JPH0762885A - Steel post alignment jig device - Google Patents

Abstract

PURPOSE:To enhance workability by laying out four sets of alignment frames at a cornered area in the upper part of the outside of an existing steel post in a crossed state and setting up a plurality of guide rollers on the inner surface of each alignment frame and fixing each alignment frame with an area around the existing steel post. CONSTITUTION:Four sets of alignment frames 3 are laid out at a cornered area in the upper part of the outside of a steel post 1 in a crossed state at 90 deg.. Then, bolts 7 are inserted between each of the alignment frames 3 and if both ends of the bolts 7 are fastened with buts 8, an extended part 3a of each alignment frame 3 will be positioned at the cornered area of the steel post 1 in a vertical state so that each guide roller 6 may be accordingly laid out in the upper part of the cornered part at an interval of 90 deg.. Then, the steel post 1 is suspended with a crane or the like. When the lower end cornered area of the steel post is positioned on the state suspended on the inner side from the radius of an arbitrary guide roller 2, each of which is laid out in an intersected state, it is possible to suspend a jig device 2, allowing the device to be in contact with a rotary surface of the guide roller 6. After the completion of suspension work, a fixing plate is laid out to both sides of flanges 1a which are butted with the other two sides of the steel post 1 and used to connect the both flanges 1a with bolts and nuts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positioning jig device for linearly joining an existing steel frame column when suspending the steel frame column.

[0002]

2. Description of the Related Art When a new steel frame column is spliced onto an existing steel frame column, it is hung by a crane and installed on the existing steel frame column. When hanging, the steel column sways,
It is difficult to install it on an existing steel column with high precision simply by instructing the operator to operate it. Also, after installation (landing), the steel columns must be held vertically by some means while welding the upper and lower columns.

For example, in the past, Japanese Patent Publication No. 53-47616.
As shown in the publication, positioning flanges having a plurality of bolt holes opened on the upper and lower sides of the steel column are integrally projected, and after the flanges are installed in a state in which the flanges substantially match each other by the hanging operation, Jig plates that serve as joints are arranged on both sides of the flange, and bolts are passed through this to temporarily hold (temporarily fix) the steel column by the tightening force of the nut from the back.

[0004]

However, in this method, the temporary fixing work also takes time, and the sling of the crane cannot be removed during the work, which hinders the transportation of other steel columns by the crane. There was a drawback.

The present invention is intended to solve the above problems, and an object of the present invention is to make the straightnesses of both of them accurately coincide with each other at the time of suspending a new steel column to an existing steel column.
In addition, the present invention provides a jig for positioning a steel frame column that can improve the operating efficiency of a crane.

[0006]

In order to achieve the above-mentioned object, the present invention has four sets of positioning frames which are arranged in such a manner as to intersect with the upper corners of a hollow existing steel frame column having a rectangular cross section by 90 °. And a plurality of guide rollers arranged on the inner surface of the upper extension of each positioning frame and rotatably in the vertical direction facing the outer side of the steel frame pillar on which the rotating surface is suspended, and each positioning frame. Is provided around the existing steel column.

Further, the fixing means may be constituted by bolts and nuts which detachably connect the positioning frames to each other with the steel frame column interposed therebetween.

Further, it is also possible to adopt a structure in which each of the positioning frames is fixed to the outer side portion of the existing steel frame column via an expansion / contraction mechanism.

[0009]

In the above construction, the jig device is arranged in advance on the upper edge of the existing steel frame column, and the suspended steel frame column is operated and guided to be roughly positioned. When the steel column is hung at the point where it abuts inside the radius of the guide roller provided on the upper extension of one of the positioning frames, the guide roller rotates and the outer part of the steel column descends and guides in the circumferential direction. To do.

Finally, the corners of the four corners are brought into contact with the peripheral surfaces of the guide rollers of all the positioning frames for positioning, and in this state, they are installed on the upper part of the existing steel column. If the bolts and nuts are used to attach and detach each positioning frame to and from the existing steel frame columns, assembly and disassembly becomes easy.

