Jigs and their handling methods

Abstract

The problem is to make it possible to easily adjust the positions of a plurality of anchor bolts while maintaining the relative positions of these anchor bolts. [Solution] The jig 10 comprises a fixed plate 20 that is supported in a cantilevered manner by a formwork 72, protrudes inward from the formwork 72, and has a plurality of loose-fitting holes 22 into which a plurality of anchor bolts 90 are inserted with play, movable plates 30, 40 that are respectively stacked above and below the fixed plate 20 and have a plurality of fitting holes into which the plurality of anchor bolts 90 fit, a plurality of upper nuts 52 that are fastened to the plurality of anchor bolts 90 on the fixed plate 20, and a plurality of lower nuts 54 that are fastened to the plurality of anchor bolts 90 on the fixed plate 20. The entire circumference of the anchor bolt 90 is clear of the edge of the loose-fitting hole 22, and the upper nuts 52 and lower nuts 54 sandwich the fixed plate 20 and the movable plates 30, 40 between them.

Description

[Technical Field]

[0001] The present invention relates to a jig and a method for handling the same. [Background technology]

[0002] Patent Document 1 discloses an anchor bolt and jig set that is installed during the process of pouring concrete into a formwork to construct a reinforced concrete continuous footing. The set includes an anchor bolt assembly, a fixing plate, an upper adjustment plate, and upper and lower nuts. The set is installed as follows: The anchor bolt assembly is assembled by connecting multiple anchor bolts in a standing position with a connecting plate at their bottom. The anchor bolt assembly is placed into the formwork during or after reinforcement placement. The fixing plate, formed into an upward groove shape, is placed inside the formwork in alignment with the target anchor core, and the standing pieces on both sides of the fixing plate are placed against the inner surface of the formwork. The standing pieces have elongated holes for screwing that extend horizontally, and screws are passed through the elongated holes to temporarily fix the standing pieces to the inner surface of the formwork. The bottom plate of the fixing plate has elongated holes for anchor bolt insertion that extend in the groove width direction. The anchor bolt assembly is lifted to pass the upper ends of the anchor bolts through the elongated holes for anchor bolt insertion. Furthermore, above the fixing plate, the upper end of the anchor bolt is passed through the hole in the upper adjustment plate, and the fixing plate and upper adjustment plate are sandwiched between the upper and lower nuts screwed onto the anchor bolt. The position of the fixing plate is adjusted within the range of the elongated screw holes, and the position of the anchor bolt is adjusted within the range of the elongated anchor bolt insertion holes. A screw member is inserted into the screw hole in the standing piece, and the fixing plate is finally fixed to the formwork using the screw member. The fixing plate and upper adjustment plate are tightened with the upper and lower nuts to secure the anchor bolt to the fixing plate.

[0003] In the technology described in Patent Document 1, in order to determine the position of the anchor bolt, it is necessary not only to tighten the upper and lower nuts screwed onto the anchor bolt, but also to fully fix the standing piece of the fixing plate with a screw member, which increases the number of steps required to position the anchor bolt. In addition, the width of the fixing plate must be equal to the distance between the formwork on both sides, so if there is an error in the size of the fixing plate or in the installation position of the formwork, the fixing plate will not be firmly fixed to the formwork, the anchor bolts will not be stable, and the anchor bolts will not be positioned accurately. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-216196 Summary of the Invention [Problem to be solved by the invention]

[0005] The problem to be solved by the present invention is to make it possible to easily adjust the positions of a plurality of anchor bolts while maintaining the relative positions of these anchor bolts. [Means for solving the problem]

[0006] The following reference numerals in parentheses refer to FIGS. 1 to 6.

