Jigs and their handling methods

Abstract

The challenge is to be able to easily adjust the positions of multiple anchor bolts while maintaining their relative positions. [Solution] The jig 10 comprises a fixed plate 20 supported by the formwork 72 in a cantilevered manner, protruding inward from the formwork 72 and having multiple loose fitting holes 22 into which multiple anchor bolts 90 are inserted with some play; movable plates 30 and 40 superimposed on the fixed plate 20 and below it, respectively, and having multiple fitting holes into which multiple anchor bolts 90 are fitted; multiple upper nuts 52 that are tightened onto the multiple anchor bolts 90 on the fixed plate 20, and multiple lower nuts 54 that are tightened onto the multiple anchor bolts 90 below the fixed plate 20. The entire circumference of the anchor bolts 90 is away from the edges of the loose fitting holes 22, and the upper nuts 52 and lower nuts 54 sandwich the fixed plate 20 and the movable plates 30 and 40 between them.

Description

【Technical Field】 【0001】 The present invention relates to a jig and a handling method thereof. 【Background Art】 【0002】 Patent Document 1 discloses an anchor bolt jig set installed in the process of placing concrete in a formwork to construct a reinforced concrete fabric foundation. The set includes an anchor bolt assembly, a fixing plate, an upper adjustment plate, and upper and lower nuts. The installation method of the set is as follows. An anchor bolt assembly is assembled by connecting a plurality of upright anchor bolts to each other at the lower part with a connecting plate. The anchor bolt assembly is placed into the formwork during or after steel bar placement. A fixing plate formed in an upward groove shape is arranged inside the formwork in accordance with the target anchor core, and the standing pieces on both sides of the fixing plate are applied to the inner surface of the formwork. In the standing pieces, long holes for screwing are formed in the horizontal direction, and a screw member is passed through the long holes for screwing to temporarily fix the standing pieces to the inner surface of the formwork with the screw member. In the bottom plate part of the fixing plate, long holes for inserting the anchor bolt are formed extending in the groove width direction, and the upper end of the anchor bolt is passed through the long holes for inserting the anchor bolt by lifting the anchor bolt assembly. Further, above the fixing plate, the upper end of the anchor bolt is passed through the hole of the upper adjustment plate, and the fixing plate and the 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 long holes for screwing, and the position of the anchor bolt is adjusted within the range of the long holes for inserting the anchor bolt. A screw member is passed through the screw holes for screwing in the standing pieces, and the fixing plate is fixedly attached to the formwork with the screw member. The anchor bolt is fixed to the fixing plate by tightening the upper and lower nuts to clamp the fixing plate and the upper adjustment 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 permanently fix the upright portion of the fixing plate with a threaded member. This increases the number of steps required for positioning the anchor bolt. Furthermore, the width of the fixing plate must be equal to the distance between the formwork on both sides. Therefore, if there is an error in the size of the fixing plate or an error in the installation position of the formwork, the fixing plate will not be securely fixed to the formwork, the anchor bolts will not be stable, and the positioning of the anchor bolts will not be accurate. [Prior art documents] [Patent Documents] 【0004】 [Patent Document 1] Japanese Patent Publication No. 2010-216196 [Overview of the Initiative] [Problems that the invention aims to solve] 【0005】 The problem that this invention aims to solve is to enable easy adjustment of the positions of multiple anchor bolts while maintaining their relative positions. [Means for solving the problem] 【0006】 The reference numerals in parentheses below are referenced in Figures 1 to 6. 【0007】 To solve the above problems, according to claim 1, A fixing plate (20) is supported by the formwork (72) in a cantilevered manner, protruding inward from the formwork (72), and having multiple loose fitting holes (22) into which multiple anchor bolts (90) are inserted with some play, A movable plate (30 or 40) is placed on top of or below the fixed plate (20) and has a plurality of fitting holes (32) into which the plurality of anchor bolts (90) are each fitted, On the fixing plate (20), there are a plurality of upper nuts (52) that are fastened to the plurality of anchor bolts (90), Below the fixing plate (20), there are a plurality of lower nuts (54) that are tightened to the plurality of anchor bolts (90), 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 fixing plate (20) and the movable plate (30 or 40) between them. A jig (10) characterized by the above is provided. 