JP2018131739A - Irregularity correcting jig for steel frame column - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jig which contributes to reduction in labor required for correcting irregularity of a steel frame for a column.SOLUTION: A jig (110) is used to correct an irregularity generated between a lower steel frame (12) for a column installed previously and an upper steel frame (14) for a column to be added to a lower steel frame.The jig is composed of a lever member (20) and a bolt (22).The lever member has one end portion (28) and the other end portion (30) which can be respectively opposed to two tabular erection pieces (16 18) respectively provided at the ends of the steel frame, and a hook-shaped portion (26) which can be opposed to one of the two erection pieces on the other side through the space between the two erection pieces.The bolt (22) is screwed into one end of the lever member and has a tip portion (22a) which can be opposed on one side of the two erection pieces on one side thereof.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a difference between a lower steel frame for a column previously installed in the construction method of the steel column and an upper steel frame added to the lower steel frame, that is, an upper steel frame with respect to the lower steel frame. It is related with the jig | tool used in order to correct | amend the shift | offset | difference regarding the horizontal direction.

  Conventionally, a jig used to correct such a mistake has been proposed. The jig includes a plate body having a main body and a hooking portion, a pair of nuts attached to both end surfaces facing each other of the plate body, and a pair of bolts respectively screwed to both nuts. The hook portion protrudes from the main body substantially parallel to the nut.

  In the conventional jig, in use, the hook portion of the plate body is passed between the upper and lower steel erection pieces where the misunderstanding has occurred, and the hook portion is one of the erection pieces of the both steel frames, for example, The steel piece is hooked on the lower steel erection piece, and then the bolt screwed into the nut facing the lower steel erection piece is advanced at this time so that the tip of the bolt is brought into contact with the lower steel erection piece. Next, a bolt screwed into a nut facing the upper steel erection piece is advanced to apply a horizontal external force to the upper steel erection piece. As a result, the upper steel frame is moved horizontally on the lower steel frame, and the misalignment, which is a shift in the horizontal direction of the upper steel frame with respect to the lower steel frame, is corrected.

JP 2002-194897 A

  By the way, horizontal movement of the upper steel frame, which is a heavy object, requires a lot of labor for the rotation operation of the bolt. The correction of the mistake in the steel frame is an operation performed at a high place, and it is desirable that the labor required for this is as small as possible from the viewpoint of ensuring safety.

  Accordingly, an object of the present invention is to provide a jig that contributes to a reduction in labor required for correcting misplacement of steel frames for columns.

  The present invention relates to a jig used to correct a misalignment generated between a lower steel frame for a column installed earlier and an upper steel frame for a column added to the lower steel frame, A jig | tool consists of a lever member and a volt | bolt. The lever member is provided with one erection piece and two other erection pieces that can be opposed to two plate-like erection pieces respectively provided at the ends of both steel frames on one side thereof, and between both erection pieces. And a hook-shaped portion that can be opposed to the other side. The bolt has a tip that is screwed into one end of the lever member and can be opposed to one of the two erection pieces on one side. The lever member is made of, for example, a plate.

  In the jig according to the present invention, when the jig is used, the hook-shaped portion of the lever member is passed between the erection pieces of the upper and lower steel frames in which the misunderstanding occurs, and the lever member is connected to one end portion and the other end portion thereof. Are opposed to one and the other of the two erection pieces, for example, a lower steel erection piece (lower erection piece) and an upper steel erection piece (upper erection piece) on one side thereof, and the saddle-shaped portion In a state facing the lower erection piece on the other side. At this time, the tip of the bolt screwed into one end of the lever member faces the lower erection piece on one side. Next, this is advanced by turning the bolt, and its one end is pressed against the lower erection piece. Along with this, one end and the other end of the lever member abut against the lower erection piece and the upper erection piece, respectively. Next, when the bolt is further rotated, one end portion of the lever member moves relative to the bolt in the axial direction. Accordingly, the lever member rotates around the lower erection piece, and applies a horizontal external force to the upper erection piece with the lower erection piece as a reaction force support at the other end. As a result, the upper steel frame moves horizontally on the lower steel frame, and the difference between the two steel frames is corrected or eliminated.

  According to this invention, the said lever member exhibits the function of a lever in correction | amendment of the said mistake. For this reason, by applying a relatively small force to one end of the lever member, a relatively large force can be applied to the upper steel frame, which is a heavy object, at the other end of the lever member. From this, the force required for the rotation operation of the bolt performed to apply force to one end of the lever member can be made relatively small, thereby reducing the labor required for correcting the misunderstanding. Can be planned. In addition, according to the present invention, it is possible to provide a mistake correction jig that has a simpler structure, is lighter, and easier to handle than the conventional mistake correction jig. This is also possible, and this also contributes to a reduction in the effort required to correct the mistakes.

