Anchor bolt support device

Abstract

To provide an anchor bolt support device having a height adjustment function that allows relatively large height adjustment to be easily performed without impeding the arrangement of reinforcement in foundation concrete.SOLUTION: An anchor bolt support device 1 includes a support column 5 that supports an anchor bolt 4. The support column 5 includes a first angle member 10 extending in the vertical direction, and a second angle member 11 extending in the vertical direction with its lower end overlapping an upper end of the first angle member 10. The second angle member 11 includes a first flat plate portion 11a and a second flat plate portion 11b that intersect with each other, a plurality of first height adjustment holes 23 that penetrate the first flat plate portion 11a and are aligned with each other in the vertical direction, and a plurality of second height adjustment holes 24 that penetrate the second flat plate portion 11b and are aligned with each other in the vertical direction. The first height adjustment holes 23 and the second height adjustment holes 24 are arranged alternately with their upper ends offset from each other in the vertical direction.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an anchor bolt support device that is erected on a foundation surface to support an anchor bolt in order to place the anchor bolt in a predetermined position. [Background technology]

[0002] Patent Documents 1 and 2 describe an anchor bolt support device with a height adjustment function that supports an anchor bolt, which is embedded in the foundation concrete of a building with a threaded portion at the upper end of the anchor bolt protruding, in a state before the foundation concrete is poured. After the foundation concrete is poured, the anchor bolt is fixed to the foundation concrete, so such an anchor bolt support device embedded in the foundation concrete does not need to contribute to fixing the anchor bolt.

[0003] The anchor bolt support device described in Patent Document 1 includes an angle bar (support member) extending in the vertical direction, a stud bolt (connection support part) whose lower end abuts against the inner surface of the upper end of the angle bar, a height adjustment nut screwed onto the lower end of the stud bolt and placed on the upper end surface of the angle bar, a bent bolt bent into an L-shape to press the lower end of the stud bolt against the inner surface of the upper end of the angle bar, and nuts screwed onto both ends of the bent bolt and abut against the outer surface of the upper end of the angle bar. When an operator rotates the height adjustment nut with the nut loosened from the bent bolt, the stud bolt is displaced up and down. This changes the length of the support bar, and the height of the anchor bolt fixed to the upper end of the support bar can be adjusted.

[0004] The anchor bolt support device described in Patent Document 2 includes an angle bar (first angle bar) extending in the vertical direction, a plate-like member (adjustment nut) with a screw hole facing the vertical direction and fixed to the inner surface of the angle bar, a height adjustment bolt (adjustment bolt) screwed into the nut so that the screw tip abuts against the lower end of the anchor bolt, a bent bolt (L bolt) that presses the lower end of the anchor against the inner surface of the upper end of the angle bar, and nuts that screw into both ends of the bent bolt and abut against the outer surface of the upper end of the angle bar. With the nut loosened from the bent bolt, an operator adjusts the height of the anchor bolt by screwing the height adjustment bolt forward or backward into the screw hole.

[0005] In addition, the foundation concrete contains reinforcing bars, which are also arranged around the anchor bolt support device. The height adjustment structures described in Patent Documents 1 and 2 are configured to barely bulge horizontally relative to the angle members, stud bolts, or anchor bolts, and therefore do not impede the arrangement of reinforcing bars. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2006-161304 A [Patent Document 2] JP 2020-105881 A Summary of the Invention [Problem to be solved by the invention]

[0007] However, in the above-mentioned conventional technology, the height is adjusted by rotating a nut or bolt for height adjustment, so the change in height of the anchor bolt is small compared to the amount of work required. Therefore, although it is convenient for adjusting the height by a few millimeters, adjusting the height by a few centimeters requires a lot of work, and the work efficiency is poor.

[0008] In view of the above background, an object of the present invention is to provide an anchor bolt support device having a height adjustment function that can easily perform a relatively large height adjustment without interfering with the arrangement of reinforcement in the foundation concrete. [Means for solving the problem]

