JPH0525897A - Fixing support column for structure - Google Patents

Abstract

PURPOSE:To shorten term of works and to improve work efficiency by eliminating all of preceeding stages of execution of work from burying of a base plate to welding and fixing of a core material, and to make accuracy in positioning of a support column easily obtainable while providing the column with surpassing pull-out strength. CONSTITUTION:In erection of a support column 10 that is made by fitting its column root 11 into a fixing hole 31 bored in foundation concrete 30, four bolt receiving parts 12 with tapping applied to the inside thereof are provided beforehand to the column root 11 so that each two of the four bolt receiving parts are made to face different column centers C1 and C2, and centerlines of the bolt receiving parts cross each other at right angles as seen on the plane view. Bolts 40 for fixing the support column, tipped with shafts 43 that cut into the internal surface of the fixing hole, are screwed down to the bolt receiving parts. Then the column root 11, prepared as mentioned above, is placed in the fixing hole 31 and tightening is applied to the fixing bolts 40. The column root 11 is then held film from the four quarters with the fixing bolts 40 as the shafts 43 on the front end of the bolts cut into the internal surface of the fixing hole 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for fixing pillars for supporting structures such as balconies, fences, and handrails in corridors which are built inside and outside of reinforcing bars, steel concrete buildings, apartment houses and the like.

[0002]

2. Description of the Related Art A conventional method for fixing a structure supporting strut is, as shown in FIG. 5, when the foundation concrete 1 is placed, as a pre-process, the anchor 3 is preliminarily aligned with the mounting position of the strut 2. Attached base plate 4
Embedded in the base plate 4 exposed at the bottom of the mounting hole 5 that has been punched out, and the core material 7 fixed to the vertically adjusted column 2 is welded and fixed via the attachment plate 6 during the installation work. After that, a method of finally filling the mounting hole 5 with mortar is adopted.

[0003]

However, according to the above-mentioned conventional fixing method, the following various problems have occurred. First, since the core material 7 is fixed to the base plate 4 by welding, if flammable material is left nearby, it may catch fire and cause a fire.
Secondly, in order to embed the base plate 4 in the previous step, it is indispensable to expose and position the spots, and even if these are performed, the embedding depth and the embedding position will vary. To adjust this variation, the fixing position of the core material 7 is changed or the vertical position of the column 2 is changed, so that the working efficiency is extremely deteriorated. Thirdly, if the embedding position is so different that the position of the base plate 4 cannot be adjusted, the base plate 4 is re-inserted at a different position and the chipping or re-filling work is separately performed. Will be needed. Fourthly, not only a specialized skilled worker is required for the embedding of the base plate 4, its position adjustment, chip refilling work, welding work, etc., and these works are also performed separately according to the procedure. As a result, the construction period required to fix the support column 2 becomes long.

The present invention solves all of the problems of the above-mentioned conventional strut fixing method, shortens the construction period and improves work efficiency by eliminating the need for any pre-process work from embedding the base plate to welding. The main purpose of the present invention is to provide a method of fixing a pillar that can fix the pillar in a short time even if it is not a construction worker, can easily obtain the positional accuracy of the pillar, and is excellent in pull-out strength.

[0005]

[Means for Solving the Problems] According to the method of the present invention for solving the above problems, a pillar for supporting a structure is erected at a pillar root portion to be embedded in a mounting hole formed in a cast concrete foundation. Before fixing, provide four bolt receivers on the pillar root side with female screws that face each other in pairs toward two different pillar centers and have center lines at right angles to the pillar centers in plan view. , Arranging the pillar root portion in the mounting hole with a fixing bolt having an inner wall digging shaft whose tip bites into the inner wall by tightening and turning the mounting hole toward the inner wall Then, while securing the positional accuracy of the support, the fixing bolt is tightened to fix the support in the mounting hole.

[0006]

The method of the present invention will be described below with reference to the illustrated embodiments. 1 and 2, in the method of the present invention, a supporting column for supporting a structure is a cylindrical supporting column 10, and a fixing structure applied when fixing the column to a mounting hole 31 formed in a cast concrete 30. An example is shown. Cylindrical support 10
The four nut supports 12 as bolt receivers are attached to the cylindrical column root part 11 which is the site to be embedded in the cylindrical column root part 11 through the mounting holes 13, respectively. The nut sert 12 is internally threaded on the distal end side of the inner surface of the cylinder, and has a proximal end formed with a detachment preventing flange 14 that is seated around the mounting hole 13 on the outer periphery of the cylindrical column 10. Of these nutserts 12, one of the opposing ones has its center line directed to the column center C1 of the cylindrical column 10, and the other of the opposing ones has its center line directed to the column center C2 whose vertical position is different from that of the column center C1. Further, these center lines are arranged so as to maintain a right-angled relationship with the column centers C1 and C2 in a plan view (see FIG. 2). Nutsert 12
The distance between the column centers C1 and C2, which is the reference for the arrangement of, can be set arbitrarily in relation to the embedding depth of the cylindrical column root portion 11.

