JP2819528B2 - How to install rebar - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of installing a reinforcing bar for installing a main reinforcing bar for a precast beam member or the like installed on a column or the like under construction.

[0002]

FIG. 13 is a perspective view showing a precast beam member, FIG. 14 is a perspective view showing another precast beam member different from the precast beam member shown in FIG. 13, and FIGS. FIG. 18 is a perspective view showing one step of constructing a column-beam structure using the precast beam members shown in FIGS. 13 and 14, and FIG. 18 is a perspective view showing a completed column-beam structure.

Conventionally, as shown in FIG. 18, a post-rebar insertion method has been implemented as a method for constructing a beam-to-column structure 3 composed of orthogonal beams 1A and 1B and columns 2 supporting the beams 1A and 1B. . That is, in the conventional rebar insertion method,
First, precast beam members 5A and 5B are manufactured by a PC plant or the like (not shown). The precast beam member 5A is
As shown in FIG. 13, a beam main body 7 made of precast concrete is provided in a form basically constituting the girder 1A, that is, in a form extending in the directions of arrows A and B in FIG. Reference numeral 7 is divided into a plurality of (three or more in FIG. 13 but three or more) main body pieces 7a. Therefore, a beam connection 9 as a gap is formed between the adjacent main body pieces 7a, 7a. A plurality of lower main reinforcements 10 extending in the directions of arrows A and B in FIG. 13 are basically buried on the bottom side inside the beam main body 7. It is buried across a plurality of body pieces 7a so as to pass in the direction B. The beam main body 7 is provided with a plurality of stirrups 11 arranged in the directions of arrows A and B in a form basically buried in each main body piece 7a. An upper portion of the stirrup 11, that is, an inverted U-shaped portion is protruded upward from the outside and is exposed.

Further, the precast beam member 5B is shown in FIG.
As shown in FIG. 14, similarly to the precast beam member 5A, it is divided into a plurality of (only three in FIG. 14, but three or more in FIG. 14) body pieces 7a, and can be divided in the directions of arrows A and B in FIG. It has an elongated beam body 7, and a beam connection 9 as a gap is formed between adjacent body pieces 7a, 7a. Also, at the bottom side inside the beam main body 7, FIG.
A plurality of lower main reinforcements 10 extending in the directions of arrows A and B are basically buried so as to pass through the beam connection portion 9 in the directions of arrows A and B. Wrap 1
1 are buried in such a manner that the upper portions of these stirrups 11 are projected and exposed to the outside. However, the precast beam member 5B further includes a beam joint 9 at the beam joint 9.
A plurality of hoops 12 are arranged in the up and down direction so as to be a hoop for the column 2 corresponding to the column 2. Arrows A,
A plurality of upper main bars 13 extending in the B direction are provided. The upper main reinforcing bars 13 are inserted into a plurality of stirrups 11 protruding toward the upper end of the beam main body 7.
In addition, it is installed so as to pass through the beam connection 9 in the directions of arrows A and B.

[0005] The precast beam members 5A and 5B constructed as described above are manufactured, and reinforcing bars (not shown) are arranged on portions of the columns 2 of the column structure 3 below the large beams 1A and 1B. And formwork 15 is installed as shown in FIG. The installation of the formwork 15 forms a column forming space 16 surrounded by the formwork 15, and a column opening 17 is formed on the upper side adjacent to the column forming space 16. In addition,
A plurality of main pillars 19 in the vertical direction are erected in the pillar joint 17 from the pillar forming space 16 side. No streaks are installed. Next, as shown in FIG. 15, the precast beam member 5A is connected to the upper end side of the column forming space 16 via a support (not shown). The extending direction (directions of arrows A and B) of the precast beam member 5A shown in FIG. 13 is aligned with the horizontal arrow C shown in FIG. 15 so as to be aligned with and overlap with the column connection 17 on the upper side of the space 16. , D direction. That is, the precast beam member 5A is installed on the column 2 under construction. Then, via a support (not shown) or the like, the upper end side of the column forming space 16 is placed as shown in FIG.
As shown in FIG. 3, the precast beam member 5B is connected to the beam forming portion 9 of the precast beam member 5B by the column forming space 16.
14 and the extension direction (arrow A, B direction) of the precast beam member 5B shown in FIG. 14 is aligned with the horizontal arrow E shown in FIG.
It is installed so as to match the direction F (that is, the direction perpendicular to the directions of the arrows C and D). By installation, precast beam members 5
The plurality of hoop bars 12 provided in the beam connection portion 9 of B
Are installed with respect to the plurality of pillar main bars 19 of the pillar connection portion 17.

Next, as shown in FIG. 17, a plurality of upper main reinforcements 13 similar to the upper main reinforcement 13 of the precast beam member 5B are installed on the upper side of the beam main body 7 of the precast beam member 5A. That is, the upper main bars 13 are lifted one by one, for example, in such a manner that the tip 13b of the upper main bar 13 and the end 7b of the precast beam member 5A face in the directions of arrows C and D (for example, by a lifting means such as a crane). (In a state of being overlapped with each other), the upper main reinforcing bars 13 are sequentially moved toward the precast beam member 5A. The upper main bar 13 is moved by moving the upper main bar 13 to the end 7 of the beam main body 7 of the precast beam member 5A on the arrow D side (or arrow C side) in FIG.
From the side b, the upper main reinforcement 13 is inserted into a plurality of stirrups 11 projecting upward from the beam main body 7 in the direction of arrow C (or in the direction of arrow D).
Perform in the form of a pull. As described above, the plurality of upper main reinforcing bars 13 are sequentially moved and are sequentially arranged at predetermined positions on the precast beam member 5A. By the arrangement, the installation of the plurality of upper main bars 13 is completed. After the installation of the upper main reinforcing bar 13 on the precast beam member 5A, an appropriate formwork (not shown) is installed on the column connection 17 overlapping the beam connections 9, 9 of the precast beam members 5A, 5B (further, FIG. , These precast beam members 5
A, a slab 6 made of a precast member is installed so as to be supported by A and 5B), and concrete is poured into and filled in the column forming space 16 and the column connection portion 17 surrounded by the formwork 15, and FIG. As shown in the drawing, the construction of the beam-to-column structure 3 including the girders 1A and 1B and the columns 2 supporting the girders 1A and 1B is completed.