[0009] In one aspect of the present invention to solve the above-mentioned problems, there is provided an anchor bolt support device (1, 31, 41, 51, 61, 71) that is erected on a foundation surface (2) to support an anchor bolt (4) in a predetermined position, the device comprising: a base portion (3) fixed to the foundation surface; and a support portion (5, 32, 42, 52, 62, 72) erected on the base portion and supporting the anchor bolt at an upper end portion, the support portion including a first angle member (10) extending in the vertical direction and a second angle member (11, 43, 53, 63) extending in the vertical direction and overlapping an upper end portion of the first angle member at its lower end, one of the upper end portion of the first angle member and the lower end portion of the second angle member having an elongated hole (22) extending in the vertical direction, The other of the upper end and the lower end of the second angle iron has a through hole (25) that aligns with the long hole, and the first angle iron and the second angle iron are fixed to each other by a fastener (26) inserted into the long hole and the through hole, and the second angle iron includes a first flat plate portion (11a, 43a, 53a, 63a) and a second flat plate portion (11b, 43b, 53b, 63b) that extend in the vertical direction and intersect with each other to form an L-shape in a planar view, a plurality of first height adjustment holes (23, 54, 64) that penetrate the first flat plate portion and are aligned with each other in the vertical direction, and a plurality of second height adjustment holes (24, 55, 65) that penetrate the second flat plate portion and are aligned with each other in the vertical direction, and the first height adjustment holes and the second height adjustment holes are arranged alternately with their upper ends offset from each other in the vertical direction.

[0010] According to this embodiment, by alternately inserting a tool into the first height adjustment hole and the multiple second height adjustment holes that are alternately arranged with a vertical offset, the height of the second angle bar, which is relatively long (several centimeters or more), can be easily adjusted in a short time. The structure for height adjustment hardly protrudes horizontally, so it does not interfere with the arrangement of reinforcement.

[0011] In the above aspect, the upper portions of the first height adjustment hole (23, 54, 64) and the second height adjustment hole (24, 55, 65) may have a shape that tapers upward.

[0012] According to this aspect, a tool can be easily inserted into the tapered lower end portion, and the tool is guided toward the upper end of the first height adjustment hole or the second height adjustment hole, preventing the tool from shifting in the width direction at the upper end.

[0013] In the above aspect, each of the first height adjustment hole (23) and the second height adjustment hole (24) may be rhombus-shaped with one diagonal extending in the up-down direction.

[0014] According to this aspect, the tool can be easily inserted into the center of the diamond, and the tool is guided toward the upper end of the first height adjustment hole or the second height adjustment hole, suppressing shifting of the tool in the width direction at the upper end.

[0015] In the above aspect, the first height adjustment holes (23, 54, 64) and the second height adjustment holes (24, 55, 65) may have the same shape and be disposed at regular intervals from each other.

[0016] According to this aspect, the worker can change the height of the second angle iron by the same amount with respect to any of the first height adjustment holes or second height adjustment holes with the same amount of operation.

[0017] In the above aspect, it is preferable that the inner surface of the lower end portion of the second angle member (11, 43, 53, 63) of the support portion (5, 42, 52, 62, 72) overlaps with the outer surface of the upper end portion of the first angle member (10).

[0018] According to this aspect, the tip of the tool can be abutted against the upper end of the second flat plate portion or the first flat plate portion, thereby ensuring the distance between the tip of the tool, which serves as the fulcrum, and the middle part of the tool, which abuts against the upper end of the first height adjustment hole or the second height adjustment hole and serves as the point of action, thereby increasing the vertical movement distance of the second angle iron that can be adjusted using one first height adjustment hole or second height adjustment hole.

[0019] In the above aspect, it is preferable that the first height adjustment hole (23, 54, 64) is positioned on the second flat plate portion (11b, 43b, 53b, 63b) side relative to the long hole (22) or the through hole (25) provided in the first flat plate portion (11a, 43a, 53a, 63a), and the second height adjustment hole (24, 55, 65) is positioned on the first flat plate portion side relative to the long hole or the through hole provided in the second flat plate portion.

[0020] According to this configuration, the first height adjustment hole and the second height adjustment hole are positioned closer to the corner of the second angle iron 11 than the long hole or through hole, so that when adjusting the position of the tip of the tool that serves as the fulcrum, the change in angle of the tool relative to the second flat plate portion or the first flat plate portion is small, making it easier to adjust the position of the tip of the tool.

[0021] In the above embodiment, the support portion (72) may further include an anchor bolt fastening nut (73) fixed to the upper end of the second angle member (63) and into which the lower end of the anchor bolt (4) is screwed.

