column base hardware 1 of the first embodiment> Next, a method of using the column base hardware 1 of the first embodiment according to the present invention configured as described above, its functions, etc. will be described.

[0032] (When installing the column 4 on the foundation 2 via the column base hardware 1 of embodiment 1) First, the column base hardware 1 of embodiment 1 is installed on the foundation 2, and the two anchor bolts 2a extending upward from the foundation 2 are each passed through two bolt holes 11a2 in the base plate 11a (see Figures 1 and 3, etc.), and then the nuts 2b are tightened from the upper ends of the anchor bolts 2a to fix the column base hardware 1 of embodiment 1 onto the foundation 2.

[0033] Here, when the upper end of the anchor bolt 2a is tightened with a nut 2b to fix this column base hardware 1 onto the foundation 2, in the column base hardware 1 of embodiment 1, no shaft support member 11b or the like is provided above the two bolt holes 11a2 in the base plate 11a, as shown in Figures 1 and 3, etc., so there is no obstacle (the "support plate 3" in Patent Document 1, and the "column base support plate 43" in Patent Document 2) that would obstruct tightening the nut 2b onto the anchor bolt 2a using a tool (not shown).

[0034] This makes it possible to tighten the nuts 2b without having to worry about the height of manual or electric tools, thereby improving the workability of the work of fixing the column base hardware 1 to the foundation 2. Furthermore, even after the column material 4 has been fixed to the foundation 2 or base 3 via this column base hardware 1, it becomes easy to retighten the nuts 2b fastened to the anchor bolts 2a, which also improves the workability of the work of fixing the column base hardware 1.

[0035] After the column base hardware 1 is fixed onto the foundation 2 by tightening the nut 2b onto the anchor bolt 2a, the column material 4 lifted by a crane (not shown) or the like is lowered onto the column base hardware 1 of this embodiment 1 fixed to the foundation 2, and the shaft portion 12 is inserted into the shaft insertion portion 4c of the column material 4 (see Figures 9 and 10) to align the three pin holes 4b of the column material 4 with the three pin insertion holes 12b of the shaft portion 12 (see Figures 1 and 2, etc.), and then the drift pin 5 is inserted into the three pin holes 4b of the column material 4 and the three pin insertion holes 12b of the shaft portion 12.

[0036] As a result, the column material 4 can be fixed onto the foundation 2 via the column base hardware 1 of this embodiment 1, as shown in FIG.

[0037] Furthermore, in the above explanation, it has been explained that the column base hardware 1 of this embodiment 1 is first fixed onto the foundation 2, and then the column material 4 is lowered and installed on top of the column base hardware 1 fixed to the foundation 2. However, the present invention is not limited to this, and it is also possible to first fix the column base hardware 1 of this embodiment 1 to the lower end 4a of the column material 4, then lower the column material 4 with the column base hardware 1 installed onto the foundation 2, and then fix the column material 4 to the foundation 2 via the column base hardware 1.

[0038] (Explanation that the lower part of the column is less likely to split compared to conventional box-shaped column base hardware) Figures 9(a) and (b) are diagrams explaining that the lower part of the column material 4 is less likely to split when the column material 4 is installed using a conventional box-shaped column base hardware 6 and when the column material 4 is installed using the column base hardware 1 of embodiment 1 of the present invention.

[0039] When a pillar 4 is installed using a conventional box-shaped pillar base hardware 6 as shown in Figure 9(a), if the pillar 4 is subjected to a tensile force, unless the tensile force acts perpendicularly to the upper plate portion 61 of the conventional pillar base hardware 6, a rotational force as shown by the arrow is generated at the joint between the upper plate portion 61 and the shaft portion 62, and this rotational force is transmitted to the lower end portion (butt end surface) 4a of the pillar 4, making the lower end portion (butt end surface) 4a of the pillar 4 more likely to split.

[0040] In contrast, when the pillar material 4 is installed using the pillar base hardware 1 of embodiment 1 of the present invention as shown in Figure 9(b), when the pillar material 4 is subjected to a tensile force, the shaft portion 12 extends to the base plate 11a, so the center point of the rotational force stress is lowered to the base plate 11a, and local stress concentration acting on the lower end (end grain surface) 4a of the pillar material 4 is suppressed, thereby preventing the lower end (end grain surface) 4a of the pillar material 4 from cracking.

