JP2022063067A - Method for manufacturing column base reinforcement block, column base reinforcement block, and metal hanger - Google Patents

Abstract

To provide a column base reinforcement block, a method for manufacturing a column base reinforcement block, and a metal hanger which can secure positional accuracy of an anchor bolt from manufacture to installation.SOLUTION: A method for manufacturing a column base reinforcement block including a column base reinforcement structure having main reinforcements 11 and auxiliary stirrups 12 arranged so as to extend in a direction crossing the longitudinal direction of the main reinforcements 11, first shape holding fixtures 13 for positioning the main reinforcements 11, a plurality of anchor bolts 20 fixed to the first shape holding fixtures 13, and a template 21 fixed to one ends 20a of the plurality of anchor bolts 20 includes: an anchor bolt installation step of fixing the template 21 to a jig 80, and installing the plurality of anchor bolts 20 so as to extend upward from the jig 80; a fixture mounting step of fixing the first shape holding fixtures 13 to the other ends 20b of the plurality of anchor bolts 20; and a bar arrangement step of fixing the main reinforcements 11 to the first shape holding fixtures 13, and fixing the auxiliary stirrups 12 to the main reinforcements 11.SELECTED DRAWING: Figure 2

Description

The present invention relates to a pre-assembled column base reinforcing bar block used for a column base of a building, and relates to a method for manufacturing the column base reinforcing bar block, a structure of the column base reinforcing bar block, and a hanging metal fitting used for moving the column base reinforcing bar block. ..

Conventionally, as a foundation column base on which anchor bolts are erected, there is known one constructed by assembling a column base reinforcing bar structure composed of main bars and hoop bars on waste concrete and then placing concrete. When the foundation column base is constructed by this method, the period of foundation work becomes long because it takes time to assemble the reinforcing bar structure on the discarded concrete.

Therefore, there is known a column base reinforcing bar block that shortens the period for constructing the column base reinforcing bar structure by assembling the column base reinforcing bar structure in advance to form a column base reinforcing bar block and discarding the column base reinforcing bar block and installing it on concrete. (For example, see Patent Document 1).

Japanese Unexamined Patent Publication No. 2019-056284

According to the column base reinforcing bar block disclosed in Patent Document 1, one end of an anchor bolt is fixed to a fixing plate provided on a main bar position holding plate fixed to an intermediate portion in the longitudinal direction of the main bar. Anchor bolts are arranged so as to protrude from the upper end of the column base reinforcing bar block. The template is fixed to the other end of the anchor bolt protruding from the upper end of the column base reinforcing bar block.

The column base reinforcing bar block is assembled at a manufacturing site different from the installation site, and when transported to the manufacturing site, the anchor bolts may be transported with the anchor bolts oriented horizontally in the longitudinal direction. Anchor bolts are used to fix columns in buildings, and are made of rods that are thicker than the main bars that make up the column base reinforcing bars, and templates are fixed to the ends. Therefore, when the column base reinforcing bar block is laid on its side, one end of the anchor bolt is fixed to the main bar position holding plate and the anchor bolt is in a cantilevered state. Therefore, the column base reinforcing bar block has a problem that an impact during transportation is applied, the main bar position holding plate is deformed, and the accuracy of the position of the anchor bolt cannot be ensured.

The present invention solves the above problems, and is a method for manufacturing a column base reinforcing bar block, a column base reinforcing bar block, and suspension that can ensure the position accuracy of anchor bolts from manufacturing to installation. The purpose is to provide metal fittings.

The method for manufacturing an anchor bolt block according to the present invention includes a column base reinforcing bar structure including a main bar and ribs arranged so as to extend in a direction intersecting the longitudinal direction of the main bar, and a first shape holding for positioning the main bar. A method for manufacturing a column base reinforcing bar block comprising a metal fitting, a plurality of anchor bolts fixed to the first shape holding metal fitting, and a template fixed to one end of the plurality of anchor bolts. Anchor bolt installation process in which the template is fixed to a jig and the plurality of anchor bolts are installed so as to extend upward from the jig, and the first shape holding metal fitting is attached to the other end of the plurality of anchor bolts. It is provided with a metal fitting attachment step for fixing and a bar arrangement step for fixing the main bar to the first shape holding metal fitting and fixing the rib bar to the main bar.

