JP2004353314A - Metal fitting for fixing reinforcement, cage spacer, cage and its erecting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a metal fitting capable of firmly and securely fixing a crossing of main reinforcement(bar-shaped rod) of a cage or the like with a reinforcing strip-shaped plate, a spacer for cage, a cage with a highly rigid and a stable quality, using a metal fitting for fixing reinforcements, and erection method of cage excellent in economic efficiency. <P>SOLUTION: The metal fitting 10 for fixing reinforcement is used for fixing a crossing of a bar-shaped reinforcement 1 with a strip-shaped plate 2, and it is positioned to hold the strip-shaped plate 2 between the upper and lower sides and provided with a bar-shaped holding part 3 having a C-shaped notch 3a for inserting the bar-shaped reinforcement and a screw hole plate 4, connecting two bar shaped reinforcement holding parts 3, in which a screw hole 4a for screwing a bolt is formed in order to fasten the crossing of the bar-shaped reinforcement 1 and a strip shaped plate 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a reinforcing bar fixing bracket for assembling a reinforcing bar cage used for reinforcing structures such as cast-in-place piles and underground continuous walls constructed of concrete, a reinforcing bar cage spacer, and a reinforcing bar fixing bar. More specifically, the present invention relates to a reinforcing bar cage and a method of mounting a reinforcing bar cage, and more particularly to a reinforcing bar fixing bracket and a reinforcing bar suitable for fixing the crossing portion between a band-shaped plate and a bar bar for reinforcing a reinforcing bar cage. The present invention relates to a rebar cage using a spacer, a reinforcing metal fitting, and a method of mounting a reinforcing steel cage for repeatedly using a reinforcing metal fitting.
[0002]
[Prior art]
On cast-in-place piles and underground continuous walls constructed of concrete, in order to reinforce the concrete structure, an assembly called a rebar cage formed in a cylindrical shape by combining a large number of rebars in a grid shape. Used.
[0003]
FIG. 5 is an overall view showing an example of the structure of a conventional reinforcing bar cage. As shown in FIG. 5, the reinforcing bar cage 100 generally includes a large number of main bars 101 arranged in the direction of the central axis on the circumference and a large number of hoop bars 102 substantially orthogonal to the main bar 101. The intersection of the main bar 101 and the hoop bar 102 is joined by iron wire binding, welding, or the like. The rebar basket 100 is often large, having a diameter of 0.6 m to several meters, a length of 12 m per basket, and the diameter of the main bar 101 is generally about 19 to 35 mm. Therefore, the weight of the entire rebar basket 100 often becomes extremely heavy.
[0004]
As described above, since the reinforced basket 100 has a heavy overall weight, for example, when it is used for a cast-in-place pile, when a place necessary for assembly can be secured near the laid place of the reinforced basket 100, the reinforced basket 100 is close to the built place. The work method is to assemble, transport to a construction site, lift and build into a drill hole.
[0005]
On the other hand, when a place necessary for assembling cannot be secured, a method of assembling at another place and transporting it to a erection place for erection is adopted. If the rigidity of the reinforced cage 100 is not sufficient in the process of assembling, transporting, and building, when the reinforced cage 100 receives a slight impact during transport or lifting, it loses its shape and becomes unusable. Disappears. Therefore, measures are taken to increase the rigidity of the reinforcing cage 100, and as shown in FIG. 5, a method of reinforcing with the reinforcing members 104 and 105 is employed.
[0006]
A method that does not use such reinforcing members 104 and 105 has also been proposed, and a method of reinforcing the welded portion at the intersection between the main bar 101 and the hoop bar 102 using a special metal fitting (for example, JP-A-7-62650) Gazette) has been proposed.
[0007]
In addition to the above-described reinforcing method, there is a reinforcing method using a belt-like plate.
FIG. 6 is an enlarged perspective view of a main part showing a reinforcing bar cage reinforced by a conventional band-shaped plate.