It is a perspective view of the jig for correction of mistakes concerning one embodiment of the present invention. It is a side view of the mistake correction jig attached to the erection piece of the steel frame for both upper and lower columns. FIG. 3 is a rear view of the miscorrecting jig shown in FIG. 2. It is a side view of a mistake correction jig after correction of a mistake.

  Referring to FIG. 1, a jig according to an embodiment of the present invention is indicated generally by the reference numeral 10. The jig 10 includes a lever member 20 and a bolt 22. The lever member 20 is a member that exerts the function of the lever, and the bolt 22 is a member for applying a rotational force to the lever member 20.

  As shown in FIG. 2, the jig 10 has a misalignment that occurs between the lower steel frame 12 that is first installed and extends vertically and the upper steel frame 14 that is added to the steel frame, in the construction of the steel column. In other words, it is used to correct the horizontal displacement of the upper steel frame 14 relative to the lower steel frame 12. The jig 10 is attached to erection pieces 16 and 18, which will be described later, provided on both the steel frames 12 and 14 in order to correct the mistake.

  Both illustrated steel frames 12 and 14 are each made of a steel pipe having a rectangular cross-sectional shape, and the upper steel frame 14 is added onto the lower steel frame 12 by, for example, a crane (not shown) for addition to the lower steel frame 12. Suspended and placed on it.

  For suspension by the crane, a plurality of plate-like erection pieces 16 and 18 are attached to the upper and lower ends of both steel frames 12 and 14, respectively. More specifically, four erection pieces (lower erection piece) 16 are on the four side surfaces of the lower steel frame 12, and four erection pieces (upper erection piece) 18 are on the four side surfaces of the upper steel frame 14. These are arranged so as to be orthogonal to these side surfaces and extend in the vertical direction. The upper and lower erection pieces 16 and 18 are usually arranged at the center of each side of the rectangle which is the cross-sectional shape of each steel frame 12 and 14. A gap S exists between the upper and lower erection pieces 16 and 18 on each side surface.

  The lever member 20 of the jig 10 is made of a steel plate having a rounded planar shape or outline as a whole, and is disposed parallel to these side surfaces with respect to the upper and lower steel frames 12 and 14 (see FIG. 3). As shown in FIG. 2, the lever member 20 includes a main body 24 extending in the vertical direction (vertical direction) and a hook-shaped portion 26 projecting from the main body in the horizontal direction. The main body 24 has both end portions that respectively define one end portion 28 and the other end portion 30 of the lever member 20.

  As shown in FIG. 2, the hook-shaped portion 26 of the lever member 20 has a length dimension that allows the gap S between the erection pieces 16, 18 of both the lower and upper steel frames 12, 14 to be inserted. The hook portion 26 has a tip portion 32. The distal end portion 32 is disposed closer to the other end 30 than an intermediate position between the one end 28 and the other end 30 of the lever member 20 so that the lever member 20 can function as a lever. In other words, with respect to the longitudinal direction of the main body 24, the distance a between the one end portion 28 of the lever member 20 and the tip portion 32 of the hook-shaped portion 26 is between the other end portion 30 and the tip portion 32 of the hook-shaped portion 26. Is set to be greater than the distance b (a> b).

  The bolt 22 is screwed into one end portion 28 of the lever member 20 and penetrates through the one end portion. More specifically, the thread of the bolt 22 is engaged with a thread groove (not shown) provided in the one end portion 28. The bolt 22 is preferably arranged so as to be orthogonal to the erection piece 16 of the lower steel frame 12 when the jig 10 is attached to both the steel frames 12 and 14 as shown in FIG.

  The jig 10 can be attached to the upper and lower erection pieces 16 and 18 as follows.

  First, the hook-shaped portion 26 of the lever member 20 is passed between the two erection pieces 16 and 18 (S), and the hook-shaped portion 26 is placed on the erection piece 16 below. At this time, the one end portion 28 and the other end portion 30 of the lever member 20 are respectively connected to the lower erection piece 16 and the upper erection piece 18 on one side thereof (right side in FIG. 2), that is, one of these side surfaces 16a and 18a. Opposite side. Further, the bowl-shaped portion 26, more precisely, the tip portion 32 thereof faces the lower erection piece 16 on the other side (left side in FIG. 2), that is, on the other side surface 16b side. Moreover, the front-end | tip part 22a of the volt | bolt 22 screwed together by the one end part 28 of the lever member 20 opposes the lower erection piece 16 in the one side (one side 16a side).

  Next, the bolt 22 is turned to advance the tip 22a toward the lower erection piece 16 and press against it. Thereby, the lever member 20 is slightly rotated counterclockwise around the lower erection piece 16 as viewed in FIG. 2, and the other end 30 of the lever member 20 and the tip end portion 32 of the hook-shaped portion 26 are respectively In the part 34, 36 of the peripheral surface of the plate body that defines these contours, it abuts against one side surface 18 a of the upper erection piece 18 and the other side surface 16 b of the lower erection piece 16. Thereby, the attachment of the jig 10 is completed.

