JP2005171501A - Fitting for column base - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fitting for a column base, which is applicable by itself to a column different in diameter. <P>SOLUTION: The fitting 20 for the column base abuts on a lower end of the column 2 having a circular or a polygonal hollow cross section, and supports the column. The fitting is integrally formed of a plate-like base portion 12, and a protrusion 22. The base portion is fixed to an upper surface of a foundation and has mounting holes 13 formed therein. The protrusion has a tapered side surface 24 and is formed like a truncated almost conical shape or a truncated almost polygonal pyramidical shape. Further the tapered side surface 24 has a connecting recess 26 formed therein at an arbitrary location between an upper edge and a lower edge of the tapered side surface, for connecting thereto a lower edge of the support 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a column base for fixing a pillar such as a road sign, a streetlight or a flag pole, or a pillar used for a building or the like to an upper surface of a foundation such as a concrete foundation.

  Conventionally, when installing road signs, street lamps, flagpoles, and the like, steel pipes having a hollow cross section such as a round shape or a square shape have been widely used as support columns thereof. Moreover, such a steel pipe was sometimes used as a support for a building.

  For example, as shown in FIG. 6, when installing such a steel pipe column 2, the lower end 2 a in the length direction is joined to the column base 6 by welding, and the column base 6 is anchor bolt. There are some which are fixed to the upper surface 10a of the concrete foundation 10 through the nut 8 and the nut 14 (for example, Patent Document 1).

  The anchor bolt 8 is embedded in the concrete foundation 10, and the male threaded portion 8 a at the upper end of the anchor bolt 8 protrudes from the upper surface 10 a of the concrete foundation 10. The column base 6 is placed on the upper surface 10a of the concrete foundation 10 so that the male screw portion 8a of the anchor bolt 8 is inserted into the mounting hole 13 formed in the base portion 12, and the nut is attached to the male screw portion 8a. 14 is fastened and fixed.

  The column base 6 is formed with a protruding portion 17 that protrudes toward the upper surface 12 a of the base portion 12. The projecting portion 17 has a thickness larger than that of the base portion 12 and is formed so that the horizontal planar shape corresponds to the inner shape of the hollow cross section of the support column 2. It can be fitted and welded to the peripheral portion of the protrusion 17.

JP 2000-336776 A

  However, such column base hardware is generally manufactured by casting or forging, but there are cross-sectional shapes such as round and square, and various diameters for each cross-sectional shape. Since the shape and size of the column base metal used change depending on the shape and size of the support, there is a problem that the types and number of casting and forging dies increase, and there is a new shape and size. However, there was a problem that a new mold had to be manufactured.

  In view of the above problems, an object of the present invention is to provide a column base hardware in which one column base hardware can be used for a column having various diameters.

In order to solve the above problems, the present invention
A column base metal that joins and supports the lower end of a column having a round or polygonal hollow cross section,
A plate-like base portion fixed to the upper surface of the foundation and having a mounting hole, and a substantially truncated cone-shaped or polygonal truncated cone-shaped protrusion having a tapered side surface are integrally formed,
A joining recess for joining the lower end portion of the support column is formed at an arbitrary position between the upper end and the lower end of the tapered side surface.

  According to such a column base metal of the present invention, one column base metal can be used for a column having various diameters.

  Hereinafter, embodiments of the column base hardware according to the present invention will be specifically described with reference to the drawings.

  FIG.1 and FIG.2 is a figure referred in order to demonstrate the column base metal object 20 which concerns on the 1st Embodiment of this invention. In the column base hardware 20 shown in these drawings, the same parts as those of the conventional column base metal 6 shown in FIG.

As shown in FIG. 1, a protrusion 22 is formed at the center of the upper surface 12 a of the base 12 of the column base 20. The projecting portion 22 is formed in a truncated cone shape that leaves only the portion on the hem side of the cone, the inner portion thereof is hollow, and the shaft hole 23 penetrates the base portion 12 in the vertical direction. doing.
And in this protrusion part 22, the joining recessed part 26 which joins the lower end part of the support | pillar 2 to the taper-shaped side surface 24 of the frustoconical periphery is formed in the endless shape in the circumferential direction.