[0041] In particular, in the column base hardware 1 of the first embodiment according to the present invention, the shaft portion 12 is not directly welded to the upper plate portion 11b1 of the shaft support member 11b, against which the lower end portion (buttock surface) 4a of the column material 4 abuts, and to the base plate 11a, so that the center of rotation tends to drop when the column material 4 is subjected to a tensile force. Also, because the shaft portion 12 extends to the base plate 11a, a sufficient welding length can be ensured, and the plate thickness of the shaft support member 11b can also be made thinner; making the plate thickness thinner weakens the shaft support member 11b relatively, so that the center of rotation tends to drop when the column material 4 is subjected to a tensile force, and it becomes possible to prevent the lower end portion (buttock surface) 4a of the column material 4 from splitting.

[0042] (When a cross member is installed between columns installed using the column base hardware 1 of embodiment 1 according to the present invention, the lower part of the column is less likely to split)

[0043] Figure 10(a) shows a state in which pillars 4, 4 are installed using the pillar base hardware 1 of embodiment 1 of the present invention, and the lower surface 3a of the base 3, which is a cross member, is raised above the upper surface 2c of the foundation 2 between the pillars 4, 4 and installed at the same height as the lower end 4a of the pillar 4.

[0044] In this case, since the base 3 is joined only to the column material 4, if a lateral force acts on the base 3 in the direction of the arrow in Figure 10(a), the force will be received by the shaft portion 12 of this column base hardware 1, making it easy for the column material 4 to split.

[0045] In contrast, Figure 10(b) shows the state in which the base 3 is installed between column materials 4, 4 installed using the column base hardware 1 of embodiment 1 of the present invention, with the lower surface 3a of the base 3 in contact with the upper surface 2c of the foundation 2.

[0046] In this case, the base 3 can be joined to the lateral side of the column material 4, the non-welded vertical shaft portion 11b4 of the shaft support member 11b of the column base hardware 1, the lateral end face of the base plate 11a, etc., so when a lateral force acts on the base 3 in the direction of the arrow in Figure 10(b), the column base hardware 1 can withstand the force at the shaft portion 12 and base portion 11, thereby preventing the column material 4 from cracking.

[0047] <Summary of the column base hardware 1 according to the first embodiment of the present invention> As described above, the column base hardware 1 of the first embodiment according to the present invention includes the base portion 11 and the shaft portion 12 provided on the upper surface side of the base portion 11, which is inserted into the shaft insertion portion 4c provided at the lower end portion 4a of the column material 4 and has a pin insertion hole 12b through which the drift pin 5 passing through the pin hole 4b of the column material 4 passes. The base portion 11 is provided with a base bolt hole 11a2 through which the anchor bolt 2a extending from the foundation 2 passes. The shaft portion 12 has a base plate 11a, a first shaft welding vertical plate portion 11b2 and a second shaft welding vertical plate portion 11b3 whose vertical end faces 11b21, 11b31 are welded to the outer peripheral surface (outer surface) of the shaft portion 12 in the axial direction (longitudinal direction) of the shaft portion 12, and an upper plate portion 11b1 which is arranged parallel to the base plate 11a from the upper ends of the first shaft welding vertical plate portion 11b2 and the second shaft welding vertical plate portion 11b3 and against which the lower end portion 4a of the pillar material 4 abuts.

[0048] Therefore, since the shaft portion 12 is welded to the vertical end faces 11b21, 11b31 of the first shaft welding vertical portion 11b2 and the second shaft welding vertical portion 11b3 of each of the two shaft support portions 11b which are welded and fixed to the base plate 11a, it is possible to ensure sufficient welding length between the shaft portion 12 and the base plate 11a and the two shaft support portions 11b which constitute the base portion 11, thereby improving the strength of the entire column base hardware 1 between the shaft portion 12 and the base portion 11.

[0049] In particular, in the column base hardware 1 of this embodiment 1, taking into consideration the workability into the column material 4, a pipe-shaped shaft portion 12 is used as the column material insertion portion to be inserted into the column material 4 rather than a plate-shaped shaft portion 12. However, if the lower end of the shaft portion 12 is simply welded to the base plate 11a, the weld length between the shaft portion 12 and the base plate 11a will be approximately the circumference of the lower end of the shaft portion 12, and if the outer diameter of the shaft portion 12 is small, the weld length cannot be sufficiently secured, which may result in insufficient strength of the entire column base hardware 1, particularly tensile strength.

[0050] However, in the column base hardware 1 of this embodiment 1, instead of welding the lower end of the shaft portion 12 to the base plate 11a of the pedestal portion 11, the vertical end faces 11b21, 11b31 of the first shaft welding vertical plate portion 11b2 and the second shaft welding vertical plate portion 11b3 of each of the two shaft support members 11b, 11b fixed on the base plate 11a of the pedestal portion 11 are welded in the longitudinal direction of the shaft portion 12.