Further, when each positioning frame is attached via the expansion / contraction mechanism, it is possible to widen the allowable error range of the steel column on the suspending side during the suspending work.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a perspective view showing a positioning jig device according to a first embodiment of the present invention, and FIG. 2 is a plan view thereof.

In the figure, the steel column 1 has a rectangular cross section and is hollow inside, and the upper and lower edges of the steel column 1 are formed into a knife edge shape in order to obtain a welding margin toward the inside. A pair of temporary fixing flanges 1a are formed on the outer sides of the upper and lower portions facing each other, and the positioning jig device 2 according to the present invention is provided on the upper peripheral edge of the existing steel frame column 1. It is fixed detachably.

The jig device 2 includes four sets of positioning frames 3 arranged in a state of intersecting the upper corners of the outer side of the existing steel column 1 by 90 °, and outside the positioning frames 3 of each set. A pair of upper and lower connecting plates 4 that integrally connect the positioning frames 3 to each other, and bearings on the inner surfaces of the upper extension portions 3a of the positioning frames 3 via brackets 5, and the rotation surface thereof is the outside of the suspension side steel column 1. A pair of upper and lower guide rollers 6 which are arranged so as to be rotatable in the vertical direction so as to face the parts, bolts 7 which are inserted through the lower side of the set of positioning frames 3 which are arranged to face each side, and which are screwed into the bolts 7. With a nut 8
The respective positioning frames 3 are fixed to each other around the existing steel column 1 by the bolts 7 and nuts 8 in a tightly bound state.

The guide roller 6 can be lowered and positioned in a state where the lower edge corner portion of the steel column 1 on the suspending side is positioned inward from the radius of the guide roller 6. Therefore, the diameter of the guide roller 6 is set to a value when the operator is guided. It is set according to the allowable range of installation error.

Steel column 1 using the jig device 2 having the above structure
As for the procedure of suspending, first, the jig device 2 is installed in the existing steel column 1.
It is fixed to the upper part of the and then suspended.

As a fixing method, each positioning frame 3 is arranged on the opposite sides of the upper edge of the existing steel frame pillar 1, and then each positioning frame 3 is arranged.
By inserting the bolt 7 between them and tightening both ends of the bolt with the nut 8, the extension 3a of each positioning frame 3 is positioned in a standing state at the corner of the existing steel column 1 as shown in FIGS. Accordingly, each guide roller 6 is also attached to the upper part of the corner by 9
They are arranged at 0 ° intervals.

After the above preparatory work is completed, a new steel frame pillar 1 is suspended. This work is performed using a crane or the like, and is initially performed by the guidance work of a worker who is waiting at the corresponding position, so that the steel pillar 1 on the suspending side is located roughly above the existing steel pillar 1. After being positioned, further hanging work is performed.

At this time, as shown in FIG. 3 (a), if the lower edge corners of the suspension-side steel frame columns 1 are positioned inward from the radii of arbitrary guide rollers 6 arranged orthogonally to each other,
It can be hung while being in contact with the rotating surface of the guide roller 6.

That is, when the lower edge of the steel column 1 is located inward from the radius of the guide roller 6, the roller 6 rotates inward as the steel column 1 descends, and according to the diameter of the roller 6, the roller 6 is rotated.
As shown in (b), positioning guides to the inside, and as it descends, finally, as shown in FIG. 3 (c), the existing steel pillars 1 are accurately brought into contact with the insides of all the guide rollers 6.
It is installed in a state where the lower edge of the suspension-side steel frame pillar 1 is aligned with the upper edge of the.

After the hoisting is completed, the slings such as crane wires are removed, fixing plates (not shown) are arranged on both sides of the flanges 1a which are abutted with the other two sides of the two steel frame columns 1, and bolts (not shown) that penetrate these are provided. If both flanges 1a are connected by a nut, both steel frame pillars 1 will be temporarily fixed.

After this temporary fixing work is completed, the positioning jig 2 can be removed by loosening the nut 8 and removing the bolts 7 that tighten the space between the positioning frames 3, which is then diverted to another suspending place. It After that, welding between the steel columns 1 completes the connection work.

