JP2832669B2 - Reinforcement method for concrete structure and curved surface forming machine used in the method - 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 for arranging reinforcing bars in a concrete structure and a curved surface forming machine used in the method.

[0002]

2. Description of the Related Art Conventionally, tunnel arches, inverts,
As a method of building a concrete structure having curved surfaces such as circular pillars of civil engineering and civil engineering and building structures, a number of reinforcing bars are prepared at a factory, and each reinforcing bar is cut or bent to a predetermined shape. The reinforcing bar formed into a predetermined shape is carried to a construction site of a concrete structure, the reinforcing bars are combined at a predetermined pitch interval, and the intersections and ends of the reinforcing bars are bound by binding wires to form a frame material. After that, a concrete structure was constructed using the frame material as a core material.

[0003]

However, according to the above-mentioned conventional method of constructing a concrete structure, the frame is assembled by using a large number of single reinforcing bars at the construction site. There is a problem that the quality of the framing material is affected by the required skill of the reinforcing steelwork and the skill of the reinforcing steelwork. The present invention has been made in view of such circumstances, and is not limited to skilled reinforcers, it is possible to arrange rebar in a short construction period, and furthermore, to a reinforcement method for a concrete structure in which the quality of a framed material is stable and the method. It is an object to provide a curved surface forming machine to be used.

[0004]

According to the present invention, there is provided a semiconductor device comprising:
The method for arranging reinforcing bars of a concrete structure according to the present invention is to form a flat rebar metal mesh formed by crossing and joining a plurality of vertical rebars and horizontal rebars at a factory, and forming the rebar metal net into a curved metal net by bending the rebar metal net using a curved surface forming machine. Then, the curved wire mesh is transported to a construction site, and the curved wire mesh is connected to each other to perform a predetermined reinforcing arrangement. When a roll-type bending machine having a plurality of lower rolls is used, and when the flat-type rebar wire mesh is bent by the roll-type bending machine, a neighboring roll substantially parallel to the axis of the upper roll and the lower roll is used. A large number of dummy reinforcing bars having substantially the same diameter as the horizontal reinforcing bars are placed between the matching horizontal reinforcing bars to form the curved wire mesh. Further, the curved surface forming machine according to claim 2 is a curved surface forming machine that has an upper roll and a lower roll and that bends a reinforcing steel wire mesh formed by a vertical reinforcing bar and a horizontal reinforcing bar,
Outside the upper roll or the lower roll, a plurality of storage grooves into which horizontal reinforcing bars of the reinforcing steel wire mesh are fitted are formed along the circumferential direction at a predetermined pitch. Here, the storage groove formed in the upper roll or the lower roll of the curved surface forming machine may be directly formed on the surface of the upper roll or the lower roll, or separately manufacture an attachment in which the storage groove is formed, The attachment may be attached to the outside of the upper roll or the lower roll.

[0005]