The column base reinforcing bar block according to the present invention has a column base reinforcing bar structure having main bars and ribs arranged inside the foundation column base, a first shape holding metal fitting for positioning the main bar, and the first shape holding metal fitting. The main bar is provided with a plurality of anchor bolts fixed to the anchor bolt and a template fixed to one end of the anchor bolt installed so as to project one end from the end of the column base reinforcing bar structure. Is composed of threaded reinforcing bars having male threads formed on the outer peripheral surface.

The hanging metal fitting according to the present invention includes a metal fitting body having a female screw formed on the inner surface of the tubular body, and an annular portion rotatably fixed to the metal fitting body.

According to the present invention, the template attached to one end of the anchor bolt is placed and fixed on the jig, and the column base reinforcing bar block is installed upside down from the case where the column base reinforcing bar block is installed. Build a leg reinforcement block. Therefore, since the reinforcing bar structure of the column base reinforcing bar block can be constructed with reference to the anchor bolt having high strength, the accuracy of the column base reinforcing bar block is improved. Further, since it can be assembled in a state of being stably fixed to the jig, the assembly work of the column base reinforcing bar block becomes easy, and the deformation of each member in the manufacture of the column base reinforcing bar block can be suppressed.

It is a perspective view of the column base reinforcing bar block which concerns on Embodiment 1. FIG. It is a schematic diagram explaining the manufacturing method of the column base reinforcing bar block 100 which concerns on Embodiment 1. FIG. It is a perspective view of the column base reinforcing bar block 100 shown in FIG. 2 (a). It is a perspective view of the manufacturing process of the column base reinforcing bar block 100 which concerns on Embodiment 1. FIG. It is a side view of the state just before lifting the column base reinforcing bar block 100 which concerns on Embodiment 1. FIG. It is a side view in the process of lifting and rotating the column base reinforcing bar block 100 which concerns on Embodiment 1. FIG. It is a perspective view of the hanging metal fitting 50 which concerns on Embodiment 1. FIG. It is sectional drawing of the hanging metal fitting 50 which concerns on Embodiment 1. FIG. It is a figure at the time of transporting the column base reinforcing bar block 100 which concerns on Embodiment 1. FIG.

Hereinafter, preferred embodiments of the column base reinforcing bar block manufacturing method, the column base reinforcing bar block, and the hanging metal fittings of the present invention will be described in detail with reference to the drawings. Since the embodiments described below are suitable specific examples of the present invention, various technically preferable limitations are attached, but the scope of the present invention is particularly limited to the present invention in the following description. Unless otherwise stated, the present invention is not limited to these aspects.

Embodiment 1.
FIG. 1 is a perspective view of a column base reinforcing bar block according to the first embodiment. In FIG. 1, the column base reinforcing bar block 100 is a reinforcing bar fixed on the waste concrete 90 and the lower end of the column of the building is fixed to secure the strength of the foundation column base, and the anchor bolt 20 is positioned at a predetermined position. It is for installation in.

The column base reinforcing bar block 100 is fixed to the column base reinforcing bar structure 10 which is a reinforcing bar for reinforcing the foundation column base, a plurality of anchor bolts 20 fixed to the column base reinforcing bar structure 10, and the tips of the plurality of anchor bolts 20. The template 21 and the template 21 are provided. The plurality of anchor bolts 20 are erected on the upper surface of the foundation column base to fix the columns of the building. The template 21 is for positioning the plurality of anchor bolts 20 with each other. In the first embodiment, the plurality of anchor bolts 20 are provided at four locations, but the present invention is not limited to these, and the number of anchor bolts 20 to be installed can be changed as appropriate. Further, the shape of the template 21 can be appropriately changed according to the arrangement and quantity of the plurality of anchor bolts 20.