[0007] In order to solve the above problems, according to claim 1, a fixed plate (20) supported by a form (72) in a cantilevered manner, projecting inward from the form (72), and having a plurality of loose-fitting holes (22) into which a plurality of anchor bolts (90) are inserted with play; a movable plate (30 or 40) that is placed on or under the fixed plate (20) and has a plurality of fitting holes (32) into which the plurality of anchor bolts (90) are respectively fitted; a plurality of upper nuts (52) respectively fastened to the plurality of anchor bolts (90) on the fixing plate (20); a plurality of lower nuts (54) respectively fastened to the plurality of anchor bolts (90) below the fixing plate (20); a second movable plate that is superimposed on the fixed plate (20) on the opposite side of the movable plate (30 or 40) with respect to the fixed plate (20), and has a plurality of second fitting holes into which the plurality of anchor bolts (90) are respectively fitted; Equipped with The entire circumference of the anchor bolt (90) is spaced from the edge of the loose-fitting hole (22). 、 The upper nut (52) and the lower nut (54) sandwich the fixed plate (20), the movable plate (30 or 40), and the second movable plate (40 or 30) therebetween. A jig (10) is provided, characterized in that:

[0008] According to claim 6, there is provided a method for handling the jig (10) according to claim 1, 2 or 3, comprising: Loosen the upper nut (52) or the lower nut (54), then remove the anchor bolt. bolt (90), the movable plate (30 or 40), the upper nut (52) and the lower nut The nut (54) is translated along the fixed plate (20), and then the upper nut (52) is ) or tighten the lower nut (54) A method of handling is provided.

[0009] According to claims 1 and 6 as described above, the fixed plate (20) is supported by the formwork (72) in a cantilevered manner, so that even if there is an error in the size of the fixed plate (20) or an error in the installation position of the formwork (72), the fixed plate (20) is firmly supported by the formwork (72). As a result, the anchor bolts (90) are stabilized and can be accurately positioned. Since the entire circumference of the anchor bolt (90) is separated from the edge of the loose-fitting hole (22), when the upper nut (52) or the lower nut (54) is loosened, the position of the anchor bolt (90) can be easily adjusted in all directions perpendicular to the axial direction of the anchor bolt (90) without having to position a fixing plate as in the conventional case. Since the plurality of anchor bolts (90) are fitted into the plurality of fitting holes (32) of the movable plate (30 or 40), when the upper nuts (52) or lower nuts (54) fastened to the anchor bolts (90) are loosened, the relative positions of the anchor bolts (90) can be easily adjusted while being maintained by the movable plate (30 or 40).

[0010] According to claim 1 as described above, by employing the second movable plate in addition to the movable plate (30 or 40), the position of the anchor bolt (90) in the axial direction of the anchor bolt (90) does not shift even if either the upper nut (52) or the lower nut (54) is loosened and then tightened. Therefore, the position of the anchor bolt (90) can be easily adjusted.

[0011] According to claim 2, a backing plate (24) that is integral with the fixed plate (20), hangs down from the fixed plate (20), and is applied to the inner surface of the formwork (72); The jig (10) according to claim 1 or 2, characterized in that it comprises is provided.

[0012] According to claim 3, a fixed plate (20) supported by a form (72) in a cantilevered manner, projecting inward from the form (72), and having a plurality of loose-fitting holes (22) into which a plurality of anchor bolts (90) are inserted with play; a movable plate (30 or 40) that is placed on or under the fixed plate (20) and has a plurality of fitting holes (32) into which the plurality of anchor bolts (90) are respectively fitted; a plurality of upper nuts (52) respectively fastened to the plurality of anchor bolts (90) on the fixing plate (20); a plurality of lower nuts (54) respectively fastened to the plurality of anchor bolts (90) below the fixing plate (20); a backing plate (24) that is integral with the fixed plate (20), hangs down from the fixed plate (20), and is applied to the inner surface of the formwork (72); Equipped with The entire circumference of the anchor bolt (90) is separated from the edge of the loose-fitting hole (22), The upper nut (52) and the lower nut (54) sandwich the fixed plate (20) and the movable plate (30 or 40) therebetween. It is characterized by Ruji Ingredients (10) is provided.