[0007]

However, in the above-described conventional rebar insertion method, the work of positioning the upper main reinforcing bar 13 with respect to the precast beam member 5A is performed by the upper main reinforcing bar 1A.
3 is performed in a form of positioning one by one with respect to the precast beam member, which is a complicated operation. In addition, upper main bar 13
When the positioning is performed with respect to the precast beam member 5A, the upper main reinforcing bar 13 is merely suspended in the air by a lifting means such as a crane, and the position of the upper main reinforcing bar 13 is fixed via a worker's hand or the like. I had no choice. Therefore, the positioning and arranging work of the upper main bar 13 has been difficult. In addition, it has been desired to perform the positioning and placement operation more reliably without intervention of a hand or the like.

In view of the above circumstances, the present invention provides a simple and easy and reliable operation for positioning and positioning a beam main reinforcing bar with respect to a beam member such as a precast beam member.
It is an object of the present invention to provide a method of installing a reinforcing bar that can easily, easily, and surely install a beam main reinforcing bar on a beam member installed on a column or the like under construction.

[0009]

That is, a first aspect of the present invention is a beam member (5A) installed on a column (2) under construction.
When installing the beam main reinforcement (13) in the beam, the beam member (5A)
Another column under construction (2) which is located on the extension of the installation direction (arrows C and D directions) of the main beam reinforcement (13) to be installed on top
The rebar placing means (20) on which the beam main reinforcement (13) is placed horizontally is engaged with the rebar placing means (20).
Mounting direction of the main bar (13) for the beam (arrow C and D directions)
And the installation direction (arrow C, D directions) of the beam main reinforcing bar (13) of the beam member (5A) is positioned so as to be coincident with each other, and the beam main reinforcing bar (13) is positioned by the reinforcing bar mounting means ( 2
0), the beam is horizontally moved toward the beam member (5A), and the beam main bar (13) is moved to a predetermined position above the beam member (5A) by the movement of the beam main bar (13). It is configured to be arranged.

[0010] In a second aspect of the present invention, there is provided the method for installing a reinforcing bar according to the first aspect, wherein:
When moving 3) horizontally from the rebar placement means (20) toward the beam member (5A), a guide cap member (42) is attached to the tip (13b) of the beam main reinforcement (13). Attach and move.

[0011] In a third aspect of the present invention, there is provided the method for installing a reinforcing bar according to the first aspect, wherein the main reinforcing bar for a beam (1) is provided.
When moving 3) horizontally from the rebar placement means (20) toward the beam member (5A), a roller means (43) is installed above the beam member (5A), The main bar (13) is moved by placing the main bar (13) on the roller means (43).

According to a fourth aspect of the present invention, in the reinforcing bar installation method according to the first aspect, the engagement of the reinforcing bar mounting means (20) is to be installed on the beam member (5A). This is performed on a plurality of columns (2, 2) adjacent to each other, which are located on the extension of the installation direction (the directions of arrows C and D) of the main beam reinforcement (13) and are under construction.

According to a fifth aspect of the present invention, in the method for installing a reinforcing bar according to the first aspect, the reinforcing bar mounting means (20) includes a plurality of main bars (13) for the beam and the beam member (20). 5A) A plurality of beam main reinforcements (1
It was placed in a state corresponding to the bar arrangement state of 3).

It should be noted that the numbers in parentheses and the like are for convenience of indicating corresponding elements in the drawings, and therefore, the present description is not limited to the description on the drawings. The same applies to the following “action” column.

[0015]

According to the first aspect of the present invention, the rebar placing means (20) is replaced by the rebar placing means (20).
Is positioned on the rebar mounting means (20) by positioning the mounting direction (arrows C and D directions) of the beam and the installation direction (arrows C and D directions) of the beam member (5A) so as to match. The beam main reinforcement (13) is positioned and arranged with respect to the beam member (5A) where the beam main reinforcement (13) is to be installed. The work of positioning the reinforcing bar mounting means (20) is performed by engaging the reinforcing bar mounting means (20) with the column (2) under construction.

In the second aspect of the present invention, the movement of the beam main reinforcing bar (13) is performed by moving the tip (1) of the beam main reinforcing bar (13).
The guide cap member (42) attached to 3b) is used to reduce the resistance of the obstacle (11) above the beam member (5A) to the main beam reinforcement (13).

In the third aspect of the present invention, the movement of the main beam reinforcement (13) is performed via roller means (43).

In the fourth aspect of the present invention, the position of the reinforcing bar mounting means (20) can be adjusted by engaging the reinforcing bar mounting means (20) with the plurality of columns (2, 2) being constructed. It is fixed at two or more places.

According to a fifth aspect of the present invention, after positioning the reinforcing bar mounting means (20) with respect to the beam member (5A), a plurality of beam main reinforcing bars (13) are attached to the beam member (5A). By simply moving the beam horizontally and stopping at a predetermined position above the beam member (5A), the plurality of beam main reinforcing bars (13) should be arranged in the beam member (5A). It is arranged in a bar arrangement state.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing an example of a reinforcing-bar installation device, and FIG.
Is a view as seen from the direction of the arrow I in FIG. 1, FIG. 3 is a view as seen from the direction of the arrow II in FIG.
Is a sectional view taken along line X1-Y1 of FIG. 2, and FIG. 5 is a sectional view taken along line X2-Y1 of FIG.
FIG. 6 is a cross-sectional view taken along the line Y2, FIG. 6 is a diagram showing a reinforcing bar installation operation performed by the reinforcing bar installation device shown in FIG. 1, and FIG.
8 is an enlarged view of the vicinity of the rebar pressing means of the rebar installation device shown in FIG. 1, FIG. 9 is a cross-sectional view taken along the arrow III of FIG. 8, and FIG. 10 is a cross-section taken along line X4-Y4 of FIG. FIG. 11, FIG.
An enlarged view of the vicinity of the fall prevention means of the reinforcing bar installation device shown in FIG. 1,
FIG. 12 is a horizontal sectional view showing the entire structure, and FIG.
FIG. 14 is a perspective view showing a precast beam member, and FIG.
15 and 17 are perspective views showing another precast beam member different from the precast beam member shown in FIGS.
FIG. 18 is a perspective view showing one step in constructing a column-beam structure using the precast beam member shown in FIG. 4, and FIG. 18 is a perspective view showing a completed column-beam structure. In addition, the beam-column structure in which the beam main reinforcement is installed using the reinforcing-bar installation method of the present invention is the same as the beam-column structure constructed by the conventional rebar insertion method, FIGS. 13 to 18 cited in the section of “Prior Art” are also cited in this embodiment.

