JP7466595B2 - Column base hardware - Google Patents

Description

The present invention relates to column base hardware.

Independent columns are known that are erected under conditions different from those erected via a base on the building's foundation, such as a slab or mat foundation. For example, Patent Documents 1 and 2 disclose a joint that is interposed between the foundation and the through column to fasten them together. Patent Document 3 discloses an independent wooden column that makes the wooden board covering less likely to crack and less susceptible to the effects of rainwater and moisture. Patent Documents 4 and 5 disclose joints for wooden buildings and column base hardware for wooden buildings that use anchor bolts to fix the column directly to the foundation concrete.

JP 2000-204676 A Japanese Patent Application Laid-Open No. 11-172767 JP 2012-52325 A Japanese Patent Application Laid-Open No. 11-148181 JP 2002-167868 A

However, the conventional joints and column base hardware used for independent columns are not easy to adjust in height, and combined with the fact that the top surface of the foundation is uneven, this makes it necessary to perform tedious adjustment work such as inserting adjustment packing. Furthermore, the joints and column base hardware are extremely thin in appearance compared to the columns themselves, have poor rigidity, and are simply components that connect the bottom ends of the columns, and are merely decorative as part of the columns, and are not part of the building structure, so there is a risk that they will easily collapse.

The present invention was made in consideration of the above situation, and its purpose is to provide a column base hardware that allows for easy height adjustment and combines design and rigidity.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The column base hardware 15 according to claim 1 of the present invention is a column base hardware 15 that is disposed between a lower end surface 34 of a column 33 that is an independent column constituting a building and an installation surface 39, and supports the column 33 and fixes it to the installation surface 39,
an upper cylinder body 21 having a cylindrical shape with a female thread 27 formed on an inner peripheral surface thereof, a top plate 29 on an upper end surface thereof, and an upper surface of the top plate 29 being in contact with a lower end surface 34 of the pillar 33 ;
a tenon member 23 having a female tenon thread 41 at its lower end, and fixed coaxially to the upper cylinder 21 by screwing a tenon fixing bolt 37 penetrating the top plate 29 from below inside the upper cylinder 21, and standing in close contact with the upper surface of the top plate 29 , and inserted into a mortise hole 24 opening in a lower end surface 34 of the pillar 33 , and a pin 45 passing across the pillar 33 passes through the tenon member 23 to prevent it from coming off the pillar 33 ;
a lower cylinder body 25 having a cylindrical shape with a male thread 47 formed on an outer peripheral surface thereof to screw into the female thread 27 of the upper cylinder body 21 , a bottom plate 49 on a lower end surface thereof, a through hole 57 in the bottom plate 49 through which an anchor bolt 51 fixed to the installation surface 39 passes, and the lower cylinder body 25 is fixed to the installation surface 39 from the inside of the cylinder ;
In addition,
The top plate 29 and the bottom plate 49 are formed with a diameter approximately equal to the thickness of the pillar 33, and the upper cylinder 21 and the lower cylinder 25 to which the top plate 29 and the bottom plate 49 are fixed are formed with a diameter slightly smaller than that of the top plate 29 and the bottom plate 49 .

In this column base hardware 15, the upper cylinder 21 fixed to the lower end surface 34 of the column 33 and the lower cylinder 25 fixed to the anchor bolt 51 of the installation surface 39 can be adjusted in height by screwing the female thread 27 and male thread 47 formed on both. Even if the distance from the installation surface 39 to the lower end surface 34 of the column 33 is different, the upper cylinder 21 and the lower cylinder 25 can be rotated relative to each other to increase or decrease the distance between the top plate 29 and the bottom plate 49, thereby supporting the lower end surface 34 of the column 33 on the installation surface 39. The column base hardware 15 has a top plate 29 and a bottom plate 49 formed with a diameter approximately equal to the thickness of the column 33, and the upper cylinder 21 and the lower cylinder 25 to which the top plate 29 and the bottom plate 49 are fixed are formed with a diameter slightly smaller than that of the top plate 29 and the bottom plate 49. The upper cylinder 21 and the lower cylinder 25 are screwed together to form a column shape. Therefore, when the column 33 is supported on the installation surface 39 with the column base hardware 15 interposed therebetween, the column base hardware 15 interposed between the column 33 and the installation surface 39 does not become extremely thin, and the appearance does not look delicate. Also, since the column base hardware 15 is column-shaped with an outer diameter slightly smaller than the column 33, it is possible to ensure high strength in the bending direction in addition to compression (buckling) and tension.