[0013] The above claims 2 or claim According to the method described in claim 3, the backing plate (24) hanging down from the fixed plate (20) is placed against the inner surface of the formwork (72), thereby determining the position of the fixed plate (20) in the direction in which the fixed plate (20) protrudes inward from the formwork (72). The backing plate (24) prevents the fixed plate (20) from coming off the formwork (72) due to the load of the fixed plate (20) and the anchor bolts (90). The backing plate (24) prevents the fixed plate (20) from tilting due to the load of the fixed plate (20) and the anchor bolts (90). Therefore, the position of the anchor bolts (90) can be accurately adjusted.

[0014] According to claim 4, The fixing plate (20) is fixed to the upper end surface of the formwork (72) by being abutted against the upper end surface of the formwork (72). will be The present invention is characterized in that 2 or claim 3. A jig (10) according to claim 3 is provided.

[0015] According to claim 4, the backing plate (24) hangs down from the fixed plate (20) and contacts the inner surface of the formwork (72), and the fixed plate (20) contacts the upper end surface of the formwork (72) and is fixed to the formwork (72), thereby stabilizing the fixed plate (20) and the anchor bolt (90). Therefore, the position of the anchor bolt (90) can be accurately adjusted.

[0016] According to claim 5, a rib plate (26) that is integral with the fixed plate (20) and the backing plate (24), that is provided at the inside corner between the fixed plate (20) and the backing plate (24), that hangs down from the fixed plate (20), and that protrudes from the backing plate (24) to the inside of the formwork (72); The jig (10) according to claim 4, further comprising:

[0017] According to claim 5, the fixing plate (20) is reinforced by the rib plate (26). The rib plate (26) suppresses bending deformation of the fixing plate (20) due to the load of the fixing plate (20) and the anchor bolts (90). Therefore, the position of the anchor bolts (90) can be accurately adjusted. [Effects of the Invention]

[0018] The positions of the anchor bolts can be easily adjusted while maintaining the relative positions of the anchor bolts. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a vertical cross-section of the assembled formwork. [Figure 2] FIG. 2 is a plan view of the jig. [Figure 3] FIG. 3 is a plan view of the fixed plate. [Figure 4] FIG. 4 is a plan view of the loose-fitting hole of the fixed plate. [Figure 5] FIG. 5 is a plan view of the movable plate. [Figure 6] FIG. 6 is a plan view of a fixed plate in a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, embodiments will be described with reference to the drawings. Features and technical effects of the embodiments will be understood from the following detailed description and drawings. However, the scope of the present invention is not limited to the embodiments disclosed below. Because the drawings are provided for illustrative purposes only, the scope of the present invention is not limited to the examples in the drawings.

[0021] Fig. 1 is a drawing showing a formwork assembled in a formwork process. In Fig. 1, the illustration of reinforcing bars arranged in a reinforcing bar arrangement process is omitted.

[0022] Side formwork 71, 72 for the wall are erected parallel to each other. Side formwork 72 is higher than side formwork 71, and the upper end of side formwork 72 is positioned above the upper end of side formwork 71. Side formwork 71, 72 are used to hold back the concrete for the wall. Side formwork 72 is used to hold back not only the concrete for the wall, but also the concrete for the beams above the wall and the rising portions above them. In the example shown in Figure 1, a horizontal square bar 77 is fixed to the inner surface of the upper part of side formwork 72, but square bar 77 does not have to be provided. The beams above the wall may be circumferential beams.

[0023] A bottom formwork 73 for the beam is assembled horizontally on the upper end of the side formwork 71. The bottom formwork 73 extends from the upper end of the side formwork 71 in the opposite direction to the side formwork 72. A side formwork 74 for the beam is erected on the edge of the bottom formwork 73, parallel to the side formwork 72. The gap between the side formwork 74 and the side formwork 72 is wider than the gap between the side formwork 71 and the side formwork 72. The bottom formwork 73 and the side formwork 74 are used to hold back the concrete for the beam.