As shown in FIG. 12 and FIG. 18, the structure 50 is a structure which is being built upright on the ground (not shown) and is basically made of reinforced concrete and is being constructed. It is a structure used as an equivalent. The structure 50 includes a plurality of pillars 2 and horizontal arrows C and D.
It has a plurality of girders 1A extending in the directions and a plurality of girders 1B extending in the directions of the arrows E and F, which are perpendicular to the directions of the arrows C and D. These pillars 2 and girders 1A, 1B
Are joined to each other in a predetermined column-beam structure such as a ramen structure. These pillars 2 and girders 1A and 1B
A plurality of horizontal slabs 6 (only one is shown by a two-dot chain line in FIG. 18) are supported by the columns 2 and the girders 1A and 1B, and these slabs 6 are arranged in a multilayer shape. . That is, the structure 50 is a structure having a multi-story structure by the slabs 6 arranged in a multi-layer shape. The plurality of girders 1A and 1B of each floor supporting each slab 6 are orthogonally joined to each other as shown in FIG. 12 to form a lattice-shaped beam structure 51. The beam structure 51 is a girder 1
At the intersections 51a of the grids, which are the joining points of A and 1B, they are supported by the columns 2 and joined. Since the structure 50 is under construction as described above, the construction up to the slab 6 (not shown) on the floor on the middle floor is completed, and the slab 6 is supported on the slab 6 from below. As shown in FIG. 1, reinforcing bars (not shown) are provided at positions corresponding to the positions of the plurality of pillars 2 (not shown) in such a manner that these pillars 2 can be extended upward by approximately one floor height as shown in FIG. 1. And the formwork 15 is installed in each of the locations where the arrangement is made. By installing these molds 15, each mold 15
A column forming space 16 is formed inside, and a column connection portion 17 is formed above and adjacent to each column forming space 16.
A plurality of vertical column main reinforcements 19 are erected in each column connection 17 from the column forming space 16 side. No streaks are installed. In addition, a reinforcement (not shown) in the column forming space 16 and a column connection portion 17 above the column forming space 16 are
Since these will be constructed as pillars 2 in the future, these constitute pillars 2 under construction.

At least one pillar 2 of the plurality of pillars 2 being constructed (that is, the pillars 2 are composed of reinforcing bars (not shown) in the pillar forming space 16 and the pillar connection portion 17 above the pillar forming space 16). Is the precast beam member 5 as shown in FIG.
A and 5B are installed. Precast beam member 5A,
5B is configured similarly to that used in the conventional rebar insertion method. That is, the precast beam member 5A
As shown in FIG. 13, is divided into a plurality of main cast pieces 7a made of precast concrete (in FIG. 13, only two are shown for the sake of space, but there are three in this embodiment). It has a beam main body 7 extending in the directions of arrows A and B of 13, and a beam connection portion 9 as a gap is formed between adjacent main body pieces 7a. In addition, a plurality of lower main reinforcements 10 extending in the directions of arrows A and B in FIG. 13 are basically buried at the bottom side inside the beam main body 7 so as to pass through the beam connection 9 in the directions of arrows A and B. Each body piece 7a
A plurality of stirrups 11 are embedded inside the stirrups 11 in such a manner that upper portions of the stirrups 11 project upward and outward. Further, as shown in FIG. 14, the precast beam member 5B has a plurality of precast beam members 5A as shown in FIG.
In FIG. 2, only two are shown due to space limitations.
The main body piece 7a).
It has a beam main body 7 extending in the directions of arrows A and B in FIG. 14, and a beam connection 9 as a gap is formed between adjacent main body pieces 7a. Further, a plurality of lower main reinforcements 10 extending in the directions of arrows A and B in FIG. 14 are basically buried on the bottom side inside the beam main body 7 so as to pass through the beam connection 9 in the directions of arrows A and B. A plurality of stirrups 11 are embedded in each main body piece 7a in such a manner that the upper portions of the stirrups 11 project upward and outward. However, the precast beam member 5B further has a plurality of hoop streaks 12 arranged vertically in the beam joint portion 9 so as to be able to serve as a hoop streak of the column 2 corresponding to the beam joint portion 9. And
Above the beam main body 7 of the precast beam member 5B, a plurality of upper main bars 13 extending in the directions of arrows A and B are provided. The upper main reinforcing bars 13 are inserted in a plurality of stirrups 11 protruding toward the upper end of the beam main body 7 and are installed so as to pass through the beam connection 9 in the directions of arrows A and B. I have.

Therefore, the above-mentioned precast beam member 5A
As shown in FIG. 16, each beam port 9 of the precast beam member 5A is connected to a column port 17 of the column 2 under construction.
13 so that the direction of extension (directions of arrows A and B) of the precast beam member 5A shown in FIG. 13 matches the horizontal directions of arrows C and D shown in FIG. It is installed in a form that is supported by non-supporters. Therefore, in the future, the upper main reinforcement 13 to be installed on the precast beam member 5A should be installed along the directions of arrows C and D, that is, the precast beam member 5A.
The installation direction of the upper main bar 13 of A is in the direction of arrows C and D. Further, the precast beam member 5B described above is arranged such that each beam connection portion 9 of the precast beam member 5B is aligned with and overlaps with the column connection portion 17 of the column 2 under construction. The precast beam member 5B is supported by a not-shown support or the like so that the extending direction (the direction of arrows A and B) of the precast beam member 5B matches the horizontal directions of arrows E and F shown in FIG. As shown in FIG. 16, one of the beam connections 9 of the precast beam member 5B is one of the beam connections 9 of the precast beam member 5A. Therefore, the precast beam members 5A, 5B are orthogonal to each other at these beam connections 9, 9. In addition, as shown in FIG. 1, on the arrow D side of the precast beam member 5A installed on the column 2 under construction,
2, the precast beam members 5A, 5B are not yet installed on the columns 2, 2 under construction.