In addition, in this column base hardware 59, the tube portion of the upper tube 61 is in a square tube shape. For example, a hexagonal shape, that is, a hexagonal tube, is preferable as the square tube shape. By making the square tube shape hexagonal, it is possible to reuse commercially available hexagonal nuts. This makes it possible to reduce the material cost of the column base hardware 59. In this column base hardware 59, for example, a circular top plate 29 is coaxially fixed to the upper end surface of the hexagonal tube 63 by welding or the like. The lower tube 25 is of a size such that the male thread 47 at the upper end is screwed into the female thread 27 of the hexagonal tube 63. In this column base hardware 59, since the outer circumference of the upper tube 61 is hexagonal, the upper tube 61 can be easily rotated with little force when adjusting the rotation using a tool such as a spanner or wrench.

Furthermore, in this column base metal fitting 59, a covering body is fixed to the outer periphery 31 of the top plate 29. The covering body can cover the entire outer periphery of the upper cylinder 61. The top plate 29 is formed of, for example, a disk. A hexagonal tube 63 is coaxially fixed to the underside of this disk by welding or the like. The hexagonal tube 63 is sized so that the circumscribing circle of the hexagonal tube 63 fits inside the outer periphery of the top plate 29. The covering body can be a cylinder whose inner diameter fits into the outer diameter of the top plate 29. In this case, a hexagonal tube 63 with a circumscribing circle having a smaller diameter than the inner diameter of the covering body is used. As a result, the covering body fixed to the top plate 29 can accommodate and cover the hexagonal tube 63 in its inner diameter.

The column base hardware 65 according to claim 2 of the present invention is a column base hardware 65 that is disposed between a lower end surface 34 of a column 33 that is an independent column constituting a building and an installation surface 39, and supports the column 33 and fixes it to the installation surface 39,
an upper cylinder body 67 having a cylindrical shape with a male thread 47 formed on its outer circumferential surface, a top plate 29 on its upper end surface , and an upper surface of the top plate 29 in contact with the lower end surface 34 of the column 33 ;
a tenon member 23 having a female tenon thread 41 at its lower end, a tenon fixing bolt 37 penetrating the top plate 29 from below inside the upper cylinder 67, the tenon member 23 being coaxially fixed to the upper cylinder 67 and standing in close contact with the top surface of the top plate 29 , the tenon member 23 being inserted into a mortise hole 24 opening in a lower end surface 34 of the pillar 33 , and a pin 45 passing across the pillar 33 being inserted therethrough to prevent it from coming loose from the pillar 33 ;
a lower cylinder body 25 having a cylindrical shape with a male thread 47 formed on an outer peripheral surface, a bottom plate 49 on a lower end surface, a through hole 57 through which an anchor bolt 51 fixed to the installation surface 39 passes in the bottom plate 49 , and the lower cylinder body 25 is fixed to the installation surface 39 from the inside of the cylinder ;
a connecting cylinder 69 consisting of a cylinder having an internal thread 27 formed on its inner circumferential surface to be threaded with the external threads 47 of the upper cylinder 67 and the lower cylinder 25, the upper end of which is threaded into the upper cylinder 67 and the lower end of which is threaded into the lower cylinder 25, connecting the upper cylinder 67 and the lower cylinder 25, and adjusting the distance between the top plate 29 and the bottom plate 49 to match the distance from the installation surface 39 to the lower end surface 34 of the column 33 ;
In addition,
The top plate 29 and the bottom plate 49 are formed with a diameter approximately equal to the thickness of the pillar 33, and the upper cylinder 67 and the lower cylinder 25 to which the top plate 29 and the bottom plate 49 are fixed are formed with a diameter slightly smaller than that of the top plate 29 and the bottom plate 49 .

In this column base metal 65, the upper cylinder 67 and the lower cylinder 25 are connected via a connecting cylinder 69. The connecting cylinder 69 is a cylinder having a female thread 27 on the inner diameter portion, and the male thread 47 of the upper cylinder 67 is screwed to its upper end, and the male thread 47 of the lower cylinder 25 is screwed to its lower end. Therefore, the upper cylinder 67 can freely move forward and backward from the inner diameter portion at the upper end side of the connecting cylinder 69, and the lower cylinder 25 can freely move forward and backward from the inner diameter portion at the lower end side. The connecting cylinder 69 may have a female thread 27 formed only in the screwed range of the male thread 47, or the female thread 27 may be formed from the upper end to the lower end. In this case, the connecting cylinder 69 may be prepared in a plurality of different overall lengths by changing the length of the non-threaded portion between the upper end and the lower end. The connecting cylinder 69 may have a female thread 27 at the top end into which the upper cylinder 67 screws, and a female thread 27 at the bottom end into which the lower cylinder 25 screws, both formed with reverse threads. With a connecting cylinder 69 formed with reverse threads at the top and bottom, the upper cylinder 67 and the lower cylinder 25 can be moved forward and backward from the inner diameter at the same time by rotating the connecting cylinder 69. This allows the column base hardware 65 to quickly perform height adjustment work.