The column base reinforcing bar block 100 is installed by holding the lower end portion of the main bar 11 on the foot metal fitting 30 arranged on the waste concrete 90. The foot metal fitting 30 is provided with a holding hole on the upper surface for inserting the lower end portion of the main bar 11. A height adjusting metal fitting 17 is attached to the lower end of the main bar 11. The height adjusting metal fitting 17 adjusts the amount in which the lower end portion of the main bar 11 is inserted into the holding hole, and in the first embodiment, it is a nut screwed into the main bar 11. The nut screwed into the main bar 11 is rotated and moved in the longitudinal direction of the main bar 11 to adjust the position. The height adjusting metal fitting 17 may be fixed to the foot metal fitting 30 by welding, or may be fixed by fastening a nut. The specific configuration of the foot fitting 30 can be changed as appropriate, but each is configured so that the height position of the main bar 11 can be changed. In the column base reinforcing bar structure 10, when viewed from a direction perpendicular to the plane of the waste concrete 90, the main reinforcing bars 11 whose longitudinal direction is directed in the vertical direction are arranged in a rectangular shape. In the main bars 11 arranged in a rectangular shape, long main bars 11a are arranged at the four corners, and short main bars 11b shorter than the long main bars 11a are arranged between them. The long main bar 11a and the short main bar 11b are arranged so that their upper ends are aligned in the height direction. The foot fitting 30 is attached to the lower end of the long main bar 11a.

(Column base reinforcing bar structure 10)
The column base reinforcing bar structure 10 includes rib bars 12 extending horizontally so as to surround the main bars 11. The rib muscle 12 is also called a hoop muscle. The rib muscle 12 is formed in a rectangular shape when viewed from above. The rib muscle 12 extends in a direction intersecting the longitudinal direction of the main muscle 11, more specifically, in a direction orthogonal to the longitudinal direction, and is fixed to the main muscle 11 by a binding line or the like. A plurality of rib muscles 12 are arranged in the longitudinal direction of the main muscle 11.

Further, a first shape holding metal fitting 13 is arranged at an intermediate portion in the vertical direction of the column base reinforcing bar structure 10. The first shape holding metal fitting 13 has an X-shape when viewed from above, and includes four arm portions 13a extending from the center toward the four corner portions of the main bar 11 arranged in a rectangular shape. The four long main bars 11a are fixed to the first shape holding metal fitting 13 at the tips of the four arm portions 13a and are positioned. The long main bar 11a is a threaded reinforcing bar in which a screw is formed on the outer peripheral surface. The long main bar 11a is fixed to the first shape holding metal fitting 13 by the nut 14. The nut 14 is screwed into the long main bar 11a and fastened so as to sandwich the first shape holding metal fitting 13 from above and below.

Of the main bars 11, the long main bar 11a is a threaded reinforcing bar, but the short main bar 11b does not have to be composed of a threaded reinforcing bar, and is made of a deformed steel bar or the like. Further, the short main bar 11b may be made of a steel bar thinner than the long main bar 11a.

The rib muscle 12, also called a hoop muscle, surrounds the main muscle 11 from the outside and is arranged. The rib muscles 12 extend in a direction orthogonal to the longitudinal direction of the main muscles 11 and are formed in a rectangular ring shape according to the arrangement of the plurality of main muscles 11. The rib bar 12 is made of a steel bar thinner than the main bar 11. Further, a plurality of rib muscles 12 are arranged along the longitudinal direction of the main muscle 11, are arranged at substantially equal intervals, and are fixed to the main muscle 11 by a binding line or the like.

The column base reinforcing bar structure 10 is constructed by assembling a rod-shaped steel material into a rectangular tubular shape. The first shape holding metal fitting 13 is fixed to the middle portion of the tubular shape in the axial direction. Further, the column base reinforcing bar structure 10 is provided with a second shape holding metal fitting 15 at an end portion on the side of the discarded concrete 90. Like the first shape holding metal fitting 13, the second shape holding metal fitting 15 has an X-shape when viewed from above, and is centered toward the four corners of the main bar 11 arranged in a rectangular shape. It comprises four arms 15a extending from. In the second shape holding metal fitting 15, a long main bar 11a is fixed to the tips of the four arm portions 15a using nuts 14. The second shape holding metal fitting 15 determines the position of the long main bar 11a in the lower part of the column base reinforcing bar structure 10. The first shape holding metal fitting 13 and the second shape holding metal fitting 15 fix the relative positions of the long main bars 11a arranged at the four corners of the main bars 11 arranged in a rectangular shape. In the first embodiment, the first shape holding metal fitting 13 and the second shape holding metal fitting 15 have an X-shaped shape, but the shape is not limited to this shape, and the shape is rectangular, for example, in a plan view. Other shapes such as can be taken.