On the other hand, a reinforcing bar installation device 20 is installed on the precast beam member 5A installed on the column 2 under construction. As shown in FIG. 1, the reinforcing bar installation device 20 has a frame 21 suspended and lifted by a lifting means 40 such as a crane via a plurality of wires 26.
1 is formed to extend in the directions of horizontal arrows C and D.
The length L1 of the frame 21 in the directions of the arrows C and D is represented by an arrow C,
The length is approximately equal to twice the distance P1 between the pillars 2 and 2 being constructed adjacent to each other in the direction D.
As shown in FIG. 8, the rebar sending tip 24, which is the tip on the side, has a top surface 28a facing downward and a contact wall surface 28b facing leftward in FIG. 8 (that is, the direction of arrow C). The formed angle-shaped positioning portion 28 is provided. That is, the reinforcing-bar installation device 20 moves the positioning portion 28 of the frame 21 to the end 7 on the arrow D side of the precast beam member 5A.
(The length of the main body piece 7a closest to the arrow D of the precast beam member 5A is equal to approximately one half of the distance P1.) In the frame 21, two pillar installation portions 2 are arranged in the directions of arrows C and D.
2 are provided, and the interval between the column installation portions 22 in the directions of arrows C and D is substantially equal to the distance P1. The distance between the column installation part 22 on the arrow C side and the end 21b on the arrow C side of the frame 21 and the distance between the column installation part 22 on the arrow D side and the end 21c on the arrow D side of the frame 21 are both set. The distance P1 is approximately half the size of the distance P1.

As shown in FIGS. 2 and 3, each pillar installation portion 22 has positioning holes 22a, 22a vertically penetrated therethrough.
a is provided, and each alignment hole 22a is provided.
Is formed in a rectangular shape having sides extending in directions of arrows C and D and directions of arrows E and F. Each alignment hole 22a
Is longer than the length of the column forming space 16 in the directions of arrows C and D (therefore, the length of the column 2 in the directions of arrows C and D) is L2. The width of the alignment hole 22a in the directions of arrows E and F is the width of the column forming space 16 in the directions of arrows E and F (therefore, the width of the column 2 in the directions of arrows E and F).
The width L3 is substantially equal to the width L3. Each alignment hole 22a
Are provided with a plurality of rod members 23 extending in the directions of arrows C and D. Therefore, in the positioning hole 22a, a plurality of slit holes 2 penetrated in the vertical direction by the rod members 23 are provided.
5 is formed to extend in the directions of arrows C and D. In addition, as shown in FIGS. 4 and 5, a tapered guide surface 22b whose inside expands downward is formed below the alignment hole 22a in each pillar installation portion 22. That is, the reinforcing-bar installation device 20 includes the above-described column installation sections 2
2, the precast beam member 5A as shown in FIG.
Are arranged corresponding to the columns 2 and 2 adjacent to each other and being constructed, which are present on the arrow D side of
The plurality of column main reinforcements 19 in the column connection portions 17 of the columns 2, 2 under construction penetrate through the positioning holes 22a (i.e., the plurality of slit holes 25). That is, the reinforcing-bar installation device 20 is engaged with the columns 2, 2 under construction via the column installation portions 22, 22.

As shown in FIG. 1 to FIG. 3 or FIG. 10 (note that FIG. 10 is shown with the frame 21 omitted) on the frame 21, A plurality (four in the figure) of lower rollers 27 are provided, and each lower roller 27 is formed in a substantially cylindrical shape extending in the directions of arrows E and F, and rotates in the directions of arrows G and H in the figure. It is freely supported. The lower roller 27 is provided with a plurality of constrictions 27a (five in the figure) whose outer diameters are reduced in the axial direction. On these lower rollers 27, a plurality of upper main bars 13 (five in the figure), which are beam main bars, are placed in parallel in horizontal arrows C and D directions. That is, the mounting direction of the upper main reinforcing bar 13 of the reinforcing bar installation device 20 is the direction of the arrows C and D. In addition, each upper main bar 13
Is mounted on each lower roller 27 at the constricted portion 27a. Further, on the frame 21, as shown in FIG. 1 to FIG. 3 or FIG. 10, a position on the arrow C side with respect to the column installation portion 22 on the arrow C side, and the column installation portion 22 on the arrow D side.
Each of the upper rollers 29 is provided at a position on the arrow D side (the number of the upper rollers 29 may be two or more). It is formed in a substantially columnar shape extending in the directions of arrows E and F in substantially the same manner as described above, and is rotatably supported in the directions of arrows G and H in the figure. The upper roller 29 also has a constricted portion 29a whose outer diameter is reduced in the axial direction.
A plurality of locations (that is, five locations in the figure) are provided at positions corresponding to the constricted portion 27a and the directions of the arrows C and D. Each upper roller 29 abuts from above on a plurality of upper main reinforcements 13 placed on the plurality of lower rollers 27, and the contact between each upper roller 29 and each upper main reinforcement 13 is determined by the constricted portion 27a.
It has been done in.