The column base hardware 15 of claim 3 of the present invention is the column base hardware of claim 1 or 2, characterized in that the through hole is an elongated hole 57, the short diameter of which is slightly larger than the outer diameter of the anchor bolt 51, and the long diameter of which is approximately three times the outer diameter of the anchor bolt 51 .

In this column base hardware 15, the through hole formed in the bottom plate 49 of the lower cylinder 25 is formed by an elongated hole 57. The elongated hole 57 has a minor diameter slightly larger than the outer diameter of the anchor bolt 51 and a major diameter larger than the outer diameter of the anchor bolt, which can be, for example, approximately three times larger. Therefore, by orienting the lower cylinder 25 so that the major diameter of the elongated hole 57 is aligned with the movement direction, adjustment movement of approximately three times the diameter of the anchor bolt in a 360° direction relative to the anchor bolt 51 becomes possible, and adjustment can be made if there is a misalignment between the anchor bolt 51 and the column 33.

In addition, the column base hardware 15 of the present invention may have the upper tube body 21 in a cylindrical shape.

In this column base hardware 15, the upper cylinder 21 is cylindrical. The upper cylinder 21 can be rotated relative to the lower cylinder 25, allowing the height to be adjusted by one pitch of the thread per rotation. At this time, since the upper cylinder 21 is formed in a cylindrical shape, there are no directional restrictions, unlike in the case of a square cylinder. This allows the rotation adjustment to be completed in any direction. In addition, the column base hardware 15 is screwed onto the lower cylinder 25 with a diameter approximately equal to the thickness of the column 33 to form a column, so the column base hardware 15 between the column 33 and the installation surface 39 does not become extremely thin, resulting in a good appearance.

And with this column base hardware, the upper tube has a relatively large diameter and is not excessively thin given the thickness of the column, so it does not look flimsy in appearance and has a good-looking column shape, and in addition to compressive (buckling) and tensile strength, it also has great strength in the bending direction and ensures rigidity.

According to the column base hardware described in claim 1 of the present invention, the height can be easily adjusted by relatively rotating the upper and lower cylinders according to the distance from the installation surface to the bottom end surface of the column. In addition, it is possible to combine decorativeness and design as a column with sufficient rigidity.

In addition, because this column base hardware has a square tube shape, the upper cylinder can be manufactured inexpensively using a commercially available product, and the upper cylinder can be easily rotated with a tool (wrench, etc.) when adjusting the height.

Furthermore, with this column base hardware, the covering body fixed to the outer edge of the top plate can cover the entire outer surface of the upper cylinder, making the square cylinder look cylindrical and allowing for a good-looking column shape while still using an inexpensive commercially available product.

According to the column base hardware described in claim 2 of the present invention, the upper and lower cylinders that screw into the connecting cylinder at the top and bottom can be adjusted separately, and by preparing connecting cylinders of different lengths, it is possible to accommodate independent columns whose distance from the installation surface to the bottom end surface of the column varies greatly beyond the adjustment range.

According to the column base hardware described in claim 3 of the present invention, the position of the lower cylinder can be finely adjusted and fixed relative to the position of the anchor bolt, so that the positional deviation between the anchor bolt and the column can be absorbed within the range of the long hole.

1 is an oblique view of a column base fitting according to a first embodiment used on an independent column supporting the eaves of an entrance porch. This is an exploded oblique view of a column base fixing structure using column base hardware. 1A is a bottom view of the upper cylindrical body, and FIG. 1B is a side view of the upper cylindrical body. A side cross-sectional view of a column supported on an installation surface 39 by a column base fitting according to the first embodiment. 4A is a side view of the lower cylindrical body, and FIG. 4B is a plan view of the lower cylindrical body. 13 is an explanatory diagram of a lower cylinder body that can move relative to the anchor bolt. FIG. An oblique view of a column base hardware according to the second embodiment. 1A is a side view of the upper cylindrical body, and FIG. 1B is a bottom view of the upper cylindrical body. A side cross-sectional view of a column supported on an installation surface by a column base hardware relating to the second embodiment. 4A is a plan view of the lower cylindrical body, and FIG. 4B is a side view of the lower cylindrical body. An oblique view of the main parts of the column base hardware relating to the third embodiment. A side cross-sectional view of a column supported on an installation surface by a column base hardware relating to the third embodiment.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[First embodiment]
FIG. 1 is a perspective view of a column base metal fitting 15 according to a first embodiment used for an independent column supporting an eaves 13 of an entrance porch 11. FIG.
The column base hardware 15 according to the first embodiment can be used, for example, for an independent column supporting the eaves 13 of an entrance porch 11. For example, in the entrance porch 11 of a wooden building, the use of a wooden column is preferred in order to give the independent column a sense of unity in design. When there is a step 19 between the approach and the entrance door 17, the column base lower end surface 34 of the wooden column is supported by the step 19 of concrete or the like via the column base hardware 15.

