JP3914897B2 - Reinforcing bar fixing bracket, reinforcing bar rod, method for installing reinforcing bar rod, and method for assembling reinforcing bar rod - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention, reinforcing bar fixing brackets for assembling the reinforcing bar cage used for reinforcement of the structure, such as place pile or diaphragm wall constructed with concrete, the intersection of reinforcing bars by rebar fixing clasp fixed reinforcing bar cage, Kenkomi method rebar cage, and to a method of assembling the reinforcing bar cage, more particularly, especially strip-shaped plate with a suitable reinforcing bar fixing brackets to fix the intersection of the rod-like muscle reinforcing bar cage reinforcement, reinforcing bar fixing The present invention relates to a reinforcing bar rod using a metal fitting, a reinforcing bar rod mounting method for repeatedly using a reinforcing bar fixing metal fitting, and a reinforcing rod rod assembling method.
[0002]
[Prior art]
In cast-in-place piles and continuous underground walls constructed of concrete, an assembly called a reinforcing bar rod is formed into a cylindrical shape by combining a number of reinforcing bars in a grid pattern to reinforce the concrete structure. Used.
[0003]
FIG. 5 is an overall view showing an example of the structure of a conventional reinforcing bar rod. As shown in FIG. 5, the reinforcing bar rod 100 is generally configured to include 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 bars 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 rods 100 are often large, have a diameter of 0.6 to several meters, and have a length of 12 m per rod, and the diameter of the main bar 101 is generally about 19 to 35 mm. For this reason, the weight of the entire reinforcing bar 100 is often extremely heavy.
[0004]
As described above, since the rebar bar 100 is heavy in weight, for example, when it is used for a cast-in-place pile, when a place necessary for assembly can be secured near the position where the rebar bar 100 is built, it is close to the building place. Assembling, transporting to the construction site, lifting and building in the excavation hole is adopted.
[0005]
On the other hand, when a place necessary for assembly cannot be secured, a method of assembling in another place, transporting to a building place, and building is adopted. If the reinforcing bar 100 is not sufficiently rigid during the assembly, transportation, and building process, it will be deformed even if the reinforcing bar 100 receives a slight impact during transportation or lifting. Disappear. Accordingly, measures are taken to increase the rigidity of the reinforcing bar 100, and a method of reinforcing with the reinforcing members 104 and 105 is adopted as shown in FIG.
[0006]
A method that does not use such reinforcing members 104 and 105 has also been proposed, and a method of strengthening the welded portion of the intersection of the main reinforcement 101 and the hoop reinforcement 102 with a special metal fitting (for example, JP-A-7-62650). Publication) etc. are 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 rod reinforced by a conventional belt-like plate. As shown in FIG. 6, the belt-like plate 103 is in contact with the main bar 101 from the inside of the reinforcing bar 100 and is fixed to the main bar 101 at the intersection with the main bar 101. Usually, the interval between the strips 103 is set to about 2 to 3 m. In the case where the strip plate 103 is used for reinforcement, the main bar 101 is fixed from the inside of the reinforcing bar rod 100 because such a configuration is most effective in improving the rigidity of the reinforcing bar rod 100.
[0008]
The intersection between the main reinforcement 101 and the hoop reinforcement 102 and the intersection between the principal reinforcement 101 and the belt-like plate 103 can be joined together by welding. However, welding by welding at a construction site may include variations in welding strength due to the season and weather, variations due to the skill level of the welding engineer, and the like, and there is a high possibility that the rigidity of the reinforcing bar 100 will vary. It has also been pointed out that the strength of the weld tends to decrease with the passage of time.
[0009]
Therefore, in order to improve the reliability of joining and fixing at the intersection, a method for assembling the reinforcing bar rod using the reinforcing bar fixing metal fitting 108 shown in FIG. 6 with less work variation is employed instead of welding. In particular, it is effective to use a reinforcing bar fixing metal fitting 108 at the intersection between the strip-like plate 103 which is a reinforcing material and the main reinforcing bar 101.
