JPH1037476A - Template for anchor bolt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid any gap between an anchor bolt and an attaching hole and to prevent backlash of an anchor bolt in a direction orthogonal to the flat portion of the anchor bolt by making a plurality of slotted holes having a cross-sectional shape the same as that of the anchor bolt to be inserted. SOLUTION: Right and left shaft portions 2b, 2b of one of the U-shaped anchor bolts 2 are inserted to two corresponding slotted holes in a template 1. shaft portions 2b, 2b of another U-shaped anchor bolt 2 are inserted to the remaining slotted holes 3, 3, and then the templates 1 is fixed to the shaft, portions 2b, 2b of the U-shaped anchor bolt 2 with nuts. At this time, no gap is created between two flat portions of each shaft portion 2b and two flat portions 3c, 3c of each slotted hole 3. Thus, the template 1 and anchor bolt 2 can be fixed with a correct positional relation without deviation in right and left directions. thereby installing the anchor bolts 2 at predetermined positions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anchor bolt template fixed to an anchor bolt used for building a building.

[0002]

2. Description of the Related Art Anchor bolt templates are used to place anchor bolts in place. Further, the anchor bolt formed by the threaded bar has a cross-sectional shape including two substantially parallel flat portions and two arc portions opposing each other with the external shape of the screw formed between the ends of the flat portions. have. A conventional anchor bolt template is provided with a plurality of circular mounting holes through which the anchor bolts respectively pass.

[0003]

However, in the above-described conventional anchor bolt template, since the plurality of mounting holes are each circular, an anchor bolt formed of a threaded bar having the above-described cross-sectional shape corresponds to the template. When inserted through the circular mounting hole, a gap is created between the flat part of each anchor bolt and each mounting hole, and play occurs in the direction perpendicular to the flat part between each anchor bolt and each mounting hole. I will. Therefore, the template is fixed in a state of being shifted from the correct positional relationship with the anchor bolt, and there is a problem that the anchor bolt cannot be installed at a fixed position. The present invention has been made in view of such a conventional problem, and an object thereof is to provide an anchor bolt template in which an anchor bolt can be fixed in a correct positional relationship and an anchor bolt can be installed at a fixed position. It is to be.

[0004]

In order to achieve the above object, the invention according to claim 1 is characterized in that two substantially parallel flat portions and an external shape of a screw formed between the ends of both flat portions oppose each other. An anchor bolt template used for an anchor bolt formed of a threaded rebar having a cross-sectional shape consisting of two arc portions to be formed, the anchor bolt template has a plurality of mounting holes through which the anchor bolts are inserted, and each of the plurality of mounting holes is ,
An anchor bolt template having a long hole having substantially the same shape as the cross-sectional shape of the anchor bolt.
With this configuration, when the anchor bolts are inserted into the corresponding elongated hole-shaped mounting holes of the template, no gap is formed between each anchor bolt and each mounting hole, and there is no gap between each anchor bolt and each mounting hole. No backlash occurs in the direction orthogonal to the flat part.

According to a second aspect of the present invention, in the anchor bolt template according to the first aspect, the plurality of mounting holes are arranged such that the flat portions of the pair of mounting holes located at positions facing each other are substantially parallel. It is characterized by being arranged.

According to a third aspect of the present invention, in the anchor bolt template according to the first or second aspect, the anchor bolt is a U-shaped anchor bolt.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an anchor bolt template according to one embodiment of the present invention. This template 1 has a U-shaped anchor bolt 2 as shown in FIG.
Used to place the in place. The U-shaped anchor bolt 2 is a U-shaped threaded bar (threaded rebar) and has left and right shaft portions 2b, 2b that are curved from both ends of the bottom 2a and extend upward. Bottom 2a and left and right shafts 2
As shown in FIG. 6, b and 2b are two substantially parallel flat portions 2c and 2d and a screw 2d formed between the ends of both flat portions.
And has a cross-sectional shape composed of two arc portions 2e opposing each other. The left and right shafts 2b, 2b are each curved from the bottom 2b and extend substantially in parallel so that the distance between the shafts has a predetermined dimension. In FIG. 5, in order to simplify the illustration of the screw 2d, the screw 2d is formed around the bottom 2a of the U-shaped anchor bolt 2 and the entire left and right shafts 2b, 2b. However, it is exactly as shown in FIG.

