JP2018040132A - Structure and method for fixing anchor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide anchor fixing structure and the like that enable an anchor to be fixed readily at a high accuracy, even at a location congested with reinforcing bars.SOLUTION: A frame 1 is fixed on reinforcing bars 27, 29 using an angle bar 9 and other fixing jigs, and a template 11 is installed above the frame 1 and fixed to the frame 1 using a bolt 23. Then, an anchor bolt is fitted on the template 11. The frame 1 is fixed on the reinforcing bars 27, 29 by vertically sandwiching the reinforcing bar 27 or the reinforcing bar 29 between a plate material 3 of the frame 1 and the angle bar 9, inserting a bolt 7 into a hole of the plate material 3 and the angle bar 9 and screwing a nut 8 into a tip of the bolt. Bolts 17, 23 provided on the template 11 may be used for positional adjustment of the template 11 in vertical and horizontal directions.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an anchor fixing structure and an anchor fixing method for fixing an anchor at a bar arrangement location.

  As an anchor fixing structure for accurately fixing an anchor at a bar arrangement place, there is one using an anchor fixing frame. For example, by anchoring the upper and lower ends of the anchor bolts to the upper and lower frames respectively, an anchor fixing structure with the anchor bolts and the frame is formed in advance, and after the anchor fixing structure is built and placed at a predetermined position, concrete is placed. (See Patent Documents 1 and 2).

  In Patent Document 3, the frame main body is fixed on discarded concrete, and the horizontal level of the frame main body is adjusted using an adjuster bolt, and then the anchor bolt is inserted from above to be fixed to the frame main body. It is described that a template (frame) is set to form an anchor fixing structure, and concrete is placed.

  On the other hand, Patent Document 4 describes an example of a template in which leg reinforcing bars are provided. The template is installed by welding the leg reinforcing bars to the arranged main reinforcing bars, and the upper end of the anchor bolt is attached to the template. And fixing its position is described.

Japanese Patent Laid-Open No. 2001-73458 JP-A-2015-55079 Patent No. 5620839 JP 2002-339374 A

  It is difficult to arrange the anchor fixing structure or form the anchor fixing structure as described above at a place where the bar arrangement is densely arranged, such as a joint portion of a beam, a column, or a foundation. In Patent Document 4, the anchor fixing structure is simplified by welding the leg reinforcing bars to the main body reinforcing bars, but in this case as well, it takes time and effort such as welding, and the position of the template may be slightly unstable.

  Further, even if anchor bolts are fixed by these anchor fixing structures, the position of the anchor bolts may be shifted during concrete placement, and the position accuracy of the anchor bolts may be lowered.

  The present invention has been made in view of the above-described problems, and it is an object of the present invention to provide an anchor fixing structure or the like that can fix an anchor easily and with high precision even at a location where bar arrangement is dense.

  1st invention for achieving the objective mentioned above is an anchor fixing structure for fixing an anchor to a reinforcement arrangement | positioning place, Comprising: Fixing jig for fixing the said installation frame to a reinforcement frame and a reinforcement And a template that is installed above the gantry and can be secured to the gantry, and a template for attaching the anchor.

  In the present invention, the gantry is fixed to the reinforcing bar using a fixing jig, and the anchor is fixed using the gantry and the template. Therefore, it is possible to install the mount easily and accurately even in densely arranged locations by fixing the mount to the reinforcing bar etc. at the upper end of the bar after the bar arrangement, and the anchor is easily and accurately fixed by the strong structure of the mount and the template. can do. As a result, high-quality structures can be constructed efficiently and economically, leading to reductions in work period and labor. Moreover, since the mount can be fixed to the reinforcing bar using a fixing jig, there is no need for trouble such as welding to the reinforcing bar.

The template preferably includes a horizontal position adjusting means for adjusting a horizontal position of the template. It is also desirable to have a vertical position adjusting means for adjusting the vertical position of the template.
Thus, by providing the horizontal and vertical position adjusting means as the template configuration, the position of the template with respect to the gantry can be finely adjusted, and the anchor can be fixed with high accuracy.