As shown in FIG. 6, the band-shaped plate 103 is in contact with the main bar 101 from the inside of the reinforcing bar cage 100 and is fixed to the main bar 101 at an intersection with the main bar 101. Usually, the interval between the band-shaped plates 103 is set to about 2 to 3 m. When the band-shaped plate 103 is used for reinforcement, the reason why the band is fixed to the main reinforcing bar 101 from the inside of the reinforcing bar cage 100 is that such a configuration is most effective in improving the rigidity of the reinforcing bar cage 100.
[0008]
The intersection between the main bar 101 and the hoop bar 102 and the intersection between the main bar 101 and the band-shaped plate 103 can be joined by welding. However, joining by welding at a construction site may include variations in welding strength due to seasons and weather, variations due to the skill of a welding technician, and the like, and there is a high possibility that the rigidity of the rebar basket 100 will vary. It has also been pointed out that the strength of the welded portion tends to decrease with the passage of time.
[0009]
Therefore, in order to improve the reliability of joining and fixing the intersections, a method of assembling a reinforcing bar cage using the reinforcing bar fixing fitting 108 shown in FIG. In particular, it is effective to use the reinforcing bar fixing bracket 108 at the intersection between the belt-shaped plate 103 as a reinforcing material and the main bar 101.
[0010]
FIG. 7 is a perspective view showing the reinforcing-bar fixing fitting 108 invented by the inventor first and disclosed in Japanese Patent Application Laid-Open No. 2002-106113. By using the reinforcing bar fixing bracket 108, the main bar 101 and the band-shaped plate (reinforcement ring) 103 can be securely fixed by a simple operation. As shown in FIG. 7, the reinforcing bar fixing bracket 108 is formed by folding the plate-shaped body 109 into a U-shape and forming left and right pieces. A left and right side piece is further extended from the middle part in the length direction to the end of the main bar insertion part to form a protruding piece 110, and a protruding piece 110 is formed. Plate 103) a notch 111 for insertion is provided, and a fixing bolt 112 is screwed into the main bar insertion portion.
[0011]
[Patent Document 1]
JP-A-7-62650 [Patent Document 2]
JP 2002-106113 A
[Problems to be solved by the invention]
The above-described reinforcing bar fixing bracket 108 is capable of securely fixing the intersection between the main bar 101 and the band-shaped plate (reinforcing member, reinforcing ring) 103, and has an excellent characteristic that the reinforcing bar 100 can be effectively reinforced. have. However, as is clear from FIG. 7, the head of the fixing bolt 112 is located outside the rebar cage 100, so that the head of the fixing bolt 112 is embedded in the concrete structure as a concrete reinforcing material. Is thinner than other parts. Therefore, it has been necessary to take measures to reduce the length of the fixing bolt 112 as much as possible. Further, since the main reinforcement 101 is tightened at the distal end of the fixing bolt 112, the contact area between the distal end of the fixing bolt 112 and the main reinforcement 101 is small, and the main reinforcement 101 may be damaged by the fixing bolt 112. there were.
[0013]
The present invention has been made in view of the above problems, and it is possible to firmly and securely fix an intersection between a main reinforcing bar such as a reinforcing bar cage (hereinafter, referred to as a “bar-shaped bar”) and a reinforcing band-like plate, To provide a reinforcing bar fixing bracket that does not damage the main bar and that the head of the bolt is not located outside the reinforcing bar cage, and that the reinforcing bar cage and the inner wall of the excavation hole are used when the reinforcing bar cage is built. Providing spacers that can easily adjust the spacing to a predetermined value and metal fittings that can be easily attached and removed, and rigidity that is assembled using these metal fittings It is an object of the present invention to provide a rebar basket with high quality and stable quality, and to provide a method of building a rebar basket that is excellent in economy.
[0014]
Means and effects for solving the problem
In order to achieve the above object, a metal reinforcing bar (1) according to the present invention is a metal reinforcing bar for fixing an intersecting portion between a bar-shaped bar and a band-shaped plate. And a bolt for screwing the rod-shaped streak having the C-shaped notch for insertion of the bar-shaped streak, and a bolt for connecting the two bar-shaped streak grips and for tightening an intersection between the bar-shaped streak and the band-shaped plate. And a screw hole plate portion in which a hole is formed.