[0051] Therefore, in the column base hardware 1 of this embodiment 1, the heights of the vertical end faces 11b21, 11b31 of the first shaft welding vertical plate portion 11b2 and the second shaft welding vertical plate portion 11b3 are the same, so the welding lengths LW are also approximately equal, and the welding length between the shaft portion 12 and the two shaft support members 11b, 11b can be secured as 2·(LW+LW)=4·LW.

[0052] As a result, with the column base hardware 1 of this embodiment 1, it is possible to ensure a longer weld length than when simply welding the lower end surface of the shaft portion 12 to the upper surface of the base plate 11a, and by adjusting the lengths of the vertical end surfaces 11b21, 11b31 of the first shaft welding vertical plate portion 11b2 and the second shaft welding vertical plate portion 11b3 of the shaft support member 11b, it is possible to easily change the weld length, and the strength of the entire column base hardware 1 can be easily adjusted.

[0053] Furthermore, in the column base hardware 1 of this embodiment 1, the load and compressive force of the building transmitted through the column material 4 are borne not only by the contact portion between the lower end surface of the shaft portion 12 and the base plate 11a, but also by each of the six vertical plate portions, namely the first shaft welded vertical plate portion 11b2, the second shaft welded vertical plate portion 11b3, and the shaft non-welded vertical plate portion 11b4, which are bent from the upper plate portion 11b1 of each of the two shaft support members 11b, 11b.Therefore, the load and compressive force transmitted through the column material 4 can be efficiently borne not only by the shaft portion 12 and the base plate 11a, but also by the shaft support member 11b, thereby improving the strength of the entire column base hardware 1 and also improving the strength of the entire building.

[0054] Furthermore, in the column base hardware 1 of this embodiment 1, the height of the shaft support member 11b of the base portion 11 not only ensures the weld length with the shaft portion 12, but also ensures storage space for the nuts 2b of the anchor bolts 2a and the mounting height of the column material 4. The steel plate can be cut to a predetermined shape and then bent to form it, allowing for efficient design and manufacture of a column base hardware 1 with the desired design strength. Also, the first shaft welding vertical plate portion 11b2 and the second shaft welding vertical plate portion 11b3 are located around the bolt holes 11a2 in the base plate 11a, and these also function as bending stiffeners for the base plate 11a, allowing for efficient design and manufacture of a column base hardware 1 with the desired design strength.

[0055] Furthermore, in the column base hardware 1 of the first embodiment according to the present invention, the upper plate portion 11b1 of the base portion 11 is provided with a shaft accommodating notch portion 11b11 that is cut out so that a part of the shaft portion 12 can be accommodated therein.

[0056] As a result, the shaft accommodating cutout 11b11 allows the vertical end faces 11b21, 11b31 of the first shaft welding vertical plate portion 11b2 and the second shaft welding vertical plate portion 11b3 to be spaced apart at an appropriate distance, and the spacing between the welding points between the vertical end faces 11b21, 11b31 of the first shaft welding vertical plate portion 11b2 and the second shaft welding vertical plate portion 11b3 and the outer peripheral surface (outer surface) of the shaft portion 12 is also wider than when the shaft accommodating cutout 11b11 is not provided, making it possible to weld the vertical end faces 11b21, 11b31 of the first shaft welding vertical plate portion 11b2 and the second shaft welding vertical plate portion 11b3 to the outer peripheral surface (outer surface) of the shaft portion 12 evenly and in a balanced manner at approximately 90-degree intervals, thereby improving the strength of the entire column base hardware 1.

[0057] Furthermore, in the column base hardware 1 of embodiment 1 according to the present invention, the base plate 11a is a rectangular steel plate, with the shaft portion 12 standing upright at its center, and bolt holes 11a2 are provided on both sides of the shaft portion 12 on a diagonal line passing through the center, and the shaft support member 11b has an upper plate portion 11b1, a first shaft welding vertical plate portion 11b2, and a second shaft welding vertical plate portion 11b3 on the upper surface side of the base plate 11a, avoiding the area above the bolt holes 11a2.

[0058] Therefore, when fixing the column base hardware 1 to a cross member such as a foundation 2 or base 3 by passing an anchor bolt 2a through the bolt hole 11a2 and tightening it with a nut 2b, since there is no upper plate portion above the bolt hole 11a2, it is easy to rotate the nut 2b using a tool, thereby improving the workability of fixing the column base hardware 1.