[0022] With this configuration, the length of the overlapping portion between the anchor bolt and the second angle iron can be shortened, thereby preventing the anchor bolt from covering the first and second height adjustment holes and making it impossible to insert tools into the first and second height adjustment holes. Effect of the Invention

[0023] According to the above aspect, it is possible to provide an anchor bolt support device having a height adjustment function that can easily perform a relatively large height adjustment without interfering with the reinforcement of the foundation concrete. [Brief description of the drawings]

[0024] [Figure 1] FIG. 1 is a partial cross-sectional front view (cross-section perpendicular to the front-rear direction and passing through the center in the front-rear direction) of the anchor bolt support device according to the first embodiment; [Diagram 2] FIG. 1 is a perspective view of an upper portion of a support column in an anchor bolt support device according to a first embodiment; [Diagram 3] FIG. 1 is a perspective view of an upper portion of a support column in an anchor bolt support device according to a first embodiment; [Figure 4] FIG. 1 is a front view of an upper portion of a support column in an anchor bolt support device according to a first embodiment; [Diagram 5] FIG. 11 is a front view of an upper portion of a support column in an anchor bolt support device according to a second embodiment; [Figure 6] FIG. 13 is a perspective view of an upper portion of a support column in an anchor bolt support device according to a third embodiment; [Figure 7] FIG. 13 is a front view of an upper portion of a support column in an anchor bolt support device according to a fourth embodiment; [Figure 8] FIG. 13 is a perspective view of an upper portion of a support column in an anchor bolt support device according to a fifth embodiment; [Figure 9] 13 is a front view of an upper portion of a support column in an anchor bolt support device according to a sixth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a partial cross-sectional front view of an anchor bolt support device 1 according to a first embodiment. As shown in Fig. 1, the anchor bolt support device 1 includes a base portion 3 fixed to a foundation surface 2, and a support portion 5 erected on the base portion 3 and supporting an anchor bolt 4. The foundation surface 2 is the surface of the foundation ground, but may be the top surface of concrete. The anchor bolt support device 1 is installed at a predetermined position while supporting the anchor bolt 4, and then reinforcing bars (not shown) constituting the foundation concrete 6 are arranged, and concrete is poured, so that the anchor bolt support device 1 and the lower portion of the anchor bolt 4 are embedded in the foundation concrete 6.

[0026] The base portion 3 includes long members 7 such as angle irons combined to form a rectangular frame shape in a plan view. The base portion 3 is placed on a foundation surface 2 and fixed to the foundation surface 2 by anchor members 8.

[0027] Four support columns 5 are provided, and stand at each of the four corners of the base section 3, which is rectangular in plan view. Each of the four support columns 5 extends in the vertical direction, is fixed to the base section 3 at its lower end by a fastener 9 such as a bolt and a nut, and supports an anchor bolt 4 at its upper end. The support columns 5 include a first angle member 10 extending in the vertical direction, and a second angle member 11 disposed above the first angle member 10 and extending in the vertical direction. The first angle member 10 and the second angle member 11 each have an inner surface (two flat surfaces forming an angle of approximately 90°) and an outer surface (two flat surfaces forming an angle of approximately 270°) that are L-shaped in plan view, and are disposed so that the inner surface faces the inside of the base section 3 and the outer surface faces the outside of the base section 3. The first angle iron 10 and the second angle iron 11 may be formed by processing a flat steel plate such as bending and drilling holes, or may be formed by processing a commercially available angle iron such as drilling holes.

[0028] 1 to 3, the first angle iron 10 has a lower end portion fixed to a corner portion of the base portion 3 by fasteners 9 such as bolts and nuts. The first angle iron 10 includes a first flat plate portion 10a and a second flat plate portion 10b which extend in the vertical direction and intersect with each other to form an L-shape in a plan view.

[0029] The second angle member 11 is overlapped on the first angle member 10 so that the inner surface of the lower end abuts against the outer surface of the upper end of the first angle member 10, and is fixed to the first angle member 10 by a fastener 26. The second angle member 11 includes a first flat plate portion 11a and a second flat plate portion 11b which extend vertically and cross each other to form an L-shape in a plan view. The inner surface of the lower part of the first flat plate portion 11a of the second angle member 11 abuts against the outer surface of the upper part of the first flat plate portion 10a of the first angle member 10, and the inner surface of the lower part of the second flat plate portion 11b of the second angle member 11 abuts against the outer surface of the upper part of the second flat plate portion 10b of the first angle member 10. The upper parts of the first flat plate portion 11a and the second flat plate portion 11b are each provided with a long hole 13 extending horizontally at the same height. The tip of a bent bolt 14, which is L-shaped in plan view, is inserted into the long hole 13 from the inner surface side, and nuts 15 are screwed onto the two tip parts of the bent bolt 14 from the outer surface side. By tightening the nut 15 onto the tip part of the bent bolt 14, the lower end part of the anchor bolt 4 is sandwiched and fixed between the inner surface at the upper part of the second angle member 11 and the middle part of the bent bolt 14. Since the hole through which the bent bolt 14 is inserted is the long hole 13, horizontal displacement of the bent bolt 14 that occurs when the nut 15 is tightened onto the bent bolt 14 is permitted. The second angle member 11 is widened at the upper part so that the long hole 13 can be provided.