[0015]
According to the rebar fixing metal fitting (1), when fixing the intersection of the bar-shaped bar and the strip-shaped plate, the bar-shaped bar and the bar-shaped bar are held such that the two bar-shaped bar grippers grip the bar-shaped bar. The screw hole plate is fitted into the intersection with the band-shaped plate and set so that the screw hole plate is located inside the band-shaped plate. Then, a bolt is set on the screw hole plate portion, and the crossing portion is fixed by tightening the band-shaped plate with the bolt.
[0016]
Therefore, the head of the bolt is located inside the band-shaped plate wound in a ring shape and does not protrude outside the ring, and the metal fitting for fixing the reinforcing bar is used for a reinforcing bar cage or the like and reinforced with the reinforcing bar cage. When the concrete structure is constructed, the thin portion of the concrete due to the head of the bolt does not occur. In addition, since the strip-shaped plate is pressed against the bar-shaped streaks by the tip end surface of the bolt, there is no risk of damaging the bar-shaped streaks with the bolt, and a high fixing force can be obtained. Furthermore, the metal fittings for fixing the reinforcing bar used for fixing the reinforcing strip at the time of assembling the reinforcing bar cage can be removed at the time of building the reinforcing bar cage and the like, and can be used repeatedly. I have.
[0017]
In addition, the metal reinforcing bar (2) according to the present invention is characterized in that, in the metal reinforcing bar (1), a nut that reinforces the screw hole for screwing the bolt is fixed to the screw hole plate portion. .
According to the reinforcing bar fixing metal (2), the tightening force on the band-shaped plate, that is, the tightening force on the bar-shaped bar and the band-shaped plate can be further increased. In addition, a bolt can be mounted on the nut in advance, and in that state, the bolt can be fitted into the intersection between the bar-shaped streak and the band-shaped plate, so that handleability at a construction site can be improved. Furthermore, the handleability at the time of repeatedly using the reinforcing bar fixing metal can be improved.
[0018]
Further, the metal reinforcing bar (3) according to the present invention is a metal reinforcing bar for fixing an intersection between a bar and a band-shaped plate, the metal bar being positioned vertically sandwiching the band-shaped plate, and inserting the bar-shaped bar. A bar-shaped bar grip having a C-shaped notch for use, and a through-hole for connecting the two bar-shaped bar grips and penetrating a bolt for fastening an intersection between the bar and the band-shaped plate were formed. It is characterized by comprising a connecting plate portion and a nut for screwing the bolt fixed at a position communicating with the through hole of the connecting plate portion.
According to the metal reinforcing bar (3), the same effect as the effect of the metal reinforcing bar (2) can be obtained.
[0019]
Further, a rebar cage spacer (1) according to the present invention is a rebar cage spacer used for building a rebar cage, wherein a bowl-shaped head and one end in a length direction are provided with the above-described one. A shaft portion joined to the inside of the head, a shaft through which the shaft is inserted, and a bearing attached to the reinforcing bar fixing bracket; and a shaft inserted through the shaft, and defining a protruding length of the head from the bearing. And a tubular member.
[0020]
According to the rebar basket spacer (1), the rebar basket spacer can be easily attached to the rebar basket simply by inserting the shaft portion into the bearing. Moreover, by using the tubular member, the length of the head protruding from the reinforcing bar can be easily adjusted.
[0021]
Further, a rebar cage spacer (2) according to the present invention is characterized in that in the rebar cage spacer (1), a plurality of types of tubular members having different lengths are prepared.
According to the rebar cage spacer (2), by selecting and combining the tubular members and inserting the tubular member into the shaft portion, the protruding length of the head from the rebar cage can be easily adjusted in a wide range. be able to.
[0022]
Further, the reinforcing bar fixing metal (4) according to the present invention is the reinforcing bar fixing spacer (1) or (2) according to any of the above-described reinforcing bar fixing metal fittings (1) to (3). The bearing of the spacer is fixed to the rod-shaped stitch holding portion.