[0010]
FIG. 7 is a perspective view showing a reinforcing bar fixing metal fitting 108 which the present inventor previously invented and disclosed in Japanese Patent Laid-Open No. 2002-106113. If the reinforcing bar fixing metal 108 is used, the main reinforcing bar 101 and the belt-like plate (reinforcing ring) 103 can be reliably fixed by a simple operation. As shown in FIG. 7, the metal fitting 108 for reinforcing steel bars is “a plate-like body 109 is folded in a U-shape to form left and right pieces, and a U-shaped bent portion is a main reinforcement. The left and right side pieces are further extended from the intermediate portion in the longitudinal direction of the main muscle insertion portion to the end portion to form a protruding piece 110, and a reinforcing material (band-like shape) is formed from one extended side edge of the protruding piece 110. The plate 103) is provided with a notch 111 for insertion, and a fixing bolt 112 is screwed into the main muscle insertion portion ".
[0011]
[Patent Document 1]
JP-A-7-62650 [Patent Document 2]
Japanese Patent Laid-Open No. 2002-106113
[Problems to be solved by the invention]
The rebar fixing metal fitting 108 is capable of reliably fixing the intersection between the main reinforcing bar 101 and the belt-like plate (reinforcing material, reinforcing ring) 103, and has an excellent characteristic that the reinforcing bar rod 100 can be effectively reinforced. have. However, as is apparent from FIG. 7, the head of the fixing bolt 112 is located outside the reinforcing bar 100, and therefore the head of the fixing bolt 112 is embedded in the concrete structure as a concrete reinforcing material. The wall thickness of the concrete becomes thinner than other parts. Therefore, it is necessary to take a measure to shorten the length of the fixing bolt 112 as much as possible. In addition, since the main bar 101 is tightened by the tip of the fixing bolt 112, the contact area between the tip of the fixing bolt 112 and the main bar 101 is narrow, and there is a possibility that the main bar 101 may be damaged by the fixing bolt 112. there were.
[0013]
The present invention has been made in view of the above-mentioned problems, and the intersection of the main reinforcing bar such as a reinforcing bar rod (hereinafter referred to as “bar-shaped bar”) and the reinforcing strip-shaped plate can be firmly and securely fixed. Providing a reinforcing bar fixing bracket that does not damage the main bars and the bolt heads are not located outside the reinforcing bar rods. Providing spacers that can easily adjust the spacing to a predetermined value and spacers that can be easily installed and removed, and the rigidity that is assembled using these reinforcements An object of the present invention is to provide a reinforcing bar with a high quality and a stable quality, a method for building a reinforcing bar with excellent economic efficiency, and a method for assembling a reinforcing bar using these reinforcing bar fixing brackets .
[0014]
[Means for solving the problems and effects]
In order to achieve the above object, a reinforcing bar fixing metal fitting (1) according to the present invention is a reinforcing bar fixing metal fitting for fixing an intersecting portion between a rod-like reinforcing bar and a belt-like plate, and is positioned so as to sandwich the belt-like plate in the vertical direction. And a screw for screwing a bolt for connecting the rod-like muscle gripping portion having the C-shaped notch for inserting the rod-like muscle and the two rod-like muscle gripping portions and tightening an intersection of the rod-like muscle and the belt-like plate. through a screw hole plate portion hole is formed, the head having a bowl shape, the shaft part whose one end is joined to the inside of the head length direction, is fixed to the rod-shaped muscle gripper, the shaft portion And a reinforcing bar scissor having a tubular member that is inserted through the shaft portion and defines a protruding length of the head from the bearing .
[0015]
According to the rebar fixing metal fitting (1), when fixing the intersecting portion of the bar-shaped bar and the strip-shaped plate, the bar-shaped bar and the bar-shaped bar are arranged so that the two bar-shaped bar gripping parts grip the bar-shaped bar. The screw hole plate part is set so as to be positioned inside the belt-like plate and fitted into the crossing portion with the belt-like plate. Thereafter, a bolt is set on the screw hole plate portion, and the crossing portion is fixed by tightening the belt-like plate with the bolt.
[0016]
Therefore, the head of the bolt is located inside the belt-like plate wound in a ring shape, and does not come out of the ring, and the rebar fixing metal fitting is used for a rebar rod or the like and reinforced with the rebar rod When the concrete structure is constructed, the thin-walled portion of the concrete due to the bolt head does not occur. Further, since the belt-like plate is pressed against the rod-like streak at the front end surface of the bolt, there is no possibility of damaging the rod-like streak by the bolt, and a high fixing force can be obtained. Furthermore, the rebar fixing metal fittings used for fixing the reinforcing strips when assembling the rebar rods can be removed and re-used at the time of building the rebar rods, etc. Yes.