[0059] Furthermore, even after the column material 4 is fixed to the foundation 2 or base 3, etc. via the column base hardware 1 of embodiment 1, there are no obstacles such as an upper plate portion above the bolt hole 11a2, so the nut 2b fastened to the anchor bolt 2a can be easily tightened, which also improves the workability of the column base hardware 1 fixing work.

[0060] Furthermore, in the column base hardware 1 of embodiment 1 according to the present invention, the two shaft support members 11b, 11b constituting the base portion 11 have a shaft accommodating notch 11b11 in their upper plate portion 11b1, and not only are a first shaft welding vertical plate portion 11b2 and a second shaft welding vertical plate portion 11b3 welded to the outer peripheral surface (outer side) of the shaft portion 12 at their vertical end faces 11b21, 11b31 from two sides of the notch continuing edge 11b12, 11b13 continuing from the shaft accommodating notch 11b11, but also a shaft non-welded vertical plate portion 11b4 is provided from the notch opposing edge 11b14 opposite the notch continuing edge 11b12 to the first shaft welding vertical plate portion 11b2, whose vertical end face is not welded to the shaft portion 12 and whose lower end face is not welded to the base plate 11a but abuts against the base plate 11a.

[0061] Therefore, in the column base hardware 1 of embodiment 1, although the non-welded vertical shaft portion 11b4 does not contribute to the weld length, its lower end surface abuts the upper surface of the base plate 11a, so that the load and compressive force, etc. via the column material 4 can be transmitted to the base plate 11a not only through the first shaft welded vertical shaft portion 11b2 and the second shaft welded vertical shaft portion 11b3 but also through the non-welded vertical shaft portion 11b4, thereby suppressing deformation of the shaft support member 11b and the base plate 11a, improving the strength of the entire column base hardware 1, and making it possible to reduce the plate thickness of the base portion 11 and the shaft portion 12.

[0062] Furthermore, in the column base hardware 1 of embodiment 1 according to the present invention, of the four sides of the upper plate portion 11b1 of each of the two shaft support members 11b, 11b, a shaft non-welded upright portion 11b4 is provided on the notch opposing side 11b14 that faces the notch continuing side 11b12 that continues to the shaft accommodating notch 11b11 in the upper plate portion 11b1, while no upright portion (side plate portion) is provided on the notch opposing side 11b15 that faces the notch continuing side 11b13.

[0063] Therefore, the amount and weight of steel used can be reduced compared to when upright plates (side plates) are provided on all four sides of the upper plate portion 11b1 of each of the two shaft support members 11b, 11b of the column base hardware 1 of Embodiment 1, thereby reducing costs and weight. Also, when adding welding points, since no upright plates (side plates) are provided on the cutout-opposing side 11b15, welding can also be performed on the inside of the shaft support members 11b, 11b, which also improves the strength of the column base hardware 1 as a whole.

[0064] Incidentally, in the column base hardware 1 of embodiment 1 according to the present invention, the column base hardware 1 has been described as being installed on a foundation 2 as shown in Figure 7, but the present invention is not limited to this and, for example, it may of course be installed on a cross member such as a sill 3 as shown in Figure 8. Also, in the column base hardware 1 of embodiment 1 according to the present invention, the column base hardware 1 has been described as employing a pipe-shaped shaft portion 12 having a hollow portion 12a as shown in Figure 1, but the present invention is not limited to this and, for example, it may of course employ a solid shaft portion 12 without a hollow portion 12a. The above also applies to the column base hardware 1' and 1" of embodiments 2 and 3 described below.

[0065] Furthermore, in the column base hardware 1 of embodiment 1 according to the present invention, the first shaft welding vertical portion 11b2, the second shaft welding vertical portion 11b3, and the shaft non-welding vertical portion 11b4 are provided on the notch continuing edges 11b12, 11b13 and the notch opposing edge 11b14 of the upper plate portion 11b1 of the shaft support member 11b constituting the base portion 11, respectively, and no shaft non-welding vertical portion is provided on the notch opposing edge 11b15. However, the present invention is not limited to this, and it is of course also possible to provide a shaft non-welding vertical portion on the notch opposing edge 11b15.

[0066] Furthermore, in this embodiment, the lower end surface of the non-welded vertical shaft portion 11b4 is not welded to the base plate 11a, but the present invention is not limited to this, and it is of course also possible to weld the lower end surface of the non-welded vertical shaft portion 11b4 to the base plate 11a.