According to the rebar fixing metal fitting (4), the bearing is fixed to the bar-shaped bar gripping part, so that the rebar cage spacer (1) or (2) can be extremely easily fixed with the rebar fixing metal. Can be attached to the reinforced cage via
[0023]
Further, the reinforcing bar cage (1) according to the present invention is provided with a plurality of bar-shaped bars arranged around a central axis substantially in parallel with the central axis direction, and arranged in a circumferential direction substantially orthogonal to the central axis. It is a reinforcing bar cage comprising a plurality of hoop bars having a bar-shaped bar and an intersection, and is provided inside the bar-shaped bar, comprising a reinforcing strip having a cross-section with these bar-shaped bars, The intersection between the bar and the hoop is fixed by welding or a clip, and the intersection between the bar and the strip is any one of the reinforcing metal fittings (1) to (4). It is characterized in that it is fastened by metal reinforcing bars.
[0024]
According to the reinforcing bar cage (1), the band-shaped plate as the reinforcing bar is fastened to the bar bar as the main bar by any one of the reinforcing bar fixing brackets (1) to (4). The intersection between the bar and the strip is firmly fixed. Accordingly, the reinforcing effect of the reinforcing bars and the like by the band-shaped plate is extremely high, so that an assembly having high rigidity can be obtained. Further, since the fixing bolt is located inside the steel cage, the bolt head does not protrude outside the outer peripheral portion of the steel cage. Therefore, when a concrete structure is constructed using the reinforcing bar and the like as a reinforcing body, there is no possibility that a thin portion caused by the fixing bolt is generated between the surface of the structural member and the reinforcing bar. Further, since the rod-shaped streaks are not damaged by the fixing bolts, a strong rebar basket can be provided.
[0025]
Further, in the reinforcing rod cage (2) according to the present invention, in the reinforcing rod cage (1), at least four locations per one round of the intersection of the rod-shaped streaks and the band-shaped plate are the reinforcing-bar fixing brackets (4). It is characterized by being fixed by.
According to the rebar cage (2), since the rebar fixing bracket to which the spacer for the rebar cage is attached very easily is used, when the rebar cage is built into the excavation hole, The rebar cage can be built into the excavation hole while attaching a rebar cage spacer that can accurately adjust the interval between the rebar cage and the outer peripheral portion to the set distance. In addition, since the length of the head protruding from the reinforcing bar can be easily adjusted in a wide range, the distance between the inner wall of the excavation hole and the outer peripheral portion of the reinforcing bar can be arbitrarily selected.
[0026]
Further, the method (1) for installing a reinforcing bar cage according to the present invention is characterized in that, when the reinforcing bar cage (1) or (2) is built into an excavation hole, the reinforcing bar fixing the bar-shaped bar and the band-shaped plate. After removing and collecting at least a part of the fixing bracket, the reinforcing bar is inserted into the excavation hole.
According to the method (1) for mounting a reinforcing rod cage, since the metal fittings for fixing the reinforcing rod can be used repeatedly, the assembly cost of the reinforcing rod basket can be reduced.
[0027]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a metal fitting for fixing a reinforcing rod, a spacer for a reinforcing rod cage, a reinforcing rod cage, and a method of mounting a reinforcing rod basket according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing an aspect in which an intersection between a reinforcing bar and a reinforcing member is fixed using the reinforcing bar fixing metal according to the embodiment.
[0028]
As shown in FIG. 1, the objects to be fixed are a bar-shaped bar 1 as a reinforcing bar and a band-shaped plate 2 having a large ring shape (only the vicinity of the fixed portion is shown in FIG. 1) as a reinforcing member. , And the intersection is fixed by the reinforcing bar fixing metal 10.
[0029]
Reinforcing bar fixing bracket 10 is located sandwiching strip-shaped plate 2 in the up-down direction, and has bar-shaped bar gripping portion 3 having C-shaped notch 3a for inserting bar-shaped bar 1, and these two bar-shaped bar gripping portions 3. And a screw hole plate portion 4 for connecting the two. At approximately the center of the screw hole plate portion 4, a screw hole 4a for screwing a bolt 5 for tightening an intersection between the bar-shaped streak 1 and the band-shaped plate 2 is formed.