[0030] As shown in FIG. 1, the anchor bolt 4 supported by the anchor bolt support device 1 extends in the vertical direction and is disposed on an extension line of the support column 5. A screw thread is formed on the side peripheral surface of the lower end and the upper end of the anchor bolt 4. A fixing plate 16 and two nuts 17 that hold the fixing plate 16 from above and below are attached to a portion of the lower end of the anchor bolt 4 above the upper end of the second angle member 11. The fixing plate 16 is a flat steel plate and has a through hole (not shown) through which the lower end of the anchor bolt 4 is inserted. The two nuts 17 are screwed into the lower end of the anchor bolt 4 to fix the fixing plate 16 to the anchor bolt 4. The portion of the anchor bolt 4 that is embedded in the foundation concrete 6 and is above the fixing plate 16 and the two nuts 17 may be inserted into an unbond sleeve 18. A base plate 19 for fixing a column member (not shown) made of a steel pipe, H-shaped steel or the like is attached to the upper ends of the four anchor bolts 4, and a nut 20 for fixing the base plate 19 is attached to each anchor bolt 4. The base plate 19 has four through holes (not shown) that penetrate in the vertical direction, and the corresponding anchor bolts 4 are inserted into the four through holes. Mortar 21 is poured between the upper surface of the foundation concrete 6 and the base plate 19.

[0031] Figures 2 to 4 show the upper part of the support part 5. Figure 2 is a perspective view of the anchor bolt support device 1 seen from diagonally above on the outside, Figure 3 is a perspective view of the anchor bolt support device 1 seen from diagonally above on the inside, and Figure 4 is a front view. The height adjustment function and structure of the first angle member 10 and the second angle member 11 will be described with reference to Figures 2 to 4.

[0032] The second angle member 11 is provided with a long hole 22 for adjustably fixing the vertical position of the second angle member 11 relative to the first angle member 10, and a plurality of first height adjustment holes 23 and a plurality of second height adjustment holes 24 used to adjust the vertical position of the second angle member 11 relative to the first angle member 10.

[0033] The long hole 22 is provided below the long hole 13 through which the bent bolt 14 is inserted. The long hole 22 is provided in each of the first flat plate portion 11a and the second flat plate portion 11b of the second angle member 11, and extends in the vertical direction. The first flat plate portion 10a and the second flat plate portion 10b of the first angle member 10 each have a through hole 25 at a position that matches the corresponding long hole 22. The second angle member 11 is fixed to the first angle member 10 by a fastener 26 including a bolt 26a whose shaft portion is inserted through the long hole 22 and the through hole 25 and a nut 26b screwed onto the shaft portion of the bolt 26a. When the nut 26b is loosened from the fastening of the shaft portion of the bolt 26a, the shaft portion of the bolt 26a can move within the long hole 22, and the second angle member 11 can be displaced in the vertical direction relative to the first angle member 10.

[0034] A plurality of (four in the illustrated example) first height adjustment holes 23 are arranged to pass through the first flat plate portion 11a of the second angle member 11, aligned with each other in the vertical direction, and positioned closer to the second flat plate portion 11b than the long hole 22 provided in the first flat plate portion 11a. A plurality of (three in the illustrated example) second height adjustment holes 24 are arranged to pass through the second flat plate portion 11b of the second angle member 11, aligned with each other in the vertical direction, and positioned closer to the first flat plate portion 11a than the long hole 22 provided in the second flat plate portion 11b. The plurality of first height adjustment holes 23 and the plurality of second height adjustment holes 24 are arranged alternately with their upper ends shifted from each other in the vertical direction. That is, the first height adjustment holes 23 and the second height adjustment holes 24 are arranged alternately from the top to the bottom, and their upper ends are shifted from each other in the vertical direction. The first and second height adjustment holes 23 and 24 are preferably of the same shape, and in this embodiment, are rhombic in shape with one diagonal extending vertically when viewed from the penetrating direction of the holes. The first and second height adjustment holes 23 and 24 are preferably arranged at regular intervals.