The fixing jig is preferably one that fixes the gantry to the reinforcing bar with the reinforcing bar sandwiched between the gantry and the fixing jig.
Thereby, a mount frame can be easily fixed to a reinforcing bar.

For example, the mount is a plate member provided with a protruding portion protruding upward from the plate member, the plate member has an opening, and the protruding portion is a cylindrical body provided so as to surround the opening. The template has an opening.
Using these openings and the internal space of the cylinder, it is possible to perform operations such as placing concrete.

It is desirable that the reinforcing bar is a reinforcing bar at the upper end of the bar arrangement.
After the bar arrangement, the frame or the like can be easily installed by fixing the frame to the reinforcing bar at the upper end of the bar arrangement.

  The second invention is an anchor fixing method for fixing an anchor to a bar arrangement location, a fixing jig is used to fix the gantry to the reinforced bar, and a template is installed above the gantry. And fixing the anchor to the frame and attaching the anchor to the template.

  ADVANTAGE OF THE INVENTION According to this invention, the anchor fixing structure etc. which can fix an anchor easily and with high precision also in the location where a bar arrangement is dense can be provided.

Example of bar arrangement at the joint between foundation beam and column The figure which shows the state which fixed the mount frame 1 to the reinforcing bars 27 and 29 The figure which shows the state which installed the template 11 above the mount frame 1 The figure which shows the state which installed the anchor bolt 31 The figure which shows the state which finished pouring concrete The figure which shows the state which fixed the mount frame 1a to the reinforcing bars 27 and 29 The figure which shows the state which installed the template 11a above the mount frame 1a. The figure which shows the state which installed the anchor bolt 31

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
First, an anchor fixing method and the like according to the first embodiment of the present invention will be described. The embodiment of the present invention will be described with reference to an example in which anchor bolts (anchors) for joining columns are fixed at a bar arrangement portion of a joint portion that joins vertical and horizontal foundation beams and columns that are main body structures.

  FIG. 1 is a view of an example of the bar arrangement at the joint portion as viewed from above, and shows only the beam main bar (hereinafter, sometimes referred to as the upper bar) at the upper end of the foundation beam. Reinforcing bars 27 in FIG. 1 are upper end bars of the foundation beam in the horizontal direction, and reinforcing bars 29 are upper end bars of the foundation beam in the vertical direction. These reinforcing bars 27 and 29 are arranged so as to intersect at the joint.

  Although not shown in particular, under these rebars 27 and 29, the reinforcing bars such as the reinforcing bar and the beam main bar at the lower end of the foundation beam are complicatedly disposed on the concrete or the like. It is difficult to fix the bolt. Even if the anchor is fixed with difficulty, the position may be shifted when the concrete is placed.

  Therefore, in this embodiment, after finishing the above-described bar arrangement at the joint portion, the gantry 1 (frame) is installed on the reinforcing bars 27 and 29 as shown in FIG. 2, and this is fixed to the reinforcing bars 27 and 29. FIG. 2A is a top view of a state in which the gantry 1 is fixed to the reinforcing bars 27 and 29, and FIG. 2B is a vertical sectional view taken along line AA in FIG. It is. The same applies to FIGS. 3 and 4 described later.

  The gantry 1 is configured by providing a cylindrical body 5 (protruding portion) on a plate material 3.

  The plane of the plate 3 is substantially rectangular and has a substantially rectangular plane opening at the center. The opening of the plate member 3 communicates with the inside of the cylindrical body 5.

  The cylinder 5 is provided so as to protrude upward from the plate member 3 in a substantially vertical direction. The plane of the cylinder 5 has a substantially square shape, and is disposed so as to surround the opening of the plate 3.

  The gantry 1 is fixed to the reinforcing bars 27 and 29 using the bolt 7, the nut 8, and the angle member 9 as a fixing jig.