FIG. 2 is an exploded perspective view of a column base fixing structure using a column base metal fitting 15. As shown in FIG.
The column base hardware 15 according to the first embodiment has an upper cylinder body 21, a tenon member 23, and a lower cylinder body 25. These members can be suitably made of iron.

FIG. 3A is a bottom view of the upper cylindrical body 21, and FIG. 3B is a side view of the upper cylindrical body 21.
The upper cylinder 21 has a cylindrical body. In the first embodiment, the column base metal fitting 15 has the upper cylinder 21 formed in a cylindrical shape. A female thread 27 is formed on the inner peripheral surface of the body. The upper cylinder 21 is used in a direction in which the axis of the body is aligned vertically. A circular top plate 29, for example, is fixed to the upper end surface of the body by welding or the like. The top plate 29 is formed with an outer diameter slightly larger than the outer diameter of the body. In other words, the outer peripheral edge 31 of the top plate 29 protrudes slightly radially outward from the body. In the first embodiment, the top plate 29 is smaller than the circumscribing circle of the square of the column 33 having a square cross section and larger than the inscribing circle of the square. A fixing hole 35 is drilled in the center of the top plate 29. The upper cylinder 21 has the fixing hole 35, the body, and the top plate 29 formed coaxially. A tenon fixing bolt 37, which is a fastener inserted from the body side, protrudes upward from the top plate 29 into the fixing hole 35.

FIG. 4 is a side cross-sectional view of a column 33 supported on an installation surface 39 by a column base metal fitting 15 according to the first embodiment.
The tenon member 23 is made of a pipe or a bar material. The bar material may be a deformed steel bar. The tenon member 23 has a tenon female thread 41 formed on the lower end surface of the tenon. The tenon member 23 is fixed coaxially to the upper cylinder body 21 by a tenon fixing bolt 37 penetrating the top plate 29 of the upper cylinder body 21 from the main body side and screwing into the tenon female thread 41, so that the tenon member 23 stands upright. The tenon member 23 has a pin through hole 43 drilled at the upright end thereof, which penetrates in a direction perpendicular to the axis (see also FIG. 2). A plurality of pin through holes 43 may be provided at intervals in the vertical direction of the tenon member 23. A pin 45 is inserted into the pin through hole 43, which is driven in a direction transverse to the column 33 (direction perpendicular to the axis). The tenon member 23 is inserted into a mortise hole 24 opening in the lower end surface 34 of the column base, and the pin 45, which crosses the column 33, penetrates and is prevented from falling out.

FIG. 5A is a side view of the lower cylindrical body 25, and FIG. 5B is a plan view of the lower cylindrical body 25.
The lower cylinder 25 has a cylindrical body. A male thread 47 that screws into the female thread 27 is formed on the outer circumferential surface of the body. The lower cylinder 25 is used with the axis of the body aligned vertically. A circular bottom plate 49, for example, is fixed to the lower end surface of the body by welding or the like. The bottom plate 49 is formed with an outer diameter slightly larger than the outer diameter of the body. The lower cylinder 25 is fixed to the installation surface 39 with a through hole 57 at the center of the bottom plate 49 through which an anchor bolt 51 fixed to the installation surface 39 passes.

The anchor bolt 51 may be either one in which the male thread protrudes directly from the installation surface 39 (a core rod driven anchor) or one in which the anchor body with an internal thread is driven into the installation surface 39 and the male thread is screwed into the anchor body (an internally threaded anchor).

As shown in FIG. 2, the first embodiment illustrates a core rod driven anchor. In the core rod driven anchor, the anchor bolt 51 protruding from the installation surface 39 is passed through a long hole 57 drilled in the bottom plate 49 of the lower cylinder 25, and a washer 53 and a nut 55 are attached to the tip of the anchor bolt 51 to fix the lower cylinder 25 to the installation surface 39. On the other hand, although not shown, in the internal thread anchor, the anchor bolt 51 is passed through a long hole 57 drilled in the bottom plate 49 of the lower cylinder 25, and the tip of the anchor bolt is screwed into an internal thread anchor driven into the installation surface 39 to fix the lower cylinder 25 to the installation surface 39.

The through hole of the column base metal fitting 15 in the bottom plate 49 is formed as a long hole 57 that is long in the diameter direction of the bottom plate 49.