Further, since the bearing is fixed to the rod-like muscle gripping portion, the reinforcing bar scissors can be attached to the reinforcing bar rod very easily via the reinforcing bar fixing bracket simply by inserting the shaft portion into the bearing. be able to. In addition, by using the tubular member, it is possible to easily adjust the protruding length of the head from the reinforcing bar rod.
[0017]
Further, the reinforcing bar fixing bracket (2) according to the present invention is characterized in that, in the reinforcing bar fixing bracket (1), a nut for reinforcing the bolt screwing screw hole is fixed to the screw hole plate portion. .
According to the rebar fixing metal fitting (2), the tightening force on the strip-shaped plate, that is, the tightening force on the rod-shaped strip and the strip-shaped plate can be further increased. In addition, bolts can be attached to the nut in advance, and in this state, the nut can be fitted into the intersection of the bar-like strip and the belt-like plate, so that handling at the construction site can be improved. Furthermore, the handleability at the time of repeatedly using the reinforcing bar fixing metal fitting can also be improved.
[0018]
Further, the reinforcing bar fixing metal fitting (3) according to the present invention is a reinforcing bar fixing metal fitting for fixing the crossing portion of the bar-shaped bar and the strip-shaped plate, and is positioned so as to sandwich the strip-shaped plate in the vertical direction. A rod-shaped muscle gripping portion having a C-shaped cutout portion for use and a through-hole for connecting the two rod-shaped muscle gripping portions and penetrating a bolt for tightening an intersection of the rod-shaped muscle and the strip-shaped plate are formed. A connecting plate part, a nut for screwing the bolt fixed at a position communicating with the through hole of the connecting plate part, a bowl-shaped head, and one end side in the length direction are joined to the inside of the head. shaft portions, is fixed to the rod-shaped muscle gripping portion, a bearing for inserting the shaft portion, and is inserted into the shaft portion, reinforcing bars having a tubular member defining a projection length from the bearings of the head It is characterized by comprising a basket spacer .
According to the rebar fixing metal fitting (3), the same effects as the effect of the rebar fixing metal fitting (1) and the effect of the rebar fixing metal fitting (2) can be obtained.
[0021]
Moreover, the reinforcing bar fixing metal fitting (4) according to the present invention includes the reinforcing bar fixing spacer according to any one of the reinforcing bar fixing metal fittings (1) to (3), including a plurality of types of tubular members having different lengths. It is characterized by being composed .
According to the rebar fixing metal fitting (4) , the projection length of the head from the rebar rod can be easily adjusted in a wide range by selecting, combining and inserting the tubular member into the shaft portion. it can.
[0023]
Further, the reinforcing bar rod (1) according to the present invention is arranged around a central axis in a circumferential direction substantially perpendicular to the central axis, and a plurality of rod-shaped bars arranged substantially parallel to the central axis direction. Reinforcing bar made by including a plurality of hoops having crossed bars and a plurality of hoops, arranged inside the bar, and provided with a reinforcing strip-shaped plate having the crossed bars and crossings, The crossing part of the bar-shaped bar and the hoop bar is fixed by welding or a clip metal fitting, and the crossing part of the bar-shaped bar and the belt-like plate is any one of the reinforcing bar fixing metal fittings (1) to ( 4 ). It is characterized by being tightened by a reinforcing bar fixing bracket.
[0024]
According to the reinforcing bar rod (1), the belt-like plate that is the reinforcing bar is fastened to the bar-like bar that is the main bar by any one of the reinforcing bar fixing brackets (1) to ( 4 ). The intersecting portion between the rod-like streak and the belt-like plate is firmly fixed. Therefore, since the reinforcing effect of the reinforcing bar by the strip plate is extremely high, a highly rigid assembly can be obtained. Further, since the fixing bolt is positioned inside the reinforcing bar rod or the like, the bolt head does not come out of the outer peripheral portion of the reinforcing bar rod or the like. For this reason, when a concrete structure is constructed using the reinforcing bar rod as a reinforcing body, there is no possibility that a thin portion due to the fixing bolt is generated between the surface of the structure and the reinforcing bar rod. In addition, since the rod-like bars are not damaged by the fixing bolts, a strong reinforcing bar can be provided.