Each nut sert 12 has a fixing bolt 4
0 is screwed. The fixing bolt 40 supports the cylindrical column 10 with the mounting hole 31 and fixes the cylindrical column 10 in the mounting hole 31, and includes a male screw portion 41 and a square head portion 42 that are screwed into the female screw of the nut insert 12. Further, the inner wall biting shaft 43 is formed so as to coaxially project at the tip of the square head 42 and can be bited into the inner wall of the mounting hole 31. In the case of this fixing bolt 40, the tip of the inner wall biting shaft 43 approaches the inner wall of the mounting hole 31, and the turning in the direction of biting into this is the tightening turning direction, and the tip is in the direction away from the inner wall. The rotation is loose and the rotation direction. The tip of the inner wall biting shaft 43 is preferably hollowed in a hemispherical concave shape or a conical concave shape in order to make it easier to bite into the inner wall and to increase the upward tensile strength.

Fixing of the cylindrical column 10 in the mounting hole 31 using the above fixing structure is performed as follows. First, the nutserts 12 are mounted in advance in the mounting holes 13 at the above-mentioned four places of the cylindrical column root portion 11 of the cylindrical column 10. This mounting is performed at the manufacturing site or the mounting site of the cylindrical column 10. Next, the fixing bolt 40 is screwed into each of the nutserts 12 and rotated in the loosening direction to loosen them. In this state, the cylindrical column root portion 11 is inserted into the mounting hole 31, and the fixing bolts 40 are rotated in the tightening direction while adjusting the height level of the cylindrical column 10 and the positions of the front, rear, left, and right. At this time, each fixing bolt 4
By performing the turning adjustment of 0, the positional accuracy of the cylindrical column 10 can be accurately and easily obtained. Cylindrical support 1
When the positioning accuracy of 0 is obtained, when the fixing bolt 40 is further rotated in the tightening direction, the concave-shaped tip of the inner wall feeding shaft 43 bites into the inner wall of the mounting hole 31 to form a cylindrical strut. Acts as a 10-key. The fixing bolt 40 has a cylindrical position in which the columnar center (C1, C2) is different between the one facing the other and the other, so that the cylindrical column 10
Firmly support from all sides. At this time, in the nut sert 12, the base cylinder portion of which the female thread is not cut is pressed and deformed in the outer peripheral direction by the turning in the tightening direction, and the cylindrical pillar root portion 11
It is crimped to the inner surface and firmly fixed to it. Then, when the fastening of all the four fixing bolts 40 is completed, the fixing bolts 40 at the four places can be integrated to fix the cylindrical column 10 in the mounting hole 31. Finally, if the quick-drying mortar 32 is filled in the mounting hole 31,
Completely attach the cylindrical support 10 to the mounting hole 31 in a short working time.
And it can be securely fixed. In the fixed cylindrical column 10, the tip of the inner wall feeding shaft 43 of the fixing bolt 40 bites into the inner wall of the mounting hole 31 to a considerable extent, so that it can sufficiently withstand a tensile load. In addition, the previous process like the conventional fixing method, that is, the embedding of the base plate 4,
Since all the work of welding the core material 7 through the attachment plate 6 and positioning the core material 7 is unnecessary, it is possible to shorten the working process.

FIG. 3 and FIG. 4 show an example of a fixing structure applied when fixing the rectangular cylindrical support 20 to the mounting hole 31. Bolt insertion holes 22 are formed in the center of the four sides of the square cylindrical columnar root portion 21, which is the site where the square cylindrical pillar 20 is to be embedded. The center line of one of the bolt insertion holes 22 facing each other is directed to the column center C1 of the rectangular columnar column 20, and the other of the bolt insertion holes 22 whose column center lines are different in vertical position from the column center C1. It is placed facing C2. Therefore, when seen in a plan view, as shown in FIG. 4, the respective center lines maintain a right angle relationship with the column centers C1 and C2. Reinforcing members 23 are fitted inside the square columnar root portions 21, and female threaded bolt receiving holes 24 are respectively provided on the four surfaces of the reinforcing members 23 at positions corresponding to the bolt insertion holes 22.
Are integrally formed. Then, the fixing bolt 4 described above
0 is screwed into the bolt receiving hole 24. The structure of the fixing bolt 40 conforms to the previous embodiment.