1 and 3 on the frame 21.
Alternatively, as shown in FIGS. 8 and 9, a position on the arrow C side from the column installation portion 22 on the arrow C side, and a position on the arrow C side from the upper roller 29 on the arrow C side (that is, the reinforcing bar sending tip portion). 24) and one drive roller 31 is provided at a position on the arrow D side with respect to the upper roller 29, and each drive roller 31 has a substantially cylindrical shape extending in the directions of arrows E and F. It is formed, and is rotatably supported in the directions of arrows G and H in the figure around the rotation axes CT1 and CT1 extending in the directions of arrows E and F. Each drive roller 31
Is equal to the installation level of the lower roller 27, so that the upper end level of each drive roller 31 is equal to the upper end level of the constricted portion 27a of the lower roller 27. Therefore, each drive roller 31 is in contact with the lower side of the plurality of upper main bars 13 placed on the plurality of lower rollers 27. As shown in FIGS. 1 and 3, the frame 21 is provided with a predetermined drive motor 30, and between the drive motor 30 and each drive roller 31, the power from the drive motor 30 is transmitted. They are connected via a power transmission member 30a such as a flexible chain. Accordingly, the driving of the driving motor 30 causes each driving roller 31 to move in the direction of the arrow G,
It can be driven to rotate in the H direction. Further, the plurality of upper main bars 13 placed on the plurality of lower rollers 27 can be transported in the directions of arrows C and D by the rotational driving of the driving rollers 31 in the directions of arrows G and H. I have. Since the plurality of upper rollers 29 are in contact with the plurality of upper main bars 13 from above, the contact between the plurality of upper main bars 13 and each of the drive rollers 31 maintains a predetermined pressing force. Effectively done in. That is, the conveyance of the plurality of upper main bars 13 by each drive roller 31 is effectively performed.

Further, as shown in FIGS. 1, 3, 8, and 9, the frame 21 is provided with rebar pressing means 32. The rebar pressing means 32 has a base 34 fixedly joined to the frame 21 side.
The operation main body 33 is pivotally connected via the. Operation body 33
Is provided with a shaft member 33b extending in the directions of arrows E and F. A pressing roller 35 formed in a substantially columnar shape is fitted and installed on the shaft member 33b coaxially with the shaft member 33b. I have. The pressing roller 35 is rotatable in the directions of arrows G and H about the shaft member 33b, that is, about the rotation axis CT2 in the figure.
It is slidable in the directions of arrows E and F along b. The operation main body 33 and the base 34 are provided with a predetermined moving mechanism capable of rotating the operation main body 33 with respect to the base 34 around the pin 34a. 1 or 8 in the directions of arrows J and K in FIG. The side of the operation main body 33 opposite to the base 34 is an operation section 33a that can be operated by the operator while holding it by hand. Further, the pressing roller 35 is moved in the directions of arrows E and F along the shaft member 33b, and the pressing roller 35 is moved to an arbitrary upper portion of the plurality of upper main reinforcing bars 13 placed on the plurality of lower rollers 27. The operation unit 3 is selectively associated with the main muscle 13.
The pressing roller 35 is moved by moving the operation body 33 in the direction of the arrow J by operating 3a in the direction of the arrow J in FIG.
It can be pressed against the selected upper main bar 13. A constricted portion 35a having an outer diameter reduced in the axial direction is formed at the center of the pressing roller 35, and the pressing of the upper main bar 13 by the pressing roller 35 is performed in the constricted portion 35a. . Further, the pressing roller 35 is disposed at the rebar sending tip 24, and when the operating body 33 is moved in the direction of arrow J to press the pressing roller 35 against the upper main bar 13, the pressing roller 35 It is located above and close to the drive roller 31 on the side of the rebar delivery tip 24 described above.

Further, near the end on the arrow D side of the frame 21, as shown in FIGS.
6 are provided. One end of the fall prevention means 36 is pivotally attached to the frame 21 side via a pin 37b, and thus has a main body 37 that is rotatable with respect to the frame 21 in the directions of arrows P and Q in the figure. Is provided with an operation section 37a which can be operated by a worker. Also, when the main body 37 is moved to the position indicated by the arrow P, ie, the main body 37 is mounted on the frame 21 while the fall prevention means 36 is mounted thereon. A movement preventing wall portion 39 having a shape capable of preventing the upper main bar 13 from moving in the direction of arrow D is formed so as to be slightly disposed on the arrow D side of the rear end of the upper main bar 13. And a movement prevention ceiling 3 having a shape capable of preventing the vicinity of the rear end of the upper main bar 13 from jumping upward.
9a is formed so as to be arranged slightly above near the rear end of the upper main bar 13. In addition, the main body 37 is indicated by the arrow Q
When it is moved to the side, that is, when the fall prevention means 36 is removed, the movement prevention ceiling 39 a is particularly removed from above the upper main bar 13.

The structure 50 under construction and the reinforcing bar installation device 2
0 and the precast beam members 5A and 5B are configured as described above, so that the construction work of the structure 50 under construction using the reinforcing bar installation device 20 proceeds as follows.
That is, on the uppermost slab 6 where the construction is completed among the structures 50 under construction, reinforcing bars (not shown) for the plurality of columns 2 are provided, and the formwork 15 is installed for each of these reinforcing bars. At least one of the pillars 2 under construction (for example, pillars 2 and 2 corresponding to pillars 2A and 2B adjacent to each other in the directions of arrows C and D shown in FIG. 12) has a precast beam member 5A (for example, FIG. 12). A precast beam member 5A having a length corresponding to the range H1 shown, that is, three main body pieces 7a, the length of the central body piece 7a is substantially equal to the distance P1, and the length of the main body pieces 7a, 7a at both ends Is 2 of the distance P1
One that is approximately equal to one-half, that is, the total length is 2 of the distance P1
Are installed in the directions of arrows C and D. After installing the precast beam member 5A, the precast beam member 5
Pillar 2 under construction with A installed (or pillar 2 under construction with precast beam member 5A installed and other pillar 2 under construction)
The precast beam member 5B (for example, a range H shown in FIG. 12)
2, two precast beam members 5B having a length corresponding to 2, that is, three main body pieces 7a, the length of the central main body piece 7a is substantially equal to the distance P1, and the main body pieces 7a, 7a at both ends are provided.
Is substantially equal to one half of the distance P1, that is, the total length is substantially equal to twice the distance P1) in the directions of the arrows E and F, and thus these precast beam members 5A,
5B is installed so as to be orthogonal. In addition, two columns 2 under construction adjacent to the column 2 on the most arrow D side among the columns 2 under construction on which the precast beam members 5A are installed,
2 (for example, columns 2 corresponding to columns 2C and 2D shown in FIG. 12,
In 2), the precast beam member 5A is not installed.