[0035] The worker adjusts the height of the second angle iron 11 using a tool 27 (e.g., a spear) having a tip that can be inserted into the first height adjustment hole 23 and the second height adjustment hole 24. It is preferable to use two tools 27. With the nut 26b loosened from the shaft of the bolt 26a, the worker inserts one of the tools 27 into the first height adjustment hole 23 from the outside, abuts its tip against the upper end of the second flat plate portion 10b of the first angle iron 10, and moves the rear part of the tool 27 upward or downward with the tip of the tool 27 as a fulcrum. At this time, the middle part of the tool 27 supports the upper end of the first height adjustment hole 23 through which the tool 27 has been inserted, so that the second angle iron 11 moves up and down. When it is desired to move the second angle iron 11 further upward or downward, the worker inserts the other tool 27 into the second height adjustment hole 24 from the outside, abuts its tip against the upper end of the first flat plate portion 10a of the first angle iron 10, and uses the tip of the tool 27 as a fulcrum to move the rear part of the tool 27 upward or downward, thereby moving the second angle iron 11 upward or downward. When it is desired to move the second angle iron 11 further upward or downward, the worker pulls out one of the tools 27 from the first height adjustment hole 23 into which it was inserted, inserts it into the other adjacent first height adjustment hole 23 from the outside, and moves the second angle iron 11 upward or downward in the same manner. In this way, by successively changing and operating the first height adjustment hole 23 and the second height adjustment hole 24 into which the worker inserts the two tools 27, it is possible to easily perform not only height adjustment of a few millimeters (for example, level adjustment of the four anchor bolts 4) but also height adjustment of the relatively long second angle iron 11 of several centimeters or more (for example, height adjustment according to the height of the foundation concrete 6 (see FIG. 1) which differs from construction site to construction site). When the second angle iron 11 reaches the desired height, the nut 26b is tightened onto the bolt 26a to fix the second angle iron 11 to the first angle iron 10.

[0036] Since the multiple first height adjustment holes 23 and the multiple second height adjustment holes 24 are arranged alternately and shifted in the vertical direction, even when adjusting the height of the second angle iron 11 which is relatively long, a worker can easily adjust the height in a short amount of time by inserting two tools 27 into the first height adjustment hole 23 and the second height adjustment hole 24.

[0037] Of the components related to the height adjustment function, only the fastener 26 protrudes horizontally from the first angle member 10 or the second angle member 11. The protruding width of the fastener 26 is small and equivalent to the protruding width of the bent bolt 14, nut 15, and fastener 9, so it does not interfere with reinforcement arrangement.

[0038] Since the first height adjustment hole 23 and the second height adjustment hole 24 have a diamond shape, their central portions are wide and their upper portions are tapered. Since the central portions are wide, it is easy to insert the tool 27 into the first height adjustment hole 23 and the second height adjustment hole 24. Since the upper portions are tapered, the tool 27 is guided when the middle portion of the tool 27 approaches the upper ends of the first height adjustment hole 23 and the second height adjustment hole 24, and horizontal deviation of the tool 27 when moving the tool 27 up and down is suppressed.

[0039] Since the first height adjustment hole 23 and the second height adjustment hole 24 have the same shape and are arranged at a fixed interval from each other, the worker can change the height of the second angle iron 11 by the same amount for any of the first height adjustment holes 23 or second height adjustment holes 24 with the same amount of operation.

[0040] The second angle member 11 is displaced up and down by the principle of leverage with the tip of the tool 27 as the fulcrum, the middle part of the tool 27 as the point of application, and the rear part of the tool 27 as the point of force, so that the height of the second angle member 11 can be adjusted with less force than when an operator moves the second angle member 11 up and down by directly holding it with his / her hand. The tip of the tool 27 inserted into the first height adjustment hole 23 abuts against the upper end of the second flat plate portion 10b of the first angle member 10, and the tip of the tool 27 inserted into the second height adjustment hole 24 abuts against the upper end of the first flat plate portion 10a of the first angle member 10, so that the position of the tip of the tool 27 can be separated from the first height adjustment hole 23 or the second height adjustment hole 24 by the length of the upper end of the second flat plate portion 10b or the first flat plate portion 10a. Therefore, the vertical movement distance of the second angle member 11 that can be adjusted using one first height adjustment hole 23 or the second height adjustment hole 24 can be increased.

