Pre-installation assembly type anchor bolt fixing device

Abstract

In a pre-installation, pre-assembled anchor bolt fixing device, the height of each anchor bolt can be adjusted while preventing the formation of unfilled spaces inside. [Solution] The pre-installation assembly type anchor bolt fixing device (10) comprises a plurality of anchor bolts (11), a frame (22) that connects and fixes the plurality of anchor bolts in parallel, a plurality of legs (31) fixed to the plurality of anchor bolts in each axial direction and extending linearly in each axial direction, and a plurality of adjustment parts (40) connected to the plurality of legs and having protruding parts (43) that protrude from each leg on the opposite side of each anchor bolt in each axial direction, and the position of each protruding part relative to each leg in each axial direction is adjustable, and the portion of the adjustment parts that is not in contact with other members is open.

Description

Technical Field

[0001] The present invention relates to a pre-installation assembly type anchor bolt fixing device that is assembled before installation of an anchor bolt fixing device including an anchor bolt and then installed on site.

Background Art

[0002] There is a known construction method in which an anchor bolt fixing device including an anchor bolt is assembled before installation, and the height of each anchor bolt is adjusted at the site, and then the anchor bolt fixing device is fixed to the disposable concrete. For example, the pre-installation assembly type anchor bolt fixing device described in Patent Document 1 includes a leg portion that supports the anchor bolt vertically downward, a long nut connected to the lower end portion of the leg portion, and an adjustment bolt connected to the lower end portion of the long nut. The height of the anchor bolt is adjusted by rotating the adjustment bolt.

[0003] In addition, on site, a rectangular frame lower frame is fixed to the disposable concrete, legs are fixed to the four corners of the frame lower frame, and a site assembly type anchor bolt fixing device for vertically fixing an anchor bolt to the upper part of the legs is disclosed in Patent Documents 2 to 4, respectively.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, foundation concrete is poured around the anchor bolt fixing device that is fixed to the lean concrete. After the foundation concrete is poured, it is undesirable for a space to be formed inside the anchor bolt fixing device that is not filled with material or concrete. In the anchor bolt fixing device described in Patent Document 1, it is unavoidable that a space not filled with concrete will be formed inside the long nut.

[0006] The present invention was made to solve the above problems, and its main objective is to make it possible to adjust the height of each anchor bolt in a pre-installation assembly type anchor bolt fixing device, while suppressing the formation of a space inside that is not filled with concrete. [Means for solving the problem]

[0007] The first aspect of this invention is defined as follows: Multiple anchor bolts, The frame, which is fixed by connecting the aforementioned multiple anchor bolts in parallel, Multiple legs are fixed to each of the multiple anchor bolts in the axial direction of each of the multiple anchor bolts and extend linearly in the axial direction of each of the multiple anchor bolts, A plurality of adjustment units, each connected to the plurality of legs, having a projection that protrudes from each leg on the opposite side of each anchor bolt in each axial direction, wherein the position of each projection relative to each leg in each axial direction is adjustable, and the portion of each adjustment unit that is not in contact with other members is open, A pre-installation, pre-assembly type anchor bolt fixing device equipped with the following features.

[0008] According to the first-phase device defined in this way, multiple anchor bolts can be connected and fixed in parallel by a frame. Generally, reinforcing bars are not placed directly below the anchor bolts. Therefore, if each leg extends linearly in the direction of each axis, interference between the legs and the reinforcing bars placed in the foundation can be suppressed when installing the anchor bolt fixing device. In addition, since multiple legs are fixed to each of the multiple anchor bolts, there is no need to adjust the relative positions of the heavy anchor bolts and legs on site.

[0009] Multiple adjustment units are connected to the multiple leg units, and each has a protruding portion that extends beyond the leg unit on the opposite side of the anchor bolt in each axial direction. Therefore, the height of each anchor bolt can be adjusted on-site by adjusting the position of each protruding portion relative to each leg unit in each axial direction. Subsequently, by fixing each protruding portion of each adjustment unit to the fixed part, the entire anchor bolt fixing device assembled before installation can be fixed to the fixed part.