【0008】 According to claim 2, A second movable plate 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 each fitted. Equipped with, The upper nut (52) and the lower nut (54) sandwich the fixing plate (20), the movable plate (30 or 40), and the second movable plate (40 or 30) between them. The jig (10) described in feature 1 is provided. 【0009】 According to claim 6, a method for handling the jig (10) described in claim 1 or 2, Loosen the upper nut (52) or the lower nut (54), then move the anchor bolt (90), the movable plate (30 or 40), the upper nut (52) or the lower nut (54) parallel to the fixed plate (20), and then tighten the upper nut (52) or the lower nut (54). A handling method characterized by the above is provided. 【0010】 According to claims 1, 2, and 6 described above, since the fixing plate (20) is supported by the formwork (72) in a cantilevered manner, the fixing plate (20) is firmly supported by the formwork (72) even if there is an error in the size of the fixing plate (20) or an error in the installation position of the formwork (72). As a result, the anchor bolts (90) are stable and their positioning can be accurately performed. Since the entire circumference of the anchor bolt (90) is away 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 adjust the position of the fixing plate as in the conventional method. Since multiple anchor bolts (90) fit into multiple fitting holes (32) of the movable plate (30 or 40), when the upper nuts (52) or lower nuts (54) tightened on these anchor bolts (90) are loosened, the positions of these anchor bolts (90) can be easily adjusted while their relative positions are maintained by the movable plate (30 or 40). 【0011】 According to claim 2 as described above, by employing a second movable plate in addition to the movable plate (30 or 40), the position of the anchor bolt (90) in the axial direction will not shift regardless of whether the upper nut (52) or the lower nut (54) is loosened or tightened. Therefore, the position of the anchor bolt (90) can be easily adjusted. 【0012】 According to claim 3, A backing plate (24) is provided integrally with the fixing plate (20), hangs down from the fixing plate (20), and is applied to the inner surface of the formwork (72). The jig (10) according to claim 1 or 2, characterized by comprising It will be provided. 【0013】 According to Claim 3 as described above, the contact plate (24) hanging down from the fixed plate (20) is applied to 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 inside the formwork (72). The contact plate (24) prevents the fixed plate (20) from coming off the formwork (72) due to the loads of the fixed plate (20) and the anchor bolt (90). The contact plate (24) suppresses the inclination of the fixed plate (20) due to the loads of the fixed plate (20) and the anchor bolt (90). Therefore, the position of the anchor bolt (90) can be accurately adjusted. 【0014】 According to Claim 4, the fixed plate (20) is applied to the upper end surface of the formwork (72) and fixed to the formwork (72) A jig (10) according to Claim 3, characterized in that, is provided. 【0015】 According to Claim 4 as described above, while the contact plate (24) hangs down from the fixed plate (20) and is applied to the inner surface of the formwork (72), the fixed plate (20) is applied to the upper end surface of the formwork (72) and fixed to the formwork (72), so that the fixed plate (20) and the anchor bolt (90) are stabilized. Therefore, the position of the anchor bolt (90) can be accurately adjusted. 【0016】 According to Claim 5, a rib plate (26) provided integrally with the fixed plate (20) and the contact plate (24), provided at the inner corner between the fixed plate (20) and the contact plate (24), hanging down from the fixed plate (20), and protruding from the contact plate (24) to the inside of the formwork (72) A jig (10) according to Claim 4, characterized in that, is provided. 【0017】 According to Claim 5 as described above, the fixed plate (20) is reinforced by the rib plate (26). The rib plate (26) suppresses the bending deformation of the fixed plate (20) due to the loads of the fixed plate (20) and the anchor bolt (90). Therefore, the position of the anchor bolt (90) can be accurately adjusted. 【Advantages of the Invention】 【0018】 The positions of these anchor bolts can be easily adjusted while maintaining the relative positions of the plurality of anchor bolts. 【Brief Description of the Drawings】 【0019】 [Figure 1] FIG. 1 is a vertical sectional view of an assembled formwork. [Figure 2] FIG. 2 is a plan view of a jig. [Figure 3] FIG. 3 is a plan view of a fixing plate. [Figure 4] FIG. 4 is a plan view of a clearance fit hole of the fixing plate. [Figure 5] FIG. 5 is a plan view of a movable plate. [Figure 6] FIG. 6 is a plan view of a fixing plate in a modified example. 