[0041] Since the first height adjustment hole 23 and the second height adjustment hole 24 are positioned closer to the corner of the second angle iron 11 than the long hole 22, when adjusting the position of the tip of the tool 27 which serves as a fulcrum, the change in angle of the tool 27 relative to the second flat plate portion 11b or the first flat plate portion 11a is small, making it easier to adjust the position of the tip of the tool 27.

[0042] Next, a second embodiment of the present invention will be described with reference to Fig. 5. In the description, configurations common to the first embodiment will be omitted and the same reference numerals will be used. Fig. 5 is a front view showing an upper part of a support part 32 in an anchor bolt support device 31 according to the second embodiment.

[0043] The structure of the anchor bolt support device 31 in the second embodiment differs from the first embodiment only in that the lower end of the second angle iron 11 overlaps the upper end of the first angle iron 10 in such a way that the outer surface of the second angle iron 11 and the inner surface of the first angle iron 10 abut against each other.

[0044] In the second embodiment, the height of the second angle iron 11 is adjusted by having an operator insert a tool 27 into the first height adjustment hole 23 or the second height adjustment hole 24 from the inside while the nut 26b is loosened from the shaft portion of the bolt 26a, and abutting the part near the tip of the tool 27 against the outer edge of the upper end of the first flat portion 10a (when the tool 27 is inserted into the first height adjustment hole 23) or the second flat portion 10b (when the tool 27 is inserted into the second height adjustment hole 24) of the first angle iron 10, and moving the rear of the tool 27 up and down using this point as a fulcrum.

[0045] Next, a third embodiment of the present invention will be described with reference to Fig. 6. In the description, configurations common to the first embodiment will be denoted by the same reference numerals and description thereof will be omitted. Fig. 6 is a front view showing an upper portion of a support part 42 in an anchor bolt support device 41 according to the third embodiment. The anchor bolt support device 41 according to the third embodiment differs from the first embodiment in the configuration for fixing the anchor bolt 4 to the second angle member 43.

[0046] The second angle iron 43 differs from the second angle iron 11 of the first embodiment only in that it does not have a long hole 13 (see FIG. 3) for a bent bolt 14. The second angle iron 43 includes a first flat plate portion 43a and a second flat plate portion 43b that extend in the vertical direction so as to form an L shape in a plan view.

[0047] The support section 42 further includes a steel plate member 44 that is fixed to the upper part of the second angle member 43 and surrounds the anchor bolt 4 in the circumferential direction in cooperation with the second angle member 11. The steel plate member 44 is fixed at both circumferential ends to both circumferential ends of the second angle member 43 (the side edge of the first flat plate portion 43a and the side edge of the second flat plate portion 43b) by welding or the like, and has a screw hole 45 facing the L-shaped corner of the second angle member 11 in the circumferential center. The steel plate member 44 is bent in the vicinity of both circumferential ends so that the area it surrounds in cooperation with the second angle member 11 in a plan view is expanded. A bolt 46 is screwed into the screw hole 45 so that the screw tip abuts against the lower part of the anchor bolt 4 that abuts against the inner surface of the corner part. The screw tip of the bolt 46 presses the lower part of the anchor bolt 4 against the inner surface of the second angle member 43, thereby fixing the anchor bolt 4 to the second angle member 43.

[0048] Next, a fourth embodiment of the present invention will be described with reference to FIG. 7. In the description, the description of the configurations common to the first embodiment will be omitted and the same reference numerals will be used. FIG. 7 is a front view showing an upper part of a support part 52 in an anchor bolt support device 51 according to the fourth embodiment. In the anchor bolt support device 51 according to the fourth embodiment, only the shapes of the first height adjustment hole 54 and the second height adjustment hole 55 in the second angle member 53 are different from those in the first embodiment. The second angle member 53 includes a first flat plate part 53a and a second flat plate part 53b extending in the vertical direction so as to form an L-shape in a plan view, and a plurality of first height adjustment holes 54 are provided in the first flat plate part 53a, and a plurality of second height adjustment holes 55 are provided in the second flat plate part 53b.