  That is, the angle member 9 is disposed below the gantry 1, the reinforcing bar 27 or the reinforcing bar 29 is sandwiched between the plate member 3 and the angle member 9 of the gantry 1, and bolts are inserted into holes (not shown) of the plate member 3 and the angle member 9. 7, the base 1 is fixed to the reinforcing bars 27 and 29 by tightening the nut 8 at the tip.

  After the gantry 1 is thus attached to the reinforcing bars 27 and 29, the template 11 (frame) is installed above the gantry 1 as shown in FIG. In the present embodiment, the gantry 1, the template 11, the angle member 9 and the like constitute an anchor fixing structure 100 for fixing the anchor.

  The template 11 is for attaching anchor bolts, and is formed by providing an opening 13 and a hole 15 in a plate 12 having a substantially rectangular plane. A convex plate 21 is provided on the lower surface of the plate 12.

  The opening 13 is provided in the center of the plane of the plate 12. The planar position of the opening 13 corresponds to the opening of the plate 3 of the gantry 1 described above.

  The holes 15 are for inserting anchor bolts, and are provided at four locations around the opening 13. The planar positions of the holes 15 correspond to the four corners of the opening of the plate member 3 of the gantry 1.

  The convex plate 21 is a plate that protrudes in a substantially vertical direction below the plate member 12. For example, one surface of an angle member having a substantially L-shaped cross section is attached along the plate member 12, and the other surface protrudes below the plate member 12. Let

  The dotted lines in FIG. 3A indicate the planar position of the convex plate 21, and the convex plate 21 is provided at four locations around the opening 13. The planar position of the convex plate 21 corresponds to the outside of the cylindrical body 5 of the gantry 1 described above. That is, each convex plate 21 is provided on the outer side of the four side surfaces of the cylindrical body 5 having a substantially square-shaped plane in parallel with the side surfaces.

  In the present embodiment, the position of the template 11 is adjusted using the bolts 17 that are vertical position adjusting means provided on the template 11 and the bolts 23 that are horizontal position adjusting means.

  That is, in this embodiment, four bolts 17 serving as vertical position adjusting means pass through holes (not shown) provided at the four corners of the plate 12 of the template 11, and the upper surface of the plate 3 of the gantry 1. Are arranged in a substantially vertical direction so as to be substantially orthogonal to each other.

  These bolts 17 are screwed into nuts 19 fixed to the plate member 12, and the template 11 is mounted on the pedestal by rotating the bolts 17 with the tips of the bolts 17 being in contact with the upper surface of the plate member 3 of the pedestal 1. 1, the position of the template 11 in the vertical direction can be adjusted.

  For example, when the template 11 is placed and its plane is inclined, the bolt 17 at an appropriate location is operated (rotated) by an appropriate amount to adjust the vertical position of the template 11 so that the plane is horizontal. be able to.

  Furthermore, in this embodiment, the four bolts 23 that are horizontal position adjusting means pass through the holes 210 provided in each convex plate 21 and are substantially horizontal so as to be substantially orthogonal to the side surface of the cylindrical body 5 of the gantry 1. Arranged in the direction.

  These bolts 23 are screwed into nuts 25 fixed to the convex plate 21, and the bolts 23 are rotated and tightened in a state where the tips of the bolts 23 are in contact with the outer surface of the cylindrical body 5 of the gantry 1. Thus, the template 11 moves in the horizontal direction with respect to the gantry 1 and the position of the template 11 in the horizontal direction can be adjusted.

  For example, when the bolt 23 on the right side in FIG. 3B is tightened, the template 11 moves to the right side as indicated by an arrow a in FIG. With respect to the left bolt 23 located at the opposite position across the cylinder 5, is it necessary to leave a space between the bolt tip and the outer surface of the cylinder 5 in advance in order to enable the movement of the template 11 as described above? The right bolt 23 is rotated and tightened, and at the same time the reverse rotation is performed so that the bolt 23 is loosened.