  Thereafter, the bolt 22 is turned. At this time, the front end 22a of the bolt 22 abuts against one side surface 16a of the lower erection piece 16 and further progress is stopped, so that the lower erection piece 16 is caused to react with the rotation of the bolt 22. As a support, one end portion 28 of the lever member 20 moves relative to the bolt 22 in the axial direction, and gradually moves away from the lower erection piece 16. In the illustrated example, the tip 22a of the bolt 22 is formed of a part of a spherical surface. Thereby, the contact resistance of the front-end | tip part 22a of the volt | bolt 22 with respect to the lower erection piece 16 can be reduced, and the force required for rotation of the volt | bolt 22 can be made smaller.

  With the rotation operation of the bolt 22, the lever member 20 rotates counterclockwise around the lower erection piece 16. During the rotation, the tip portion 32 of the bowl-shaped portion 26 slides on the side surface 16b of the lower erection piece 16 in a part 36 of the peripheral surface of the plate body that defines the contour thereof. Along with this, the other end 30 of the lever member 20 slides on one side surface 18a of the upper erection piece 18 at a part 34 of the peripheral surface of the plate body that defines the contour thereof, and a horizontal external force is applied thereto. Effect. As a result, the upper steel frame 14 moves on the lower steel frame 12 in the horizontal direction. The horizontal movement of the upper steel frame 14 corrects or eliminates the misunderstanding of the lower steel frame 12 (FIG. 4). In the illustrated example, in order to make the resistance to sliding of the tip portion 32 and the other end portion 30 of the bowl-shaped portion 26 smaller, the peripheral portions 34 and 36 that define these contours are respectively cylindrical surfaces. It consists of a part. After correcting the mistake, by loosening the bolt 22, the jig 10 can be removed from both the erection pieces 16 and 18, and can be reused.

  The lever member 20 exhibits a lever function in correcting the misplacement. For this reason, by applying a relatively small force to the one end portion 28 of the lever member 20, a relatively large force can be applied from the other end portion 30 of the lever member 20 to the upper steel frame 14, which is a heavy object. From this, the force required for the rotation operation of the bolt 22 performed to apply a force to the one end portion 28 of the lever member 20 can be made relatively small, thereby reducing the labor required for correcting the mistake. Can be achieved.

  Instead of the illustrated example, the jig 10 can be attached to both the erection pieces 16 and 18 while being turned upside down as shown in FIG. According to this, the one end portion 28 (the tip portion 22a of the bolt 22) and the other end portion 30 of the lever member 20 face the other side surface 18b of the upper erection piece 18 and the other side surface 16b of the lower erection piece 16, respectively. In addition, the front end portion 32 of the bowl-shaped portion 26 faces the one side surface 18a of the upper erection piece 18. In this case, when the bolt 22 is rotated after the attachment of the lever member 20 to the two erection pieces 16, 18 performed by advancing the bolt 22, the lever member 20 rotates counterclockwise around the upper erection piece 18. The other end 30 of the lever member 20 is pressed against the lower erection piece 16, and the hook-shaped portion 26 of the lever member 20, more specifically, the tip end portion 32 exerts a horizontal external force on the upper steel frame 14. Thereby, the upper steel frame 14 moves horizontally with respect to the lower steel frame 12, and the misunderstanding of the upper steel frame 14 with respect to the lower steel frame 12 is corrected or eliminated.

  According to the illustrated example in which the lever member 20 of the jig 10 is made of a plate body, the upper and lower erection pieces 16, 18 may be attached to prevent the upper steel frame 14 from falling over. The jig 10 can be installed between the prevention jig 38 (FIG. 3) and the upper and lower steel frames 12 and 14. However, the lever member 20 is composed of a rod-shaped body, for example, a rod-shaped main body 24 extending straight and a rod-shaped hook-shaped portion 26 extending L-shaped from the main body, instead of the illustrated example. Is possible.

DESCRIPTION OF SYMBOLS 10 Jig 12 Lower steel frame 14 Upper steel frame 16 Lower erection piece 18 Upper erection piece 20 Lever member 22 Bolt 22a Bolt tip 24 Main body 26 Hook-shaped part 28, 30 One end part and the other end part 32 The tip of the bowl

Claims (2)

A jig used to correct a misalignment between a lower steel frame for a column installed earlier and an upper steel frame for a column added to the lower steel frame,
It consists of an insulator member and a bolt,
The lever member is provided with one erection piece and two other erection pieces that can be opposed to two plate-like erection pieces respectively provided at the ends of both steel frames on one side thereof, and between both erection pieces. Having a bowl-shaped portion that can be opposed to the other side of
The said bolt is a jig | tool which has the front-end | tip part which is screwed by the one end part of the said lever member, and can oppose with respect to one of both erection pieces.   The jig according to claim 1, wherein the lever member is made of a plate.

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