[0025]
Further, in the reinforcing bar rod (2) according to the present invention, in the reinforcing bar rod (1), at least four places per one of the intersections of the bar-shaped bar and the strip-shaped plate are the reinforcing bar fixing bracket (1). It is characterized by being fixed by any one of ( 4 ).
According to the rebar bar (2), since the rebar fixing bracket to which the rebar bar spacer is attached very easily is used, when the rebar bar is installed in the drill hole, The reinforcing bar rod can be built into the excavation hole while attaching a reinforcing bar rod spacer capable of accurately adjusting the distance between the outer peripheral portion of the reinforcing bar rod and the set distance. Moreover, since the protrusion length of the head from the reinforcing bar can be easily adjusted in a wide range, the interval between the inner wall of the excavation hole and the outer peripheral part of the reinforcing bar can be arbitrarily selected.
[0026]
Further, in the reinforcing bar erection method (1) according to the present invention, when the reinforcing bar slab (1) or (2) is erected into the excavation hole, the reinforcing bar is fixed to the strip. After removing and recovering a part of the fixing bracket, the reinforcing bar rod is inserted into the excavation hole.
According to the method (1) of building up the reinforcing bar rod, since the reinforcing bar fixing metal fitting can be used repeatedly, the assembly cost of the reinforcing bar rod can be reduced.
The rebar rod assembling method (1) according to the present invention includes a step of arranging a plurality of rod-like bars around the central axis substantially parallel to the central axis direction, and a circumferential direction substantially orthogonal to the central axis. A step of arranging a plurality of hoop muscles so as to intersect with the plurality of rod-like muscles, a step of arranging a reinforcing band plate so as to intersect with these rod-like muscles inside the rod-like muscles, and the rod-like muscles; A step of fixing the crossing portion with the hoop bar by welding or clip metal fitting, and a step of fastening the crossing portion of the bar-shaped bar and the belt-like plate by any of the above-mentioned metal bar fixing metal fittings (1) to ( 4 ), It is characterized by including.
According to the method for assembling the reinforcing bar rod (1), the strip plate as the reinforcing bar is fastened to the rod-like bar as the main reinforcing bar by any of the reinforcing bar fixing brackets (1) to ( 4 ). The intersection between the rod-like streak and the belt-like plate is firmly fixed. Therefore, since the reinforcing effect of the reinforcing bar by the strip plate is extremely high, a highly rigid assembly can be obtained. Further, since the fixing bolt is positioned inside the reinforcing bar rod or the like, the bolt head does not come out of the outer peripheral portion of the reinforcing bar rod or the like. For this reason, when a concrete structure is constructed using the reinforcing bar rod as a reinforcing body, there is no possibility that a thin portion due to the fixing bolt is generated between the surface of the structure and the reinforcing bar rod. In addition, the reinforcing bar can be assembled without damaging the rod-like bars by the fixing bolts, and the reinforcing bar bar spacer can be attached to the bar bar via the reinforcing bar fixing bracket very easily. Can do.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a reinforcing bar fixing metal fitting , a reinforcing bar rod, a reinforcing bar rod mounting method, and a reinforcing bar rod assembly method according to embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing an aspect in which a reinforcing bar fixing bracket according to an embodiment is used to fix an intersection between a reinforcing bar and a reinforcing member.
[0028]
As shown in FIG. 1, the objects to be fixed are a bar-like bar 1 as a reinforcing bar and a strip-like plate 2 having a large ring shape as a reinforcing member (only the vicinity of the fixing part is shown in FIG. 1). The crossing portion is fixed by the reinforcing bar fixing metal fitting 10.
[0029]
The rebar fixing metal fitting 10 is positioned with the strip-like plate 2 sandwiched in the vertical direction, and has a bar-like muscle gripping portion 3 having a C-shaped cutout portion 3a for inserting the rod-like muscle 1 and these two rod-like muscle gripping portions 3. And a screw hole plate portion 4 for connecting the two. A screw hole 4 a for screwing a bolt 5 for tightening an intersecting portion between the rod-like streaks 1 and the belt-like plate 2 is formed at a substantially central portion of the screw hole plate portion 4.