FIG. 3 shows a second embodiment of the present invention. In the figure, the positioning frame 20 has a truss structure structure, and a pair of upper and lower hydraulic expansion / contraction devices 21 that come into contact with the outside of the existing steel frame column 1 are arranged inside the lower part thereof, and the upper side extension part 20a of the steel frame column 1 is arranged. Hydraulic expansion device 22 inside
A guide roller 23 supported by a bearing is arranged at the tip of the plunger.

According to this structure, when the suspension side steel frame column 1 is guided to be suspended, the lower side hydraulic expansion / contraction device 21 is projected to expand the area of the upper space surrounded by each positioning frame 20, and the suspension side is extended. When the steel column 1 is hung inside this space, the telescopic device 21 is reduced to reduce the space around the steel column 1 on the suspension side, and is brought into contact with the guide roller 23 to correct the position of the existing steel frame. By descending onto the pillar 1, it can be installed with high precision as in the above-mentioned embodiment.

The joining portion of the two can be welded by using an automatic welding machine 24 or the like arranged inside the positioning frame 20.

In this embodiment, it is possible to widen the allowable error range when the steel column on the installation side is hung. Further, the flange 1a and the fixing plate can be omitted.

[0028]

As described above in detail with reference to the respective embodiments, in the jig for positioning the steel frame pillar according to the present invention, the jig device is previously arranged at the upper edge of the existing steel pillar, Guide the operation of the suspended steel column to roughly position it, and when the bottom corner contacts the inside of the radius of one of the guide rollers, suspend the steel column and the guide roller will rotate. While guiding the outer part of the steel column downward in the circumferential direction, and finally positioned by the corners of the four corners contacting the peripheral surface of all guide rollers, it is installed on top of the existing steel column in this state. Therefore, there is no need for labor for position correction as in the conventional case, and there is an advantage that the working time from the suspension of the steel column to the installation can be greatly shortened. Moreover, since the guide rollers are provided as a pair of upper and lower parts, the steel frame pillars can be self-supporting, and after the crane is positioned, the sling is immediately removed to be used for transporting other steel frame pillars, so that the moving efficiency of the crane is improved. To rise.

Further, when the jig device is attached to and detached from an existing steel frame column by attaching and detaching bolts and nuts, the structure and the operation are simple and the diversion can be easily performed.

Furthermore, when the space area surrounded by the positioning frame can be expanded or reduced by the expansion device, the allowable range of position correction by the jig device is expanded, and the hanging operation can be further facilitated, resulting in mechanization and labor saving. It is suitable in order to achieve

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which a jig device according to a first embodiment of the present invention is fixed to a steel frame column.

FIG. 2 is an isoplan view.

3 (a) to (c) are explanatory views showing an installation procedure of a steel frame column using a jig device.

FIG. 4 is an explanatory sectional view showing a state in which the jig device according to the second embodiment of the present invention is fixed to an existing steel frame column.

[Explanation of symbols]

 1 Steel column 2 Positioning jig device 3,20 Positioning frame 3a Upper extension part 6,23 Guide roller 7 Bolt 8 Nut 22 Hydraulic expansion device

Claims (3)

[Claims] 1. A set of four positioning frames arranged in a state of intersecting an upper corner portion of an outer side portion of an existing hollow steel column having a rectangular cross section by 90 °, and an inner surface of an upper extension portion of each positioning frame. And a plurality of guide rollers that are arranged rotatably and face the outer side of the suspended steel frame column so as to be rotatable in the vertical direction, and a fixing that fixes each positioning frame around the existing steel column. And a jig for positioning a steel frame column. 2. The jig device for positioning a steel frame pillar according to claim 1, wherein the fixing means is a bolt nut that detachably connects the positioning frames to each other with the steel frame pillar interposed therebetween. 3. The positioning jig device for a steel frame pillar according to claim 1, wherein each of the positioning frames is fixed to an outer side portion of the existing steel frame pillar through an expansion / contraction mechanism.