JP4296101B2 - Mounting structure of erection piece to steel column - Google Patents

Description

  The present invention relates to a lower steel column having a rectangular cross-sectional shape and an erection piece mounting structure applied to an upper steel column connected to the lower steel column, more specifically, the lower steel column has a pair of upper and lower flanges. The present invention relates to an attachment structure for an erection piece in the case of having a pair of upper and lower diaphragms to which a steel beam is connected.

  When connecting the upper steel columns (new steel columns) to the lower steel columns (existing steel columns) in the construction of the columns, there is an erection piece consisting of plate pieces attached to these steel columns for lifting. It is used for position adjustment of the upper steel column relative to the lower steel column or prevention of falling.

  Specifically, the erection pieces are respectively attached to the upper end of each side of the lower steel column and the lower end of each side of the upper steel column so as to be perpendicular to the lower steel column. After placing the upper steel beam, a jig is attached to each of the four sets of upper and lower erection pieces, and by operating the jigs, position adjustment or fall prevention is performed for the upper steel column.

  When the lower steel column has a pair of upper and lower diaphragms, the steel beam on the lower side is connected to the side surface between the diaphragms of the lower steel beam and the webs and flanges of the steel beam to the two diaphragms. The position where the erection piece is attached to is limited to the side of the steel beam (see Patent Document 1 below).

JP-A-6-158717

  By the way, the width dimension of the steel beam (the width dimension of the flange) is not necessarily smaller than the width dimension of the side surface of the lower steel beam as described in the above-mentioned Patent Document 1, but actually it is more than that. There are many. In this case, it is not possible to secure a space for attaching the erection piece to the side of the steel beam, and it is not possible to adjust the position of the upper steel column using the erection piece.

  An object of the present invention is to attach an erection piece that can be applied even when the width dimension of the side surface of a lower steel column having a pair of upper and lower diaphragms is smaller than the width dimension of a steel beam connected thereto. To provide a structure.

  The present invention is applied to a lower steel column having a rectangular cross section having a side surface to which a steel beam having a pair of upper and lower flanges is connected and having a pair of upper and lower diaphragms and an upper steel column connected thereto. According to the mounting structure of the erection piece, with respect to the lower steel column, the erection piece is placed on the side surface of the lower steel column horizontally from the side surface between the diaphragms and between the flanges of the steel beam. The upper steel column is attached to the side of the upper steel column in a pair with the erection piece attached to the side of the lower steel column. In the present invention, the “side surface” of the steel column does not include a corner portion of the steel column.

  The erection piece is formed of, for example, a flat plate that intersects the side surface of the steel column non-perpendicularly or a mountain-shaped plate body that is orthogonal to the side surface of the steel column and then bends.

  According to the present invention, the erection piece extends from the side surface to the side surface of the lower steel column to which the steel beam is connected, horizontally between the diaphragms and between the flanges of the steel beam, and extends between the flanges. Therefore, it is possible to attach the erection piece to the lower steel column regardless of the width dimension of the side surface of the lower steel column and the width dimension of the steel beam. Further, an erection piece extending from the lower steel column projects to the outside from between both flanges of the steel beam, and an erection piece extending from the upper steel column is paired with an erection piece attached to the lower steel column. Therefore, the protruding end portions of these erection pieces can be used for fixing the position of the upper steel column or for attaching a jig used for preventing overturning.

  As such an erection piece, for example, a flat plate extending from the lower steel column crossing the side surface thereof at a non-right angle, or a mountain shape perpendicular to the side surface of the steel frame and then bent from the side surface of the lower steel column. It is possible to use a plate.

  1 and 2, and FIGS. 3 and 4, the lower steel column to which the attachment structure of the erection piece according to the present invention is applied and the upper steel column connected to the steel column are respectively And 10 and 12.

  The lower steel column 10 has a pair of upper and lower diaphragms 14 arranged in parallel with each other at the upper part thereof. More specifically, the lower steel column 10 is composed of a lower steel frame 16 and an upper steel frame 18, and the lower diaphragm 14 is disposed between and fixed to both the lower and upper steel frames 16, 18, The diaphragm 14 is placed on and fixed to the upper steel frame 18.