[0024] A bottom formwork 75 for the slab is laid inward from the upper end of the side formwork 74. A floating formwork 76 for the rising portion is placed parallel to the side formwork 72 at a position spaced above the side formwork 74. The floating formwork 76 is supported by supports connected to the side formwork 72 or the bottom formwork 75.

[0025] Before placing the reinforcing bars for the beams and rising portions in the area surrounded by the side formwork 72, bottom formwork 73, side formwork 74, and floating formwork 76, two anchor bolts 90 are supported on the side formwork 72 using a jig 10. By using this jig 10, the positions of the two anchor bolts 90 can be adjusted horizontally while maintaining the spacing between them. The anchor bolts 90 and the jig 10 will be described in detail below.

[0026] The end of the anchor bolt 90 penetrates the fixing plate 91, and two nuts are fastened to the anchor bolt 90 with the fixing plate 91 sandwiched between them, and the fixing plate 91 is fixed to the anchor bolt 90 by the two nuts.

[0027] The two anchor bolts 90 are assembled parallel to each other by the rectangular anti-vibration plate 60. The anti-vibration plate 60 has two fitting holes that penetrate from the top to the bottom of the anti-vibration plate 60. The two anchor bolts 90 are inserted into the fitting holes and fit together. Two nuts 66, 68 are fastened to one of the anchor bolts 90, sandwiching the anti-vibration plate 60 between them, and the anti-vibration plate 60 is fixed to the anchor bolts 90 by the nuts 66, 68. The other anchor bolt 90 is also fixed to the anti-vibration plate 60 by the two nuts 66, 68. Instead of or in addition to the nuts 66, 68, the anchor bolts 90 may be fixed to the anti-vibration plate 60 by welding, such as spot welding, arc welding, or the like.

[0028] The two anchor bolts 90 are attached to the side formwork 72 by a jig 10 and positioned therein. The jig 10 will be described in detail below with reference to Figs. 1 to 5. Fig. 2 is a plan view of the jig 10 fixed to the side formwork 72. Fig. 3 is a plan view of the fixed plate 20 of the jig 10. Fig. 4 is a plan view of the loose-fitting holes 22 formed in the fixed plate 20. Fig. 5 is a plan view of the movable plate 30 of the jig 10.

[0029] The jig 10 comprises a cantilevered fixed plate 20, a backing plate 24, a rib plate 26, an upper movable plate 30, a lower movable plate 40, two upper nuts 52 and two lower nuts 54.

[0030] The fixed plate 20, the backing plate 24, and the rib plate 26 are integrated. The fixed plate 20, the backing plate 24, and the rib plate 26 are made of steel, stainless steel, or aluminum alloy. The fixed plate 20 is rectangular. The direction parallel to the long sides of the fixed plate 20 is called the longitudinal direction, and the direction parallel to the short sides of the fixed plate 20 is called the width direction. The backing plate 24 hangs down from the underside of the fixed plate 20 perpendicular to the fixed plate 20, between one end and the other end of the fixed plate 20 in the longitudinal direction of the fixed plate 20. The width direction of the backing plate 24 is parallel to the width direction of the fixed plate 20, the thickness direction of the backing plate 24 is parallel to the longitudinal direction of the fixed plate 20, one surface of the backing plate 24 faces one end of the fixed plate 20, and the other surface of the backing plate 24 faces the other end of the fixed plate 20. The rib plate 26 is connected to the fixed plate 20 and the rib plate 26 at the inside corner between the lower surface of the fixed plate 20 and one surface of the backing plate 24, and hangs down from the lower surface of the fixed plate 20. The rib plate 26 is provided perpendicular to both the fixed plate 20 and the backing plate 24, and the thickness direction of the rib plate 26 is parallel to the width direction of the fixed plate 20 and the width direction of the backing plate 24.