[0010] When pouring foundation concrete around the anchor bolt fixing device, concrete is poured around the device. In this process, the parts of the multiple adjustment sections that are not in contact with other members are left open. Therefore, the parts of the multiple adjustment sections that are not in contact with other members can be filled with the poured concrete. Consequently, the formation of spaces that are not filled with concrete inside the multiple adjustment sections can be suppressed. Furthermore, since spaces are less likely to form in the parts of the multiple adjustment sections that are in contact with other members, the formation of spaces that are not filled with concrete in those parts is suppressed.

[0011] The second aspect of this invention is defined as follows: Multiple anchor bolts, The frame, which is fixed by connecting the aforementioned multiple anchor bolts in parallel, Multiple legs are fixed to each of the multiple anchor bolts in the axial direction of each of the multiple anchor bolts and extend linearly in the axial direction of each of the multiple anchor bolts, A plurality of adjustment units, each connected to the plurality of legs, having a protruding portion that extends beyond the leg on the opposite side of the anchor bolt in each axial direction, wherein the position of each protruding portion relative to the leg in each axial direction is adjustable, and the plurality of adjustment units do not have a closed space formed inside, A pre-installation, pre-assembly type anchor bolt fixing device equipped with the following features.

[0012] According to the second-phase apparatus defined in this way, since no closed space is formed inside the multiple adjustment parts, it is possible to suppress the formation of spaces not filled with concrete inside the multiple adjustment parts.

[0013] A third aspect of this invention is defined as follows: In the apparatus of the first or second aspect, the plurality of anchor bolts are each fixed to the frame by a plurality of fixing members, and in each axial direction, the portion of the anchor bolt fixing device on the side of the frame to each protruding part is contained within the range obtained by projecting the plurality of anchor bolts and the plurality of fixing members in each axial direction.

[0014] According to the third-phase device defined in this way, multiple anchor bolts can be fixed to the frame by multiple fixing members. Furthermore, in each axial direction, the portion of the anchor bolt fixing device on the side of the frame to each protruding part is contained within the range obtained by projecting the multiple anchor bolts and the multiple fixing members in each axial direction. Therefore, when installing the anchor bolt fixing device, interference between the device, which includes multiple legs and multiple adjustment parts, and the reinforcing bars placed in the foundation can be suppressed.

[0015] The fourth aspect of this invention is defined as follows: In the apparatus of the first or second aspect, the length of each adjustment part is shorter than the length of each leg in each axial direction.

[0016] According to the device of the fourth aspect defined as above, the length of each adjustment part can be shortened, and the weight of each adjustment part can be reduced. Therefore, the load of the work for adjusting the position of each protrusion with respect to each leg part at the site can be reduced, and the height of each anchor bolt can be easily adjusted.

[0017] The fifth aspect of this invention is defined as follows. In the device of the fourth aspect, each of the adjustment parts is connected to an end of each of the leg parts on the side opposite to the anchor bolts.

[0018] According to the device of the fifth aspect defined as above, the length of the overlapping part of each leg part and the adjustment part in each axial direction can be shortened, and the length of each adjustment part can be further shortened.

[0019] The sixth aspect of this invention is defined as follows. In the device of the fifth aspect, male screw parts are formed at the ends of each of the leg parts, and each of the adjustment parts includes a nut screwed onto the male screw part and an L-shaped member having one end fixed to the nut, and the inner surface of the L-shaped member faces the outer surface of the male screw part.

[0020] According to the device of the sixth aspect defined as above, by rotating the nut screwed onto the male screw part formed at the end of each of the leg parts, the position of the protruding part protruding from the leg part in the L-shaped member can be easily adjusted. Furthermore, by using the L-shaped member, a configuration in which a part not in contact with other members is released can be easily realized. Also, since the inner surface of the L-shaped member faces the outer surface of the male screw part, it is possible to suppress interference between the male screw part and the L-shaped member when adjusting the position of the nut in the axial direction.