[0067] Embodiment 2. Next, a column base hardware 1' according to a second embodiment of the present invention will be described. In the column base hardware 1 of the first embodiment, the base plate 11a constituting the pedestal portion 11 is made of a steel plate that is square in plan view. However, in the column base hardware 1' of the second embodiment, the base plate 11a' is not square in plan view, but is a hexagon with the longer sides aligned diagonally in the direction of the two bolt holes, and is configured so that the lower ends of the non-welded upright shaft portions 11b4' of the two shaft support members 11b', 11b' do not abut on the base plate 11a'. Note that the configuration of the shaft portion 12 is the same as in the first embodiment, so a description of the shaft portion 12 will be omitted and the configuration of the pedestal portion 11' will be mainly described.

[0068] Figure 11 is an oblique view of a column base hardware 1' of embodiment 2 according to the present invention, Figures 12(a) and (b) are a front view and a right side view, respectively, of a column base hardware 1' of embodiment 2 according to the present invention, and Figure 13 is a plan view of a column base hardware 1' of embodiment 2 according to the present invention.

[0069] (Base part 11') The base portion 11' comprises a base plate 11a' which is installed on a cross member such as a building foundation 2 (see Figure 7) or base 3 (see Figure 8), and two shaft support members 11b', 11b'. Each of the two shaft support members 11b', 11b' is composed of an upper plate portion 11b1', a first shaft welding vertical plate portion 11b2', a second shaft welding vertical plate portion 11b3', and a shaft non-welded vertical plate portion 11b4'.

[0070] Unlike the base plate 11a of the first embodiment, the base plate 11a' of the second embodiment is not square in plan view, but is formed as an elongated, approximately hexagonal shape extending in the direction connecting the two bolt holes 11a2', 11a2' as shown in Figures 14 and 15, and has a plated through hole 11a1' at its center, just like the base plate 11a of the first embodiment, and is provided with cut-and-raised pieces 11a3', 11a3' at the corners near each of the two bolt holes 11a2', 11a2' on either side of the plated through hole 11a1', by bending both sides of the corners by 90 degrees and cutting and raising the corners.

[0071] The two shaft support members 11b' of embodiment 2 are configured in a manner substantially similar to the shaft support member 11b of embodiment 1, as shown in Figures 16(a), (b) and 17(a) to (d), and each includes an upper plate portion 11b1', a first shaft welding vertical portion 11b2', a second shaft welding vertical portion 11b3', and a shaft non-welded vertical portion 11b4'.

[0072] However, in the column base hardware 1' of embodiment 2, the base plate 11a' is not square, but is formed as an elongated, approximately hexagonal shape extending in the direction connecting the two bolt holes 11a2', 11a2', as shown in Figures 14 and 15, and the lower end 11b42' of the non-welded vertical shaft portion 11b4' is configured to rest directly on a cross member such as the foundation 2 or base 3, rather than on the base plate 11a', as shown in Figures 11 and 12(a).

[0073] Therefore, in the column base hardware 1' of embodiment 2, as shown in Figures 17(b) to (d), the non-welded vertical shaft portion 11b4' is configured to be longer than the first shaft welded vertical portion 11b2' and the second shaft welded vertical portion 11b3' by the thickness of the steel plate of the base plate 11a'.

[0074] Here, the welding points in the column base hardware 1' of embodiment 2 are the same as those in the column base hardware 1 of embodiment 1, with the vertical end faces 11b21', 11b31' of the first shaft welding vertical plate portion 11b2' and the second shaft welding vertical plate portion 11b3' of each of the two shaft support members 11b', 11b' being welded to the outer circumferential surface of the shaft portion 12, resulting in welding points W1', W2', respectively, as shown in Figures 12(a) and 12(b). Also, the lower end faces 11b22', 11b32' of the first shaft welding vertical plate portion 11b2' and the second shaft welding vertical plate portion 11b3' of each of the two shaft support members 11b', 11b' being welded to the upper surface of the base plate 11a', resulting in welding points W3', W4', respectively, as shown in Figure 13.

[0075] Therefore, the welding length between the shaft portion 12 and the two shaft support members 11b', 11b' in the column base hardware 1' of embodiment 2 is 2·(LW'+LW')=4·LW', where LW' is the welding length at welding points W1', W2' as shown in Figure 12(a).

[0076] <Summary of the column base hardware 1' of the second embodiment> As described above, in the column base hardware 1' of embodiment 2 of the present invention, the welding between the shaft portion 12 and the two shaft support members 11b', 11b' is performed at the vertical end faces 11b21', 11b31' of the first shaft welding vertical plate portions 11b2', 11b3' of each of the two shaft support members 11b', 11b', as in the column base hardware 1 of embodiment 1. This makes it possible to ensure a sufficient welding length between the shaft portion 12 and the base portion 11', thereby achieving the same effects as the column base hardware 1 of embodiment 1, such as improving the strength of the entire column base hardware 1'.