[0030]
Further, a bearing 6c constituting a reinforcing bar scissor spacer 6 is fixed to the upper surface of the rod-shaped muscle gripping portion 3. The rebar rod spacer 6 includes a bowl-shaped head portion 6a, a shaft portion 6b whose one end in the length direction is joined to the inside of the head portion 6a, and the shaft portion 6b. And a tubular member 6d that is inserted through the shaft portion 6b and defines the protruding length of the head portion 6a from the bearing 6c.
[0031]
The rebar rod spacer 6 can be easily attached to the rebar fixing metal fitting 10 simply by inserting the shaft portion 6b into the bearing 6c. Moreover, the tubular member 6d is provided with a plurality of types of tubular members 6d1, 6d2, and 6d3 having different lengths. By simply selecting and combining these tubular members 6d1, 6d2, and 6d3, the tubular member 6d can be inserted into the shaft portion 6b. The protrusion length from the reinforcing bar 20 can be easily adjusted in a wide range.
[0032]
When the reinforcing bar 10 is attached to the intersection of the bar 1 and the strip 2 and the intersection of the bar 1 and the strip 2 is tightened, the two bar holding parts 3 of the reinforcing bar 10 are fixed. Is positioned at a position where the strip-shaped plate 1 is sandwiched in the vertical direction and the rod-shaped streak 1 is gripped. At this time, the screw hole plate portion 4 of the reinforcing bar fixing metal fitting 10 is set so as to be positioned on the inner side of the belt-like plate 2 (center side of the ring shape). Next, the 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 the intersecting portion of the belt-like plate 2 and the rod-like streak 1 so that the rod-like streak 1 and the belt-like plate are tightened. 2 is fixed.
[0033]
If fixed in this way, the head of the bolt 5 is positioned inside the ring-shaped strip 2 and does not come out of the strip 2. Further, since the belt-like plate 2 is pressed against the bar-like streak 1 by the “surface” of the front end portion of the bolt 5, a high fixing force can be obtained, and further, the bar-like bar 1 is damaged by the bolt 5. There is nothing. The bolt 5 does not necessarily have to be attached to the screw hole plate portion 4 in advance, but it is desirable to attach the bolt 5 to the screw hole plate portion 4 in advance in consideration of workability on site.
[0034]
Further, the reinforcing bar rod spacer 6 is used to adjust the distance between the inner wall of the drilling hole and the outer peripheral portion of the reinforcing bar rod 20 to a set distance when, for example, the reinforcing bar rod 20 is installed in the drilling hole. The distance between the inner wall of the excavation hole and the outer periphery of the reinforcing bar 20 can be adjusted in a very wide range by selecting a plurality of types of tubular members 6d1, 6d2, and 6d3 having different lengths and inserting them into the shaft portion 6b in combination. can do.
[0035]
FIG. 3 is a perspective view showing a configuration of a reinforcing bar fixing metal fitting according to the 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 reinforcing bar fixing metal fitting 30 according to the embodiment (2). The bolt 5 is screwed onto the nut 7 and tightened to fix the intersecting portion between the bar-like streak 1 and the belt-like plate 2. 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 portion 4 by welding. By adopting such a joining method, the nut 7 can be firmly joined to the screw hole plate portion 4 and joining with little variation in joining strength can be performed.
[0036]
4A and 4B are diagrams for explaining the structure of the reinforcing bar rod according to the embodiment of the present invention, in which FIG. 4A is a partial perspective view of the reinforcing rod rod, and FIG. 4B is used for fixing the rod-shaped bar and the hoop bar. FIG. 4C is a perspective view showing a state in which the intersection of the bar-like line and the hoop line is fixed by the clip metal piece.
[0037]
As shown in FIG. 4, in the reinforcing bar rod 20 according to the embodiment, a plurality of hoop muscles 8 are wound around a plurality of rod-like muscles 1 that are longitudinal bars, and Each intersection is assembled by being fixed by welding or clip fitting 9. And the strip | belt-shaped board 2 is wound so that it may contact | connect the rod-shaped stripe | line | muscle 1 from the inner side of the reinforcing bar rod 20 between the plurality of hoop bars 8, and the intersection of the rod-like stripe | line | wire 1 and the strip | belt-shaped board | plate 2 is described in embodiment. It is fixed by any of the reinforcing bar fixing brackets 10 and 30 (not shown in FIG. 4).
[0038]
However, it is not necessary that all the intersections of the bar 1 and the strip 2 are fixed by any of the reinforcing bar fixing brackets 10 and 30 according to the embodiment. In consideration of this, it is only necessary to determine an intersection where the reinforcing metal fittings 10 and 30 are used.