FIG. 6 is an explanatory diagram of the lower cylinder body 25 that is now movable relative to the anchor bolt 51.
The long hole 57 has a short diameter slightly larger than the outer diameter of the anchor bolt 51 and a long diameter larger than the outer diameter of the anchor bolt, for example, approximately three times as large. As a result, the lower cylinder body 25 has an attachment position adjustment range Aj with respect to the anchor bolt 51 from one longitudinal end side to the other longitudinal end side of the long hole 57.

Next, we will explain the function of the column base hardware 15 according to the first embodiment described above.

In the column base hardware 15 according to the first embodiment, the height of the upper cylinder 21, which is fixed to the lower end surface 34 of the column 33, and the lower cylinder 25, which is fixed to the anchor bolt 51 on the installation surface 39, can be adjusted by screwing together the female thread 27 and male thread 47 formed on both. Even if the distance from the installation surface 39 to the lower end surface 34 of the column 33 is different, the upper cylinder 21 and the lower cylinder 25 can be rotated relative to each other to increase or decrease the distance between the top plate 29 and the bottom plate 49, thereby supporting the lower end surface 34 of the column 33 on the installation surface 39 and connecting the column 33 to the installation surface 39.

The column base hardware 15 has a top plate 29 and a bottom plate 49 formed with a diameter approximately equal to the thickness of the column 33, and the upper cylinder 21 and the lower cylinder 25 to which the top plate 29 and the bottom plate 49 are fixed are formed with a slightly smaller diameter than the top plate 29 and the bottom plate 49. The upper cylinder 21 and the lower cylinder 25 are then screwed together to form a column shape. Therefore, when the column 33 is supported on the installation surface 39 with the column base hardware 15 in between, the column base hardware 15 between the column 33 and the installation surface 39 is not extremely thin and is positioned to provide firm support.

In addition, the column base hardware 15 is column-shaped with an outer diameter slightly smaller than that of the column 33, so it can ensure high strength in the bending direction as well as compression (buckling) and tension, and is rigid enough to serve as a structure supporting the column 33 against the installation surface 39 and the eaves 13 on the upper end side of the column 33.

In this column base hardware 15, the through hole formed in the bottom plate 49 of the lower cylinder 25 is formed as an elongated hole 57. The elongated hole 57 has a minor diameter slightly larger than the outer diameter of the anchor bolt 51 and a major diameter larger than the outer diameter of the anchor bolt, for example, approximately three times as large. Therefore, by orienting the lower cylinder 25 so that the major diameter of the elongated hole 57 is aligned in the direction of movement, adjustment movement of approximately three times the diameter of the anchor bolt in a 360° direction relative to the anchor bolt 51 is possible. As a result, the position of the lower cylinder 25 can be finely adjusted and fixed relative to the position of the anchor bolt 51, so that any misalignment between the anchor bolt 51 and the column 33 can be absorbed within the range of the elongated hole 57.

In addition, in this column base hardware 15, the upper cylinder 21 has a cylindrical shape. The upper cylinder 21 can be rotated relative to the lower cylinder 25, allowing the height to be adjusted by one pitch of the thread per rotation. In this case, because the upper cylinder 21 is formed in a cylindrical shape, there are no directional restrictions, unlike in the case of a square cylinder shape. This allows the rotation adjustment to be completed in any direction, making it possible to adjust the height steplessly.

In addition, the column base hardware 15 is screwed to the lower cylinder 25 with a diameter approximately equal to the thickness of the column 33 to form a column shape, so the column base hardware 15 between the column 33 and the installation surface 39 does not become extremely thin. As a result, the upper cylinder 21 has a relatively large diameter cylinder shape and does not become extremely thin due to the thickness of the column 33, so it does not look delicate, is a column shape that looks good, and also ensures rigidity.

The column base hardware 15 may be finished by painting the outer surface, or the male threads 47 of the lower cylinder 25 may be covered, to add design and color balance with the column 33 and the installation surface 39, or to improve rust resistance and weather resistance.

[Second embodiment]
Next, a second embodiment will be described.

Fig. 7 is a perspective view of a column base metal fitting 59 according to the second embodiment. In the second embodiment, the same members as those shown in Figs. 1 to 6 are designated by the same reference numerals, and duplicated explanations will be omitted.
In the column base hardware 59 according to the second embodiment, the main body of the upper cylinder 61 is formed in a polygonal rectangular cylindrical shape. The polygon may be, for example, a hexagon, an octagon, or a dodecagon.
The column base hardware 59 according to the second embodiment has a hexagonal tube shape as the main body of the upper cylinder 61, and is formed of a hexagonal tube 63. Like a general nut 55, the hexagonal tube 63 has a hexagonal cross section in the direction perpendicular to the axis, and an internal thread 27 is formed in the inner hole. A commercially available hexagonal nut can be used for this hexagonal tube 63.