[0030]
A bearing 6c constituting the reinforcing bar cage spacer 6 is fixed to the upper surface of the rod-shaped muscle gripping portion 3. The reinforcing bar cage spacer 6 has a bowl-shaped head 6a, a shaft 6b having one end in the longitudinal direction joined to the inside of the head 6a, and a shaft 6b inserted therethrough. And a tubular member 6d inserted through the shaft portion 6b and defining the length of the head 6a protruding from the bearing 6c.
[0031]
The reinforcing bar cage spacer 6 can be easily attached to the reinforcing bar fixing fitting 10 simply by inserting the shaft portion 6b into the bearing 6c. Moreover, as the tubular member 6d, a plurality of types of tubular members 6d1, 6d2, 6d3 having different lengths are prepared, and these tubular members 6d1, 6d2, 6d3 are selected, combined and inserted into the shaft portion 6b. The protruding length from the rebar basket 20 can be easily adjusted in a wide range.
[0032]
When the reinforcing bar fixing metal fitting 10 is attached to the intersection between the bar-shaped reinforcing bar 1 and the band-shaped plate 2, and the crossing portion between the bar-shaped reinforcing bar 1 and the band-shaped plate 2 is tightened, the two bar-shaped bar gripping portions 3 of the reinforcing bar fixing metal 10 are used. Is positioned at a position where the bar-shaped strip 1 is gripped with the strip-shaped plate 2 sandwiched in the vertical direction. At this time, it is set so that the screw hole plate portion 4 of the metal reinforcing bar 10 is located inside the band-shaped plate 2 (center side of the ring shape). Next, a bolt 5 is attached to the screw hole 4a of the screw hole plate portion 4, and then the bolt 5 is rotated to tighten an intersection between the band-shaped plate 2 and the bar-shaped streak 1. 2 is fixed.
[0033]
With this fixing, the head of the bolt 5 is located inside the ring-shaped plate 2 and does not protrude outside the band-shaped plate 2. In addition, since the band-shaped plate 2 is pressed against the bar-shaped streak 1 by the “face” of the tip of the bolt 5, a high fixing force can be obtained, and the bar-shaped streak 1 is damaged by the bolt 5. Not even. It is not always necessary to mount the bolt 5 on the screw hole plate 4 in advance, but it is desirable to mount the bolt 5 on the screw hole plate 4 in advance in consideration of workability at the site.
[0034]
The reinforcing bar cage spacer 6 is used for adjusting a distance between an inner wall of the drilling hole and an outer peripheral portion of the reinforcing bar 20 to a set distance, for example, when the reinforcing cage 20 is built in the drilling hole. The distance between the inner wall of the excavation hole and the outer periphery of the rebar cage 20 can be adjusted over a wide range extremely easily by selecting and combining a plurality of types of tubular members 6d1, 6d2, and 6d3 having different lengths and inserting them into the shaft 6b. can do.
[0035]
FIG. 3 is a perspective view showing a configuration of a metal reinforcing bar according to Embodiment (2).
A nut 7 as a screw hole member having a screw hole 7a is joined to the screw hole plate portion 4 of the metal reinforcing bar 30 according to the embodiment (2). By screwing the bolt 5 to the nut 7 and tightening it, the intersection of the bar-shaped streak 1 and the band-shaped plate 2 is fixed.
In this case, it is not necessary to form the screw hole 4a in the screw hole plate portion 4, and an ordinary through hole (not shown) may be formed instead of the screw hole 4a. The nut 7 is joined to the screw hole plate 4 by welding. By employing such a joining method, the nut 7 can be firmly joined to the screw hole plate portion 4 and joining with less variation in joining strength can be performed.
[0036]
4A and 4B are diagrams for explaining the structure of the reinforcing rod cage according to the embodiment of the present invention. FIG. 4A is a partial perspective view of the reinforcing rod cage, and FIG. FIG. 4C is a perspective view of a clip fitting to be used, and FIG. 7C is a perspective view showing a state in which an intersection between a bar-shaped streak and a hoop streak is fixed by the clip fitting.