[0077] In particular, in the column base hardware 1' of embodiment 2, unlike the column base hardware 1 of embodiment 1, the base plate 11a' is not square in plan view, but is hexagonal with its longer sides in the direction of the two bolt holes 11a2', 11a2', and the lower end portions 11b42' of the non-welded vertical shaft portions 11b4' of each of the two shaft support members 11b', 11b' are configured to rest directly on cross members such as the foundation 2 or base 3, rather than on the base plate 11a'.

[0078] Therefore, according to the column base hardware 1' of embodiment 2, the base plate 11a' is made smaller, thereby enabling weight reduction, and although the weight is reduced, the provision of the cut-and-raised pieces 11a3', 11a3' prevents deterioration of strength, and the column material 4 can be reliably supported.

[0079] In the column base hardware 1' of embodiment 2 according to the present invention, the first shaft welded vertical plate portion 11b2', the second shaft welded vertical plate portion 11b3', and the shaft non-welded vertical plate portion 11b4' are respectively provided on the notch continuing edges 11b12', 11b13' and the notch opposing edge 11b14' of the upper plate portion 11b1' of the shaft support member 11b' constituting the base portion 11', and no shaft non-welded vertical plate portion is provided on the notch opposing edge 11b15', but the present invention is not limited to this, and it is of course also possible to provide a shaft non-welded vertical plate portion on the notch opposing edge 11b15'.

[0080] Embodiment 3. Next, we will explain the column base hardware 1" of embodiment 3 according to the present invention. In the column base hardware 1, 1' of the above-mentioned embodiments 1 and 2, we have explained that the base portion 11, 11' is constructed by welding the base plate 11a, 11a' and the shaft support member 11b, 11b', which are separate members, together. However, in the column base hardware 1" of embodiment 3, as shown in Figures 18 to 22, no base plate is used and the base portion 11" is constructed by two shaft support members 11b", 11b" which are formed integrally with the lower plate portion, shaft welding standing plate portion, and upper plate portion according to the present invention, and the two shaft support members 11b", 11b" which constitute the base portion 11" are welded to the shaft portion 12. It should be noted that the shaft portion 12 is the same as the shaft portion 12 of the column base hardware 1, 1' of embodiments 1 and 2, so a description thereof will be omitted.

[0081] Figure 18 is an oblique view of a column base hardware 1" of embodiment 3 of the present invention, Figures 19(a) and (b) are a front view and a right side view, respectively, of a column base hardware 1" of embodiment 3 of the present invention, and Figure 20 is a plan view of a column base hardware 1" of embodiment 3 of the present invention.

[0082] The column base hardware 1" of embodiment 3 is constructed by welding a base portion 11" consisting of two shaft support members 11b", 11b" to a shaft portion 12, as shown in Figures 18 and 19, and the lower plate portion of the present invention is formed integrally with each shaft support member 11b", omitting the base plate.

[0083] That is, as shown in FIGS. 21 and 22, the shaft support members 11b', 11b' of the third embodiment are provided with bolt holes 11b14' and function as the base plates 11a, 11a' of the column base hardware 1, 1' of the first and second embodiments, and are also provided with a lower plate portion 11b1' having a shaft accommodating notch 11b11' cut out to accommodate a part of the shaft portion 12, and cutout portion continuous sides 11b12', 11b13' that rise from the shaft accommodating notch 11b11' of the lower plate portion 11b1' and are connected to the outer peripheral surface (outer side) of the shaft portion 12, respectively. 2 in the axial direction (longitudinal direction), an upper plate portion 11b4'' that is bent from the upper end of the first shaft welding upright portion 11b2'' and is arranged parallel to the lower plate portion 11b1'', and is provided with a shaft accommodating notch 11b41'' that is cut out to accommodate a part of the shaft portion 12, and a shaft non-welded upright portion 11b5'' that is bent from a notch opposing side 11b44'' of the upper plate portion 11b4'' that faces the first shaft welding upright portion 11b2'' and extends downward.

[0084] The welding points in the column base fitting 1" of embodiment 3 are the same as those in the column base fittings 1 and 1' of embodiments 1 and 2, with the vertical end faces 11b21", 11b31" of the first shaft welding vertical plate portion 11b2" and the second shaft welding vertical plate portion 11b3" of each of the two shaft support members 11b", 11b" being welded to the outer surface of the shaft portion 12, resulting in welding points W1", W2", respectively, as shown in Figure 18 and Figures 19(a) and (b).