[0031] The backing plate 24 is placed against the inner surface of the side form 72 and fixed to the side form 72 with fasteners such as screws or nails. The portion of the fixed plate 20 from the backing plate 24 to the other end of the fixed plate 20 is placed against the upper end surface of the side form 72 and fixed to the side form 72 with fasteners such as screws or nails. The fixed plate 20 protrudes horizontally from the edge of the upper end surface of the side form 72 toward the inside of the side form 72. The rib plate 26 protrudes from the inner surface of the side form 72 toward the inside of the side form 72. The fixed plate 20 is cantilevered, and the bending of the fixed plate 20 due to gravity is suppressed by the rib plate 26.

[0032] The fixed plate 20 has two loose-fit holes 22. These loose-fit holes 22 penetrate the fixed plate 20 from the top surface to the bottom surface. These loose-fit holes 22 are aligned in the longitudinal direction of the fixed plate 20, and a line connecting the center of one loose-fit hole 22 to the center of the other loose-fit hole 22 is parallel to the longitudinal direction of the fixed plate 20 and perpendicular to the width direction of the fixed plate 20. The loose-fit holes 22 are shaped like rounded squares, and the radii of curvature of the four rounded corners of the loose-fit holes 22 are equal to the radii of the anchor bolts 90. The distance between opposite sides of the loose-fit holes 22 is greater than the diameter of the anchor bolts 90. When the radius of the anchor bolt 90 is r [mm], the distance between opposite sides of the loose-fit holes 22 is 2a [mm], and the tolerance of the installation location of the anchor bolts 90 is expressed as n [mm], r, a, and n may satisfy the formula "a = r + n". The loose-fitting hole 22 may be formed in a circular shape instead of a square with rounded corners, and in this case, the radius of the loose-fitting hole 22 is larger than the radius of the anchor bolt 90.

[0033] The upper movable plate 30 is formed in the shape of a rectangular plate. The movable plate 30 has two fitting holes 32, which penetrate from the top surface to the bottom surface of the movable plate 30. The distance between the fitting holes 32 in the anti-vibration plate 60 is equal to the distance between the two fitting holes. The lower movable plate 40 is identical to the upper movable plate 30. Note that the upper and lower movable plates 30, 40 may be identical to the anti-vibration plate 60.

[0034] The lower movable plate 40, the fixed plate 20, and the upper movable plate 30 are stacked in this order. An anchor bolt 90 is inserted into the fitting hole of the lower movable plate 40, the loose-fitting hole 22 of the fixed plate 20, and the fitting hole 32 of the upper movable plate 30. The anchor bolt 90 fits into the fitting holes of the upper and lower movable plates 30, 40. The anchor bolt 90 is inserted into the loose-fitting hole 22 of the fixed plate 20 with some play between the anchor bolt 90 and the loose-fitting hole 22, and the entire circumference of the anchor bolt 90 is spaced from the edge of the loose-fitting hole 22 to the inside of the loose-fitting hole 22. A lower nut 54 is tightened onto the anchor bolt 90 below the lower movable plate 40, and an upper nut 52 is tightened onto the anchor bolt 90 above the upper movable plate 30. These nuts 52, 54 sandwich the movable plate 30, the fixed plate 20, and the movable plate 40. Tightening of these nuts 52, 54 secures the movable plates 30, 40 and the anchor bolt 90 to the fixed plate 20. Because the fixed plate 20 is sandwiched between the movable plates 30, 40, the anchor bolt 90 is fastened to the fixed plate 20 by the nuts 52, 54 even if part or all of the outer periphery of the nuts 52, 54 is inside the edge of the loose-fitting hole 22 when viewed in the axial direction of the anchor bolt 90. Note that one of the movable plates 30, 40 does not need to be provided. If the movable plate 30 is not provided, the nut 52 may be a flanged nut, and the movable plate 40 and the fixed plate 20 are sandwiched between the nuts 52, 54 and tightened by these nuts 52, 54. If the movable plate 40 is not provided, the nut 54 may be a flanged nut, and the movable plate 40 and the fixed plate 20 are sandwiched between the nuts 52, 54 and tightened by these nuts 52, 54.