  Both diaphragms 14 each have a rectangular planar shape with a larger area, which is similar to the cross-sectional shape of the steel columns 10 and 12. Both diaphragms 14 and both steel columns 10 and 12 are arranged such that the four sides of the rectangle are parallel to each other. The rectangle which is the cross-sectional shape of the steel columns 10 and 12 is usually a square, but it does not prevent other rectangles from being formed.

  The upper steel column 12 is mounted on and fixed to the upper diaphragm 14 for joining to the lower steel column 10. The upper steel column 12 is disposed above the lower steel column 10 by using a crane or the like after the steel beam 20 is connected to the lower steel column 10. A plate-shaped erection piece is attached to the steel beams 10 and 12 for the suspension movement. The erection piece will be described in detail later. After that, the upper steel column 12 is adjusted in position and measures for preventing its fall through a postscript jig which is used by being attached to the erection piece.

  Four mounting brackets 24 that are orthogonal to the side surface 22 of the upper steel frame 18 are fixed to the four side surfaces 22 of the lower steel column 10. A steel beam 20 is connected to the lower steel column 10 via each mounting bracket 24 and both diaphragms 14. In the illustrated example, four steel beams 20 are connected to four side surfaces 22 of the lower steel beam. The number of steel beams 20 connected to the lower steel beam 10 varies between 2 and 4 depending on the position of the steel column in the building. Further, the side surface 22 of the lower steel column to which the steel beam 20 is connected is two side surfaces facing each other, two side surfaces adjacent to each other, three side surfaces, or all side surfaces as in the illustrated example.

  The steel beam 20 is made of H-shaped steel, and has a pair of upper and lower flanges 26 and a web 28 connected to them. For connection of the steel beam 20 to the lower steel column 10, each flange 26 of each steel beam 20 is abutted to each edge of both diaphragms 14 and welded later, and each steel beam is attached to each mounting bracket 24. The web 28 is bolted (in FIG.1 and FIG.3, the location of bolting is shown by the intersection of the vertical and horizontal imaginary lines).

  In the present invention, the erection piece 30 is attached to the lower steel column 10 in the following manner. That is, the erection piece 30 extends from the side surface to the side surface 22 of the lower steel column to which the steel beam 20 is attached, horizontally between the diaphragms 14 and between the flanges 26 of the steel beam, and to the outside between the flanges 26. Is attached. For the upper steel column 12, the erection piece 32 is paired with the erection piece 30 attached to the side 33 of the lower steel column on the side 34 of the upper steel column, for example, vertically attached. .

  Specifically, in the example shown in FIGS. 1 and 2, the erection piece 30 is formed of a flat plate and intersects each side surface 22 of the lower steel column at a non-right angle. The crossing angle can be set arbitrarily. The erection piece 32 extending from each side surface 34 of the upper steel column also crosses the side surface 34 at a non-right angle at the same crossing angle corresponding to the lower steel column 10.

  Moreover, in the example shown in FIG.3 and FIG.4, the erection piece 30 consists of a plate body bent in a mountain shape, orthogonal to the side surface 22 of the lower steel column, and then bent. The bending angle can be arbitrarily set. The erection piece 32 extending from each side 34 of the upper steel column is also bent at the same bending angle after being orthogonal to the side 34 in the same manner, corresponding to the lower steel column 10. The erection pieces 30 and 32 are attached to the steel columns 10 and 12, for example, by welding.

  According to this, regardless of the presence of the steel beam 20, even when the width dimension of the steel beam 20, that is, the width dimension of the flange 22 is larger than the width dimension of the side surface 22 of the lower steel column 10, the lower The erection piece 30 can be attached to the steel column 10, and any portion used for adjusting the position of the upper steel column 12 or preventing the fall of the steel beam 12 at a portion protruding between the flanges 22 of the steel beam. A jig 36 can be attached.