[0039]
FIG. 4B is a perspective view showing an example of a clip metal fitting used to fix the intersecting portion between the rod-like muscle 1 and the hoop muscle 8. The clip metal fitting 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 fitting 9 shown in FIG. 4B, the relationship between the rod-like muscle 1, the hoop line 4 and the clip metal piece 9 is the same as that shown in FIG. Become.
[0040]
In the reinforcing bar rod 20 according to the embodiment, the belt-like plate 2 that is a reinforcing bar is fastened to the bar-like bar 1 that is the main bar by the reinforcing bar fixing bracket 10 or 30 according to the embodiment. Is firmly fixed. Therefore, the reinforcing effect by the strip plate 2 is extremely high. Further, since the bolt 5 for tightening is positioned inside the reinforcing bar rod 20, the head of the fixing bolt 5 does not come out of the outer periphery of the reinforcing bar rod 20. Therefore, when concrete is driven and a concrete structure is constructed, there is no possibility that a thin portion due to the fixing bolt 5 is generated between the surface of the structure and the reinforcing bar 20.
[0041]
The cross section between the bar 1 and the hoop 8 may be fixed by welding or by the clip metal fitting 9. However, from the viewpoint of maintaining the quality of the reinforcing bar 20 and assembling, it is more preferable to fix the reinforcing bar 20 with the clip metal fitting 9.
[0042]
In addition, the reinforcing bar rod 20 according to the embodiment uses the reinforcing bar fixing brackets 10 and 30 with the spacers 6 at least at four positions among the reinforcing bar fixing brackets for fixing one turn of the belt-like plate 2. It is assembled. In this case, it is desirable that the rebar fixing metal fittings 10 and 30 with the spacer 6 are used at positions that are substantially equiangularly spaced (90 degrees apart) with the central axis of the rebar rod 20 as the center. Further, when viewed with respect to the upper and lower strips 2, the reinforcing bar fixing brackets 10 and 30 with a total of eight spacers 6 are arranged at substantially equal angular intervals (45 degree intervals) about the central axis of the reinforcing bar rod 20. It is desirable to be used at a certain position.
[0043]
According to the reinforcing bar rod 20 in which the reinforcing bar fixing brackets 10 and 30 with the spacer 6 are used, when installing the reinforcing bar rod 20 in the excavation hole, the interval between the inner wall of the excavation hole and the outer peripheral portion of the reinforcing bar rod 20 is It can be accurately adjusted to the set distance. Further, the position of the head 6a of the spacer 6 can be very easily adjusted by selecting, combining, and inserting a plurality of types of tubular members 6d1, 6d2, 6d3 having different lengths into the shaft portion 6b. The interval between the inner wall of the steel bar and the outer periphery of the reinforcing bar rod 20 can be arbitrarily selected.
[0044]
Further, when the reinforcing bar rod 20 according to the embodiment is built in the excavation hole, when the reinforcing bar rod 20 is lifted and dropped into the excavation hole, the intersection of the bar 1 and the strip 2 is fixed. Some of the reinforcing bar fixing metal members 10 and 30 are removed, and the removed part is inserted into the excavation hole. In this case, it is desirable to remove all but the rebar fixing metal fittings 10 and 30 with the spacer 6, but it is not always necessary to remove all of them. By reusing the removed rebar fixing metal fittings 10 and 30, the cost of the rebar rod 20 can be greatly reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view of a main part showing an aspect of fixing a crossing portion of reinforcing bars using a reinforcing bar fixing metal fitting according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a reinforcing bar scissor according to an embodiment.
FIG. 3 is a perspective view showing a configuration of a reinforcing bar fixing metal fitting according to another embodiment.
4A and 4B are diagrams for explaining the structure of a reinforcing bar rod according to the embodiment, in which FIG. 4A is a partial perspective view of the reinforcing rod rod, and FIG. 4B is a clip metal fitting used for fixing a rod-shaped bar and a hoop bar; (C) is a perspective view which shows the state by which the cross | intersection part of a rod-like line and a hoop line is being fixed with the clip metal fitting.
5A and 5B are diagrams showing an example of a conventional reinforcing bar rod structure, in which FIG. 5A is a plan view of the reinforcing bar rod and FIG. 5B is a side view thereof.