[0035] The movable plates 30, 40 and the fixed plate 20 are spaced apart above the anti-vibration plate 60. The spacing between the two anchor bolts 90 below the anchor bolts 90 is maintained by the anti-vibration plate 60. The spacing between the two anchor bolts 90 above the anchor bolts 90 is maintained by the movable plates 30, 40. The use of the anti-vibration plate 60 in addition to the movable plates 30, 40 improves the parallelism of the two anchor bolts 90.

[0036] The method for installing the jig 10 and the anchor bolt 90 is as follows. A fixing plate 91 is attached to the bottom of the anchor bolt 90 with a nut. Similarly, a fixing plate 91 is attached to the other anchor bolt 90.

[0037] Next, two anchor bolts 90 are aligned parallel to each other and assembled to the anti-vibration plate 60. Specifically, first, a nut 66 is attached to the anchor bolt 90, and the nut 66 is turned to position the nut 66 higher than the fixing plate 91. Similarly, a nut 66 is fastened to the other anchor bolt 90. These two anchor bolts 90 are passed through two fitting holes in the anti-vibration plate 60, and the anti-vibration plate 60 is placed against the nut 66. Two nuts 68 are attached to the two anchor bolts 90, respectively, and the anti-vibration plate 60 is sandwiched between the nuts 68 and 66 by tightening the nuts 68. The fixing plate 91 may be attached to the anchor bolts 90 after the two anchor bolts 90 are attached to the anti-vibration plate 60.

[0038] After the side formwork 72 is installed, the backing plate 24 is placed against the inner surface of the side formwork 72, and the portion of the fixed plate 20 from the backing plate 24 to the other end of the fixed plate 20 is placed against the upper end surface of the side formwork 72. Fasteners such as screws or nails are driven into the backing plate 24 and the side formwork 72, and fasteners such as screws or nails are driven into the fixed plate 20 and the side formwork 72.

[0039] Next, the movable plates 30, 40 and the two anchor bolts 90 are assembled to the fixed plate 20. Specifically, first, the nut 52 is attached to the anchor bolt 90, and the nut 52 is turned to position the nut 52 above the vibration prevention plate 60. Similarly, the nut 52 is fastened to the other anchor bolt 90. After the fixed plate 20 is sandwiched between the movable plates 30, 40, the anchor bolt 90 is inserted into the fitting hole of the lower movable plate 40, the loose fitting hole 22 of the fixed plate 20, and the fitting hole 32 of the upper movable plate 30, and the nut 52 is brought into contact with the lower movable plate 40. Two nuts 54 are attached to the two anchor bolts 90, respectively, and the movable plates 30, 40 and the fixed plate 20 are sandwiched between the nuts 54 and 52 by tightening the nuts 54.。

[0040] In the above description, the anchor bolt 90 is assembled to the anti-vibration plate 60, and then the movable plates 30, 40 and the two anchor bolts 90 are assembled to the fixed plate 20. However, the anchor bolt 90 may be assembled to the anti-vibration plate 60 after the movable plates 30, 40 and the two anchor bolts 90 are assembled to the fixed plate 20.

[0041] In the above description, the fixed plate 20 and the backing plate 24 are fixed to the side formwork 72, and then the movable plates 30, 40 and the two anchor bolts 90 are assembled to the fixed plate 20. However, the fixed plate 20 and the backing plate 24 may be fixed to the side formwork 72 after the movable plates 30, 40 and the two anchor bolts 90 are assembled to the fixed plate 20.