  For example, when the template 11 is arranged, if the planar position of the hole 15 into which the anchor bolt is inserted interferes with the reinforcing bar 27 or the reinforcing bar 29, the appropriate amount of the bolt 23 is operated (rotated) by an appropriate amount to move the template 11 in the horizontal direction. Is adjusted so that the anchor bolt inserted into the hole 15 does not interfere with the reinforcing bar 27 or the reinforcing bar 29.

  After adjusting the vertical and horizontal positions of the template 11, the bolts 23 are tightened again, and the tips of these bolts 23 are pressed against the outer surface of the cylindrical body 5 of the mount 1 to fix the template 11 to the mount 1. Is possible. That is, each bolt 23 also has a role as a fixing means for fixing the template 11 to the gantry 1.

  In this way, the template 11 is installed and its position is adjusted, and the template 11 is fixed to the mount 1, and then the anchor bolt 31 is attached to the template 11 as shown in FIG. 4.

  The anchor bolt 31 is inserted into the hole 15 of the template 11 from above and is held on the template 11 using a nut 32 or the like. The anchor bolt 31 passes through the inside of the cylindrical body 5 of the gantry 1, protrudes downward from the opening of the plate member 3, and its lower end reaches below the angle member 9. If necessary, the position of the template 11 can be readjusted by the above-described method after the anchor bolt 31 is installed.

  After fixing the anchor bolts 31 in this way, the concrete is placed several times at the reinforcing bar locations. Concrete can be placed from the opening 13 of the template 11 through the inside of the cylindrical body 5 of the gantry 1 and the opening of the plate member 3. FIG. 5 is a top view of the concrete after placing.

  When placing concrete, the anchor bolt 31 may be displaced due to casting pressure or vibration. Therefore, the position of the anchor bolt 31 is appropriately checked, and the position of the template 11 is readjusted as necessary. The position of the anchor bolt 31 is adjusted. Even if the lower part of the anchor bolt 31 is buried in the concrete, the position can be adjusted if the concrete is not cured.

  As described above, according to the first embodiment, the gantry 1 is fixed to the reinforcing bars 27 and 29 using a fixing jig such as the angle member 9, and the anchor bolt 31 is fixed using the gantry 1 and the template 11. Fix it. Accordingly, by fixing the gantry 1 to the reinforcing bars 27 and 29 at the upper end after the bar arrangement, the gantry 1 can be installed easily and accurately even at a densely arranged location, and the anchor bolt is secured by the strong structure of the gantry 1 and the template 11. 31 can be fixed easily and with high accuracy. Therefore, it is possible to construct a high-quality structure efficiently and economically, and the reinforcement can be arranged without worrying about interference with the gantry 1, etc., which leads to a reduction in work period and labor. In this embodiment, the gantry 1 can be easily fixed to the rebars 27 and 29 with the rebars 27 and 29 sandwiched between the gantry 1 and the angle member 9, and there is no need for labor such as welding to the rebars 27 and 29.

  In this embodiment, the template 11 is provided with the bolts 23 as horizontal position adjusting means and the bolts 17 as vertical position adjusting means, so that the position of the template 11 with respect to the gantry 1 is finely adjusted to The bolt 31 can be fixed with high accuracy.

  In this embodiment, the gantry 1 has the plate material 3 and the cylinder 5, and the bolts 17 and 23 are rotated in a state where the tips of the bolts 17 and 23 are in contact with the upper surface of the plate material 3 and the outer surface of the cylinder 5. By doing so, the position of the template 11 with respect to the gantry 1 can be easily and quickly adjusted at the time of placing concrete.

  In addition, concrete can be placed using the opening 13 of the template 11, the opening of the plate 3 of the gantry 1, and the internal space of the cylindrical body 5.