In the method for arranging reinforcing bars of a concrete structure according to the first aspect, a flat reinforcing steel wire mesh is joined in advance at a factory by crossing a plurality of vertical reinforcing bars and horizontal reinforcing bars, and the reinforcing steel wire mesh is formed into a curved surface. A predetermined bending is performed by a machine to form a curved metal net. Then, the curved wire mesh is transported to the construction site of the concrete structure, and the curved wire meshes are connected to each other, so that accurate bending can be performed in a factory, and these are arranged at predetermined positions and connected at the site. Since it is only a skill, no skill is required and the construction can be completed in a short time. Then, when bending a flat rebar wire mesh with a curved surface forming machine,
Since a large number of dummy rebars having substantially the same diameter as the horizontal rebar are placed between the horizontal rebars substantially parallel to the axis of the upper roll and the lower roll to form the curved wire mesh, the force of the upper roll is reduced by the horizontal rebar and It is transmitted to the vertical reinforcing bar through the dummy reinforcing bar. Thus, it is possible to perform stable bending on the vertical reinforcing bar that intersects with the horizontal reinforcing bar without applying a local load to the vertical reinforcing bar. In the curved surface forming machine used for the concrete structure reinforcing arrangement method according to claim 2, a plurality of storage grooves into which horizontal reinforcing bars are fitted along the circumferential direction are formed outside the upper roll or the lower roll,
Since the horizontal reinforcing bar fits into the storage groove, the force of the upper roll and the lower roll does not act on the horizontal reinforcing bar but acts only on the vertical reinforcing bar, so that the vertical reinforcing bar can be smoothly bent.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will now be described with reference to the accompanying drawings to provide an understanding of the present invention. Here, FIG. 1 is a schematic configuration diagram of a roll portion of a curved surface forming machine used in a concrete structure reinforcing method according to a first embodiment of the present invention, and FIG. 2 is used in a concrete structure reinforcing method. Plan view of a curved surface forming machine, FIG. 3 is an explanatory diagram showing a radius of curvature of a curved metal net subjected to bending, FIG. 4 is an explanatory diagram showing a method of connecting the curved metal nets, and FIG. FIG. 6 is a plan view of a frame material for a column base completed by the reinforcing method of the concrete structure, and FIG. 7 is a plan view of a frame material for the column base completed by the reinforcing method of the concrete structure. FIG. 8 is a plan view of the completed waterway frame material, FIG. 8 is a schematic configuration diagram of a roll portion of a curved surface forming machine used in a method of arranging reinforcing bars for a concrete structure according to a second embodiment of the present invention, and FIG. Partial side view of the molded attachment, 10 is a schematic view of a roll portion curved molding machine to be used for reinforcement construction method of the concrete structure according to a third embodiment of the present invention.

A method of arranging reinforcing bars for a concrete structure according to a first embodiment of the present invention will be described below together with the configuration of a curved surface forming machine used in the method. As shown in FIGS. 1 to 4, in the method of arranging reinforcing bars for a concrete structure according to the first embodiment of the present invention, a plurality of vertical reinforcing bars 10 and horizontal reinforcing bars 11 are crossed in advance in a factory, and the crossing portion is formed. Are joined by welding or the like to form a flat rebar wire mesh 12. Then, the end of the vertical reinforcing bar 10 of the reinforcing metal wire mesh 12 is bent upward using a pressing means such as a press, for example, and the lower roll 14 on the exit side of the curved surface forming machine 13 is bent.
The reinforcing wire mesh 12 is smoothly guided between the upper roll 15 and the upper roll 15. Then, the reinforcing wire mesh 12 is inserted between the lower roll 14 and the upper roll 15 on the entrance side of the curved surface forming machine 13 composed of a roll type bending machine, and the cylinder 16 is operated to move the upper roll 15 up and down to adjust the position. , Reinforcing wire mesh 1
2 can be bent with a predetermined radius of curvature. Then, the upper roll 15 is rotated counterclockwise, and the pair of lower rolls 14 is rotated clockwise to bend the rebar wire mesh 12. At this time, the dummy reinforcing bar 17 is placed on the vertical reinforcing bar 10 between the horizontal reinforcing bars 11, and about 65% to 85%
% Is filled with the dummy reinforcing bar 17. This bending is performed, for example, as shown in FIG.
In, an arc of an angle α ° is drawn with R1 having a small radius of curvature with the center at P, and in a predetermined section B, an arc of Q is drawn with a center at an angle β and a radius of curvature R2, and in a predetermined section C, The position of the upper roll 15 is adjusted so that an arc of an angle θ ° is drawn at R3 having a large radius of curvature with the center at S.

Under the pressing force of the upper roll 15 set as described above, a bending process is continuously performed on the rebar wire mesh 12 to manufacture a curved wire mesh 18. In the process of bending the vertical reinforcing bars 10, since a large number of dummy reinforcing bars 17 are placed between the horizontal reinforcing bars 11, the horizontal reinforcing bars 11 are also provided at the portions of the vertical reinforcing bars 10 where the horizontal reinforcing bars 11 are not provided. The same pressing force is applied to the joined portions, so that the vertical rebar 10 can be smoothly bent. According to the above method, a plurality of curved wire meshes 18 corresponding to the shape of the frame material used for the concrete structure,
19 is manufactured. In addition, the dummy reinforcing bar 17 is the reinforcing wire mesh 1
After the bending process is performed on 2, it is moved backward and reused, so that it is not necessary to prepare a large amount of dummy reinforcing bars 17.