(Anchor bolt 20)
As shown in FIG. 1, the anchor bolt 20 is attached to the first shape holding metal fitting 13 arranged in the vertical intermediate portion of the column base reinforcing bar structure 10. The anchor bolt 20 is arranged inside the main bar 11, and one end portion 20a projects upward from the column base reinforcing bar structure 10. The other end 20b of the anchor bolt 20 is fixed to the first shape holding metal fitting 13 with a nut 14. Anchor bolts 20 have male threads formed at the ends 20a and 20b, and nuts 14 and 24 can be screwed into the anchor bolts 20. The first shape holding metal fitting 13 is located between two nuts 14 screwed into the end portion 20b of the anchor bolt 20. The anchor bolt 20 is fixed to the first shape holding metal fitting 13 by fastening the nut 14.

The template 21 is fixed to the end portion 20a of the anchor bolt 20. The template 21 is rectangular in a plan view, and the ends 20a of the four anchor bolts 20 are fixed to the four corners 21a by using nuts 24, respectively. The relative positions of the end portions 20a of the anchor bolts 20 are fixed by the template 21. The number of anchor bolts 20 can be changed as appropriate. For example, in the column base reinforcing bar block 100, two anchor bolts 20 may be arranged at each of the four corners of the template 21, and a total of eight anchor bolts 20 may be installed. The shape of the template 21 can be appropriately changed depending on the arrangement and number of anchor bolts 20.

(Manufacturing method of column base reinforcing bar block 100)
FIG. 2 is a schematic diagram illustrating a method for manufacturing the column base reinforcing bar block 100 according to the first embodiment. FIG. 3 is a perspective view of the column base reinforcing bar block 100 shown in FIG. 2 (a). FIG. 2 schematically shows the structure of the column base reinforcing bar block 100, and is partially omitted.

First, the anchor bolt installation process will be described with reference to FIGS. 2 (a), 2 (b) and 3. The column base reinforcing bar block 100 is assembled on the jig 80. In the first embodiment, the jig 80 is made of H-shaped steel having an H-shaped cross section. The jig 80 is arranged on the iron plate 82 so that the upper surface 80a is horizontal. The jig 80 may be configured by arranging two H-shaped steels or C-shaped steels side by side according to the size of the template 21 of the column base reinforcing bar block 100 to be assembled. As shown in FIG. 2A, the template 21 is placed on the upper surface 80a of the jig 80 and fixed by using the clamp 81 so as not to move. The clamp 81 is fixed so as to sandwich the flange portion 80b of the jig 80 and the template 21. As shown in FIG. 3, the clamp 81 may be installed at two or more positions symmetrical with respect to the center of the template 21.

The template 21 is formed with a hole 21b through which the anchor bolt 20 is inserted. The anchor bolt 20 is inserted into the hole 21b and fastened and fixed by the nut 24. The nut 24 is fastened and fixed so as to sandwich the template 21. At this time, as shown in FIG. 1, the tip surface 20c of the anchor bolt 20 is adjusted so as to form substantially the same surface as the end surface 24c of the nut 24. When all the necessary anchor bolts 20 are attached to the template 21, the anchor bolt installation process is completed.

Next, the metal fitting mounting process will be described with reference to FIG. 2 (c). The first shape holding metal fitting 13 is fixed to the end portions 20b of the plurality of anchor bolts 20 extending upward from the template 21. First, the nut 14 is screwed into the end portions 20b of the plurality of anchor bolts 20 in the state of FIG. 2B. The fixing plate 16 is placed on the nut 14, and the first shape holding metal fitting 13 is placed on the fixing plate 16. The positions of the fixing plate 16 and the first shape holding metal fitting 13 may be turned upside down. Further, the shape of the fixing plate 16 can be changed as needed, and the fixing plate 16 can be omitted.