[0049] The first height adjustment hole 54 and the second height adjustment hole 55 provided in the second angle member 53 according to the fourth embodiment are disposed in the same positions as those in the first embodiment, but the shape is an elongated hole extending in the vertical direction, and the upper and lower ends of the elongated hole are semicircular. The shapes of the first height adjustment hole 54 and the second height adjustment hole 55 may be different from each other as long as the tool 27 (see FIG. 4) can be inserted therein, such as a circle or a triangle, instead of a diamond or an elongated hole. Preferably, the first height adjustment hole 54 and the second height adjustment hole 55 have a shape that tapers toward the top. By having such a tapered shape, the tool 27 is guided when the middle part of the tool 27 is brought into contact with the upper end of the first height adjustment hole 54 or the second height adjustment hole 55, and after the contact, the tool 27 is prevented from shifting in the width direction of the first height adjustment hole 54 or the second height adjustment hole 55.

[0050] Next, a fifth embodiment of the present invention will be described with reference to Fig. 8. In the description, configurations common to the first embodiment will be denoted by the same reference numerals and description thereof will be omitted. Fig. 8 is a perspective view showing an upper portion of a support column 62 in an anchor bolt support device 61 according to the fifth embodiment. The anchor bolt support device 61 according to the fifth embodiment differs from the first embodiment in the shape and number of the first height adjustment hole 54 and the second height adjustment hole 55 in the second angle member 53, and in the support structure of the anchor bolt 4 by the support column 62.

[0051] The second angle member 63 includes a first flat plate portion 63a and a second flat plate portion 63b that extend in the vertical direction so as to form an L-shape in a plan view, and a plurality of (five in the illustrated example) first height adjustment holes 64 are provided in the first flat plate portion 53a, and a plurality of (four in the illustrated example) second height adjustment holes 65 are provided in the second flat plate portion 63b. The first height adjustment holes 64 and the second height adjustment holes 65 have a shape obtained by cutting the shape of an athletics track in half so as to be perpendicular to the long axis, or a semi-elliptical shape. The first height adjustment holes 64 and the second height adjustment holes 65 are formed so that the curved portion of the semicircle or semi-ellipse faces upward, so that they are tapered toward the top. The first height adjustment holes 64 and the second height adjustment holes 65 are arranged alternately with a vertical shift and at regular intervals from each other.

[0052] A steel plate 66 is fixed to the upper end of the second angle member 63 by welding. The steel plate 66 is arranged so that its main surface is perpendicular to the extending direction of the support portion 62. Two through holes (not shown) are provided in the steel plate 66, and the lower end of the anchor bolt 4 is inserted into the through hole of the steel plate 66. Two nuts 17 are screwed into the lower end of the anchor bolt 4 so as to sandwich the steel plate 66 from above and below, thereby fixing the lower end of the anchor bolt 4 to the steel plate 66. Since two anchor bolts 4 are attached to one support portion 62, the anchor bolt support device 61 including four support portions 62 can support eight anchor bolts 4. The steel plate 66 also functions as a fixing plate for the anchor bolts 4.

[0053] The steel plate 66 is configured so that each anchor bolt 4 is arranged on a rectangular line connecting the four support parts 62 in a plan view. When horizontally extending reinforcing bars are arranged to extend in two directions, vertically and horizontally, perpendicular to each other in a foundation concrete (not shown) in which the anchor bolt support device 61 is embedded, the anchor bolt support device 61 does not interfere with the arrangement of these reinforcing bars by arranging the anchor bolts 4 in this manner. In other words, if the anchor bolt support device 61 is arranged so that the line connecting two adjacent support parts 62 is parallel to the vertical or horizontal direction, and if the reinforcing bars in the two directions, vertically and horizontally, are arranged to avoid the support parts 62, the reinforcing bars arranged directly above them will naturally be arranged to avoid the anchor bolt 4.

[0054] Next, a sixth embodiment of the present invention will be described with reference to Fig. 9. In the description, configurations common to the fifth embodiment will be denoted by the same reference numerals and description thereof will be omitted. Fig. 9 is a front view showing an upper portion of a support part 72 in an anchor bolt support device 71 according to the sixth embodiment. The anchor bolt support device 71 according to the sixth embodiment differs from the fifth embodiment in the fixing means of the anchor bolts 4 to the support part 72 and the number of fixed bolts.

[0055] The support column 72 of the anchor bolt support device 71 includes a first angle member 10, a second angle member 63, and an anchor bolt fixing nut 73 fixed to the upper end of the second angle member 63 by welding. The lower end of the anchor bolt 4 is screwed into the anchor bolt fixing nut 73. The anchor bolt fixing nut 73 is fixed to the upper end of the second angle member 63 so that the part of the anchor bolt 4 located below the anchor bolt fixing nut 73 is positioned on the inner surface side of the second angle member 63. One anchor bolt fixing nut 73 and one anchor bolt 4 are attached to one support column.