  However, the present invention is not limited to this. For example, although the planes of the plate members 3 and 12 of the gantry 1 and the template 11 are substantially rectangular, the present invention is not limited to this. Further, the plane of the cylindrical body 5 is substantially square-shaped, but the shape is not limited to this, and is not limited to a cylindrical shape as long as it protrudes from the plate member 3. In addition, the fixing jig for fixing the gantry 1 is not limited to the one using the angle material 9 or the like, and it is sufficient that the gantry 1 can be fixed to the reinforcing bars 27 and 29.

  In addition, the bolts 17 and 23 and the nut 32 can be removed from the template 11 at an appropriate time when placing concrete, and the template 11 can be removed, and the template 11 can be reused at other construction sites. .

  Moreover, although embodiment of this invention gave and demonstrated the example which fixes an anchor in the reinforcement arrangement | positioning location of the junction part of a vertical and horizontal foundation beam and a column, the application range of this invention is not restricted to this, Various reinforcement arrangement | positioning places It is possible to use it when fixing the anchor to. In some cases, it is conceivable that after the gantry 1 is fixed to the reinforcing bars 27 and 29, another reinforcing bar is arranged on the reinforcing bars 27 and 29.

  Next, an anchor fixing method and the like according to the second embodiment of the present invention will be described. In the second embodiment, differences from the first embodiment will be mainly described, and the same configurations as those in the first embodiment will be denoted by the same reference numerals in the drawings and the description thereof will be omitted.

[Second Embodiment]
Also in the second embodiment, after finishing the bar arrangement, as shown in FIG. 6, the gantry 1a is installed on the reinforcing bars 27 and 29, and the fixing jig such as the bolt 7, the nut 8, and the angle member 9 is used. Similarly to the first embodiment, the gantry 1 a is fixed to the reinforcing bars 27 and 29. However, in the present embodiment, the plane size of the plate 3a and the cylinder 5a of the gantry 1a is slightly smaller than that of the first embodiment. 6A is a view of the state in which the gantry 1a is fixed to the reinforcing bars 27 and 29 as viewed from above, and FIG. 6B is a view in the vertical direction along the line BB in FIG. 6A. It is sectional drawing. The same applies to FIGS. 7 and 8 described later.

  Thus, after attaching the mount frame 1a to the reinforcing bars 27 and 29, the template 11a is installed above the mount frame 1a as shown in FIG. In the present embodiment, the gantry 1a, the template 11a, the angle member 9 and the like constitute an anchor fixing structure 100a for fixing the anchor.

  Similar to the template 11 of the first embodiment, the template 11a is obtained by providing an opening 13 and a hole 15 in a plate 12a having a substantially rectangular plane, and a convex plate 21 is also provided on the lower surface of the plate 12a. The arrangement of the holes 15 and the convex plates 21 is different from that of the template 11.

  That is, a plurality of holes 15 are arranged side by side along each of a pair of opposing sides of the plate member 12a. The planar position of each hole 15 corresponds to the outside of the plate material 3a of the gantry 1a.

  Moreover, as shown by the dotted line in FIG. 7A, the convex plate 21 is provided at four locations in the vicinity of the opening 13, and the planar position thereof corresponds to the inside of the cylindrical body 5 of the gantry 1a. That is, each convex plate 21 is provided on the inner side of the four side surfaces of the cylindrical body 5a having a substantially square-shaped plane in parallel with the side surfaces.

  The vertical position adjustment of the template 11a can be performed using the bolt 17 in the same manner as described above. The bolts 17 are disposed in a substantially vertical direction through holes (not shown) provided at four locations around the opening 13, and the lower ends thereof are in contact with the plate material 3a of the gantry 1a.

  The horizontal position adjustment of the template 11a can also be performed using the bolts 23 in the same manner as described above. However, in the present embodiment, the four bolts 23 are arranged on the convex plates 21 inside the cylindrical body 5a of the gantry 1a. Is disposed in a substantially horizontal direction through a hole 210 provided in the first and second holes.

