JPH05141006A - Anchor frame and its fixing jig - Google Patents

Abstract

PURPOSE:To improve the assembling property of anchor frames and workability, and position respective anchor bolts firmly at the anchor frames, and cure male screw sections. CONSTITUTION:The work of anchor frames 1 is executed by using anchor bolt fixing jigs 2. The anchor frames 1 are composed of an anchor plate 3 having anchor bolt retaining devices 4 and fixing legs 5, and four anchor bolts 6, and are formed to have no top plate. The fixing legs 5 are provided with ground fixing holes for inserting hole-in anchors 21 through. The anchor bolt retaining devices 4 consist of bottom plates 4a with screw holes 8 formed on, and split-shell-shaped rise pieces 4b set vertically on the bottom plates 4a. The anchor bolt fixing jigs 2 are composed of a plurality of caps 19 for covering the respective upper ends of the respective anchor bolts 6 for composing the anchor frames 1, and a connecting frame 20 for connecting the caps 19 to each other with.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchor frame used for fixing a column base of a building and an anchor bolt fixing jig used for the construction.

[0002]

2. Description of the Related Art Conventionally, a PC steel rod has been used for an anchor bolt and a tension force has been applied to the anchor bolt.
An exposed type rigid joint column base structure is adopted in which the foundation concrete and the column base are crimped and integrated.

An anchor frame shown in FIG. 4 is used as a fixing structure for anchor bolts in such a crimping method. The anchor frame 41 includes an anchor plate 42 provided at a lower portion for sandwiching the basic concrete 40, a ceiling plate 44 also serving as a positioning member, and a PC.
It is composed of a plurality of anchor bolts 43 made of steel rods, and these three members 42 to 44 are transported in a disassembled state and assembled on site.

At the site, an angle 46 is previously embedded in the waste concrete 45 at the time of pouring. An angle 47 provided on the lower surface of the anchor plate 42 is placed on the angle 46, the anchor frame 41 is positioned, and then welded and fixed at a welded portion 48.

[0005]

According to the anchor frame 41 of this structure, since the welding portion 48 needs to be welded on site as described above, the workability at the site is poor and a thermal influence is exerted. There is a possibility that heat will be applied to the anchor bolt 41 of the PC steel rod which should not be done, and there was a high risk of strength reduction. Also, when placing the waste concrete 45,
The angle 46 must be buried, which also deteriorates the workability on site and prolongs the construction period.

Further, since the upper plate 44 is used to nut-lock the upper ends of the anchor bolts 43,
There is a problem that assembly workability is poor because there are many places where nuts are fixed. Therefore, it is considered that the top plate 44 is omitted, but if the top plate 44 is omitted, it is difficult to fix the anchor bolt 43 in the upright state and the positioning becomes difficult.

An object of the present invention is that an on-site welding is unnecessary, assembly is simple, and an angle member or the like is not buried at the time of placing waste concrete, so that the workability can be improved and the construction period can be shortened. It is to provide a frame.

It is an object of the present invention to provide an anchor frame which does not include a ceiling plate, in which the upper end of the anchor bolt can be securely fixed and easily positioned, and the male screw portion of the upper end of the anchor bolt can be cured. It is to provide a bolt fixing jig.

An object of the invention of claim 3 is to provide an anchor bolt fixing jig capable of further facilitating positioning of the anchor frame.

[0010]

In the anchor frame of the present invention, a plurality of anchor bolt holders are provided on the upper surface of the anchor plate, and fixing legs having ground fixing holes are provided on the ground plate portion on the anchor plate. Is.
The anchor bolt holding tool holds the lower end of the anchor bolt in an upright state by a rising piece.

According to a second aspect of the present invention, there is provided an anchor bolt fixing jig, wherein a plurality of caps respectively covering the upper ends of the anchor bolts constituting the anchor frame are provided, and these caps are connected to each other by a connecting frame.

According to a third aspect of the present invention, in the anchor bolt fixing jig according to the second aspect, a plumb bob is attached to four sides of the connecting frame.

[0013]

[Operation] According to the anchor frame of this structure, the anchor bolt is assembled on the anchor plate in the field, and the assembled anchor frame is placed on the concrete scrap of the ground with the fixed leg, and the hole-in anchor is fixed at the ground fixing hole of the fixed leg. Discard it and fix it on concrete. In this way, the anchor frame can be fixed without the need for on-site welding. The anchor bolt holder provided on the anchor plate prevents the anchor bolt from tilting and prevents displacement of the upper end of the anchor bolt. for that reason,
It is possible to omit the conventional top plate for fixing the upper ends of the respective anchor bolts to each other. The upper ends of the anchor bolts may be connected to each other with an appropriate jig as needed until the foundation concrete is poured.

According to the anchor bolt fixing jig of the second aspect, the caps interconnected by the connecting frame cover the upper ends of the anchor bolts to enhance the rigidity and prevent the inclination of the anchor bolts. The upper end position can be securely fixed, and positioning can be performed through this jig. Furthermore, by covering the cap, the male screw portion of the upper end of the anchor bolt can be cured, and the male screw portion of the anchor bolt can be prevented from being damaged when arranging.