  As shown in FIG. 2, when a column 2 having a round hollow cross section, as shown by a two-dot chain line in the drawing, is joined to a joint recess 26 of a column base metal 20, a joint formed on a tapered side surface 24 thereof. The end surface of the lower end portion 2a of the support column 2 abuts against the horizontal surface 26a of the recess portion 26, and the inner peripheral surface of the lower end portion 2a of the support column 2 is fitted to the vertical surface 26b of the joint recess portion 26. The upper end 24 a of the tapered side surface 24 above the joint recess 26 is separated from the inner peripheral surface of the support column 2.

  Further, since the end surface of the lower end 2 a of the support column 2 abuts against the horizontal surface 26 a of the bonding recess 26, the inclined surface of the lower end 24 b of the tapered side surface 24 below the bonding recess 26, and the support 2 Since the outer peripheral surface intersects at an obtuse angle of 90 ° or more in these vertical cross sections, the lower end portion 24b of the tapered side surface 24 and the outer peripheral surface of the support column 2 are smoothly connected in the above cross section.

  In addition, the protruding portion 22 of the column base metal 20 does not initially have the bonding recess 26 on the tapered side surface 24, but the diameter of the vertical surface 26b of the bonding recess 26 is the column 2 to be bonded thereto. In order to correspond to the size of the inner diameter of the hollow cross section, the taper side surface 24 is later cut to form the joint recess 26.

  Therefore, regardless of the inner diameter of the round hollow cross section of the column 2, the endless joining concave portion 26 having the vertical surface 26 b having a diameter corresponding to the inner diameter of the hollow cross section is formed on the tapered side surface 24. It can be formed at any position between the upper end and the lower end, and can be formed so that the inclined surface of the lower end portion 24b of the tapered side surface 24 and the outer peripheral surface of the column 2 are smoothly connected.

  As shown in FIG. 1, the column base 20 has a pedestal portion 28 on the upper surface 12 a of the base portion 12, in which the upper surface contacts the lower surface of the nut 14 to be fastened to the anchor bolt 8 in the vicinity of the mounting hole 13. ing. The upper surface of the pedestal portion 28 is formed substantially parallel to the bottom surface of the base portion 12, whereas the portion other than the pedestal portion 28 on the upper surface 12 a of the base portion 12 is away from the center of the base portion 12. It is formed so that the wall thickness becomes thinner.

  According to the column base 20 according to the present embodiment as described above, one column base 20 can be used for the column 2 having various diameters by changing the formation position of the joint recess 26. Therefore, the types of column base hardware can be reduced, and therefore the types of casting and forging dies can be reduced.

  Further, a joining recess 26 for joining the lower end 2a of the support column 2 is formed at an arbitrary position between the upper end and the lower end of the tapered side surface 24, and the outer peripheral surface of the support column 2 joined to the joining recess 26 And the lower end 24b of the tapered side surface 24 are smoothly connected to each other, so that not only the appearance is refreshed, but also the safety and the environment can be improved.

  In addition, the column base 20 made of the base portion 12 and the protruding portion 22 has a hollow shape in which the shaft hole 23 penetrates in the vertical direction, so that the column base 20 can be reduced in weight, The material cost can be reduced and the cost increase can be prevented.

  Further, the shaft hole 23 of the column base 20 can be used to pass electric wiring or the like inside, and the shaft hole 23 can also be used as a drain hole.

  Further, on the upper surface 12 a of the base portion 12, a base portion 28 whose upper surface is in contact with the lower surface of the nut 14 to be fastened to the anchor bolt 8 is formed in the vicinity of the mounting hole 13. 8 can be brought into contact with the upper surface of the pedestal portion 28 in a horizontal plane to stabilize the tightening force.