FIG. 8A is a side view of the upper cylindrical body 61, and FIG. 8B is a bottom view of the upper cylindrical body 61.
The upper cylinder 61 has a circular top plate 29 fixed to the upper end surface of the main body by welding or the like. The top plate 29 is formed with an outer diameter slightly larger than the circumscribing circle of the hexagonal cylinder 63. In other words, the outer peripheral edge 31 of the top plate 29 protrudes slightly radially outward from the hexagonal cylinder 63. In the second embodiment, the top plate 29 is smaller than the circumscribing circle of the square of the column 33 with a square cross section and larger than the inscribing circle of the square. A fixing hole 35 is drilled in the center of the top plate 29. The upper cylinder 61 has the fixing hole 35, the hexagonal cylinder 63, and the top plate 29 formed coaxially. A tenon fixing bolt 37, which is a fastener inserted from the main body side, protrudes upward from the top plate 29 into the fixing hole 35.

FIG. 9 is a side cross-sectional view of a column 33 supported on an installation surface 39 by a column base metal fitting 59 according to the second embodiment.
The tenon member 23 has a tenon female thread 41 formed on the lower end surface of the tenon. The tenon member 23 is fixed coaxially to the upper cylindrical body 61 and stands upright by a tenon fixing bolt 37 penetrating the top plate 29 of the upper cylindrical body 61 from the main body side and screwing into the tenon female thread 41. A pin through hole 43 is drilled at the upright end of the tenon member 23, penetrating in a direction perpendicular to the axis. A pin 45 is inserted into the pin through hole 43, which is driven in a direction transverse to the column 33 (direction perpendicular to the axis). The tenon member 23 is prevented from coming off the column base lower end surface 34 by the pin 45 penetrating.

FIG. 10A is a plan view of the lower cylindrical body 25, and FIG. 10B is a side view of the lower cylindrical body 25.
The lower cylinder 25 used is the same as that in the first embodiment. That is, the lower cylinder 25 has a male thread 47 formed on the outer circumferential surface of the main body, which threadably engages with the female thread 27 of the hexagonal tube 63. The lower cylinder 25 has a circular bottom plate 49 fixed to the lower end surface of the main body by welding or the like. The bottom plate 49 is formed with an outer diameter slightly larger than the outer diameter of the main body. The lower cylinder 25 is fixed to the installation surface 39 by having a through hole in the bottom plate 49 through which an anchor bolt 51 fixed to the installation surface 39 passes (see also FIG. 9 ).

The through hole of the column base metal fitting 59 is formed in the bottom plate 49 as an elongated hole 57 that is long in the diameter direction of the bottom plate 49. The short diameter of the elongated hole 57 is slightly larger than the outer diameter of the anchor bolt 51, and the long diameter is larger than the outer diameter of the anchor bolt, for example, approximately three times as large. As a result, the lower cylinder 25 has an attachment position adjustment range Aj with respect to the anchor bolt 51 from one longitudinal end side to the other longitudinal end side of the elongated hole 57 (see FIG. 6).

The column base hardware 59 may be provided with a covering body (not shown) fixed to the outer periphery 31 of the top plate 29. The covering body may be formed of a cylinder that covers the entire outer periphery of the upper cylinder 21. That is, the covering body is made by processing a thin steel plate or the like into a cylindrical shape, and hides the hexagonal tube 63 as a cosmetic to make it look like a cylinder. The cylinder may have an inner diameter approximately equal to the outer diameter of the top plate 29, and the inner circumference may be fitted to the outer circumference of the top plate 29 and welded to the outer circumference, or may have an outer diameter approximately equal to the outer diameter of the top plate 29, and the upper end face may be welded to the lower surface of the top plate 29 coaxially. In the hexagonal tube 63, the six vertical faces that constitute it are not necessarily in the same direction as the four side faces of the column 33, and there are cases where it is not possible to achieve uniformity in the design of the column 33 and the column base hardware 59. The covering body can have a cylindrical appearance, that is, it is possible to replace the six faces of the hexagonal tube 63 with a continuous circumferential surface.

Next, we will explain the function of the column base hardware 59 according to the second embodiment.

In the column base hardware 59 according to the second embodiment, the tube portion of the upper tube 61 has a square tube shape. For example, a hexagonal shape is preferable, that is, a hexagonal tube 63. By making the square tube shape hexagonal, it is possible to reuse commercially available hexagonal nuts. This makes it possible to reduce the material cost of the column base hardware 59.