[0021] The seventh aspect of this invention is defined as follows. In the device of the first aspect or the second aspect, the plurality of leg parts include leg parts having different lengths in each of the axial directions.

[0022] According to the seventh-phase device defined in this way, if there is a step at the installation site, the length of the multiple legs can be made different from each other to accommodate the step.

[0023] The eighth aspect of this invention is defined as follows: A method for installing a pre-assembly type anchor bolt fixing device for the first or second phase at the installation site, Assemble the anchor bolt fixing device before installation. After adjusting the position of each protrusion relative to each leg in each axial direction, each protrusion is fixed to the part to be fixed at the installation location. Installation method for pre-assembly type anchor bolt fixing devices.

[0024] According to the installation method of the eighth phase as defined above, the anchor bolt fixing device is assembled before installation, thereby reducing the workload of on-site installation work. Then, the height of each anchor bolt can be adjusted on-site by adjusting the position of each protrusion relative to each leg in each axial direction. After that, the entire anchor bolt fixing device can be fixed to the fixed part by fixing each protrusion of each adjustment part to the fixed part.

[0025] The ninth aspect of this invention is defined as follows: A method for installing a pre-assembly type anchor bolt fixing device of the sixth phase at the installation site, Assemble the anchor bolt fixing device before installation. By rotating the nut relative to the male threaded portion, the position of each protrusion of the L-shaped member relative to each leg portion in each axial direction is adjusted, and then each protrusion is fixed to the part to be fixed at the installation location. Installation method for pre-assembly type anchor bolt fixing devices.

[0026] According to the installation method of the ninth phase as defined in this way, the position of each protrusion of the L-shaped member relative to each leg in each axial direction can be adjusted by rotating the nut on the male threaded portion at the site, and the height of each anchor bolt can be easily adjusted.

[0027] The tenth aspect of this invention is defined as follows: A method for installing a pre-assembly type anchor bolt fixing device of the seventh phase at the installation site, The difference in height at the installation site is measured, and the anchor bolt fixing device, which includes the legs set to a length corresponding to the difference in height, is assembled before installation. After adjusting the position of each protrusion relative to each leg in each axial direction, each protrusion is fixed to the part to be fixed at the installation location. Installation method for pre-assembly type anchor bolt fixing devices.

[0028] According to the installation method of the tenth phase as defined above, the step difference at the installation site is measured, and the legs, which are set to a length corresponding to the step difference, are included in the anchor bolt fixing device. Therefore, the anchor bolt fixing device can be installed even if there is a step difference at the installation site. Furthermore, by adjusting the position of each protrusion relative to each leg in each axial direction at the site, the height of each anchor bolt can be adjusted to account for the effect of the step difference.

[0029] The eleventh aspect of this invention is defined as follows: A method for assembling a pre-installation anchor bolt fixing device in the first or second phase, After connecting and fixing the plurality of anchor bolts in parallel using the frame, the plurality of legs are fixed to the plurality of anchor bolts in each axial direction, and then the plurality of adjustment parts are connected to the plurality of legs on the opposite side of each anchor bolt in each axial direction. Assembly method for a pre-installation type anchor bolt fixing device.

[0030] According to the assembly method of the tenth phase as defined above, the anchor bolt fixing device of the first phase can be assembled before installation. When adjusting the position of each protrusion relative to each leg in each axial direction, each protrusion is made to protrude more than each leg. [Brief explanation of the drawing]

[0031] [Figure 1] Front view of the anchor bolt fixing device. [Figure 2] Front and bottom views of the adjustment section. [Figure 3] A perspective view showing the end of the leg, the adjustment part, and the fixed part. [Figure 4] Front and bottom views of an example of a modified adjustment section. [Figure 5] Front and bottom views of other modified examples of the adjustment section. [Figure 6] Front and bottom views of other modified examples of the adjustment section. [Figure 7] Front and bottom views of other modified examples of the adjustment section. [Figure 8] Front view of an example of a modified anchor bolt fixing device. [Modes for carrying out the invention]

[0032] The following describes one embodiment of a pre-installation type anchor bolt fixing device that is assembled before installation and then installed on-site, with reference to the drawings.