According to the anchor bolt fixing jig of the third aspect, the anchor frame can be positioned with respect to the reference line on the discarded concrete by swinging down in four directions.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing a state in which an anchor bolt fixing jig 2 is set on an anchor frame 1. The anchor frame 1 is provided with anchor bolt holders 4 at four corners of the upper surface of the anchor plate 3, and a pair of fixing legs 5 and 5 is provided on the anchor plate 3, and four anchor bolt holders 4 are provided at the installation locations of the anchor bolt holders 4. The anchor bolts 6 are erected. The anchor bolt 6 is formed by processing male screw portions 6a and 6b (FIG. 2) on the upper and lower ends of a PC steel rod, and the surface thereof is provided with an unbond coating for reducing the adhesion to the basic concrete.

The anchor plate 3 is made of a thick plate such as an iron plate, has an air vent hole 7 in the center, and an insertion hole (not shown) for the anchor bolt 6 at the mounting position of each anchor bolt holder 4. Anchor bolt holder 4
Is a bottom plate 4a made of a round plate having screw holes 8
And a split tubular rising piece 4b which is erected on the bottom plate 4a and into which the anchor bolt 6 is fitted. The screw hole 8 is aligned with the anchor bolt insertion hole of the anchor plate 3 and welded to the anchor plate 3. To be done. Anchor bolt 6
Screw the male screw portion 6b at the lower end into the screw hole 8 of the anchor bolt holder 4 to project it to the lower surface of the anchor plate 3, and screw the PC washer 10 together with the round washer 9 (FIG. 2) to the projecting portion. It is erected on the anchor plate 3 by tightening.

Each fixed leg 5 is a pair of vertical leg members 1 made of angle members welded to adjacent corners of the anchor plate 3.
1, 11 and a grounding member 12 mounted across both vertical leg members 11, 11. The grounding member 12 is made of an angle material, and the grounding plate portion 12a is made of its lateral flange.
, A plurality of ground fixing holes 13 (Fig. 2) are provided.
The grounding member 12 is attached to the vertical leg member 11 by a height adjusting bolt 16 which is inserted through a vertically elongated hole 14 provided in the vertical leg member 11 and a through hole 15 of the grounding member 12. Adjustable. Reference numerals 17 and 18 denote washers and nuts used for the height adjusting bolt 16, respectively.

The anchor bolt fixing jig 2 includes four caps 19 each of which is a cylinder with a lid and covers the upper ends of the anchor bolts 6 of the anchor frame 1, and these caps 1.
And a cross-shaped connecting frame 20 in which 9 are connected to each other. The cap 19 and the connecting frame 20 are fixed by welding or the like.

Next, the construction method will be described. The anchor frame 1 includes anchor plates 3 and 4 as shown in FIG.
The anchor bolt 6 (only one is shown in FIG. 2) and the two grounding members 12, which are the constituent members of the fixed leg 5, are disassembled and transported to the site. At the site, the members 3, 6, 12 of the anchor frame 1 are assembled and the anchor bolt fixing jig 2 is attached.

After this assembly, the anchor frame 1 is positioned on the waste concrete of the ground, and the anchor frame 1 is installed in the ground fixing hole 13 of the fixing leg 12 by the hole-in anchor 21 (FIG. 1). The hole-in anchor 21 is inserted into a hole provided in abandoned concrete and partly spreads and is fixed in the hole by pulling operation from above. A sleeve type or the like formed in the above is used. The hole-in anchor 21 may be a self-piercing type one that is inserted while making a hole. After the anchor frame 1 is installed, the reinforcement of the foundation is performed, and the foundation concrete is poured to a predetermined level near the upper end of the anchor bolt 6. After curing, the base plate (not shown) of the column base is tightened and fixed to each anchor bolt 6.

The anchor frame 1 can be installed on the ground without performing the on-site welding in this way.
Therefore, there is no fear that the anchor bolt 6 made of a PC steel rod is deteriorated by welding heat and the tensile strength is lowered, and stable construction quality can be obtained. In addition, on-site workability is also improved. Moreover, the hole can be fixed to the ground by the hole fixing anchor 21 in the ground fixing hole 13 of the fixed leg 5, and it is not necessary to previously bury an angle member or the like for fixing the anchor frame in the waste concrete unlike the conventional case. Therefore, workability on site is further improved. Further, since the height of the fixed leg 5 can be freely adjusted by the height adjusting bolt 16 and the long hole 14, the anchor bolt 6 can be easily leveled.