[0056] Since the anchor bolt 4 is attached to the second angle iron 63 via the anchor bolt fastening nut 73 fixed to the upper end of the second angle iron 63, the length of the overlapping portion between the anchor bolt 4 and the second angle iron 63 can be made shorter than in the case where a bent bolt 14 (see FIG. 3) is used. This prevents the anchor bolt 4 from covering the first and second height adjustment holes 64, 65, making it impossible to insert the tool 27 (see FIG. 5) into the first and second height adjustment holes 64, 65.

[0057] Although the description of the specific embodiment is finished above, the present invention is not limited to the above embodiment and modified examples, and can be widely modified and implemented. The support column part may further include other members such as long members extending in the vertical direction between the base part and the first angle member, or between the second angle member and the anchor bolt. In order to fix the second angle member to the first angle member by a fastener, a long hole may be provided in the first angle member, and a through hole aligned with the long hole may be provided in the second angle member. Each support column part may support one fixing plate via a long member or the like, and one fixing plate may be connected to multiple anchor bolts so that each support column part can support multiple anchor bolts. In the third embodiment, instead of providing a screw hole in the steel plate member, a round hole may be provided in the steel plate member, and a nut may be fixed to the steel plate member by welding or the like so as to be aligned with the round hole. The second to fifth embodiments may be combined with each other. [Explanation of symbols]

[0058] 1, 31, 41, 51, 61, 71: Anchor bolt support device 2: Basic surface 3: Base section 4: Anchor bolt 5,32,42,52,62,72: Support section 10: First angle bar 11, 43, 53, 63: Second angle iron 11a, 43a, 53a, 63a: 1st flat plate part 11b, 43b, 53b, 63b: 2nd flat plate part 22: Long hole 23, 54, 64: First height adjustment hole 24, 55, 65: Second height adjustment hole 25:Through hole 26: Fasteners 73: Anchor bolt fastening nut

Claims

1. An anchor bolt support device that is erected on a foundation surface to support an anchor bolt in a predetermined position, comprising: A base portion fixed to the foundation surface; a support portion provided on the base portion and supporting the anchor bolt at an upper end thereof, The support portion includes a first angle member extending in a vertical direction and a second angle member extending in the vertical direction and overlapping an upper end portion of the first angle member at a lower end portion thereof, One of the upper end of the first angle member and the lower end of the second angle member has a long hole extending in the vertical direction, and the other of the upper end of the first angle member and the lower end of the second angle member has a through hole aligned with the long hole, and the first angle member and the second angle member are fixed to each other by fasteners inserted into the long hole and the through hole, The second angle member includes a first flat plate portion and a second flat plate portion extending in the vertical direction and intersecting each other to form an L-shape in a planar view, a plurality of first height adjustment holes which penetrate the first flat plate portion and are aligned with each other in the vertical direction, and a plurality of second height adjustment holes which penetrate the second flat plate portion and are aligned with each other in the vertical direction, and the first height adjustment holes and the second height adjustment holes are arranged alternately with their upper ends offset from each other in the vertical direction, in this anchor bolt support device.

2. The anchor bolt support device according to claim 1 , wherein upper portions of the first height adjustment hole and the second height adjustment hole are tapered upward.

3. The anchor bolt support device according to claim 2 , wherein each of the first height adjustment hole and the second height adjustment hole forms a rhombus with one diagonal line extending in the up-down direction.

4. The anchor bolt support device according to claim 1 , wherein the first height adjustment hole and the second height adjustment hole have the same shape and are disposed at regular intervals from each other.

5. 2. The anchor bolt support of claim 1, wherein the lower end of the second angle overlaps an inner surface of the outer surface of the upper end of the first angle.

6. 6. The anchor bolt support device as described in claim 5, wherein the first height adjustment hole is arranged on the second flat plate portion side of the long hole or the through hole provided in the first flat plate portion, and the second height adjustment hole is arranged on the first flat plate portion side of the long hole or the through hole provided in the second flat plate portion.

7. 2. The anchor bolt support device according to claim 1, wherein the support portion further includes an anchor bolt fastening nut fixed to an upper end of the second angle member and into which a lower end of the anchor bolt is screwed.

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