As shown in FIGS. 4 and 5, curved metal nets 18 and 19 subjected to various bending processes overlap the binding portions 20 at the ends of the vertical reinforcing bars 10, and connect the overlapped portions of the vertical reinforcing bars 10 to wires. It is bound by the binding wire 21. By repeating this process, the frame member 22 for a tunnel shown in FIG. 5 can be easily completed in a short period of time without using a particularly skilled reinforcer. In addition, the quality is stable because the curved wire meshes 18 and 19 are formed at the factory. If a concrete structure is constructed using the frame material 22 for a tunnel, an excellent tunnel can be completed. Further, as the framing material formed by the above method, as shown in FIGS. 6 and 7, a substantially rectangular column-base framing material 23 having a rounded corner as shown in FIG. The material 24 is completed by using the curved wire meshes 25 and 26. Reference numeral 27 denotes a binding portion of the column base frame material 23, and reference numeral 28 denotes a binding portion of the waterway frame material 24.

Next, a method for arranging bars in a concrete structure according to a second embodiment of the present invention will be described. The reinforcement arrangement method for a concrete structure according to the second embodiment of the present invention is a reinforcement arrangement method in which the horizontal reinforcing bar 11 is fixed below the vertical reinforcing bar 10 as shown in FIG. Regarding the rebar arrangement method, first, a curved surface forming machine used in the method will be described. As shown in FIGS. 8 and 9, the curved surface forming machine used in the concrete structure reinforcing method according to the second embodiment includes:
A cylindrical forming attachment 29 is attached to the outside of the lower roll 14 of the curved surface forming machine 13 used for the concrete structure reinforcing method according to the first embodiment. Three storage grooves 30 are formed outside the molded attachment 29. The storage groove 30 is formed substantially parallel to the axis of the molded attachment 29, and has a cross-sectional shape in a U-shape in which the width is horizontally long and the depth is slightly larger than the diameter of the horizontal reinforcing bar 11. This is because even if there is a slight error in the pitch between the horizontal reinforcing bars 11, when the lower roll 14 rotates, the error is absorbed or functions as an allowance, and further, excessive shearing during bending is performed. Care is taken to prevent the force from acting on the vertical reinforcing bar 10. In this embodiment, the storage groove 30 is used.
Was formed to a diameter of about 2 to 3 times the diameter of the horizontal reinforcing bar 11.

Next, a method of arranging a reinforcing bar for a concrete structure using the curved surface forming machine will be described. Similar to the arranging method of the first embodiment, the end of the vertical reinforcing bar 10 of the reinforcing steel wire mesh 31 is bent and the outlet is formed. The reinforcing wire mesh 31 is smoothly guided between the lower roll 14 and the upper roll 15 on the side. Then, the upper roll 15 is raised and lowered to a predetermined height and set, a radius of curvature and a rotation angle value of a predetermined section of the rebar wire mesh 31 are determined, and the horizontal reinforcing bar 11 is further fitted into the storage groove 30 of the forming attachment 29. The starting position is adjusted by rotating the lower roll 14. After that, the upper roll 15 and the lower roll 14 are rotated to manufacture the curved wire netting in the same manner as in the case of manufacturing the curved wire netting of the first embodiment. In this manufacturing process, even if there is some error in the pitch interval between the horizontal reinforcing bars 11,
0 is formed wide and deep, so that in the process of bending the vertical reinforcing bar 10, the horizontal reinforcing bar 11 fits into the storage groove 30, and no bending load acts on the vertical reinforcing bar 10, and a high-quality curved metal net is formed. Can be manufactured. In the case of bending to a different radius of curvature in a predetermined section of the rebar wire netting 31, the upper roll 15 is raised and lowered to set a predetermined radius of curvature as described in the first embodiment. The plurality of curved metal nets formed as described above are carried to the site and used for constructing the frame material as in the first embodiment.