[0085] Therefore, the welding length between the shaft portion 12 and the two shaft support members 11b", 11b" in the column base hardware 1" of embodiment 3 is 2·(LW"+LW")=4·LW", where LW" is the welding length of each of the welding points W1", W2" as shown in Figure 19(a).

[0086] When the column base hardware 1" of this embodiment 3 is installed on a cross member such as a foundation 2 or a sill 3, unlike the column base hardware 1, 1' of the above-mentioned embodiments 1 and 2, the lower plate portions 11b1", 11b1" of the two shaft support members 11b", 11b" are installed on a cross member such as a foundation 2 or a sill 3, and the anchor bolt 2a extending from the foundation 2 is passed through the bolt holes 11b14", 11b14" of the lower plate portions 11b1", 11b1" and fastened with a nut 2b.

[0087] <Summary of column base hardware 1″ of embodiment 3> Therefore, according to the column base hardware 1" of embodiment 3 of the present invention, as with the column base hardware 1, 1' of embodiments 1 and 2, the vertical end faces 11b21", 11b31" of the first shaft welding vertical plate portions 11b2", 11b3" of the two shaft support members 11b", 11b" respectively are welded, making it possible to ensure a sufficient welding length between the shaft portion 12 and the two shaft support members 11b", 11b" that constitute the base portion 11", thereby improving the strength of the entire column base hardware 1 and achieving the same effects as the column base hardware 1, 1' of embodiments 1 and 2.

[0088] In particular, in the column base hardware 1" of embodiment 3 according to the present invention, unlike the column base hardware 1, 1' of embodiments 1 and 2, the lower plate portions 11b1", 11b1" of the two shaft support members 11b", 11b" respectively function as the base plates 11a, 11a' of the column base hardware 1, 1' of embodiments 1 and 2, i.e., as the lower plate portions of the present invention. Therefore, in the column base hardware 1" of embodiment 3 according to the present invention, a base plate is not required, and welding between the base plate and the two shaft support members 11b", 11b" is not required, which makes manufacturing easier in that there are fewer welding points and reduces costs.

[0089] In the column base hardware 1" of embodiment 3 according to the present invention, the first shaft welded upright portion 11b2", the second shaft welded upright portion 11b3" and the shaft non-welded upright portion 11b5" are respectively provided on the notch continuing edges 11b12", 11b13" of the lower plate portion 11b1" of the shaft support member 11b" constituting the base portion 11", and on the notch opposing edge 11b44" of the upper plate portion 11b4", and no shaft non-welded upright portion is provided on the notch opposing edge 11b45", but the present invention is not limited to this, and it is of course also possible to provide a shaft non-welded upright portion on the notch opposing edge 11b45". [Explanation of symbols]

[0090] 1,1',1" column base hardware 11,11',11" base 11a, 11a' Base plate (lower plate) 11b1” Lower plate part 11a1,11a1' Plated holes 11a2, 11a2', 11b14" bolt holes 11b, 11b', 11b" Shaft support member 11b1, 11b1', 11b4" Upper plate 11b11, 11b11', 11b11" Shaft accommodation notch 11b12, 11b13, 11b12', 11b13', 11b12", 11b13" Continuous edge of notch 11b14, 11b15, 11b14', 11b15', 11b44", 11b45" Opposite sides of notch 11b2, 11b2', 11b2" First shaft welded vertical plate 11b21, 11b21', 11b21" vertical end face 11b22,11b22' Lower end surface 11b3, 11b3', 11b3" Second shaft welded vertical plate 11b31, 11b31', 11b31" Vertical end face 11b22,11b22' Lower end surface 11b4, 11b4', 11b5" Shaft non-welded vertical plate section 12 Shaft section 12a Hollow part 12b Pin insertion hole 2 Basics 2a Anchor bolt 2b Nut 2c Top side 3. Foundation 4 Pillar material 4a Bottom end 4b Pinhole 4c Shaft insertion part 5 Drift Pin

Claims

1. a base portion; and a shaft portion welded to the base portion, inserted into a shaft insertion portion provided at a lower end of a pillar material, and having a pin insertion hole through which a drift pin inserted from a pin insertion hole of the pillar material passes, The base portion is a lower plate portion provided with a bolt hole through which an anchor bolt extending upward from the foundation is passed; a plurality of shaft welding upright plate portions provided to stand on the lower plate portion and welded to an outer surface of the shaft portion in the axial direction; A column base hardware characterized by having an upper plate portion that is arranged parallel to the lower plate portion from the upper end of the multiple shaft welding vertical plate portions and against which the lower end of the column material abuts.