Next, the reinforcing bar installation device 20 is
To the ground (not shown) via the
A plurality of (five) upper main reinforcements 13 whose lengths are approximately equal to twice the distance P1 are placed on the lower rollers 27 of zero. The upper roller 29 and the reinforcing bar pressing means 32 of the reinforcing bar installation device 20 are detachable from the frame 21 via bolts or the like. Therefore, the upper main bar 13 is easily placed after the upper roller 29 and the reinforcing bar pressing means 32 are removed from the frame 21. When the upper main reinforcement 13 is placed, the main body 37 of the fall prevention means 36 is moved to the arrow Q side so as not to disturb the placing operation of the upper main reinforcement 13. The upper main bar 13 is placed without removing the upper roller 29 and the rebar pressing means 32 from the frame 21, as shown in FIG. 8, by the drive motor 30 and the power transmission member 30 a.
1 and 31 are driven to rotate in the direction of arrow H in the drawing, and the arrow D side (that is, the rear end side) of the upper main bar 13 to be placed is positioned on the drive roller 31 (particularly the drive roller on the side of the rebar feed tip 24). 31), and the upper main bar 13 is conveyed by the drive roller 31 in the direction of arrow D.
3 may be arranged at a predetermined position on the plurality of lower rollers 27.

After the plurality of upper main reinforcing bars 13 are placed on the plurality of lower rollers 27, the reinforcing bar setting device 20 is lifted and transported via the lifting means 40, and the reinforcing bar setting device 20 is connected to the precast beam member 5A. It is positioned and installed with respect to. In addition, at the time of lifting and transporting of the reinforcing bar installation device 20, by keeping the main body 37 of the fall prevention means 36 moved to the arrow P side, the upper main reinforcing bar 13 placed beforehand can be subjected to vibration during transportation. To prevent it from moving in the direction of arrow D and dropping from the frame 21. In addition, it is prevented that the vicinity of the rear end of the upper main bar 13 which is placed as described above is inadvertently jumped upward due to vibration during transportation. In addition, as shown in FIG. 1, the positioning and installation of the reinforcing-bar installation device 20 with respect to the precast beam member 5A is performed by installing the precast beam member 5A in the two alignment holes 22a and 22a of the reinforcing-bar installation device 20. 2, two columns 2 and 2 under construction, which are adjacent to the column 2 closest to the arrow D side on the arrow D side, and thus extend in the directions indicated by the arrows C and D, which are the installation directions of the upper main reinforcement 13 of the precast beam member 5A. The pillar connection portion 17 of the pillars 2 and 2 (for example, the pillars 2 and 2 corresponding to the pillars 2C and 2D shown in FIG. 12) under construction different from the one on which the precast beam member 5A is installed. , 17 through the plurality of pillar main bars 19, that is, the reinforcing bar installation device 20 is
2 to engage the two columns 2, 2 under construction,
The installation direction of the upper main reinforcement 13 of the reinforcing bar installation device 20 and the installation direction of the upper main reinforcement 13 of the precast beam member 5A,
That is, the adjustment is performed in a manner that the directions of the arrows C and D are made to coincide. In the positioning and installation of the reinforcing bar installation device 20 with respect to the precast beam member 5A, the mounting direction and the installation direction are matched with each other, and the positioning portion 28 of the reinforcing bar installation device 20 is positioned at the end of the precast beam member 5A on the arrow D side. 7b. In addition, even after the installation of the reinforcing bar installation device 20 is completed, the lifting support of the reinforcing bar installation device 20 by the lifting means 40 is continued.
By the way, the two alignment holes 22 of the reinforcing bar installation device 20 are provided.
As described above, the tapered guide surfaces 22b, 22b whose insides expand downward as described above are formed below the a, 22a, so that the pillars 2, 2 under construction are aligned with the alignment holes 22a of the frame 21. , 22a, when penetrating upward from the lower side, the upper ends of the columns 2, 2 under construction (that is, a plurality of columns) are formed by the tapered guide surfaces 22b, 22b whose inside expands downward. The column main bar 19) is easily inserted into the alignment holes 22a, 22a.

The rebar installation device 20 is connected to the precast beam member 5.
After installation at A, the rebar installation work is performed. That is, the drive roller 31, the drive motor 30, and the power transmission member 30a
6 is rotated in the direction of arrow G, as shown in FIG.
3 is transported in the direction of arrow C, that is, in the precast beam member 5A side. The upper main bar 13 is transported, and the upper main bar 13 is moved.
From the frame 21 to the precast beam member 5A side, thereby moving the upper main reinforcing bar 13 in the direction of arrow C along the upper side of the precast beam member 5A, and as shown in FIG. It is arranged and installed at a predetermined position above the member 5A. As shown in FIGS. 6 and 7, caps 42, which are an example of a guide cap member and are pointed in the direction of arrow C, are attached to the distal end portion 13b of each upper main bar 13 to be transported. When the upper main bar 13 is moved above the precast beam member 5A by the installation of the cap 42, especially when the upper main bar 13 is moved and inserted into the stirrup 11 above the precast beam member 5A, With the cap 42 attached to the portion 13b, the resistance to the upper main bar 13 received from the stirrup 11 by hitting the stirrup 11 can be reduced. That is, upper main bar 1
The tip portion 13b of the third hardly gets stuck on the stirrup 11 or the like, and the reinforcing bar installation work can be performed more smoothly. The guide cap member has a shape capable of reducing the resistance to the upper main bar 13 received from an obstacle such as the stirrup 11, such as a tip having a rounded tip, in addition to a pointed tip such as the cap 42 of the present embodiment. Anything can be used.

Further, at the time of the rebar installation work, a plurality of substantially cylindrical roller members 43 are previously set as roller means on the upper side of the precast beam member 5A as shown in FIG. 6 and FIG. When the upper main reinforcement 13 is moved in the direction of arrow C along the upper side of the precast beam member 5A by installing the roller members 43, the upper main reinforcement 13 rides on the plurality of roller members 43 and Slides smoothly through. The roller member 43 has both ends (that is, arrows E,
At least one end of each of the F-side ends)
It is preferable that the entire length of the roller member 43 is configured to extend and retract to form a sheath tube that can freely protrude and retract (and that the entire length of the roller member 43 is maintained in an extended state by an appropriate spring or the like). That is, the roller member 43 is connected to the precast beam member 5A.
When the roller member 43 is installed on the upper side or removed from the upper side of the precast beam member 5A, the roller member 43 can be easily installed and removed with the overall length thereof reduced. The above-described cap 42 and roller member 43 are removed after the installation of the upper main reinforcement 13 is completed.