【Mode for Carrying Out the Invention】 【0020】 Hereinafter, embodiments will be described with reference to the drawings. The 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. Since the drawings are provided for illustrative purposes only, the scope of the present invention is not limited to the illustrations in the drawings. 【0021】 FIG. 1 is a drawing showing a formwork assembled by a formwork assembling process. In FIG. 1, the illustration of the reinforcing bars arranged by the reinforcing bar arranging process is omitted. 【0022】 Side formwork 71 and 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 above the upper end of side formwork 71. Side formwork 71 and 72 are for holding back the concrete of the wall. Side formwork 72 is for holding back not only the concrete of the wall, but also the concrete of the beams above the wall and the rising section 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 the square bar 77 does not have to be provided. The beams above the wall may be lintel beams. 【0023】 The 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 toward the opposite side of the side formwork 72. The side formwork 74 for the beam is erected on the edge of the bottom formwork 73 parallel to the side formwork 72. The distance between the side formwork 74 and the side formwork 72 is wider than the distance between the side formwork 71 and the side formwork 72. The bottom formwork 73 and the side formwork 74 are for holding back the concrete of the beam. 【0024】 The bottom formwork 75 for the slab is laid inward from the upper end of the side formwork 74. The floating formwork 76 for the rising section is positioned parallel to the side formwork 72 at a location 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 sections in the area enclosed 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. Using this jig 10, the positions of the two anchor bolts 90 can be adjusted horizontally while maintaining the distance 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 anchoring plate 91, and two nuts are tightened around the anchoring plate 91 and attached to the anchor bolt 90, so that the anchoring plate 91 is fixed to the anchor bolt 90 by the two nuts. 【0027】 Two anchor bolts 90 are assembled parallel to each other by a rectangular bracing plate 60. The bracing plate 60 has two fitting holes that penetrate from the top surface to the bottom surface of the bracing plate 60. The two anchor bolts 90 are inserted into these fitting holes and fitted together. Two nuts 66 and 68 are tightened around one of the anchor bolts 90, sandwiching the bracing plate 60, and the bracing plate 60 is fixed to the anchor bolt 90 by the nuts 66 and 68. The other anchor bolt 90 is also fixed to the bracing plate 60 by the two nuts 66 and 68. Instead of, or in addition to, the nuts 66 and 68, the anchor bolts 90 may be fixed to the bracing plate 60 by welding such as tack welding, spot welding, or arc welding. 【0028】 The two anchor bolts 90 are attached to the side formwork 72 by the jig 10 and positioned accordingly. The jig 10 will be described in detail below with reference to Figures 1 to 5. Figure 2 is a plan view of the jig 10 fixed to the side formwork 72. Figure 3 is a plan view of the fixing plate 20 of the jig 10. Figure 4 is a plan view of the loose fitting hole 22 formed in the fixing plate 20. Figure 5 is a plan view of the movable plate 30 of the jig 10. 【0029】 The jig 10 comprises a cantilevered fixing plate 20, a backing plate 24, a rib plate 26, an upper movable plate 30, a lower movable plate 40, an upper nut 52 and a lower nut 54. 【0030】 The fixing plate 20, the backing plate 24, and the rib plate 26 are integrated. The fixing plate 20, the backing plate 24, and the rib plate 26 are made of steel, stainless steel, or aluminum alloy. The fixing plate 20 is shaped like a rectangular plate. The direction parallel to the long side of the fixing plate 20 is called the longitudinal direction, and the direction parallel to the short side of the fixing plate 20 is called the width direction. The backing plate 24 hangs perpendicularly from the bottom surface of the fixing plate 20 between one end and the other end of the fixing plate 20 in the longitudinal direction of the fixing plate 20. The width direction of the backing plate 24 is parallel to the width direction of the fixing plate 20, the thickness direction of the backing plate 24 is parallel to the longitudinal direction of the fixing plate 20, one surface of the backing plate 24 faces one end of the fixing plate 20, and the other surface of the backing plate 24 faces the other end of the fixing plate 20. The rib plate 26 is connected