[0033] As shown in Figure 1, the anchor bolt fixing device 10 includes a plurality of anchor bolts 11, a first frame 21, a second frame 22, a plurality of legs 31, and a plurality of adjustment parts 40, etc.

[0034] Multiple anchor bolts 11 have male threaded portions 11a formed on their upper parts. The upper parts of each anchor bolt 11 are fixed to the first frame 21 by inserting the male threaded portions 11a through holes (not shown) formed in the first frame 21 and tightening the fixing nuts 12. In this way, the first frame 21 holds the upper parts of the multiple anchor bolts 11 at predetermined intervals.

[0035] Multiple anchor bolts 11 have male threaded portions 11b formed at their lower ends. The lower ends of each anchor bolt 11 are fixed to the second frame 22 by inserting the male threaded portions 11b through holes (not shown) formed in the second frame 22 and tightening a fixing nut 13 (corresponding to a fixing member). In this way, the second frame 22 holds the lower ends of the multiple anchor bolts 11 at predetermined intervals. In other words, the second frame 22 (corresponding to a frame) connects and fixes the multiple anchor bolts 11 in parallel. A connecting nut 14 is tightened to the lower end (i.e., tip) of the male threaded portion 11b. The outer diameter of the connecting nut 14 is less than or equal to the outer diameter of the fixing nut 13. For example, the connecting nut 14 and the fixing nut 13 are the same size.

[0036] Each of the multiple leg portions 31 is formed in a cylindrical shape. The outer diameter of each leg portion 31 is smaller than the outer diameter of the anchor bolt 11. That is, the leg portion 31 is thinner than the anchor bolt 11. A male threaded portion 31a is formed on the upper part of each leg portion 31. A male threaded portion 31b is formed on the lower part (corresponding to the end) of each leg portion 31. A connecting nut 32 is tightened to the upper end (i.e., tip) of the male threaded portion 31a. The outer diameter of the connecting nut 32 is less than or equal to the outer diameter of the fixing nut 14, and preferably smaller than the outer diameter of the fixing nut 14. The connecting nut 14 tightened to the lower end of the anchor bolt 11 and the connecting nut 32 tightened to the upper end of the leg portion 31 are welded (i.e., fixed). In this way, each of the multiple leg portions 31 is fixed to each of the multiple anchor bolts 11 in the axial direction of the multiple anchor bolts 11. The multiple leg portions 31 extend in the axial direction of the multiple anchor bolts 11. The axes of the multiple anchor bolts 11 and the axes of the multiple leg portions 31 coincide.

[0037] Figure 2(a) is a front view of the adjustment unit 40, and Figure 2(b) is a bottom view of the adjustment unit 40. The adjustment unit 40 comprises a nut 41 and an L-angle 43.

[0038] The nut 41 can be screwed onto the male threaded portion 31b of the leg portion 31. The outer diameter of the nut 41 is less than or equal to the outer diameter of the fixing nut 14, and preferably smaller than the outer diameter of the fixing nut 14. For example, the nut 41 and the connecting nut 32 are the same size.

[0039] The L-angle 43 (corresponding to an L-shaped member) is formed, for example, from L-shaped steel (equal-leg angle steel). In the cross-section (section perpendicular to the longitudinal direction) of the L-angle 43, the lengths of the vertical and horizontal sides are less than or equal to the outer diameter of the nut 41. The length of the L-angle 43 is approximately equal to the axial length of, for example, the male threaded portion 31b.

[0040] The upper end (i.e., one end in the longitudinal direction) of the L-angle 43 is fixed to the bottom surface 41a of the nut 41, for example, by welding. The L-angle 43 does not overlap the threaded hole 41b of the nut 41. In other words, the L-angle 43 is fixed to the nut 41 in such a way that it does not interfere with the male threaded portion 31b when the nut 41 is screwed onto the male threaded portion 31b.