The fixing of the rectangular cylindrical support 20 to the mounting hole 31 is
Do the following: First, the reinforcing member 23 is fitted inside the square columnar root portion 21, and the bolt receiving hole 24 and the bolt insertion hole 2 are inserted.
After combining the two, each of the fixing bolts 40,
The bolt insertion hole 22 is screwed into the bolt receiving hole 24 and rotated in the loosening direction to loosen it. Reinforcing material 2 in this state
After arranging the square cylindrical columnar root 21 containing 3 in the mounting hole 31 and obtaining the positional accuracy of the rectangular cylindrical column 20, the fixing bolts 40 are respectively rotated in the tightening direction, whereby the inner wall feeding shaft Four
3 works as in the previous embodiment. At this time, the four surfaces of the square columnar root portion 21 try to bend inward by the tightening pressure of the fixing bolt 40, but the reinforcing material 23 prevents this bending.
Subsequent actions and effects of the fixing bolt 40 are the same as those in the previous embodiment, and detailed description thereof will be omitted. Then, if the mounting holes 31 of the thus-fixed rectangular tubular support 20 are filled with the quick-drying mortar 32, the rectangular tubular support 20 will be attached to the mounting hole 3.
It is completely fixed in 1 within a short time.

[0011]

As described above, according to the method of the present invention, bolt receivers are provided in advance at predetermined four positions of the column base of the column, and the bolt receivers are provided with the inner wall digging shaft. After arranging the pillar root part in the mounting hole in the state where it is screwed, by simply tightening the fixing bolts sequentially while maintaining the positional accuracy of the pillar, the tip of the inner wall feeding shaft of this fixing bolt It digs into the inner wall, and the fixing bolt itself firmly supports and fixes the column from all sides. Therefore, it is possible to shorten the construction period by eliminating the need for pre-process work from the embedding of the base plate to welding, which is required in the conventional fixing method, and to improve work efficiency. The position accuracy of the support can be easily obtained. Further, since the support shaft is supported in a state where the inner wall digging shaft of the fixing bolt digs into the mounting hole, the pulling load can be sufficiently endured.

[0012]

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a fixing structure of a cylindrical column for realizing the method of the present invention and a fixing state thereof.

2 is a cross-sectional view of FIG.

FIG. 3 is a vertical cross-sectional view showing a fixing structure of a rectangular columnar strut for realizing the method of the present invention and a fixing state thereof.

4 is a cross-sectional view of FIG.

FIG. 5 is a vertical cross-sectional view of a strut fixing structure showing a conventional strut fixing method and a fixing state thereof.

[Explanation of symbols]

10 Cylindrical support 11 Cylindrical pillar root 12 Nutsert 13 mounting holes 20 square column 21 Square tube post 22 Bolt insertion hole 23 Reinforcement material 30 cast concrete 31 mounting holes 32 quick-drying mortar 40 fixing bolt 43 Inner wall biting shaft C1, C2 pillar core

Claims (5)

[Claims] 1. When vertically mounting and fixing a support pillar for supporting a structure in a mounting hole formed in a cast concrete foundation at a pillar root portion which is a planned site for embedding, two different pillar cores are previously provided on the pillar root portion side. Provide four bolt receivers with female threads that face each other in pairs and whose center lines are at right angles to the pillar center in plan view.Tighten each bolt receiver toward the inner wall of the mounting hole. The pillar root portion is arranged in the mounting hole in a state in which the fixing bolt having the inner wall biting shaft whose tip bites into the inner wall by rotation is screwed, and the fixing bolt is tightened while the positional accuracy of the pillar is being shown. A method for fixing a structure supporting pillar, comprising fixing the pillar to a mounting hole. 2. The bolt receiver, when the column is a cylindrical column,
It consists of a nut sert attached to the root of a cylindrical column,
The method for fixing a structure supporting strut according to claim 1, wherein the nut support is fixed by crimping the base cylindrical portion to the inner surface side of the cylindrical pillar root portion by pressing by rotating the fixing bolt in the tightening direction. 3. The bolt receiver, when the column is a rectangular column column,
2. A fixing bolt integrally formed with a reinforcing member fitted in a square columnar root portion, and a fixing bolt is screwed through a bolt insertion hole formed in the column root portion at a position corresponding to the bolt receiver. The method for fixing the structure support pillar according to [4]. 4. The method for fixing a structure supporting strut according to claim 1, wherein the tip of the inner wall digging shaft of the fixing bolt is hollowed into a hemispherical concave shape or a conical concave shape. 5. The mounting hole is filled with quick-drying mortar after the support column is fixed in the mounting hole with a fixing bolt.
The method for fixing the structure support pillar according to [4].