[0042] If reinforcement work or formwork work, or both, is performed after the jig 10 and anchor bolt 90 are assembled as described above, the position of the anchor bolt 90 may become misaligned. If the position of the anchor bolt 90 becomes misaligned, handle the jig 10 as follows to adjust the position of the anchor bolt 90.

[0043] Loosen the upper nut 52 or the lower nut 53. The position of the anchor bolt 90 is adjusted by moving the two anchor bolts 90, the movable plates 30, 40, and the nuts 52, 53 in a horizontal direction parallel to the fixed plate 20. Because the entire circumference of the anchor bolt 90 is clear of the edge of the loose-fitting hole 22 before the position adjustment, the position of the anchor bolt 90 can be adjusted in all horizontal directions. Because the anti-vibration plate 60 is attached to the two anchor bolts 90, these anchor bolts 90 can be kept parallel when adjusting the position of the anchor bolts 90. After adjusting the position of the anchor bolt 90, tighten one of the nuts 52, 54 to the other. Usually, the nut 52, 54 that was loosened first is tightened, but it is also possible to tighten the nut that was not loosened.

[0044] In the above description, the formwork to which the fixed plate 20 is fixed is a side formwork that holds back the concrete of the rising portion formed on the beam. However, the formwork to which the fixed plate 20 is fixed may also be a formwork that holds back the concrete of the rising portion of a strip footing or a mat footing.

[0045] In the above description, two loose-fitting holes 22 are formed in the fixed plate 20, and two anchor bolts 90 are inserted into each of the two loose-fitting holes 22. Alternatively, as shown in FIG. 6, four loose-fitting holes 22 may be formed in the fixed plate 20, and four anchor bolts 90 may be inserted into each of the four loose-fitting holes 22. Four fitting holes are also formed in the upper movable plate 30, and four fitting holes are also formed in the lower movable plate 40. In the case of such a fixed plate 20, the location to which the fixed plate 20 is fixed may be a formwork that holds back concrete at the T-shaped intersection of the rising portions. Note that one of the loose-fitting holes 22 may not be used, and three anchor bolts 90 may be inserted into each of the three loose-fitting holes 22.

[0046] Because the fixed plate 20 is supported in a cantilevered manner by the side formwork 72, even if there is an error in the size of the fixed plate 20 or in the installation position of the side formwork 72, the fixed plate 20 is firmly supported by the side formwork 72. Therefore, the anchor bolt 90 is stabilized and the anchor bolt 90 can be positioned accurately.

[0047] Since the entire circumference of the anchor bolt 90 is separated from the edge of the loose-fitting hole 22, when the upper nut 52 or the lower nut 54 is loosened, the position of the anchor bolt 90 can be easily adjusted in all directions perpendicular to the axial direction of the anchor bolt 90 without having to position a fixing plate as in the conventional case.

[0048] Since the plurality of anchor bolts 90 are fitted into the plurality of fitting holes of the movable plates 30, 40, respectively, when the upper nuts 52 or the lower nuts 54 fastened to these anchor bolts 90 are loosened, the positions of these anchor bolts 90 can be easily adjusted while the relative positions of these anchor bolts 90 are maintained by the movable plates 30, 40.

[0049] By using two movable plates 30, 40, the position of anchor bolt 90 in the axial direction of anchor bolt 90 does not shift even if either upper nut 52 or lower nut 54 is loosened and then tightened. Therefore, the position of anchor bolt 90 can be easily adjusted.

[0050] The backing plate 24 hanging down from the fixed plate 20 is placed against the inner surface of the side formwork 72, thereby determining the position of the fixed plate 20 in the direction in which the fixed plate 20 protrudes inward from the side formwork 72. The backing plate 24 prevents the fixed plate 20 from coming off the side formwork 72 due to the load of the fixed plate 20 and anchor bolts 90. The backing plate 24 prevents the fixed plate 20 from tilting due to the load of the fixed plate 20 and anchor bolts 90. Therefore, the position of the anchor bolts 90 can be accurately adjusted.