The anchor bolt template 1 is shown in FIG.
And as shown in FIG. 2, it is a square thin metal plate. The template 1 has four mounting holes 3 through which the left and right shaft portions 2b, 2b of the U-shaped anchor bolt 2 are inserted. Each mounting hole 3 is provided at four corners of the square template 1. FIG. 1 shows a template 1 which is fixed to two U-shaped anchor bolts 2 arranged orthogonally to each other. When this template 1 is used, one shaft portion 2 of two U-shaped anchor bolts 2
b and 2b are respectively inserted into two mounting holes 3 and 3 on the diagonal line, and the shaft portions 2b and 2b of the other U-shaped anchor bolt are respectively inserted into the other two mounting holes 3 and 3 on the diagonal line. Insert it. In FIG. 5, one of the two U-shaped anchor bolts 2 to which the template 1 is fixed is not shown. Center marks 5 and 5 indicating the column center in the left and right direction are provided on the upper surface of template 1.
And center marks 6 and 6 indicating the front and rear pillar cores.

Each mounting hole 3 is formed as an elongated hole having substantially the same cross-sectional shape as the U-shaped anchor bolt 2 shown in FIG. That is, as shown in FIG.
It is formed as an elongated hole including two substantially parallel flat portions 3c and 3c and two arc portions 3d and 3d respectively connecting the ends of the flat portions. The two mounting holes 3 on the diagonal line of the four mounting holes 3 are arranged such that the flat portions 3c are parallel to each other. That is, the two mounting holes 3 and 3 on the diagonal line are the intersections of the straight line perpendicular to each flat portion 3c and passing through the midpoint thereof, the straight line connecting the center marks 5 and 5, and the straight line connecting the center marks 6 and 6. It is formed so as to form an angle of 45 degrees with a straight line passing through a certain pillar core and connecting the center marks 5 and 5.

As shown in FIGS. 2 to 4, walls 4 and 4 are provided upright at the arcs 3d and 3d of the mounting holes 3, respectively. The height of each wall 4 is the sum of the height and the thickness of the template 1 and the screw 2d of the U-shaped anchor bolt 2
It is dimensioned to be larger than the pitch.

The template 1 for a U-shaped anchor bolt having the above-described structure is mounted on two U-shaped anchor bolts 2.
At the time of assembling, the right and left shaft portions 2b, 2b of one U-shaped anchor bolt 2 are inserted into the corresponding two mounting holes 3, 3 of the template 1, and the shaft of the other U-shaped anchor bolt 2 is inserted. The parts 2b, 2b are inserted through the remaining two mounting holes 3, 3. Thereafter, the template 1 is fixed to the shafts 2b, 2b of the U-shaped anchor bolt 2 with the nut 7 (see FIG. 5). In this embodiment, since the spring washer 8 is interposed between the upper nut 7 and the template 1, the upper and lower nuts 7, 7 are prevented from loosening. The spring washers 8 are arranged outside the walls 4, 4 of each mounting hole 3.

According to the anchor bolt template 1 according to this embodiment, when the respective shaft portions 2b of the two U-shaped anchor bolts 2 are inserted into the corresponding oblong mounting holes 3 of the template 1. The two flat portions 2 of each shaft portion 2b
Since there is no gap between c and 2c and the two flat portions 3c and 3c of each mounting hole 3, a direction perpendicular to the flat portions 2c and 2c between each shaft portion 2b and each mounting hole 3, ie, No rattling of the U-shaped anchor bolt 2 occurs in the left-right direction. Therefore, the template 1 and the U-shaped anchor bolt 2 can be fixed in a correct positional relationship without any deviation in the left-right direction, and the U-shaped anchor bolt 2 can be installed at a fixed position.