[0041] As shown in Figure 3, the adjustment part 40 is connected to the male threaded portion 31b (the end of the leg portion 31 opposite to the anchor bolt 11) by screwing a nut 41 onto the male threaded portion 31b of the leg portion 31. In this state, the inner surface 43a of the L-angle 43 faces the outer surface of the male threaded portion 31b. A gap is formed between the outer surface of the male threaded portion 31b and the inner surface 43a of the L-angle 43. In the axial direction of the anchor bolt 11, the length of the adjustment part 40 is shorter than the length of the leg portion 31, shorter than half the length of the leg portion 31, and about the same as the length of the male threaded portion 31b.

[0042] By rotating the nut 41 relative to the male threaded portion 31b, the position of the adjustment portion 40 in the axial direction of the male threaded portion 31b, that is, the amount of protrusion of the L-angle 43 (corresponding to the protruding portion) from the lower end of the male threaded portion 31b (the tip of the leg portion 31), can be adjusted. The L-angle 43 is supported by a support plate 51 fixed to the lean concrete R (see Figure 1). Therefore, the height of the anchor bolt 11 can be adjusted by adjusting the position of the adjustment portion 40 relative to the male threaded portion 31b in the axial direction of the anchor bolt 11. In addition, since the ends of the two mutually orthogonal faces of the L-angle 43 are each supported by the support plate 51, tilting of the adjustment portion 40, and consequently tilting of the leg portion 31 and the anchor bolt 11, is suppressed.

[0043] As described above, the outer diameter of the connecting nut 14 is less than or equal to the outer diameter of the fixing nut 13. The outer diameter of the connecting nut 32 is less than or equal to the outer diameter of the fixing nut 14. The outer diameter of the leg portion 31 is smaller than the outer diameter of the anchor bolt 11. The outer diameter of the nut 41 is less than or equal to the outer diameter of the fixing nut 14. The lengths of the vertical and horizontal sides of the L-angle 43 are less than or equal to the outer diameter of the nut 41. Therefore, the connecting nut 32, leg portion 31, and adjustment portion 40 that support each anchor bolt 11 are located within the range obtained by projecting the anchor bolt 11 and fixing nut 13 in the axial direction of the anchor bolt 11. That is, in each axial direction of the multiple anchor bolts 11, the portion of each L-angle 43 (adjustment portion 40) on the side of the second frame 22 of the anchor bolt fixing device 10 is located within the range obtained by projecting the multiple anchor bolts 11 and the multiple fixing nuts 13 in each axial direction.

[0044] Generally, reinforcing bars are not placed directly beneath the anchor bolt 11. Therefore, if each leg 31 extends linearly in the axial direction of the anchor bolt 11, it is possible to prevent the legs 31 from interfering with the reinforcing bars placed in the foundation when installing the anchor bolt fixing device 10.

[0045] Next, the assembly method of the anchor bolt fixing device 10 will be described with reference to Figure 1. The assembly of the anchor bolt fixing device 10 is carried out, for example, in a factory.

[0046] First, the upper part of each anchor bolt 11 is fixed to the first frame 21 with a fixing nut 12, and the lower part is fixed to the second frame 22 with a fixing nut 13. Note that it does not matter whether the upper or lower part of each anchor bolt 11 is fixed first, and at this stage, only the lower part may be fixed. In other words, multiple anchor bolts 11 can be connected in parallel and fixed using the second frame 22.

[0047] Next, the connecting nuts 14 are tightened onto the lower ends of the male threaded portions 11b of each anchor bolt 11. At this time, the lower end surfaces of the male threaded portions 11b and the lower end surfaces of the connecting nuts 14 are made flush.

[0048] Furthermore, each connecting nut 32 is tightened onto the upper end of the male threaded portion 31a of each leg portion 31 before it is fixed to each anchor bolt 11. At this time, the upper end surface of each male threaded portion 31a and the upper end surface of each connecting nut 32 are made flush.