The height position of the first shape holding metal fitting 13 is determined by adjusting the position of the lower nut 14 before fastening the upper nut 14 of the first shape holding metal fitting 13 in FIG. 2 (c). The position of the nut 14 may be adjusted before the fixing plate 16 and the first shape holding metal fitting 13 are assembled.

After that, by fastening the nut 14 on the upper side of the first shape holding metal fitting 13 in FIG. 2C, the position of the first shape holding metal fitting 13 is determined, and the metal fitting mounting process is completed.

FIG. 4 is a perspective view of the manufacturing process of the column base reinforcing bar block 100 according to the first embodiment. FIG. 4 shows a state after the rib bar 12 is attached to the long main bar 11a and before the short main bar 11b is attached. Subsequently, the bar arrangement process will be described with reference to FIGS. 2 (d) to 2 (f) and FIG.

With the first shape holding metal fitting 13 installed on the anchor bolt 20, the long main bar 11a is inserted into the main bar insertion hole 13b (see FIG. 4) provided at the tip of the arm portion 13a of the first shape holding metal fitting 13. It is fixed by the nut 14. The long main bar 11a is a threaded reinforcing bar in which a male thread is formed on the outer peripheral surface, and the nut 14 can be installed at an arbitrary position in the longitudinal direction. The nut 14 is fastened so as to sandwich the first shape holding metal fitting 13 from the vertical direction, and fixes the first shape holding metal fitting 13 to the long main bar 11a.

The bundle 18 of the lower ribs 12 shown in FIG. 2D is placed on the jig 80. The bundle 18 of the ribs 12 may be arranged at least before fixing the long main bar 11a to the first shape holding metal fitting 13. Further, after the long main bar 11a is fixed to the first shape holding metal fitting 13, the bundle 19 of the upper rib bars 12 is arranged on the upper side of the first shape holding metal fitting 13. These steps are called a rib muscle temporary placement step. In the first embodiment, since the rib bar 12 is a rectangular ring, for example, it is difficult to arrange the bundle 18 on the jig 80 with the long main bar 11a fixed to the first shape holding metal fitting 13. Therefore, it is advisable to temporarily place it in advance as described above. The same applies to the bundle 19.

Next, the second shape holding metal fitting 15 is installed at the upper end of the long main bar 11a. Before attaching the second shape holding metal fitting 15 to the long main bar 11a, the nut 14 is passed through the long main bar 11a in advance to adjust the height position. The second shape holding metal fitting 15 is fixed to the long main bar 11a by passing the long main bar 11a through the main bar insertion hole 15b provided at the tip of the arm portion 15a and fastening the second shape holding metal fitting 15 between the nuts 14 from the vertical direction. To.

After the second shape holding metal fitting 15 is fixed to the long main bar 11a, the rib bar 12 temporarily placed in advance is moved to a predetermined position in the longitudinal direction of the long main bar 11a and fixed by using a binding line or the like. .. Further, as shown in FIG. 2 (f), a rib bar 12 is also arranged above the second shape holding metal fitting 15, and is fixed by using a binding line or the like. The long main bar 11a may be marked in advance at a position where the rib bar 12 is fixed. When the rib bar 12 is fixed, the column base reinforcing bar structure 10 is in the state shown in FIG. Then, the short main bar 11b is attached to the plurality of ribs 12 of the column base reinforcing bar structure 10 shown in FIG. 4 by a binding wire. When the short main bar 11b is fixed to the rib bar 12, the bar arrangement process is completed.

Further, as shown in FIG. 2 (f), a height adjusting metal fitting 17 for discarding the column base reinforcing bar block 100 and placing it on the foot metal fitting 30 on concrete is attached to the upper end of the long main bar 11a. This is called the adjustment metal fitting mounting process. The height adjusting metal fitting 17 may be replaced with, for example, a nut 14 as long as the height direction is determined when the column base reinforcing bar block 100 is placed on the foot metal fitting 30. The steps shown in FIGS. 2 (d) to 2 (f) may be carried out in a state where the column base reinforcing bar block 100 is removed from the jig 80 and the column base reinforcing bar block 100 is placed on the iron plate 82.