Next, a method of arranging reinforcing bars for a concrete structure according to a third embodiment will be described after the configuration of a curved surface forming machine used in the method is described. As shown in FIG. 10, the curved surface forming machine used in the third embodiment of the present invention includes:
A cylindrical forming attachment 33 in which four storage grooves 32 are formed is attached to the upper roll 15 of the curved surface forming machine 13 shown in FIG. 2, and a receiving table 35 is disposed in the middle of the pair of lower rolls 14. I have. The storage groove 32 has a horizontally long U-shaped cross section similarly to the storage groove 30 of FIG. 9, and is formed so that the horizontal reinforcing bar 11 is fitted smoothly. The upper surface of the cradle 35 is formed with a bent curved surface in which the middle portion is depressed, and the end of the vertical reinforcing bar 10 is bent upward. Next, a method of arranging reinforcing bars for a concrete structure according to a third embodiment will be described. The method of setting the upper roll 15 so that the reinforcing metal wire mesh 34 has a predetermined radius of curvature is described in the first embodiment. The description is omitted because it is the same as that of the device 13. First, the rotation start position of the upper roll 15 is adjusted so that the horizontal reinforcing bar 11 fits into the storage groove 32 of the forming attachment 33 at the time of rotation. Then, a reinforcing wire mesh 34 is inserted between the lower roll 14 and the upper roll 15 on the entrance side of the curved surface forming machine, the end of which is placed on an arc-shaped receiving base 35, the upper roll 15 is lowered, and the end bending is performed. Do. Thereafter, the upper roll 15 and the lower roll 14 are rotated to perform the above-described bending. The plurality of curved metal meshes formed by the above method are carried into a construction site of a concrete structure, and are constructed into a predetermined frame material.

Although the embodiment of the present invention has been described above, the present invention is not limited to this embodiment and is included in the present invention unless departing from the gist. For example, although a three-roll system is used for the curved surface forming machine, a four-roll system may be used. Further, in the reinforcing arrangement method according to the third embodiment, a curved surface forming machine provided with the pedestal 35 is used. However, the pedestal 35 may be fixedly provided, or may be arranged so as to be able to move up and down. It may be set. Further, the upper roll 15 is raised and lowered, but only the lower roll 14 is raised and lowered,
Alternatively, both the upper roll 15 and the lower roll 14 may be moved up and down to adjust their respective heights. Finally, the molded attachments 29, 33 are inserted into the storage grooves 30, 3,
Although three or four pieces 2 were used, if the locations of the horizontal reinforcing bars 11 to be joined to the vertical reinforcing bars 10 were different, an arbitrary number of storage grooves corresponding to the locations were formed on the outside. Prepare an attachment and manufacture a curved wire mesh.

[0014]

According to the method for arranging a concrete structure according to the first aspect of the present invention, a curved metal mesh formed in a factory is transported to a construction site of a concrete structure in advance, and the curved metal meshes are interconnected to form a predetermined arrangement. Since the reinforcement is performed, accurate and stable reinforcement can be provided without the need for skilled rebar workers, and the construction period is short, and an excellent concrete structure can be constructed. When bending a flat reinforcing wire mesh, a large number of dummy reinforcing bars are placed between the horizontal reinforcing bars to form a curved wire mesh, so that a stable bending process is applied to the vertical reinforcing bars crossing the horizontal reinforcing bars. And a high quality curved metal net can be formed. In the curved surface forming machine used in the concrete structure reinforcing method according to claim 2, the curved surface forming machine has a plurality of storage grooves into which horizontal reinforcing bars are fitted along the circumferential direction outside the upper roll or the lower roll. So
When bending the reinforcing wire mesh, the shearing force of the horizontal reinforcing bar does not act on the vertical reinforcing bar, and high-quality bending can be performed.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a roll portion of a curved surface forming machine used in a method of arranging a concrete structure according to a first embodiment of the present invention.