In this column base hardware 59, the outer circumference of the upper cylinder 61 is hexagonal, so that when adjusting the rotation, the upper cylinder 61 can be easily rotated with little force using a tool such as a spanner or wrench. As a result, the upper cylinder 61 can be manufactured inexpensively using a commercially available product, and the upper cylinder 61 can be easily rotated when adjusting the height.

In addition, in this column base hardware 59, a covering body may be fixed to the outer periphery 31 of the top plate 29. The covering body can cover the entire outer periphery of the upper cylinder 61. The top plate 29 is formed, for example, from a disk. A hexagonal tube 63 is coaxially fixed to the underside of this disk by welding or the like. The hexagonal tube 63 is sized so that the circumscribed circle of the hexagonal tube 63 fits inside the outer periphery of the top plate 29.

The cover fixed to the top plate 29 can accommodate and cover the hexagonal tube 63 in its inner diameter. As a result, the cover fixed to the outer periphery 31 of the top plate 29 can cover the entire outer periphery of the upper cylinder 61, making the hexagonal tube 63 appear cylindrical, allowing for a good-looking column shape while still using an inexpensive commercially available product.

[Third embodiment]
Next, a third embodiment will be described.

11 is a perspective view of a main part of a column base metal fitting 65 according to the third embodiment. In the third embodiment, the same members as those shown in Figs. 1 to 6 are designated by the same reference numerals, and duplicated explanations are omitted.
The main parts of the column base hardware 65 in the third embodiment are an upper cylindrical body 67, a lower cylindrical body 25, and a connecting cylindrical body 69.

FIG. 12 is a side cross-sectional view of a column 33 supported on an installation surface 39 by a column base metal fitting 65 according to the third embodiment.
The column base hardware 65 has an upper cylindrical body 67, a tenon member 23, a lower cylindrical body 25, and a connecting cylindrical body 69.

The upper cylinder 67 has a male thread 47 formed on its outer periphery and a top plate 29 on its upper end surface. The tenon member 23 is fixed coaxially to the upper cylinder 67 by a fixing bolt 37 penetrating the top plate 29 and stands upright, and a pin 45 is inserted into a mortise hole 24 opening in the lower end surface 34 of the column base and passes through the column 33 to prevent it from falling out. The lower cylinder 25 has a male thread 47 formed on its outer periphery and a bottom plate 49 on its lower end surface, and is fixed to the installation surface 39 with a through hole at the center of the bottom plate 49 through which an anchor bolt 51 fixed to the installation surface 39 passes. The connecting cylinder 69 has a female thread 27 formed on its inner periphery that screws with the male thread 47, and the upper end screws into the upper cylinder 67 and the lower end screws into the lower cylinder 25.

In the column base hardware 65, the through hole can also be formed as a long hole 57 that is long in the diameter direction of the bottom plate 49.

Next, we will explain the function of the column base hardware 65 according to the third embodiment.

In the column base hardware 65 according to the third embodiment, the upper cylinder 67 and the lower cylinder 25 are connected via a connecting cylinder 69. The connecting cylinder 69 is a cylinder having a female thread 27 on its inner diameter portion, with the male thread 47 of the upper cylinder 67 screwed into its upper end and the male thread 47 of the lower cylinder 25 screwed into its lower end. Therefore, the connecting cylinder 69 allows the upper cylinder 67 to move freely forward and backward from the inner diameter portion at the upper end, and the lower cylinder 25 to move freely forward and backward from the inner diameter portion at the lower end.

The connecting cylinder 69 may have the female thread 27 formed only in the range where the male thread 47 is screwed, or the female thread 27 may be formed from the upper end to the lower end. In this case, the connecting cylinder 69 may be prepared in a number of different overall lengths by varying the length of the non-threaded portion between the upper end and the lower end. As a result, by preparing connecting cylinders 69 of different lengths, the column base hardware 65 can be adapted to independent columns in which the distance from the installation surface 39 to the lower end surface 34 of the column 33 varies greatly beyond the adjustment range.

The connecting cylinder 69 may have a reverse thread formed in the female thread 27 at the upper end into which the upper cylinder 67 screws, and a reverse thread formed in the female thread 27 at the lower end into which the lower cylinder 25 screws. In a connecting cylinder 69 having reverse threads at the top and bottom, the upper cylinder 67 and the lower cylinder 25 can be moved forward and backward at the same time from the inner diameter by rotating the connecting cylinder 69. This allows the column base hardware 65 to quickly perform height adjustment work.

The column base hardware 65 according to the third embodiment can be combined with the first embodiment. In other words, the upper cylinder 67 and connecting cylinder 69 of the third embodiment and the upper cylinder 21 of the first embodiment can be made into a common lower cylinder 25, and if the distance from the installation surface 39 to the lower end surface 34 of the column 33 is short, the upper cylinder 21 of the first embodiment can be used, and if the distance is long, the upper cylinder 67 and connecting cylinder 69 of the third embodiment can be used in combination to accommodate each case.