After the installation of the upper main reinforcement 13 on the precast beam member 5A, the precast beam members 5A, 5A and 5B are also applied to the other columns 2 under construction among the structures 50 under construction.
B, etc., and the upper main reinforcing bar 13 is installed on the installed precast beam member 5A via the reinforcing bar installing device 20 in the same manner as described above (or the upper main reinforcing bar 13 is installed by a conventional method). I do.) Next, an appropriate formwork (not shown) is installed for each of the column joints 17 overlapping the beam joints 9, 9 of the precast beam members 5A, 5B,
Precast concrete slabs 6 and the like are installed in such a manner as to be supported by the installed precast beam members 5A and 5B, and concrete is formed in the column forming spaces 16 and the column joints 17 surrounded by the formwork 15 and the like. Fig. 1
8, the girders 1A, 1B and these girders 1A,
The beam-to-column structure 3 composed of the columns 2 supporting the slab 6
Complete the construction in an integrated manner. After that, on the completed slab 6, the column 50 and the slab 6 of the next floor are constructed by the above-described method to construct the structure 50.
To complete.

In the above-described embodiment, as shown in FIGS. 2 and 3, a plurality of upper main reinforcing bars 13 are arranged in the reinforcing bar installation device 20 as the reinforcing bar mounting means in the precast beam member 5A. Since it is placed in a state corresponding to the arrangement state of the plurality of upper main reinforcements 13 (shown in FIG. 17), after the reinforcing-bar installation device 20 is positioned with respect to the precast beam member 5A, as shown in FIG. By simply moving the plurality of upper main reinforcing bars 13 horizontally toward the precast beam member 5A and stopping the movement at a predetermined position above the precast beam member 5A, the plurality of upper main reinforcing bars 13 are moved.
Are arranged in a reinforcing arrangement to be arranged in the precast beam member 5A.

In the above-described embodiment, of the plurality of upper main reinforcements 13 placed on the lower roller 27, the leading end of the upper main reinforcement 13 in the middle of conveyance receives an inadvertent resistance on the precast beam member 5A side and is driven. If the force for conveying the upper main bar 13 by the rollers 31 cannot overcome the resistance, as shown in FIGS.
By moving the pressing roller 35 in the directions of arrows E and F, the pressing roller 35 is opposed to the upper main bar 13 receiving the resistance, and the operating body 33 is moved in the direction of arrow J to move the pressing roller 35. The pressing force between the upper main bar 13 receiving the resistance and the drive rollers 31, 31 is increased by pressing the upper main bar 13 opposed to the upper main bar 13. Increasing the pressing force increases the force for transporting the upper main reinforcement 13 by the drive rollers 31, 31, and continuously transports the upper main reinforcement 13 receiving the resistance in a form that overcomes the resistance. Can be.

In the above-described embodiment, the case where the upper main reinforcing bar 13 is installed on the precast beam member 5A installed on the column 2 under construction has been described. The present invention can also be applied to a case where a beam main reinforcement such as an upper main reinforcement is installed on a cast-in-place cast-in-place concrete beam member. That is, also in this case, the beam main reinforcement such as the upper main reinforcement may be installed on the beam member by using the reinforcing bar mounting means such as the reinforcing bar installation device 20 in the same procedure as in the above-described embodiment.

[0039]

As described above, according to the first aspect of the present invention, the upper main reinforcement is applied to a beam member such as a precast beam member 5A installed on a pillar such as a pillar 2 under construction or a beam member made of cast-in-place concrete. At the time of installing the beam main reinforcement such as 13, the beam main reinforcement to be installed on the beam member is positioned on an extension of the installation direction, such as the arrow C or D direction, of the beam main reinforcement. A reinforcing bar mounting means such as a reinforcing bar setting device 20 on which a main reinforcing bar is horizontally mounted is engaged, and the mounting direction of the main reinforcing bar for the beam of the reinforcing bar mounting device, such as the arrow C and D directions, and the beam member The beam main reinforcement is positioned so as to match the installation direction of the beam main reinforcement, and the beam main reinforcement is horizontally moved from the rebar mounting means side toward the beam member, and the movement of the beam main reinforcement causes the The main beam reinforcement is arranged at a predetermined position above the beam member. . That is, by positioning the reinforcing bar mounting means so that the mounting direction of the reinforcing bar mounting means and the installation direction of the beam member coincide with each other, the beam main reinforcing bar mounted on the reinforcing bar mounting means can It is positioned and arranged with respect to the beam member on which the main reinforcement is to be installed. Therefore, it is not necessary to position the main bars for beams relative to the beam members in such a manner that the main bars for beams are positioned one by one with respect to the beam members. Can be. In addition, the beam member and the column under construction on which the beam member is installed and the column under construction other than the column under construction are mutually fixed in position, so that the column under construction is different from the column under construction. By engaging the reinforcing bar mounting means with the column, the reinforcing bar mounting means is positioned with respect to the beam member. Therefore, the work of positioning the reinforcing bar mounting means in such a manner that the mounting direction of the reinforcing bar mounting means and the installation direction of the beam member coincide with each other is performed by engaging the reinforcing bar mounting means with the column under construction. In other words, by using the column under construction as a guide, it can be performed simply and reliably. In other words, the positioning of the main beams for the beam relative to the beam member can be easily and reliably performed by using the column under construction as a guide. As described above, the positioning and positioning of the beam main reinforcing bar with respect to the beam member is performed simply and easily and reliably, so that the beam main reinforcing bar can be easily and easily installed on the beam member installed on the column or the like under construction. And it can be done reliably

A second aspect of the present invention is the method of installing a reinforcing bar according to the first aspect, wherein the main beam reinforcing bar is horizontally moved from the side of the reinforcing bar mounting means toward the beam member. Since a guide cap member such as a cap 42 is attached to the tip of the beam main bar tip 13b or the like and moved, the beam main bar is moved by the guide cap attached to the tip of the beam bar. The member is used to reduce the resistance of the obstacle above the beam member (for example, the stirrup 11) to the main bar for the beam. Therefore, in addition to the effect of the first invention, the operation of moving the beam main reinforcement horizontally toward the beam member can be performed smoothly,
The work of installing the beam main reinforcement on the beam member can be performed smoothly.