Further, in this anchor frame 1, instead of the conventional top plate 44 (FIG. 4), an anchor bolt fixing jig 2 is used to prevent the anchor bolt 6 from tilting and to position it. Since the bolt fixing jig 2 is attached only by covering the anchor bolts 6 with the caps 19, the assembly of the anchor frame 1 in the field is easier than in the conventional method in which the ceiling plate is fixed with nuts. Moreover, since the male screw portion 6a at the upper end of the anchor bolt 6 is cured by the cap 19 of the anchor bolt fixing jig 2, it is possible to prevent the male screw portion 6 from being damaged during bar arrangement. As described above, the anchor frame 1 is easily assembled and the anchor frame 1 is easily installed on the ground, so that the construction period can be shortened and the construction cost can be reduced.

Since the anchor bolt fixing jig 2 simply covers the anchor bolt 6 with the cap 19, the reliability of fixing the anchor bolt 6 is lower than that of the conventional one in which the ceiling plate is fixed with a nut. However, since the anchor bolts 6 are held upright by the rising pieces 4b of the anchor bolt holder 4, it is possible to prevent the anchor bolts 6 from being reliably fixed. In the anchor frame 1 in the above-mentioned embodiment, the anchor bolt 6
Although the PC steel rod was used for the above, a deformed steel rod used for a reinforcing bar or the like may be used.

FIG. 3 shows a modification of the anchor bolt fixing jig. In this anchor bolt fixing jig 22, a connecting frame 23 connecting the caps 19 has a rectangular frame shape,
An arm 24 is projectingly provided on four sides of the connecting frame 23, and a plumbing 25 is attached to the tip thereof. Plumb bob 2
In No. 5, the thread portion 25a is attached to the attachment portion 26 formed of a slit formed at the tip of the arm 24. Cap 19
Is the same as that of the above embodiment.

In this structure, the anchor frame 1 can be positioned as follows. That is, the position of the anchor frame 1 is adjusted such that each plumb bob 25 hung from the anchor bolt fixing jig 22 matches the reference lines La and Lb pre-inked on the discarded concrete.
In this way, the anchor bolt fixing jig 22 can also be used as a positioning jig, and since the plumb bob 25 is attached to the anchor bolt fixing jig 22, it is not necessary for the operator to support, so that the positioning work is easy. You can do it. Moreover, since the anchor frame 1 can be positioned in four directions at the same time, the positioning work can be performed more easily.

[0027]

According to the anchor frame of the present invention, since the anchor leg having the ground fixing hole is provided on the anchor plate,
Since it can be directly fixed to the ground by using a hole-in anchor, there is no need for on-site welding, and there is no need to bury an angle or the like beforehand in waste concrete or the like, improving on-site workability. Further, since the anchor plate is provided with the anchor bolt holder that holds the anchor bolt in the upright state by the rising piece, it is not necessary to provide the top plate, and the assembly of the anchor frame is simplified. As a result, the construction period is shortened and the construction cost is reduced.

In the anchor bolt fixing jig according to the second aspect of the present invention, since the caps covering the upper ends of the anchor bolts are connected to each other by the connecting frame, the anchor bolts are prevented from tilting in the anchor frame without the top plate. It is possible to achieve reliable positioning. Further, the cap allows the male screw portion at the upper end of the anchor bolt to be cured, so that the male screw portion of the anchor bolt can be prevented from being damaged when the reinforcement is arranged.

The anchor bolt fixing jig of claim 3 is 4
Since the plumb bob was provided on the one side, the operator did not have to support the plumb bob when positioning the anchor frame with respect to the reference line stamped on the discarded concrete,
Positioning work can be easily performed by one worker. Moreover, 4
One can be positioned at the same time.

[Brief description of drawings]

FIG. 1 is a perspective view of an assembled state showing a relationship between an anchor frame and an anchor bolt fixing jig according to an embodiment of the present invention.

FIG. 2 is a perspective view of the anchor frame and an anchor bolt fixing jig in an exploded state.

FIG. 3 is a perspective view of an assembled state showing a relationship between a modified example of an anchor bolt fixing jig and an anchor frame.

FIG. 4 is a front view of a conventional example.

[Explanation of symbols]

1 ... anchor frame, 2 ... anchor bolt fixing jig,
3 ... Anchor plate, 4 ... Anchor bolt holder, 4
a ... bottom plate, 4b ... rising piece, 5 ... fixed leg, 6 ... anchor bolt, 8 ... screw hole, 12a ... ground plate part, 13 ... ground fixing hole, 19 ... cap, 20 ... connecting frame, 21 ... hole-in anchor , 22 ... Anchor bolt fixing jig, 25
... plumb bob

Claims (3)

[Claims] 1. An anchor plate, a plurality of anchor bolt holders each fixed to an upper surface of the anchor plate and holding a lower portion of the anchor bolt in an upright state by a rising piece, and the anchor bolt holders held by the anchor bolt holders. An anchor frame provided with a plurality of anchor bolts standing on an anchor plate and a plurality of fixing legs provided on the anchor plate and having ground fixing holes in a ground plate portion. 2. An anchor bolt fixing jig comprising a plurality of caps respectively covering the upper ends of the anchor bolts constituting the anchor frame, and a connecting frame connecting the caps to each other. 3. An anchor bolt fixing jig according to claim 2, wherein plumb bobs are attached to four sides of the connecting frame.