to the fixing plate 20 and the rib plate 26 at the inner corner between the lower surface of the fixing plate 20 and one surface of the backing plate 24, and hangs down from the lower surface of the fixing plate 20. The rib plate 26 is provided perpendicular to both the fixing plate 20 and the backing plate 24, and the thickness direction of the rib plate 26 is parallel to the width direction of the fixing 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 formwork 72 and fixed to the side formwork 72 with fasteners such as screws or nails. The portion of the fixing plate 20 from the backing plate 24 to the other end of the fixing plate 20 is placed against the upper end surface of the side formwork 72 and fixed to the side formwork 72 with fasteners such as screws or nails. The fixing plate 20 protrudes horizontally from the edge of the upper end surface of the side formwork 72 toward the inside of the side formwork 72. The rib plate 26 protrudes from the inner surface of the side formwork 72 toward the inside of the side formwork 72. The fixing plate 20 is cantilevered, and bending of the fixing plate 20 due to gravity is suppressed by the rib plate 26. 【0032】 The fixing plate 20 has two loose fitting holes 22. These loose fitting holes 22 penetrate from the top surface to the bottom surface of the fixing plate 20. These loose fitting holes 22 are aligned in the longitudinal direction of the fixing plate 20, and the line connecting the center of one loose fitting hole 22 to the center of the other loose fitting hole 22 is parallel to the longitudinal direction of the fixing plate 20 and perpendicular to the width direction of the fixing plate 20. The loose fitting holes 22 are shaped like rounded squares, and the radius of curvature of the four rounded corners of the loose fitting holes 22 is equal to the radius of the anchor bolt 90. The distance between opposite sides of the loose fitting holes 22 is greater than the diameter of the anchor bolt 90. If the radius of the anchor bolt 90 is r [mm], the distance between opposite sides of the loose fitting holes 22 is 2a [mm], and the allowable error of the installation location of the anchor bolt 90 is expressed as n [mm], then r, a, and n may satisfy the formula "a = r + n". Furthermore, the loose fitting hole 22 may be shaped like a circle instead of a rounded square, 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 shaped like 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 of the bracing 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 and 40 may also be identical to the bracing plate 60. 【0034】 The lower movable plate 40, the fixed plate 20, and the upper movable plate 30 are stacked in that 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 and 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 separated from the edge of the loose fitting hole 22 and inside the loose fitting hole 22. The lower nut 54 is tightened on the anchor bolt 90 under the lower movable plate 40, and the upper nut 52 is tightened on the anchor bolt 90 on the upper movable plate 30. These nuts 52 and 54 sandwich the movable plate 30, the fixed plate 20, and the movable plate 40. The tightening of these nuts 52 and 54 secures the movable plates 30 and 40 and the anchor bolts 90 to the fixed plate 20. Because the fixed plate 20 is sandwiched between the movable plates 30 and 40, the anchor bolts 90 are secured to the fixed plate 20 by the nuts 52 and 54 even if part or all of the outer circumference of the nuts 52 and 54 is inside the edge of the loose fitting hole 22 when viewed in the axial direction of the anchor bolts 90. Note that either the movable plates 30 or 40 may be omitted. 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 and 54 and tightened by these nuts 52 and 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 and 54 and tightened by these nuts 52 and 54. 【0035】 The movable plates 30, 40 and the fixed plate 20 are separated above the bracing plate 60. Below the anchor bolts 90, the distance between the two anchor bolts 90 is maintained by the bracing plate 60. Above the anchor bolts 90, the distance between the two anchor bolts 90 is maintained by the movable plates 30, 40. Because the bracing plate 60 is used in addition to the movable plates 30, 40, the parallelism of the two anchor bolts 90 is improved. 【0036】 The installation method for the jig 10 and anchor bolts 90 is as follows. The anchoring plate 91 is attached to the bottom of the anchor bolt 90 using a nut. Similarly, the anchoring plate 91 is attached to the other anchor bolt 90. 