  In the illustrated example, the erection pieces 30 and 32 attached to the side surfaces 22 and 34 of the steel columns 10 and 12 extend at the same angle with respect to the side surfaces 22 and 34, and the steel columns 10 and 12. The mounting position in the circumferential direction is the same. However, it is not limited to this. That is, the two erection pieces 30 and 32 respectively attached to the side surface 22 having the lower steel beam and the side surface (corresponding side surface) 34 of the upper steel beam directly above the side surface and facing the same direction as the side surface. Only for each set of erection pieces 30 and 32, each of which extends at the same angle with respect to the side surfaces 22 and 34, and the mounting positions of the steel columns 10 and 12 in the circumferential direction are the same. If it is.

  However, in order to facilitate the operation for adjusting or correcting the position of the upper steel beam 12 by the jig 36, the two opposite side surfaces 22 of the steel column 10 and the two corresponding side surfaces 34 of the steel beam 12 are respectively opposite to each other. It is desirable that the two sets of erection pieces 30 and 32 to be attached are symmetric with respect to a point on the axis of the steel column as in the illustrated example.

  The jig 36 illustrated as an example is a pair of a main body 38 on a ring that can receive a pair of upper and lower erection pieces 30 and 32, and a pair of screws that are screwed to both sides of the main body 38 and extend toward the lower erection piece 30. A bolt 40, two bolts 42 that are screwed to one side of the main body 30 and extending toward the upper erection piece 32, and a bolt 44 that is screwed to the lower part of the main body 38 and extend toward the lower erection piece 30 With. Furthermore, the jig 36 includes a lever member 46 inserted into the main body 38 and disposed between the two erection pieces 30 and 32, and a bolt 48 that is screwed into the main body 38 and extends toward one end of the lever member 46.

  According to this jig 36, the jig 36 is fixed to the both erection pieces 30 and 32 by tightening the bolts 42 and 44, and the lower steel column is fixed by tightening one of the bolts 40 and loosening the other. The upper steel column 12 is moved in the horizontal direction using 10 as a reaction force support, whereby the horizontal position of the upper steel column 12 is adjusted. Further, when the one end portion of the lever member 46 is pushed down by the tightening operation of the bolt 48, the other end portion of the lever member 46 that is in contact with the lower erection piece 30 and the upper erection piece 32 through the wedge member 50 is The upper steel column 12 can be pushed up by rotating with the contact point with the lower erection piece 30 as a fulcrum, thereby adjusting the inclination of the upper steel frame. If the jig 36 is left attached after these adjustments, the upper steel column 12 is prevented from falling by these jigs 36.

  In the illustrated embodiment, the steel beam 26 is connected to the lower steel column 10 at all the side surfaces 22, but as described above, the steel beam 26 is connected to one or two side surfaces 22 of the lower steel column 10. May not be connected. In this case, the erection piece can be attached to the side surface 22 to which the steel beam 26 is not connected, preferably in the widthwise central portion of the side surface so as to be orthogonal to the side surface, as in the prior art.

  However, it is preferable to arrange the erection piece as in the illustrated example in order to facilitate the correction operation by the jig 36 even when the side surface 22 to which the steel beam 26 is not connected exists. In any case, the erection piece attached to the corresponding side surface of the upper steel column 12 is vertically symmetrical with the erection piece attached to the side surface of the lower steel column 10.

It is a partial front view which shows an example of this invention. It is a partial top view of an example shown in FIG. It is a partial front view which shows the other example of this invention. It is a fragmentary top view of the other example shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,12 Lower steel beam and upper steel column 14 Diaphragm 20,26 Steel beam and its flange 22,34 Steel beam side surface 30,32 Erection piece 36 Jig

Claims (3)

  Attachment of an erection piece applied to a lower steel column having a rectangular cross section having a side surface to which a steel beam having a pair of upper and lower flanges is connected and having a pair of upper and lower diaphragms and an upper steel column connected thereto In the structure, with respect to the lower steel column, the erection piece extends to the side surface of the lower steel column from the side surface in the horizontal direction between both diaphragms and between both flanges of the steel beam and to the outside between the two flanges. In addition, the upper steel column is attached to the side of the upper steel column in a pair with the erection piece attached to the side of the lower steel column.   The attachment structure according to claim 1, wherein the erection piece is formed of a flat plate that intersects a side surface of the steel column at a non-right angle.   The attachment structure according to claim 1, wherein the erection piece is formed of a mountain-shaped plate body that is orthogonal to a side surface of the steel column and then bends.

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