[0049] Next, the lower end of each connecting nut 14 and the upper end of each connecting nut 32 are welded together to fix each leg portion 31 to each anchor bolt 11. In other words, multiple leg portions 31 are fixed to multiple anchor bolts 11 in each axial direction of multiple anchor bolts 11.

[0050] Next, the nuts 41 of each pre-assembled adjustment part 40 are screwed onto the male threaded portion 31b of each of the multiple leg portions 31. That is, the multiple adjustment parts 40 are connected to the multiple leg portions 31 on the opposite side of each anchor bolt 11 in each axial direction of the multiple anchor bolts 11. With this, the assembly of the anchor bolt fixing device 10 is completed. When adjusting the position of each L-angle 43 relative to each leg portion 31 in each axial direction, each L-angle 43 is made to protrude beyond the lower end of each leg portion 31.

[0051] Next, the method for installing the anchor bolt fixing device 10 at the installation location will be explained. The anchor bolt fixing device 10 is pre-assembled as described above before being transported to the installation location. Here, since the multiple legs 31 are pre-fixed to the multiple anchor bolts 11, there is no need to adjust the relative positions of the heavy anchor bolts 11 and legs 31 on site.

[0052] As shown in Figure 3, the worker rotates each nut 41 on the male threaded portion 31b of each leg 31 to adjust the position of each adjustment part 40 in the axial direction of each male threaded portion 31b, that is, the amount of protrusion of each L-angle 43 from the lower end of each male threaded portion 31b. This makes it easy to adjust the height of each anchor bolt 11 supported by each support plate 51 via each adjustment part 40. Furthermore, since the adjustment part 40 can be made short and lightweight, the burden on the worker can be reduced.

[0053] Next, each L-angle 43 is fixed to each support plate 51 by welding the lower end of each L-angle 43 to the upper surface of each support plate 51. This completes the fixing of the anchor bolt fixing device 10 to its installation location. According to the above installation method, since the anchor bolt fixing device 10 is assembled before installation, the workload of on-site installation can be reduced.

[0054] In this state, a gap is formed between the outer surface of the male threaded portion 31b of the leg portion 31 and the inner surface of the L-angle 43. That is, in the adjustment portion 40, the nut 41 is in contact with the male threaded portion 31b, but the portion that is not in contact with other members is open. In other words, no closed space is formed inside the adjustment portion 40.

[0055] When pouring foundation concrete around the anchor bolt fixing device 10, concrete is poured around the anchor bolt fixing device 10. At this time, the parts of the multiple adjustment parts 40 that are not in contact with other members can be filled with the poured concrete. Consequently, the formation of spaces that are not filled with concrete inside the multiple adjustment parts 40 can be suppressed.

[0056] Furthermore, the above embodiment can also be implemented with the following modifications. Parts identical to those in the above embodiment are denoted by the same reference numerals, and their descriptions are used accordingly.

[0057] The range in which the male thread portion 31b is formed on the leg portion 31 may be extended from the lower end to the middle portion of the leg portion 31. In that case, the length of the L-angle 43 and the position of the adjustment portion 40 relative to the male thread portion 31b should be adjusted according to the length of the male thread portion 31b.

[0058] - The connecting nuts 32, leg portions 31, and parts of the adjustment portion 40 that support each anchor bolt 11 do not have to be located within the range projected onto the anchor bolt 11 and fixing nuts 13 in the axial direction of the anchor bolt 11. In other words, in the axial direction of each of the multiple anchor bolts 11, parts of the portion of the anchor bolt fixing device 10 that is on the side of each L-angle 43 (adjustment portion 40) from the second frame 22 do not have to be located within the range projected onto the multiple anchor bolts 11 and the multiple fixing nuts 13 in the axial direction of each.