  These bolts 23 are screwed into nuts 25 fixed to the convex plate 21, and the bolts 23 are rotated and tightened in a state where the tip ends of the bolts 23 are in contact with the inner surface of the cylindrical body 5 a of the gantry 1 a. Thus, the template 11a moves in the horizontal direction with respect to the gantry 1a, and the horizontal position of the template 11a can be adjusted.

  In this case, for example, when the bolt 23 on the right side of FIG. 7B is tightened, the template 11a moves to the left side as indicated by the arrow b in FIG. 7B. For the left bolt 23 at the position facing the right bolt 23, in order to enable the movement of the template 11a as described above, a space between the bolt tip and the inner surface of the cylindrical body 5 is left in advance, The right bolt 23 is rotated and tightened, and at the same time the reverse rotation is performed so that the bolt 23 is loosened.

  Each bolt 23 also has a role as a fixing means for fixing the template 11a to the gantry 1 as in the first embodiment, and after adjusting the vertical and horizontal positions of the template 11a, the bolts 23 are tightened again. The template 11a can be fixed to the gantry 1a by pressing the ends of these bolts 23 against the inner surface of the cylinder 5a of the gantry 1a. In the present embodiment, the heads of the respective bolts 23 are exposed in the openings 13, and it is possible to rotate the bolts 23 by inserting a hand or an instrument from the openings 13.

  Thus, after the template 11a is installed and its position is adjusted and the template 11a is fixed to the mount 1a, the anchor bolt 31 is attached to the template 11a as shown in FIG.

  In the present embodiment, the anchor bolt 31 is inserted into the hole 15 of the template 11a from above and held on the template 11a using a nut 32 or the like, so that the anchor bolt 31 passes through the outside of the plate 3a of the gantry 1a. Will protrude. The lower end reaches below the angle member 9 in the same manner as in the first embodiment, and thereafter the concrete is placed in the same manner as described above.

  Even in the second embodiment described above, the same effect as that of the first embodiment can be obtained, for example, the gantry 1a can be easily and accurately installed at a densely arranged location, and the anchor bolt 31 can be easily and highly accurately fixed. can get. As described above, the size of the frame and the template, the size and arrangement of the holes for passing the anchor bolts, and the like vary depending on the number of the anchor bolts, their arrangement, the size of the anchor bolts, and the state of the reinforcement. Can be determined.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

1, 1a; pedestals 3, 3a, 12, 12a; plates 5, 5a; cylinders 7, 17, 23; bolts 8, 19, 25, 32; nuts 9; angle members 11, 11a; 210; hole 21; convex plates 27 and 29; rebar 31; anchor bolt

Claims (7)

An anchor fixing structure for fixing an anchor to a bar arrangement,
A frame,
A fixing jig for fixing the gantry to the reinforced bar,
A template for attaching an anchor, which is installed above the frame and can be fixed to the frame;
An anchor fixing structure characterized by comprising:   The anchor fixing structure according to claim 1, wherein the template includes a horizontal position adjusting means for adjusting a horizontal position of the template.   3. The anchor fixing structure according to claim 1, wherein the template includes a vertical position adjusting unit for adjusting a vertical position of the template. 4.   4. The fixing jig according to claim 1, wherein the fixing jig is configured to fix the gantry to the reinforcing bar with the reinforcing bar sandwiched between the gantry and the fixing jig. 5. Anchor fixing structure. The mount is a plate material provided with a protruding portion protruding upward from the plate material,
The plate has an opening;
The protruding portion is a cylinder provided to surround the opening,
The anchor fixing structure according to any one of claims 1 to 4, wherein the template has an opening.   The anchor fixing structure according to any one of claims 1 to 5, wherein the reinforcing bar is a reinforcing bar at an upper end portion of a reinforcing bar location. An anchor fixing method for fixing an anchor at a bar arrangement location,
Using a fixing jig to fix the gantry to the rebars,
Installing the template above the frame and fixing it to the frame, and attaching an anchor to the template;
There is provided an anchor fixing method.

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