  Further, the portion other than the pedestal portion 28 on the upper surface 12a of the base portion 12 is formed so that the thickness thereof decreases in the direction away from the center of the base portion 12, so that the column base metal 20 is reduced in weight. Can be

  Further, since the inclined surface of the lower end portion 24b of the tapered side surface 24 and the outer peripheral surface of the support column 2 are formed so as to smoothly swell at an obtuse angle of 90 ° or more, the support column 2 is bonded to the bonding recess 26. The welding amount can be reduced to one third of the welding amount when joining the lower end 2a of the column 2 to the protrusion 17 of the conventional column base metal 6 in FIG. Since the space can be expanded, the welding can be easily automated.

  Moreover, since the support column 2 is welded in the middle of the height of the protruding portion 22 that is far away from the bottom surface of the base portion 12, stress concentration due to heat transmitted to the base portion 12 during welding can be alleviated. It is possible to prevent the flatness of the base portion 12 from being deformed due to stress concentration due to heat.

Next, FIG. 3 is a figure referred in order to demonstrate the column base metal object 60 which concerns on the 2nd Embodiment of this invention.
Since the column base 60 according to the present embodiment has the protruding portion 22 similar to that of the first embodiment, it is possible to join a column having a round hollow cross section. The column base 60 is different from the first embodiment in that the shape of the base portion 32 is circular, but has the same effect as the first embodiment.

FIG. 4 is a view referred to for explaining a column base metal object 70 according to the third embodiment of the present invention.
Unlike the first and second embodiments, the column base hardware 70 according to the present embodiment is capable of joining the columns when the columns to be fixed have a substantially rectangular hollow cross section. It is what has become.

  That is, the column base 70 is formed in a quadrangular pyramid shape in which the projecting portion 42 leaves only a portion on the skirt side of the quadrangular pyramid, and in this respect, it is different from the first and second embodiments. Although different, the same effects as those of the first and second embodiments are achieved.

FIG. 5 is a view referred to for explaining a column base 80 according to the fourth embodiment of the present invention.
Unlike the first to third embodiments, the column base hardware 80 according to the present embodiment is capable of joining the columns when the columns to be fixed have a substantially octagonal hollow cross section. It is what has become.

  That is, the column base 80 is formed in an octagonal pyramid shape in which the projecting portion 52 leaves only the hem side portion of the octagonal pyramid. In this respect, the column base hardware 80 is different from the first to third embodiments. Although different, the same effects as those of the first to third embodiments are achieved.

It is a perspective view which shows the column base metal object 20 which concerns on the 1st Embodiment of this invention. It is side surface sectional drawing of the column base metal object 20 shown in FIG. It is a perspective view which shows the column base metal object 60 which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the column base metal object 70 which concerns on the 3rd Embodiment of this invention. It is a perspective view which shows the column base metal object 80 which concerns on the 4th Embodiment of this invention. It is side surface sectional drawing which shows the conventional column base metal object 6 and the support | pillar 2. FIG.

Explanation of symbols

2 pillar 2a lower end part 6 column base 8 anchor bolt 8a male screw part 10 concrete foundation 10a upper surface 12 base 12a upper surface 13 mounting hole 14 nut 17 projecting part 18 thick part 19 step 20 column base metal 22 projecting part 23 shaft hole 24 Tapered side surface 24a Upper end portion 24b Lower end portion 26 Joint recess 26a Horizontal surface 26b Vertical surface 28 Base portion 32 Base portion 42, 52 Protruding portion 60, 70, 80 Column base metal

Claims (3)

A column base metal that joins and supports the lower end of a column having a round or polygonal hollow cross section,
A plate-like base portion fixed to the upper surface of the foundation and having a mounting hole, and a substantially truncated cone-shaped or polygonal truncated cone-shaped protrusion having a tapered side surface are integrally formed,
A column base metal, wherein a joining recess for joining the lower end of the support column is formed at an arbitrary position between the upper end and the lower end of the tapered side surface. The column base metal according to claim 1, wherein the column base metal is formed in a hollow shape in which a shaft hole penetrates in a vertical direction from the base portion to the protruding portion. 3. The column base metal according to claim 1, wherein a pedestal portion is formed in the vicinity of the bolt hole of the base portion so that an upper surface is in contact with a lower surface of a nut screwed to an upper end portion of the anchor bolt.

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