[0059] In the adjustment section 40A shown in Figure 4, a split pipe 43A (i.e., a semi-cylindrical section) is provided instead of the L-angle 43. The outer diameter of the split pipe 43A is less than or equal to the outer diameter of the nut 41. The upper end (i.e., one end in the longitudinal direction) of the split pipe 43A is fixed to the bottom surface 41a of the nut 41, for example, by welding. The split pipe 43A does not overlap the threaded hole 41b of the nut 41. With the above configuration, it is easier to accommodate the split pipe 43A (corresponding to the protruding part) below the nut 41. When this adjustment section 40A is connected to the male threaded portion 31b of the leg portion 31, a gap is formed between the outer surface of the male threaded portion 31b and the inner surface of the split pipe 43A.

[0060] In the adjustment section 40B shown in Figure 5, a half-split square steel pipe 43B (i.e., a channel-shaped member) is provided instead of the L-angle 43. In the cross-section (cross-section perpendicular to the longitudinal direction) of the half-split square steel pipe 43B, the length of each side is less than or equal to the outer diameter of the nut 41. The upper end (i.e., one end in the longitudinal direction) of the half-split square steel pipe 43B is fixed to the bottom surface 41a of the nut 41, for example by welding. The half-split square steel pipe 43B does not overlap the threaded hole 41b of the nut 41. When this adjustment section 40B is connected to the male threaded portion 31b of the leg portion 31, a gap is formed between the outer surface of the male threaded portion 31b and the inner surface of the half-split square steel pipe 43B. With the above configuration, when the adjustment part 40B is connected to the male threaded portion 31b of the leg portion 31, the leg portion 31 is supported by the three flat plate portions of the half-square steel pipe 43B surrounding the male threaded portion 31b, thereby stabilizing the support of the leg portion 31 and, consequently, the support of the anchor bolt 11.

[0061] In the adjustment section 40C shown in Figure 6, a channel steel 43C (i.e., a channel member) is provided instead of the L-angle 43. In the cross-section (section perpendicular to the longitudinal direction) of the channel steel 43C, the length of each side is less than or equal to the outer diameter of the nut 41. The upper end (i.e., one end in the longitudinal direction) of the channel steel 43C is fixed to the bottom surface 41a of the nut 41, for example by welding. The channel steel 43C does not overlap the threaded hole 41b of the nut 41. When this adjustment section 40C is connected to the male threaded portion 31b of the leg portion 31, a gap is formed between the outer surface of the male threaded portion 31b and the inner surface of the channel steel 43C. With the above configuration, when this adjustment section 40C is connected to the male threaded portion 31b of the leg portion 31, the leg portion 31 is supported by the three flat plate portions of the channel steel 43C surrounding the male threaded portion 31b, thereby stabilizing the support of the leg portion 31 and, consequently, the support of the anchor bolt 11.

[0062] The adjustment section 40D shown in Figure 7 is equipped with two flat plates 43D (i.e., plate members) instead of the L-angle 43. The length of the flat plate 43D in the shorter direction is less than or equal to the length (outer diameter) of one side of the nut 41. The upper end (i.e., one end in the longitudinal direction) of the flat plate 43D is fixed to the bottom surface 41a of the nut 41, for example by welding. The flat plate 43D does not overlap the screw hole 41b of the nut 41. With the above configuration, when the adjustment section 40D is connected to the male screw portion 31b of the leg portion 31, the leg portion 31 is supported by the flat plates 43D on both sides of the male screw portion 31b, thereby stabilizing the support of the leg portion 31 and, consequently, the support of the anchor bolt 11.

[0063] The anchor bolt fixing device 10A shown in Figure 8 includes legs 31 and 31A, each having a different length in the axial direction of multiple anchor bolts 11. The installation method for the anchor bolt fixing device 10A includes the steps of measuring the step S (here, the height of the protrusion) at the installation site and assembling the anchor bolt fixing device 10A, which includes legs 31A set to a length corresponding to the step S, before installation. Then, after adjusting the position of each L-angle 43 of each adjustment part 40 relative to each leg 31, 31A in the axial direction of the multiple anchor bolts 11, each L-angle 43 is fixed to a support plate 51 (not shown) provided at the installation site. According to the above installation method, the anchor bolt fixing device 10A can be installed even if there is a step S at the installation site. Note that there may be multiple steps S, and if there is a recess instead of a protrusion, this can be accommodated by extending the length of the legs 31A.

