JP2981691B2 - Joint method and joint structure of box-shaped column in steel frame construction - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint method and a joint structure capable of performing a simple and easy operation when joining a box-shaped column at the time of steel frame construction.

[0002]

2. Description of the Related Art Conventionally, a box-shaped cross-section column is usually used in a steel-framed multi-story building, but in the case where the upper and lower box-shaped cross-section columns (hereinafter referred to as an upper column and a lower column) are joined up and down in the construction. 4 and 5, temporary bolt holes 23 are provided at four positions on the lower peripheral surface of the upper column 21 and the upper peripheral surface of the lower column 22, respectively.
Are attached by welding, the elongated pieces 24 are sandwiched from both sides by sandwiching plates 26, and temporary bolts 25 are inserted into the elongated pieces 24 and tightened so as to be in proper positions. Is welded 27, and after the welding is completed, the temporary bolt 25
And the strip 24 was cut and removed.

[0003]

In the above-mentioned conventional construction method, bolts are clamped from both sides of a strip for temporary bolts with clamping plates, and welded to the lower end of the upper column and the upper end of the lower column. It is necessary to cut and remove the strips that have been welded after the upper and lower columns have been welded, and work to abut the holding plate from both sides in addition to welding to join the upper and lower columns There is a lot of loosening work on site that requires temporary bolting work and cutting and removing strips (in addition, when welding strips on site, welding strips). In addition to the need for specialized work, there is a drawback that the work is complicated by the work, which is complicated by the work and is an obstacle to shortening the process.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned drawbacks and makes it possible to easily and reliably join the upper and lower pillars at the time of erecting, without requiring any special work, and without being affected by the weather. It is an object to obtain a joint method and a joint structure.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to (1) the lower end of an upper box-shaped cross-section column from above a prism provided with a friction plate at the upper end of a lower box-shaped cross-section column. After loosely inserting the vacant space in the upper section and aligning the joint surfaces of the upper and lower box-shaped columns with the adjustment bolts provided at the lower end of the upper box-shaped section, Method of connecting a box-shaped column with a mortar filled between the mortar and the column (2) A cavity is provided at the lower end and an adjustment bolt is screwed in, and an injection hole communicating with the cavity is formed. In the space of the provided upper box-shaped column, the prism of the lower box-shaped column in which the friction plate is attached to the upper end of the prism provided in the support plate at the upper end is loosely inserted, and the space and It consists of a joint structure of a box-shaped column at the time of steel frame construction filled with mortar between the prism and the mortar It is intended to take the stage.

[0006]

An embodiment of the present invention will be described with reference to the drawings. In FIG. 1 to FIG. 3, an adjusting bolt 4 for matching the joint surfaces of the upper column 1 and the lower box-shaped column (lower column) 3 is provided at the lower end 2 of the upper box-shaped column (upper column) 1. It is screwed into the outer peripheral surface at right angles from the four circumferential directions. An injection hole 5 is provided above the outer surface, and a lid plate 6 is attached above the injection hole 5 to form a cavity.

A support plate 8 is attached to the upper end 7 of the lower column 3, and a prism 9 having an outer periphery slightly smaller than the outer periphery of the lower column 3 long enough to support the upper column 1 is welded onto the support plate 8. ing. By bringing the tip of the adjusting bolt 4 into contact with the prism 9, it is possible to adjust the joint surfaces of the upper pillar 1 and the lower pillar 3 via the prism 9 so as to match. Prism 9
Is closed by a closing plate 10, and a band-shaped friction plate 11 such as a striped steel plate is fixed near the upper end.
Note that the leg 11 a of the friction plate 11 may be fixed to the inside of the upper column 1 so that a frictional resistance is generated between the center of the leg 11 a and the prism 9. The friction plate 11 has a function of opposing the pulling force of the upper column 1 by frictional resistance and supporting the upper column 1 from the inside so as to maintain the vertical state of the upper column 1 when the upper column 1 is suspended from above the lower column 3. It is.

[0008] A joint method for a box-shaped column according to the present invention will be described. To join the upper column 1 and the lower column 3, when the lower end 2 of the upper column 1 is loosely inserted from above the prism 9 of the lower column 3, the inner wall of the upper column 1 is connected to the friction plate 11 near the upper end of the prism 9. After being guided and lowered while maintaining the vertical state, the lowering of the support plate 8 is prevented. Then, after adjusting the four adjusting bolts 4 so that the joint surfaces coincide with each other so that the outer peripheral surfaces of the upper column 1 and the lower column 3 coincide, the non-shrinkage cement, the flow agent, and the fine aggregate are injected through the injection hole 5. No shrink mortar 12
Is filled between the inside of the upper pillar 1 and the prism 9 so that the upper pillar 1 and the lower pillar 3 are integrally joined in the vertical direction.

[0009]

According to the first aspect of the present invention, when joining the upper column and the lower column in the conventional steel frame construction, a strip for temporary bolts is welded to the outer wall of the column near the joint, and the holding plate is held from both sides. Since there is no need to tighten the bolts, there is no need to perform strip welding work, temporary bolt tightening work of the holding plate, and cutting work of the strips at the site, and gently insert the lower part of the upper column into the upper prism of the lower column and fill the injection hole. Since there is no welding work just by filling the non-shrink mortar from above, there is no need for welding specialty, and it is not affected by the weather. In addition, the joint structure for performing this joint work can be performed in a factory, so that it is extremely effective in shortening the work process as compared with the conventional method of on-site work. The second aspect of the invention has the same effects as the first aspect of the invention, and also has a very simple structure and a reliable operation.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a joint structure according to the present invention;
It is a vertical front view.

FIG. 2 is a cross-sectional plan view taken along line AA of FIG.

FIG. 3 is a cross-sectional plan view taken along the line BB of FIG. 1;

FIG. 4 is a front view showing a joint portion between an upper column and a lower column in a conventional example.

FIG. 5 is a plan view of the same.

[Description of Signs] 1 Upper Box-Shaped Column (Upper Column) 2 Lower End 3 Lower Box-Shaped Column (Lower Column) 4 Adjusting Bolt 5 Injection Hole 7 Upper End 8 Support Plate 9 Square Column 11 Friction Plate 12 Mortar

Claims (2)

(57) [Claims] 1. A lower end (2) of an upper box-shaped column (1) from above a prism (9) provided with a friction plate (11) on an upper end (7) of a lower box-shaped column (3). The upper box-shaped column (1) and the lower box-shaped column (3) are inserted by adjusting bolts (4) provided at the lower end (2) of the upper box-shaped column (1).
Joint method of a box-shaped column in a steel frame construction, in which a mortar (12) is filled between a cavity of an upper box-shaped column (1) and a prism (9) after matching the joint surfaces of . 2. An upper box-shaped column (1) having a lower end (2) provided with a cavity and an adjusting bolt (4) screwed therein and provided with an injection hole (5) communicating with the cavity. In the vacant space, a prism (9) of a lower box-shaped column (3) having a friction plate (11) attached to the upper end of a prism (9) provided on a support plate (8) of an upper end (7) is provided. A joint structure of a box-shaped section column at the time of steel frame construction, which is loosely inserted and filled with mortar (12) between the empty space and the prism (9).