FIG. 5 is a side view of the state immediately before lifting the column base reinforcing bar block 100 according to the first embodiment. FIG. 6 is a side view in the middle of lifting and rotating the column base reinforcing bar block 100 according to the first embodiment. Next, the hanging metal fitting installation process and the lifting process will be described with reference to FIGS. 5 and 6.

Since the column base reinforcing bar block 100 is assembled in the steps shown in FIGS. 2 (a) and 2 (f), the column base reinforcing bar block 100 is upside down from the used state in the assembled state. Therefore, it is necessary to lift the column base reinforcing bar block 100 and reverse the direction in the vertical direction at least once.

As shown in FIG. 5, in the lifting process, the hanging metal fittings 50 are first attached to the upper ends and the lower ends of the long main bar 11a. In the first embodiment, the hanging metal fittings 50a and 50b attached to the upper ends of the long main bars 11a are attached to all four long main bars 11a. However, as long as it can be lifted stably, the number of hanging metal fittings 50 on the upper end side may be four or less. However, in consideration of the weight of the column base reinforcing bar block 100, it is necessary to attach the hanging metal fitting 50 so that the hanging metal fitting 50 will not be damaged or come off from the long main bar 11a when it is lifted.

In the first embodiment, at least two hanging metal fittings 50c attached to the lower end of the long main bar 11a are attached. As shown in FIG. 6, the hanging metal fitting 50 at the lower end is attached to a long main bar 11a constituting a surface that is turned up when the column base reinforcing bar block 100 is rotated. In the first embodiment, the hanging metal fittings 50 at the lower end are attached to two adjacent long main bars 11a. The process of fixing the hanging metal fitting 50 to the upper end and the lower end of the main bar 11 is called a hanging metal fitting installation process.

As shown in FIG. 5, a load is initially applied to the hanging metal fittings 50a and 50b when the jig 80 is lifted upward from above. After the column base reinforcing bar block 100 is separated upward from the jig 80, the hanging metal fitting 50c at the lower end is moved upward, and is moved above the hanging metal fitting 50b at the upper end. In FIG. 6, the hanging metal fittings 50b and 50c are located at the same height. In this state, a load is applied to the wire 84 connected to the hanging metal fitting 50b and the wire 86 connected to the hanging metal fitting 50c, and no load is applied to the wire 85 connected to the hanging metal fitting 50a. .. In this state, the hanging metal fitting 50a is removed, and the mounting position is changed as shown by the hanging metal fitting 50d in FIG. 6B. From the state of FIG. 6B, by pulling up the wires 86 and 87 so that the hanging metal fittings 50c and 50d are loaded, the column base reinforcing bar block 100 is rotated so that the template 21 comes upward. The hanging metal fitting 50b may be removed when no load is applied to the wire 84.

(Hanging bracket 50)
FIG. 7 is a perspective view of the hanging metal fitting 50 according to the first embodiment. FIG. 8 is a cross-sectional view of the hanging metal fitting 50 according to the first embodiment. FIG. 7 is a perspective view showing a state in which the hanging metal fitting 50 is attached to the end of the long main bar 11a. The hanging metal fitting 50 is used for moving the column base reinforcing bar block, and has a metal fitting main body 51 which is a tubular body and has a female screw formed on the inner surface thereof, and an annular portion 52 through which wires 84, 85, 86 or 87 are passed. A rod-shaped member 53 for attaching the annular portion 52 to the metal fitting body 51 is provided. In the first embodiment, the metal fitting body 51 is a tubular body having a hexagonal outer peripheral surface. However, the metal fitting body 51 may be formed with two planes facing each other on the outer peripheral surface so that the metal fitting body 51 can be rotated by using a tool such as a spanner even if it is not hexagonal.