【0037】 Next, the two anchor bolts 90 are assembled to the bracing plate 60 parallel to each other. Specifically, first, a nut 66 is attached to the anchor bolt 90, and the nut 66 is rotated to position it above the anchoring plate 91. Similarly, a nut 66 is attached to the other anchor bolt 90. These two anchor bolts 90 are passed through the two fitting holes in the bracing plate 60, and the bracing plate 60 is brought into contact with the nuts 66. Two nuts 68 are attached to the two anchor bolts 90 respectively, and the bracing plate 60 is sandwiched between the nuts 68 and 66 by tightening the nuts 68. The anchoring plate 91 may be attached to the anchor bolts 90 after the two anchor bolts 90 have been assembled to the bracing 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 fixing plate 20 from the backing plate 24 to the other end of the fixing plate 20 is placed against the upper 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 fixing plate 20 and the side formwork 72. 【0039】 Next, the movable plates 30 and 40 and the two anchor bolts 90 are assembled to the fixed plate 20. Specifically, first, a nut 52 is attached to the anchor bolt 90, and the nut 52 is rotated to position it above the bracing plate 60. Similarly, a nut 52 is attached to the other anchor bolt 90. After sandwiching the fixed plate 20 between the movable plates 30 and 40, the anchor bolts 90 are inserted into the fitting holes of the lower movable plate 40, the loose fitting holes 22 of the fixed plate 20, and the fitting holes 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 nuts 54 are tightened to sandwich the movable plates 30 and 40 and the fixed plate 20 between the nuts 54 and nut 52. When assembling the movable plates 30 and 40 and the two anchor bolts 90 to the fixed plate 20 as described above, the central axis of the anchor bolt 90 is positioned in the loose fitting hole 【0040】 In the above description, the anchor bolts 90 are assembled to the bracing plate 60, and then the movable plates 30, 40 and the two anchor bolts 90 are assembled to the fixed plate 20. Alternatively, the movable plates 30, 40 and the two anchor bolts 90 may be assembled to the fixed plate 20, and then the anchor bolts 90 may be assembled to the bracing plate 60. 【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. Alternatively, the movable plates 30, 40 and the two anchor bolts 90 may be assembled to the fixed plate 20, and then the fixed plate 20 and the backing plate 24 may be fixed to the side formwork 72. 【0042】 As described above, if reinforcement work, formwork assembly work, or both are performed after the jig 10 and anchor bolt 90 have been assembled, the position of the anchor bolt 90 may shift. If the position of the anchor bolt 90 shifts, adjust the position of the anchor bolt 90 by handling the jig 10 as follows. 【0043】 Loosen the upper nut 52 or the lower nut 53. Adjust the position of the anchor bolts 90 by moving the two anchor bolts 90, the movable plates 30 and 40, and the nuts 52 and 53 horizontally along the fixed plate 20. Since the entire circumference of the anchor bolts 90 is away from the edge of the loose fitting hole 22 before position adjustment, the position of the anchor bolts 90 can be adjusted in all horizontal directions. Since the bracing plate 60 is assembled to the two anchor bolts 90, these anchor bolts 90 can be kept parallel when adjusting their position. After adjusting the position of the anchor bolts 90, tighten one of the nuts 52 and 54 onto the other. Normally, the nut that was loosened first is tightened, but the one that was not loosened may also be tightened. 【0044】 In the above description, the formwork to which the fixing plate 20 is fixed is a side formwork that dams up the concrete of the rising section formed on the beam. In contrast, the formwork to which the fixing plate 20 is fixed may also be a formwork that dams up the concrete of the rising section of a strip foundation or a raft foundation. 【0045】 In the above description, two loose fitting holes 22 are formed in the fixing plate 20, and two anchor bolts 90 are inserted into the two loose fitting holes 22, respectively. In contrast, as shown in Figure 6, four loose fitting holes 22 may be formed in the fixing plate 20, and four anchor bolts 90 may be inserted into the four loose fitting holes 22, respectively. 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 fixing plate 20, the location to which the fixing plate 20 is fixed may be a formwork that holds back concrete at the part where the rising sections intersect in a T-shape. Alternatively, one of the loose fitting holes 22 may not be used, and three anchor bolts 90 may be inserted into the three loose fitting holes 22, respectively. 【0046】 Since the fixing plate 20 is supported by the side formwork 72 in a cantilevered manner, even if there is an error in the size of the fixing plate 20 or an error in the installation position of the side formwork 72, the fixing plate 20 will be firmly supported by the side formwork 72. As a result, the anchor bolts 90 will be stable and their positioning will be accurate. 