[0037]
As shown in FIG. 4, in the reinforcing bar cage 20 according to the embodiment, a plurality of hoop bars 8 are wound around a plurality of bar bars 1 which are vertical bars. The respective intersections are assembled by welding or fixed by clip fittings 9. The strip 2 is wound between the plurality of hoops 8 so as to be in contact with the bar 1 from the inside of the reinforcing bar cage 20. It is fixed by any of such reinforcing bar fixing fittings 10, 30 (not shown in FIG. 4).
[0038]
However, it is not necessary that all the intersections between the bar-shaped bars 1 and the strip-shaped plates 2 are fixed by any of the reinforcing-bar fixing brackets 10 and 30 according to the embodiment. Considering this, it is only necessary to determine the intersection using the reinforcing metal fittings 10, 30.
[0039]
FIG. 4B is a perspective view illustrating an example of a clip used to fix an intersection between the bar-shaped streak 1 and the hoop streak 8. The clip metal 9 is not limited to the illustrated embodiment, and may be of any type as long as it can fix the intersection. When the crossing portion is fixed using the clip metal 9 shown in FIG. 4B, the relationship between the bar-shaped streak 1, the hoop muscle 4, and the clip metal 9 is different from that shown in FIG. Become.
[0040]
In the reinforcing bar cage 20 according to the embodiment, since the band-shaped plate 2 as the reinforcing bar is fastened to the bar bar 1 as the main bar by the reinforcing bar fixing metal 10 or 30 according to the embodiment, Is firmly fixed. Therefore, the reinforcing effect of the band-shaped plate 2 is extremely high. Further, since the fastening bolts 5 are located inside the reinforcing cage 20, the heads of the fixing bolts 5 do not protrude outside the outer peripheral portion of the reinforcing cage 20. Therefore, when concrete is driven in and a concrete structure is constructed, there is no possibility that a thin portion caused by the fixing bolt 5 is generated between the surface of the structure and the reinforcing bar 20.
[0041]
The intersection of the bar-shaped streak 1 and the hoop streak 8 may be fixed by welding or by a clip 9. However, from the viewpoint of maintaining the quality of the reinforcing rod cage 20 and assembling properties, it is more preferable to fix the reinforcing rod cage 20 with the clip fitting 9.
[0042]
Further, the reinforcing bar cage 20 according to the embodiment uses the reinforcing bar fixing brackets 10 and 30 with the spacers 6 in at least four places among the reinforcing bar fixing brackets for fixing one round of the band-shaped plate 2. Assembled. In this case, it is desirable that the reinforcing bar fixing brackets 10 and 30 with the spacer 6 be used at positions at substantially equal angular intervals (90-degree intervals) about the central axis of the reinforcing bar cage 20. When the upper and lower belt-shaped plates 2 are viewed, a total of eight rebar fixing brackets 10 and 30 with spacers 6 are arranged at substantially equal angular intervals (45-degree intervals) about the central axis of the rebar cage 20. It is desirable that it be used at a certain location.
[0043]
According to the reinforcing bar cage 20 using the reinforcing bar fixing fittings 10 and 30 with the spacer 6, when the reinforcing bar cage 20 is installed in the drilling hole, the interval between the inner wall of the drilling hole and the outer peripheral portion of the reinforcing bar cage 20 is set as follows. It can be adjusted exactly to the set distance. In addition, the position of the head 6a of the spacer 6 can be adjusted very easily by selecting and combining a plurality of types of tubular members 6d1, 6d2, 6d3 having different lengths and inserting them into the shaft 6b. Can be arbitrarily selected between the inner wall and the outer peripheral portion of the reinforcing rod cage 20.
[0044]
Further, when the reinforcing bar cage 20 according to the embodiment is built in the excavation hole, the intersection between the bar-shaped bar 1 and the band-shaped plate 2 is fixed when the reinforcing bar cage 20 is lifted and dropped into the drilling hole. Some of the rebar fixing brackets 10 and 30 are removed, and the removed portions are inserted into the drill holes. In this case, it is desirable to remove all but the reinforcing bar fixing brackets 10 and 30 with the spacer 6, but it is not necessary to remove all. By reusing the removed reinforcing metal fittings 10 and 30, it is possible to significantly reduce the cost of the reinforcing rod cage 20.