As shown in FIG. 8, the annular portion 52 is connected to the metal fitting body 51 by penetrating the rod-shaped member 53 through the tip of the U-shaped part and the metal fitting body 51. The annular portion 52 is rotatably connected to the metal fitting body 51. The rod-shaped member 53 has a screw formed at the tip 53a, is screwed with a female screw provided at the tip of the annular portion 52, and is formed so as not to be easily disengaged from the annular portion 52. The annular portion 52 and the metal fitting body 51 may be connected by another connecting structure as long as they are rotatable.

As shown in FIG. 8, the female screw formed on the inner surface of the metal fitting body 51 is screwed with the long main bar 11a on which the male screw is formed. The length B at which the metal fitting body 51 swallows the long main bar 11a is preferably equal to or larger than the diameter dimension d of the long main bar 11a. The larger the length B, the safer the work can be without coming off during lifting. Since the hanging metal fitting 50 can be connected to the long main bar 11a by a screw, the operator can easily attach the hanging metal fitting 50 to the column base reinforcing bar block 100 by hand. Further, since the hanging metal fitting 50 is connected to the long main bar 11a by a screw, it does not easily come off when it is lifted. As shown in FIG. 7, the metal fitting body 51 is screwed with the long main bar 11a so that when the load of the column base reinforcing bar block 100 is applied, the meshing length of the screw that can support the load can be obtained. Is formed in. That is, the metal fitting body 51 is preferably formed so as to have a length of about 5 to 15 times the diameter dimension d of the long main bar 11a.

(Column base reinforcing bar block 100 to which the anchor bolt restraining member 70 is attached)
FIG. 9 is a diagram of the column base reinforcing bar block 100 according to the first embodiment at the time of transportation. 9 (b) is a cross section of the SS portion of FIG. 9 (a). The column base reinforcing bar block 100 has a structure in which the template 21 is attached to the anchor bolt 20, and is a cantilever with the first shape holding metal fitting 13 as a fixed end. The column base reinforcing bar block 100 is laid on its side and transported by a truck or the like in a state as shown in FIG. 9A. At this time, since the anchor bolt 20 and the template 21 have relatively large masses, the first shape holding metal fitting 13 which is the fixed end of the cantilever structure may be deformed.

Therefore, in the first embodiment, the anchor bolt restraining member 70 is attached to the end portion of the column base reinforcing bar block 100 on the template 21 side of the column base reinforcing bar structure 10. The anchor bolt restraining member 70 is formed so as to engage with the rib bar 12 at the end portion of the column base reinforcing bar structure 10. As shown in FIG. 9B, the anchor bolt restraining member 70 includes a straight portion 73 extending in the horizontal direction and the vertical direction when the column base reinforcing bar block 100 is laid on its side. The anchor bolt restraining member 70 restricts the horizontal and vertical movement of the anchor bolt 20 at the intersection 72 of the two straight portions 73, that is, the movement in the direction orthogonal to the longitudinal direction of the anchor bolt 20.

Anchor bolt restraining member 70 is attached to the column base reinforcing bar block 100 according to the first embodiment at least during transportation. As a result, the anchor bolt 20 is supported by the first shape holding metal fitting 13 and the anchor bolt restraining member 70, and the position of the anchor bolt 20 does not change even during transportation. That is, since the column base reinforcing bar block 100 can be transported while maintaining the accuracy when assembled at a place other than the site where the column base reinforcing bar block 100 is installed, the column base reinforcing bar block 100 can maintain high quality. The anchor bolt restraining member 70 has a structure in which the anchor bolt restraining member 70 is locked and detachable by hooking the locking portion 71 on the rib bar 12, but the anchor bolt restraining member 70 may be fixed to the column base reinforcing bar structure 10 by another fixing method. good. Further, the anchor bolt restraining member 70 may be joined by welding or the like at the end of the manufacturing process.

Further, the anchor bolt restraining member 70 can also be used in a step of rotating the column base reinforcing bar block 100 so as to turn it upside down by using the hanging metal fittings 50 shown in FIGS. 7 and 8. When the column base reinforcing bar block 100 is lifted and rotated by using the hanging metal fitting 50, the first shape holding metal fitting 13 may be deformed due to the influence of gravity applied to the anchor bolt 20 in the cantilever state. However, by installing the anchor bolt restraining member 70 at the end of the column base reinforcing bar structure 10 and supporting the anchor bolt 20, the column base reinforcing bar block 100 suppresses defects such as deformation even in the process of rotating. Can be done.