FIG. 2 is a plan view of a curved surface forming machine used for a reinforcing arrangement method of the concrete structure.

FIG. 3 is an explanatory diagram showing a radius of curvature of a curved metal net subjected to bending;

FIG. 4 is an explanatory diagram showing a method of connecting curved metal nets to each other.

FIG. 5 is a plan view of a frame material for a tunnel completed by a reinforcing arrangement method of the concrete structure.

FIG. 6 is a plan view of a column base frame material completed by a reinforcing arrangement method for the concrete structure.

FIG. 7 is a plan view of a water channel framing member completed by a reinforcing arrangement method of the concrete structure.

FIG. 8 is a schematic configuration diagram of a roll portion of a curved surface forming machine used in a method of arranging a concrete structure according to a second embodiment of the present invention.

FIG. 9 is a partial side view of a molding attachment of the curved surface molding machine.

FIG. 10 is a schematic configuration diagram of a roll portion of a curved surface forming machine used in a method of arranging reinforcing bars for a concrete structure according to a third embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Vertical reinforcing bar 11 Horizontal reinforcing bar 12 Reinforcing wire mesh 13 Curved surface forming machine 14 Lower roll 15 Upper roll 16 Cylinder 17 Dummy reinforcing bar 18 Curved wire mesh 19 Curved wire mesh 20 Binding part 21 Wire binding wire 22 Tunnel framing material 23 Column base framing material 24 Waterway Frame material 25 Curved wire mesh 26 Curved wire mesh 27 Binding portion 28 Binding portion 29 Molding attachment 30 Storage groove 31 Reinforcing wire mesh 32 Storage groove 33 Molding attachment 34 Reinforcing wire mesh 35 Cradle

──────────────────────────────────────────────────続 き Continuing on the front page (72) Kenji Kurokawa, 2-1-1-18 Higashiko, Kokurakita-ku, Kitakyushu-shi, Fukuoka Prefecture (72) Kunio Ichino, Inventor Kunio Ichino 2-chome, Higashiko, Kitakyushu-shi, Fukuoka No. 1-18 Sumikura Steel Co., Ltd. (72) Taro Kimotsuki Inventor 2-1-1 Higashiko, Kokurakita-ku, Kitakyushu-shi, Fukuoka Prefecture In-house Sumikura Steel Co., Ltd. 2-1-1-18 Sumikura Steel Co., Ltd. (72) Inventor Takashi Bantohira 2-1-1-18 Higashiko, Kokura-Kita-ku, Kitakyushu-shi, Fukuoka Prefecture (56) Reference Sumikura Steel Co., Ltd. JP, A) Japanese Utility Model Showa 50-17542 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) E04C 5/18 B21D 5/14 B21F 33/00

Claims (2)

(57) [Claims] At a factory, a plurality of vertical reinforcing bars and horizontal reinforcing bars are crossed and joined to form a flat reinforcing wire mesh, and the reinforcing wire mesh is bent into a curved wire mesh by a curved forming machine, and then the curved wire mesh is formed. Transporting to a construction site, connecting the curved wire mesh to perform a predetermined reinforcing arrangement, a reinforcing arrangement method of a concrete structure, characterized in that the curved surface forming machine upper roll and a plurality of lower rolls When using a roll-type bending machine having, and when bending the flat reinforcing wire mesh by the roll-type bending machine, between the adjacent horizontal reinforcing bars substantially parallel to the axis of the upper roll and the lower roll. A method of arranging reinforcing bars for a concrete structure, wherein a plurality of dummy reinforcing bars having substantially the same diameter as the horizontal reinforcing bars are placed and the curved wire mesh is formed. 2. A curved surface forming machine having an upper roll and a lower roll for bending a reinforcing steel wire mesh formed by a vertical reinforcing bar and a horizontal reinforcing bar. A curved surface forming machine used in a method of arranging reinforcing bars for a concrete structure, wherein a plurality of storage grooves into which horizontal reinforcing bars of the reinforcing steel wire mesh are inserted are formed at a predetermined pitch.