2. The column base hardware according to claim 1, The base portion is a base plate as the lower plate portion; a shaft support member that is a separate member from the base plate and has the plurality of shaft welding upright plate portions and the upper plate portion; The upper plate portion is provided with a shaft accommodating notch that is cut out so as to accommodate a part of the shaft portion, A column base hardware characterized in that the shaft welding vertical plate portion extends from both sides of the shaft accommodating notch in the upper plate portion toward the base plate, the vertical end surface of the shaft welding vertical plate portion is welded to the outer surface of the shaft portion, and the lower end surface of the shaft welding vertical plate portion is welded to the base plate.

3. The column base hardware according to claim 2, The base plate is a rectangular steel plate, the shaft portion is provided so as to stand upright at the center thereof, and the bolt holes are provided on both sides of the shaft portion on a diagonal line passing through the center thereof, A column base hardware characterized in that the shaft support member is provided on the upper surface of the base plate in a position that does not overlap above the bolt hole.

4. The column base hardware according to claim 3, The upper plate portion has a substantially square shape in a plan view, with the shaft accommodating notch provided at one corner, a first shaft welding vertical plate portion and a second shaft welding vertical plate portion as the plurality of shaft welding vertical plate portions extending from two cutout portion continuous sides that are continuous with the shaft accommodating cutout portion among the four sides of the upper plate portion toward the lower plate portion, each having a vertical end surface welded to an outer surface of the shaft portion and a lower end surface welded to the base plate, A column base hardware characterized in that a non-welded vertical shaft plate portion is provided that extends from at least one of the two notch opposing sides that face each of the two notch continuous sides toward the base plate, and whose vertical end face is not welded to the outer surface of the shaft portion and whose lower end face abuts against the base plate without being welded to it.

5. The column base hardware according to claim 2, the base plate is provided with the shaft portion standing upright at its center, and the bolt holes are provided on both sides of the shaft portion on one diagonal line passing through the center of the base plate, and the length on the one diagonal line is formed to have a width greater than the length in the direction of another diagonal line perpendicular to the one diagonal line; the shaft support member is provided on the upper surface side of the base plate in the other diagonal direction so as not to overlap above the bolt hole, The upper plate portion has a substantially square shape in a plan view, with the shaft accommodating notch provided at one corner, a first shaft welding vertical plate portion and a second shaft welding vertical plate portion as the plurality of shaft welding vertical plate portions extending from two cutout portion continuous sides that are continuous with the shaft accommodating cutout portion among the four sides of the upper plate portion toward the lower plate portion, each having a vertical end surface welded to an outer surface of the shaft portion and a lower end surface welded to the base plate, A column base hardware characterized in that a non-welded vertical shaft portion is provided, extending from at least one of the two notch opposing sides facing each of the two notch continuous sides toward the base plate, the vertical end surface of which is not welded to the outer surface of the shaft portion, and the lower end surface of which is arranged so as to protrude from the base plate.

6. The column base hardware according to claim 1, The base portion is composed of two shaft support members, The two shaft support members each include: the lower plate portion having a shaft accommodating notch formed therein so as to accommodate a portion of the shaft portion; a first shaft welding upright portion and a second shaft welding upright portion that rise from two notch continuous sides that are continuous with the shaft accommodating notch portion of the lower plate portion, and whose vertical end surfaces are welded to the outer surface of the shaft portion; the upper plate portion is bent from an upper end of the first shaft welding vertical plate portion and is provided parallel to the lower plate portion, and is provided with a shaft accommodating notch that is notched so as to accommodate a part of the shaft portion; a shaft non-welded upright portion bent and extending downward from a side of the upper plate portion facing the first shaft-welded upright portion, A column base hardware characterized in that the vertical end surfaces of the first shaft welding vertical plate portion and the second shaft welding vertical plate portion of each of the two sets of shaft support members are welded to the outer surface of the shaft portion.

7. An anchor bolt extending upward from the foundation is passed through the bolt hole in the lower plate of the column base metal according to any one of claims 1 to 6 and fastened with a nut to fix the column base metal on a cross member such as a foundation or base, A building characterized in that the lower end of a pillar is abutted against the upper plate of the pillar base hardware, the shaft portion of the pillar base hardware is inserted into the shaft insertion portion provided at the lower end of the pillar, and the pin insertion hole provided in the pillar is aligned with the pin insertion hole in the shaft portion and a drift pin is passed through, thereby fixing the pillar to a cross member such as a foundation or base via the pillar base hardware.

Images