According to a third aspect of the present invention, there is provided the reinforcing bar installation method according to the first aspect, wherein the main beam reinforcing bar is horizontally moved from the side of the reinforcing bar mounting means toward the beam member. A roller means such as a roller member 43 is installed above the beam member, and the movement of the beam main reinforcement is performed in such a manner that the beam main reinforcement is mounted on the roller means. Done smoothly. Therefore, in addition to the effect of the first invention, the work of installing the beam main reinforcement on the beam member can be performed smoothly.

According to a fourth aspect of the present invention, in the method for installing a reinforcing bar according to the first aspect, the engagement of the reinforcing bar mounting means is performed in a direction in which the main reinforcing bar for a beam to be installed on the beam member. Since this is performed on a plurality of columns that are adjacent to each other and are under construction, which are located on the extension, the reinforcing bar mounting unit is configured to match the mounting direction of the reinforcing bar mounting unit with the installation direction of the beam member. The work of positioning is performed by engaging the reinforcing bar mounting means with the plurality of columns under construction. In other words, in addition to the effect of the first invention, since the position of the reinforcing bar mounting means is fixed at a plurality of columns under construction, that is, at two or more positions, the positioning of the reinforcing bar mounting means is performed accurately.

According to a fifth aspect of the present invention, in the method of installing a reinforcing bar according to the first aspect, the reinforcing bar mounting means includes a plurality of main bars for beams, and a plurality of reinforcing bars to be arranged in the beam member. Since it was placed in a state corresponding to the reinforcing state of the beam main reinforcement, after positioning the reinforcing bar mounting means with respect to the beam member, a plurality of beam main reinforcements were moved horizontally toward the beam member, By simply stopping the movement at a predetermined position above the beam member, the plurality of beam main reinforcements are arranged in a reinforcement arrangement to be arranged in the beam member. Therefore, in addition to the effect of the first invention, it is possible to save the trouble of arranging a plurality of beam main reinforcing bars that have been moved to the upper side of the beam member on the beam member in a reinforcing bar arrangement state to be laid. It is convenient.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of a reinforcing-bar installation device.

FIG. 2 is a view on arrow I of FIG. 1;

FIG. 3 is a view taken in the direction of arrow II in FIG. 1;

FIG. 4 is a sectional view taken along line X1-Y1 of FIG. 2;

FIG. 5 is a sectional view taken along line X2-Y2 in FIG. 2;

FIG. 6 is a diagram showing that a reinforcing-bar setting operation is being performed by the reinforcing-bar setting device shown in FIG. 1;

FIG. 7 is a sectional view taken along line X3-Y3 of FIG. 6;

FIG. 8 is an enlarged view of the vicinity of a rebar pressing means of the rebar installation device shown in FIG. 1;

FIG. 9 is a sectional view taken along the arrow III in FIG. 8;

FIG. 10 is a sectional view taken along line X4-Y4 of FIG. 2;

FIG. 11 is an enlarged view of the vicinity of a fall prevention means of the reinforcing-bar installation device shown in FIG. 1;

FIG. 12 is a horizontal sectional view showing the entire structure.

FIG. 13 is a perspective view showing a precast beam member.

FIG. 14 is a perspective view showing a precast beam member different from the precast beam member shown in FIG.

FIG. 15 is a perspective view showing one step in constructing a column-beam structure using the precast beam members shown in FIGS. 13 and 14.

FIG. 16 is a perspective view showing one step in constructing a column-beam structure using the precast beam members shown in FIGS. 13 and 14.

FIG. 17 is a perspective view showing one step in constructing a column-beam structure using the precast beam members shown in FIGS. 13 and 14.

FIG. 18 is a perspective view showing a completed column-beam structure.

[Explanation of symbols]

 2 Column 5A Precast beam member (beam member) 13 Beam main bar (upper main bar) 13b Tip 20 Rebar mounting means (rebar installation device) 42 Guide cap member (cap) 43 Roller means (roller member)

Claims (5)

(57) [Claims] When a main beam for a beam is installed on a beam member installed on a column under construction, when another main beam for a beam which is to be installed on the beam member is located on an extension of the installation direction of the main bar for a beam, The rebar placement means, on which the beam reinforcement is horizontally mounted, is engaged with the column, and the mounting direction of the beam reinforcement of the reinforcement placement means and the installation of the beam reinforcement of the beam member. The main bars for beams are moved horizontally from the rebar placing means side toward the beam members, and the main bars for beams are moved by the movement of the main bars for beams. A method of installing a reinforcing bar configured to be arranged at a predetermined position on the upper side. 2. The method according to claim 2, wherein the main bar for beam is horizontally moved from the reinforcing bar mounting means side toward the beam member, wherein a guide cap member is attached to a distal end portion of the main bar for beam. The method of claim 1, wherein the reinforcing bar is installed. 3. When the main bar for beams is moved horizontally from the side of the rebar placing means toward the beam member, a roller means is provided above the beam member, and the main bars for beam are moved. 2. The method according to claim 1, wherein the main reinforcement for the beam is mounted on the roller means. 4. Engagement of the reinforcing bar mounting means is performed with respect to a plurality of columns adjacent to each other which are located on an extension of the main beam reinforcing bar to be installed on the beam member and are under construction. The method for installing a reinforcing bar according to claim 1, wherein 5. A reinforcing bar mounting means, wherein a plurality of main bars for beams are mounted in a state corresponding to the arrangement of the plurality of main bars for beams to be laid in the beam members. The method for installing a reinforcing bar according to claim 1.