FIG. 6 is a partial perspective view showing a reinforcing bar rod reinforced with a conventional belt-like plate.
FIG. 7 is a perspective view illustrating a conventional metal fitting for reinforcing steel bars between a main reinforcing bar and a strip-shaped plate.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bar-shaped reinforcement 2 Strip | belt-shaped board 3 Rod-shaped reinforcement holding part 4 Screw hole board part 5 Bolt 6 Spacer 7 Nut 8 Hoop reinforcement 9 Clip metal fittings 10 and 30 Reinforcing bar fixation metal fitting 20 Reinforcement rod

Claims (8)

It is a metal fitting for rebar fixing which fixes the crossing part of a bar-shaped bar and a strip-shaped board,
A rod-shaped muscle gripping portion that is located between the strip plate in the vertical direction and has the C-shaped cutout portion for inserting the rod-shaped muscle;
A screw hole plate portion in which a screw hole for bolt screwing is formed for connecting the two rod-like muscle gripping portions and tightening an intersection of the rod-like muscle and the belt-like plate;
Shank head has a bowl shape, one end side in the longitudinal direction is joined to the inside of the head, it is fixed to the rod-shaped muscle gripping portion, a bearing for inserting the shaft portion, and inserted into the shaft portion And a reinforcing bar fixing metal fitting , comprising: a reinforcing bar scissor spacer having a tubular member that defines a protruding length of the head from the bearing .   The rebar fixing bracket according to claim 1, wherein a nut for reinforcing the bolt screw hole is fixed to the screw hole plate portion. It is a metal fitting for rebar fixing which fixes the crossing part of a bar-shaped bar and a strip-shaped board,
A rod-shaped muscle gripping portion that is located between the strip plate in the vertical direction and has the C-shaped cutout portion for inserting the rod-shaped muscle;
A connecting plate portion in which a through hole is formed to connect a bolt for connecting the two rod-like muscle gripping portions and tightening an intersection between the rod-like muscle and the belt-like plate;
A nut for screwing the bolt fixed to a position communicating with the through hole of the connecting plate portion;
Shank head has a bowl shape, one end side in the longitudinal direction is joined to the inside of the head, it is fixed to the rod-shaped muscle gripping portion, a bearing for inserting the shaft portion, and inserted into the shaft portion And a reinforcing bar anchoring bracket , comprising: a reinforcing bar scissor having a tubular member that defines a protruding length of the head from the bearing . The rebar fixing bracket according to any one of claims 1 to 3, wherein the rebar bar spacer includes a plurality of types of tubular members having different lengths. A plurality of rod-like bars arranged around the central axis substantially parallel to the central axis direction, and a plurality of hoop muscles arranged in a circumferential direction substantially orthogonal to the central axis and having the intersections with the plurality of rod-like bars A rebar rod composed of
It is arranged inside the bar-shaped bars, and includes a reinforcing strip-shaped plate having an intersection with the bar-shaped bars,
The intersection of the bar and the hoop is fixed by welding or clip fittings,
A reinforcing bar rod, wherein an intersection between the bar and the strip is fastened by a reinforcing bar fixing metal fitting according to any one of claims 1 to 4 . Of intersections of the strip-shaped plate and the rod-like muscle, wherein at least four locations per one rotation, characterized in that it is fixed by the reinforcing bar fixing bracket according to any one of claims 1-4 Item 5. A reinforcing bar rod according to item 5 . When the reinforcing bar rod according to claim 5 or 6 is installed in the excavation hole, after removing and recovering a part of the reinforcing bar fixing metal fittings fixing the rod-like bar and the strip plate, A rebar erection method, comprising inserting a rebar slab into the excavation hole. Arranging a plurality of rod-shaped streaks around the central axis substantially parallel to the central axis direction;
Disposing a plurality of hoop muscles in a circumferential direction substantially perpendicular to the central axis so as to intersect with the plurality of rod-like muscles;
A step of arranging a reinforcing strip-shaped plate inside the bar-shaped bars so as to intersect with the bar-shaped bars;
Fixing the intersection of the bar-like line and the hoop line with welding or a clip fitting;
A method for assembling a reinforcing bar rod, comprising a step of tightening an intersection of the bar-shaped bar and the belt-like plate with the reinforcing bar fixing metal fitting according to any one of claims 1 to 4 .

Images