[Brief description of the drawings]
FIG. 1 is a perspective view of a main part showing an aspect in which an intersection of reinforcing bars is fixed using a reinforcing-bar fixing metal according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a spacer for a reinforcing bar cage according to the embodiment.
FIG. 3 is a perspective view showing a configuration of a metal reinforcing bar according to another embodiment.
4A and 4B are views for explaining the structure of the reinforcing bar cage according to the embodiment, in which FIG. 4A is a partial perspective view of the reinforcing bar cage, and FIG. 4B is a clip fitting used for fixing the bar bar and the hoop bar. (C) is a perspective view showing a state in which an intersection between a bar-shaped streak and a hoop streak is fixed by a clip.
FIG. 5 is a diagram showing an example of the structure of a conventional reinforcing cage, (a) is a plan view of the reinforcing cage, and (b) is a side view.
FIG. 6 is a partial perspective view showing a reinforcing bar cage reinforced with a conventional belt-like plate.
FIG. 7 is a perspective view showing a conventional metal fitting for fixing a reinforcing bar between a main reinforcing bar and a band-shaped plate.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 bar-shaped bar 2 band-shaped plate 3 bar-shaped bar gripping portion 4 screw hole plate portion 5 bolt 6 spacer 7 nut 8 hoop bar 9 clip fitting 10, 30 reinforcing bar fixing bracket 20 rebar cage

Claims (9)

Reinforcing metal fittings for fixing the intersection of the bar and the strip,
A bar-shaped muscle gripping portion which is positioned sandwiching the band-shaped plate in the vertical direction and has the C-shaped notch for the bar-shaped muscle insertion,
A rebar comprising: a screw hole plate portion formed with a screw hole for bolt screw connection for connecting the two bar-shaped bar gripping portions and tightening an intersection between the bar-shaped bar and the band-shaped plate. Fixing bracket. The metal fitting for fixing a reinforcing bar according to claim 1, wherein a nut for reinforcing the screw hole for bolt screwing is fixed to the screw hole plate portion. Reinforcing metal fittings for fixing the intersection of the bar and the strip,
A bar-shaped muscle gripping portion which is positioned sandwiching the band-shaped plate in the vertical direction and has the C-shaped notch for the bar-shaped muscle insertion,
A connecting plate portion formed with a through-hole through which a bolt for connecting the two bar-shaped stitch gripping portions and tightening an intersection between the bar-shaped streak and the band-shaped plate is passed;
And a nut for screwing the bolt fixed to a position of the connection plate portion communicating with the through hole. A spacer for a reinforcing bar used for building a reinforcing bar,
A bowl-shaped head,
A shaft portion having one end in the length direction joined to the inside of the head,
A bearing through which the shaft portion is inserted and attached to a reinforcing bar fixing bracket,
A tubular member that is inserted through the shaft portion and that defines a length of the head protruding from the bearing. The spacer according to claim 4, wherein a plurality of types of tubular members having different lengths are prepared. The rebar fixing spacer according to any one of claims 1 to 3, wherein the bearing of the rebar cage spacer according to claim 4 or 5 is fixed to the rod-shaped streak gripping portion. Metal fittings. A plurality of bar-shaped streaks arranged around the central axis substantially in parallel with the center axis direction, and a plurality of hoop streaks arranged in a circumferential direction substantially perpendicular to the center axis and having an intersection with the plurality of bar-shaped streaks And a rebar basket configured to include
It is arranged inside the bar-shaped streaks, and includes a reinforcing strip having an intersection with these bar-shaped streaks,
The intersection of the bar and the hoop is fixed by welding or clip fittings,
An intersecting portion between the bar-shaped bar and the band-shaped plate is fastened by the reinforcing bar fixing bracket according to any one of claims 1 to 3 or 6. The rebar cage according to claim 7, wherein at least four portions per cross of the intersection of the bar and the strip are fixed by the rebar fixing bracket according to claim 6. When the reinforcing rod cage according to claim 7 or 8 is erected in an excavation hole, after removing and collecting at least a part of the rebar fixing metal fittings fixing the bar-shaped bars and the band-shaped plate, A method for installing a reinforcing rod cage, comprising inserting the reinforcing rod cage into the excavation hole.

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