In addition, according to this embodiment, since the wall portions 4 and 4 as shown in FIGS. 2 to 4 are erected at the arc portions 3d and 3d of each mounting hole 3, respectively, When each shaft portion 2b of the mold anchor bolt 2 is inserted into each mounting hole of the template 1, the wall portions 4 and 4 become circular arc portions 2 of the shaft portion 2b.
e, 2e, that is, abut on the outer periphery of the screws 2d, 2d. Therefore, the template 1 is prevented from falling into the screw grooves of the screws 2 d, 2 d by the walls 4, 4, and between the shafts 2 b and the mounting holes 3, the play of the U-shaped anchor bolt 2 in the left-right direction is prevented. Does not occur and the flat portions 2c, 2
No backlash occurs in the direction parallel to c, that is, in the front-rear direction of the U-shaped anchor bolt 2. Therefore, the template 1 can fix the U-shaped anchor bolt 2 in a correct positional relationship without displacement in the left-right and front-rear directions, and the U-shaped anchor bolt 2 can be installed at a fixed position.

The anchor bolt template according to the present invention includes not only a U-shaped anchor bolt but also two substantially parallel flat portions and a screw formed between the ends of both flat portions. The present invention is applied to all anchor bolts formed by threaded bar having a cross-sectional shape including two opposing arc portions.

[0015]

According to the present invention, when an anchor bolt is inserted into a corresponding slot-shaped mounting hole of a template, no gap is formed between each anchor bolt and each mounting hole, and each anchor bolt is not formed. There is no backlash in the direction orthogonal to the flat part between the and the mounting holes. Therefore, the anchor bolt can be fixed in a correct positional relationship without displacement, and the anchor bolt can be installed at a fixed position.

[Brief description of the drawings]

FIG. 1 is a plan view showing an anchor bolt template according to one embodiment of the present invention.

FIG. 2 is a side view of the template of FIG. 1;

FIG. 3 is an enlarged view of a part of the template of FIG. 1;

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a front view showing an assembled state of a U-shaped anchor bolt and a template.

FIG. 6 is a sectional view taken along the line BB of FIG. 5;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Anchor bolt template 2 ... U-shaped anchor bolt 2a ... Bottom 2b ... Shaft 2c ... Flat part 2d ... Screw 2e ... Arc part 3 ... Mounting hole 3c ... Flat part 3d ... Circular part 4 ... Wall part 5, 6 ... Center mark 7 ... Nut 8 ... Spring washer

Continued on the front page (72) Inventor Takashi Kitano 1-9-1, Kitahama-ku, Wakamatsu-ku, Kitakyushu-shi, Fukuoka Hitachi Metals Co., Ltd. (72) Inventor Shigeru Hirakawa 1-9-1, Kitahama-ku, Wakamatsu-ku, Kitakyushu-shi, Fukuoka No.Wakamatsu Factory, Hitachi Metals, Ltd.

Claims (3)

[Claims] 1. A screw joint rebar having a cross-sectional shape comprising two substantially parallel flat portions and two arc portions opposing each other in the outer shape of a screw formed between the ends of the flat portions. An anchor bolt template used for an anchor bolt, comprising: a plurality of mounting holes through which the anchor bolts are inserted; wherein each of the plurality of mounting holes is an elongated hole having substantially the same cross-sectional shape as the anchor bolt. An anchor bolt template, characterized in that: 2. The anchor bolt according to claim 1, wherein the plurality of mounting holes are arranged such that the flat portions of the pair of mounting holes located at positions facing each other are substantially parallel. Template. 3. An anchor bolt template according to claim 1, wherein said anchor bolt is a U-shaped anchor bolt.