[0064] The connection nut 14 and the connection nut 32 may be fixed not only by welding, but also by adhesive or resin curing.

[0065] The support plate 51 is not limited to being fixed to the L-angle 43, the split pipe 43A, the split square steel pipe 43B, the channel steel 43C, and the flat plate 43D by welding; it may also be fixed by adhesive or by resin curing. [Explanation of Symbols]

[0066] 10, 10A... Anchor bolt fixing device, 11... Anchor bolt, 22... Second frame (frame), 31, 31A... Leg section, 40, 40A, 40B, 40C, 40D... Adjustment section, 43... L-angle (protruding section), 43A... Half-split pipe (protruding section), 43B... Half-split square steel pipe (protruding section), 43C... Channel steel (protruding section), 43D... Flat plate (protruding section).

Claims

1. An anchor bolt fixing device that is assembled before installation, In the state before installing the aforementioned pre-assembly type anchor bolt fixing device, Multiple anchor bolts, The frame, which is fixed by connecting the aforementioned multiple anchor bolts in parallel, Multiple legs are fixed to each of the multiple anchor bolts in the axial direction of each of the multiple anchor bolts and extend linearly in the axial direction of each of the multiple anchor bolts, An adjustment part connected to each of the aforementioned multiple legs, the adjustment part having a protruding portion, the protruding portion extending further than each leg on the opposite side of each anchor bolt in each axial direction, Equipped with, Each adjustment part is connected to the end of each leg opposite to the respective anchor bolt, A male threaded portion is formed at the end of each of the aforementioned legs. Each of the adjustment parts includes a nut that screws onto the male thread and a protruding part with one end fixed to the nut, wherein the inner surface of the protruding part faces the outer surface of the male thread and a gap is formed between the outer surface of the male thread and the inner surface of the protruding part. By rotating the nut relative to the male threaded portion, the protruding position of each protrusion relative to each leg portion in each axial direction can be adjusted. A pre-installation, pre-assembly type anchor bolt fixing device.

2. The aforementioned multiple anchor bolts are each fixed to the frame by a plurality of fixing members. The apparatus according to claim 1, wherein in each axial direction, the portion of the anchor bolt fixing device on the side of the frame to each protruding portion is contained within the ranges obtained by projecting the plurality of anchor bolts and the plurality of fixing members in each axial direction.

3. The apparatus according to claim 1 or 2, wherein the length of each adjustment part in each axial direction is shorter than half the length of each leg part.

4. The apparatus according to claim 1 or 2, wherein the protruding portion is an L-shaped member with an L-shaped cross-section, one end of which is fixed to the nut, the inner surface of the L-shaped member faces the outer surface of the male threaded portion, and a gap is formed between the outer surface of the male threaded portion and the inner surface of the L-shaped member.

5. The apparatus according to claim 1 or 2, wherein, in the state prior to the installation of the pre-assembly type anchor bolt fixing device, the plurality of legs include legs whose lengths in each axial direction are different from each other.

6. A method for installing a pre-assembly type anchor bolt fixing device according to claim 1 or 2 at an installation site, Assemble the anchor bolt fixing device before installation. After adjusting the position of each protrusion relative to each leg in each axial direction by rotating the nut relative to the male threaded portion, each protrusion is fixed to the part to be fixed at the installation location. Installation method for pre-assembly type anchor bolt fixing devices.

7. A method for installing the pre-assembly type anchor bolt fixing device described in claim 5 at the installation site, The difference in height at the installation site is measured, and the anchor bolt fixing device, which includes the legs set to a length corresponding to the difference in height, is assembled before installation. After adjusting the position of each protrusion relative to each leg in each axial direction, each protrusion is fixed to the part to be fixed at the installation location. Installation method for pre-assembly type anchor bolt fixing devices.

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