【0047】 Since the entire circumference of the anchor bolt 90 is away 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 adjust the position of the fixing plate as in the conventional method. 【0048】 Since multiple anchor bolts 90 fit into multiple fitting holes in the movable plates 30 and 40, when the upper nut 52 or lower nut 54 tightened on these anchor bolts 90 is loosened, the positions of these anchor bolts 90 can be easily adjusted while their relative positions are maintained by the movable plates 30 and 40. 【0049】 By employing two movable plates 30 and 40, the position of the anchor bolt 90 in the axial direction will not shift regardless of whether the upper nut 52 or the lower nut 54 is loosened or tightened. Therefore, the position of the anchor bolt 90 can be easily adjusted. 【0050】 The support plate 24, which hangs down from the fixing plate 20, is pressed against the inner surface of the side formwork 72, thereby determining the position of the fixing plate 20 in the direction in which it protrudes inward from the side formwork 72. The support plate 24 prevents the fixing plate 20 from coming off the side formwork 72 due to the load of the fixing plate 20 and the anchor bolts 90. The support plate 24 also prevents the fixing plate 20 from tilting due to the load of the fixing plate 20 and the anchor bolts 90. Therefore, the position of the anchor bolts 90 can be precisely adjusted. 【0051】 The backing plate 24 hangs down from the fixing plate 20 and is pressed against the inner surface of the side formwork 72, and the fixing plate 20 is pressed against the upper end surface of the side formwork 72 and fixed to the side formwork 72, thereby stabilizing the fixing plate 20 and the anchor bolts 90. Therefore, the position of the anchor bolts 90 can be precisely 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 precisely adjusted. 【0053】 The position of the anchor bolts 90 is properly adjusted using the jig 10, resulting in high-quality concrete structures. This jig 10 contributes to preventing the need to redo concrete structures. Through preventing the need to redo concrete structures, this jig 10 contributes to achieving the Sustainable Development Goals (SDGs). 【0054】 The embodiments disclosed herein are for illustrative purposes only and are not intended to limit the scope of the invention. The scope of the invention should be interpreted by the terms of the claims. [Explanation of symbols] 【0055】 10 jigs 20 Fixed plate 22 Free fit hole 24 backing plate 26 Rib Plate 30,40 Movable plate 32 Fitting holes 52, 54 nuts 72 Side formwork

Claims

[Claim 1] A fixing plate supported by the formwork in a cantilevered manner, protruding inward from the formwork, and having multiple loose fitting holes into which multiple anchor bolts are inserted with some play, A movable plate is placed on or below the aforementioned fixed plate and has multiple fitting holes into which the multiple anchor bolts are each fitted, On the fixing plate, a plurality of upper nuts are fastened to each of the plurality of anchor bolts, Below the fixing plate, there are a number of lower nuts that are each tightened to the number of anchor bolts, Equipped with, The entire circumference of the anchor bolt is separated from the edge of the loose fitting hole. The upper nut and the lower nut sandwich the fixing plate and the movable plate between them. A jig characterized by the following features. [Claim 2] A second movable plate is superimposed on the fixed plate on the opposite side of the movable plate, and has a plurality of second fitting holes into which the plurality of anchor bolts are each fitted. Equipped with, The upper nut and the lower nut sandwich the fixing plate, the movable plate, and the second movable plate between them. The jig according to claim 1. [Claim 3] A backing plate provided integrally with the fixing plate, hanging down from the fixing plate, and making contact with the inner surface of the formwork. The jig according to claim 1 or 2, characterized by comprising: [Claim 4] The fixing plate is placed against the upper end surface of the formwork and fixed to the formwork. The jig according to claim 3. [Claim 5] Rib plate provided integrally with the fixing plate and the backing plate, located in the inner corner between the fixing plate and the backing plate, hanging down from the fixing plate and protruding inward from the backing plate into the formwork The jig according to claim 4, characterized by comprising the features. [Claim 6] A method for handling the jig described in claim 1 or 2, Loosen the upper nut or the lower nut, then move the anchor bolt, the movable plate, the upper nut or the lower nut parallel to the fixed plate, and then tighten the upper nut or the lower nut. A handling method characterized by the following.

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