Therefore, the column base hardware 15, column base hardware 59, and column base hardware 65 according to each of the above-mentioned embodiments allow for easy height adjustment, and can combine design and rigidity.

The present invention is not limited to the above-described embodiments, and it is intended that the various components of the embodiments be combined with each other, and that those skilled in the art may modify and apply the invention based on the description in the specification and well-known techniques, and this is within the scope of the protection sought.

For example, in the above configuration example, the column base hardware 15 (59, 65) was used for an independent column supporting the roof (eaves 13) of the entrance porch, but it may also be used in the main building when a column that is normally erected on a base is erected directly on the foundation, omitting the base.
The upper and lower cylinders can also be used upside down.

Reference Signs List 15: Column base hardware 21: Upper cylinder 23: Tenon member 24: Mortise hole 25: Lower cylinder 27: Female thread 29: Top plate 31: Outer periphery 33: Column 34: Column base lower end surface (lower end surface of column)
37... Fastener (fixing bolt)
39: Installation surface 45: Pin 47: Male screw 49: Bottom plate 51: Anchor bolt 57: Through hole (long hole)
59: Column base metal fittings 61: Upper cylinder body 65: Column base metal fittings 67: Upper cylinder body 69: Connecting cylinder body

Claims (3)

A column base metal fitting is disposed between a lower end surface of a column that is an independent column constituting a building and an installation surface, and supports the column and fixes it to the installation surface,
An upper cylinder body having a cylindrical shape with a female thread formed on the inner circumferential surface, a top plate on the upper end surface , and an upper surface of the top plate contacting the lower end surface of the column ;
a tenon member having a female tenon thread at its lower end, and fixed coaxially to the upper cylinder by screwing a tenon fixing bolt penetrating the top plate from below inside the upper cylinder, and standing in close contact with the top surface of the top plate , and inserted into a mortise hole opening on the lower end surface of the pillar , and a pin that crosses the pillar passes through the mortise member to prevent it from falling out of the pillar ;
a lower cylinder body having a cylindrical shape with a male thread formed on an outer peripheral surface thereof to be screwed into the female thread of the upper cylinder body, a bottom plate on a lower end surface thereof, a through hole in the bottom plate through which an anchor bolt to be fixed to the installation surface passes , and the lower cylinder body being fixed to the installation surface from the inside of the cylinder ;
In addition,
A column base hardware characterized in that the top plate and the bottom plate are formed with a diameter approximately equal to the thickness of the column, and the upper cylinder and the lower cylinder to which the top plate and the bottom plate are fixed are formed with a diameter slightly smaller than that of the top plate and the bottom plate . A column base metal fitting is disposed between a lower end surface of a column that is an independent column constituting a building and an installation surface, and supports the column and fixes it to the installation surface,
An upper cylinder body having a cylindrical shape with a male thread formed on the outer circumferential surface, a top plate on the upper end surface , and an upper surface of the top plate contacting the lower end surface of the column ;
a tenon member having a female tenon thread at its lower end, and a tenon fixing bolt that penetrates the top plate from below and is screwed into the inside of the upper cylinder, so that the tenon member is fixed coaxially to the upper cylinder and stands in close contact with the top surface of the top plate , and is inserted into a mortise hole that opens into the lower end surface of the pillar , and a pin that crosses the pillar passes through the mortise member to prevent it from falling out of the pillar ;
a lower cylinder body that is tubular with a male thread formed on its outer circumferential surface, has a bottom plate on its lower end surface, has a through hole in the bottom plate through which an anchor bolt that is fixed to the installation surface passes , and is fixed to the installation surface from inside the cylinder ;
a connecting cylinder consisting of a cylinder having an internal thread formed on its inner circumferential surface to be screwed with the external threads of the upper cylinder and the lower cylinder , the upper end of which is screwed with the upper cylinder and the lower end of which is screwed with the lower cylinder, connecting the upper cylinder and the lower cylinder to adjust the distance between the top plate and the bottom plate to match the distance from the installation surface to the lower end surface of the column;
In addition,
A column base hardware characterized in that the top plate and the bottom plate are formed with a diameter approximately equal to the thickness of the column, and the upper cylinder and the lower cylinder to which the top plate and the bottom plate are fixed are formed with a diameter slightly smaller than that of the top plate and the bottom plate . The column base hardware described in claim 1 or 2, characterized in that the through hole of the lower cylinder is an elongated hole, the short diameter of which is slightly larger than the outer diameter of the anchor bolt, and the long diameter of which is approximately three times the outer diameter of the anchor bolt .

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