With the above, the present invention can accurately assemble the column base reinforcing bar block of the pre-assembled method, and can suppress the deterioration of quality due to deformation or the like even during transportation.

10 Column base reinforcing bar structure, 11 main bar, 11a long main bar, 11b short main bar, 12 rib bar, 13 first shape holding metal fitting, 13a arm, 13b main bar insertion hole, 14 nut, 15 second shape holding metal fitting, 15a arm Part, 15b Main bar insertion hole, 16 fixing plate, 17 Adjusting bracket, 18 bundle, 19 bundle, 20 anchor bolt, 20a end, 20b end, 21 template, 21a corner, 21b hole, 21c tip surface, 24 nut, 24c end face, 30 foot metal fittings, 50 hanging metal fittings, 50a hanging metal fittings, 50b hanging metal fittings, 50c hanging metal fittings, 50d hanging metal fittings, 51 metal fitting body, 52 annular part, 53 rod-shaped member, 53a tip, 70 anchor bolt restraint member, 72 intersection , 73 Straight part, 80 jig, 80a top surface, 80b flange part, 81 clamp, 82 iron plate, 84 wire, 85 wire, 86 wire, 90 discarded concrete, 100 bolt base reinforcing bar block.

Claims (8)

A column base reinforcing bar structure having a main bar and ribs arranged so as to extend in a direction intersecting the longitudinal direction of the main bar, a first shape holding metal fitting for positioning the main bar, and a first shape holding metal fitting fixed to the first shape holding metal fitting. A method for manufacturing a column base reinforcing bar block comprising a plurality of anchor bolts and a template fixed to one end of the plurality of anchor bolts.
Anchor bolt installation process in which the template is fixed to a jig and the plurality of anchor bolts are installed so as to extend upward from the jig.
A metal fitting mounting step of fixing the first shape holding metal fitting to the other end of the plurality of anchor bolts, and
A method for manufacturing a column base reinforcing bar block, comprising a bar arrangement step of fixing the main bar to the first shape holding metal fitting and fixing the rib bar to the main bar. A hanging metal fitting installation process for fixing a hanging metal fitting having a female screw and an annular portion to the upper end and the lower end of the main bar, and
Further provided with a lifting step of passing a wire through the hanging metal fitting and lifting the column base reinforcing bar block by the wire.
The lifting process is
The column base according to claim 1, wherein the hanging metal fitting fixed to the lower end of the main bar is moved to the same height as or higher than the hanging metal fitting fixed to the upper end of the main bar, and the column base reinforcing bar block is rotated. Reinforcing bar block manufacturing method. The column base reinforcing bar according to claim 1 or 2, further comprising an attachment step of attaching an anchor bolt restraining member that restrains the displacement of the anchor bolt to the end portion of the column base reinforcing bar structure on the side where the template is arranged. How to make blocks. Column base reinforcing bar structure with main and rib bars arranged inside the foundation column base,
The first shape holding metal fitting for positioning the main bar,
A plurality of anchor bolts fixed to the first shape holding metal fitting,
A template, which is fixed to one end of the anchor bolt installed so as to project one end from the end of the column base reinforcing bar structure, is provided.
The main line is
A column base reinforcing bar block composed of threaded reinforcing bars with male threads formed on the outer peripheral surface. The column base reinforcing bar block according to claim 4, further comprising an anchor bolt restraining member for restraining a displacement in a direction orthogonal to the longitudinal direction of the plurality of anchor bolts. The anchor bolt restraining member is
The column base reinforcing bar block according to claim 5, which is detachably configured with respect to the column base reinforcing bar structure. The metal fitting body with female threads formed on the inner surface of the cylinder,
A hanging metal fitting including an annular portion rotatably fixed to the metal fitting body. The annular portion is
It is formed by inserting and fixing a rod-shaped member to the two tips of the U-shaped metal fitting.
The rod-shaped member is
The hanging metal fitting according to claim 7, which penetrates the metal fitting body.

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