[0051] The backing plate 24 hangs down from the fixed plate 20 and is placed against the inner surface of the side formwork 72, and the fixed plate 20 is placed against the upper end surface of the side formwork 72 and fixed to the side formwork 72, thereby stabilizing the fixed plate 20 and the anchor bolt 90. Therefore, the position of the anchor bolt 90 can be accurately adjusted.

[0052] The rib plate 26 reinforces the fixing plate 20. The rib plate 26 suppresses bending deformation of the fixing plate 20 due to the load of the fixing plate 20 and the anchor bolts 90. Therefore, the position of the anchor bolts 90 can be adjusted accurately.

[0053] Since the positions of the anchor bolts 90 are properly adjusted using the jig 10, the quality of the constructed concrete structure is good. The jig 10 contributes to preventing the need to reconstruct concrete structures. By preventing the need to reconstruct concrete structures, the jig 10 contributes to achieving the Sustainable Development Goals (SDGs).

[0054] The above-disclosed embodiments have been made for the purposes of illustration and example only, and are not intended to limit the scope of the present invention, which should be interpreted by the terms of the claims. [Explanation of symbols]

[0055] 10 Jig 20 Fixed plate 22 Free fit hole 24 Backing plate 26 Rib Board 30,40 Movable plate 32 Fitting hole 52,54 Nut 72 Side formwork

Claims

1. A fixed plate supported by a formwork in a cantilevered manner, extending inward from the formwork, and having a plurality of loose-fitting holes into which a plurality of anchor bolts are inserted with play; a movable plate that is placed above or below the fixed plate and has a plurality of fitting holes into which the plurality of anchor bolts are respectively fitted; a plurality of upper nuts respectively fastened to the plurality of anchor bolts on the fixing plate; a plurality of lower nuts respectively fastened to the plurality of anchor bolts below the fixing plate; a second movable plate that is overlapped on the fixed plate on the opposite side of the movable plate with respect to the fixed plate, the second movable plate having a plurality of second fitting holes into which the plurality of anchor bolts are respectively fitted; Equipped with The entire periphery of the anchor bolt is separated from the edge of the loose-fitting hole, The upper nut and the lower nut sandwich the fixed plate, the movable plate, and the second movable plate therebetween. A jig characterized by:

2. a backing plate that is provided integrally with the fixed plate, hangs down from the fixed plate, and is placed against the inner surface of the formwork; The jig according to claim 1 , further comprising:

3. A fixed plate supported by a formwork in a cantilevered manner, extending inward from the formwork, and having a plurality of loose fitting holes into which a plurality of anchor bolts are inserted with play; a movable plate that is placed above or below the fixed plate and has a plurality of fitting holes into which the plurality of anchor bolts are respectively fitted; a plurality of upper nuts respectively fastened to the plurality of anchor bolts on the fixing plate; a plurality of lower nuts respectively fastened to the plurality of anchor bolts below the fixing plate; a backing plate that is provided integrally with the fixed plate, hangs down from the fixed plate, and is placed against the inner surface of the formwork; Equipped with The entire periphery of the anchor bolt is separated from the edge of the loose-fitting hole, The upper nut and the lower nut sandwich the fixed plate and the movable plate therebetween. A jig characterized by:

4. The fixing plate is fixed to the formwork by being placed on the upper end surface of the formwork.

4. The jig according to claim 2 or 3.

5. a rib plate that is integral with the fixed plate and the backing plate, that is provided at the corner between the fixed plate and the backing plate, that hangs down from the fixed plate, and that protrudes from the backing plate to the inside of the formwork The jig according to claim 4, further comprising:

6. A method for handling the jig according to claim 1, 2 or 3, comprising: The upper nut or the lower nut is loosened, and then the anchor bolt, the movable plate, the upper nut, and the lower nut are moved in parallel along the fixed plate, and then the upper nut or the lower nut is tightened. A handling method characterized by the above.

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