JP2023104805A - Support frame for reinforced beam - Google Patents

Abstract

To provide support frames for reinforcement beams in concrete construction work that demonstrate excellent construction strength and durability by firmly adhering concrete to longitudinal bars, base steel plates and reinforcement beams for constructing the reinforcement beams on discarded concrete layers, have high assembly strength of longitudinal bar holders to the base steel plates, and reduce a workload at a site.SOLUTION: In a support frame 100 for reinforcement beams, a longitudinal bar holder 120 comprises: a spread-bottomed holder pedestal portion 121 that is fixed to a base steel plate 110; a longitudinal bar insertion and fitting portion 122 that continuously and spirally rises from one end of the holder pedestal portion 121; a U-shaped side extension portion 123 that is continuous from the longitudinal bar insertion and fitting portion 122 to allow main bars of the reinforcement beam spaced apart and arranged; and a longitudinal bar holding portion 124 that continuously and spirally rises from the side extension portion 123.SELECTED DRAWING: Figure 2

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support frame for a reinforcement beam for constructing a reinforcement beam on a layer of discarded concrete in concrete construction.

Conventionally, as a support frame for a reinforcing bar beam, there is a cylindrical lower column that stands upright with its lower end fixed to a base steel plate, and an upper portion that is inserted into the lower column and supported by an adjuster so that it can be adjusted in the vertical direction. It is composed of a column and a reinforcing bar support member fixed to the upper end of the upper column and extending in the horizontal direction (see FIG. 8 of Patent Document 1). Consisting of a standing post, a T-shaped kansas support that is vertically adjustable supported on the upper end of the stilt, and a kansas muscle that is horizontally inserted into and fixed to the kansas support (Fig. 1), consisting of a lower strut standing upright from a base steel plate, an upper strut supported vertically adjustable with respect to this lower strut, and a reinforcing bar support member fixed to the upper end of this upper strut. A reinforcing bar support member made of a so-called angle member having an L-shaped cross section is known (see Patent Document 2).

Japanese Patent Application Laid-Open No. 2002-30678 (especially see FIGS. 1 and 8, respectively) Japanese Utility Model Laid-Open No. 5-77335 (especially see FIG. 1)

However, the support frame for reinforcing bar beams described in FIG. 8 of Patent Document 1 has a long cylindrical lower column fixed vertically to the base steel plate, so the manufacturing cost is high and the efficiency of transportation and storage is low due to the bulkiness. , there was a problem that the adhesion strength of concrete on the surface of the lower support was low. In addition, the support frame for reinforcing bar beams described in FIG. 1 of Patent Document 1 is bulky and inconvenient to transport because the columns are integrally fixed to the base steel plate, and the heavy weight makes it difficult to install on site. It was a heavy burden. In addition, the support frame for reinforcing steel beams described in Patent Document 2 has a high manufacturing cost because the long L-shaped lower column is fixed vertically to the base steel plate, is bulky, and has low efficiency in transportation and storage. In particular, there is a problem that the flow of coarse aggregate is blocked by the lower struts and the concrete is not sufficiently filled, resulting in deterioration of the durability of the concrete.

Therefore, the present invention solves the problems of the prior art as described above, that is, an object of the present invention is to exhibit excellent construction strength and durability, and to reliably and firmly support a reinforcing bar beam. To provide a support frame for a reinforcing bar beam, which can be stored and transported efficiently, is light in weight, and reduces the work load on site.

The invention according to claim 1 consists of a base steel plate installed on a surplus concrete layer for constructing a reinforcing beam, and a vertical bar for supporting the reinforcing steel beam integrally suspended on the base steel plate by a steel bar. and a holder reinforcing bar that is integrally attached on the generatrix of the vertical bar holder to reinforce the holder form of the vertical bar holder, and the structure on the discarded concrete layer A plurality of supporting frames for reinforcing bar beams arranged at installation positions, wherein the vertical bar holders are spirally erected continuously from one end of a wide-bottomed holder pedestal portion fixed to the base steel plate and the holder pedestal portion. A vertical reinforcement inserting portion, a U-shaped side overhanging portion for disposing the main reinforcement of the reinforcing bar beam continuously with the vertical reinforcement inserting portion, and a spirally rising portion continuously with the side overhanging portion. The problem described above is solved by being configured with the vertical muscle holding portion.

The invention according to claim 2, in addition to the configuration of the invention according to claim 1, is characterized in that the holder reinforcing bar is a U-shaped reinforcing pedestal portion fixed to the base steel plate and extending from both ends of the reinforcing pedestal portion, respectively. The problem described above is solved by having the first reinforcing column and the second reinforcing column standing upright.

The invention according to claim 3, in addition to the configuration of the invention according to claim 1 or claim 2, is characterized in that the spiral winding direction of the vertical muscle inserting portion and the spiral winding direction of the vertical muscle holding portion are opposite to each other. The orientation further solves the problems discussed above.

The invention according to claim 4, in addition to the configuration of the invention according to any one of claims 1 to 3, is a deformed steel having a plurality of nodes in which the longitudinal bars are arranged at constant node intervals. It is a bar, and the spiral pitch of the vertical muscle inserting portion and the vertical muscle holding portion is set to be the same as the node interval of the vertical muscle, thereby further solving the above-mentioned problems.

The invention according to claim 5, in addition to the configuration of the invention according to any one of claims 1 to 4, is characterized in that the dimensions and shape of the side projecting portion are such that vertical reinforcement is inserted in the width direction of the base steel plate. The above-mentioned problems can be further solved by having a dimension and shape that protrudes outward with respect to the dimension and shape of the space area occupied by the fitting portion, the vertical muscle holding portion, the first reinforcing column portion, and the second reinforcing column portion. It is a solution.

In the invention according to claim 6, in addition to the configuration of the invention according to any one of claims 1 to 5, the dimensions and shape of the side projecting portion are equal to or greater than the length of the base steel plate inserted in the longitudinal direction of the base steel plate. The aforementioned problems are further solved by being within the dimension and shape of the spatial region occupied by the fitting portion, the vertical muscle holding portion, the first reinforcing column portion, and the second reinforcing column portion.

According to the reinforcement beam support frame of the invention according to claim 1 of the present invention, the base steel plate installed on the surplus concrete layer for constructing the reinforcement beam and the base steel plate are integrally suspended by the steel bar on the base steel plate. It consists of a spiral vertical bar holder into which vertical bars are inserted to support a reinforcing bar beam, and a holder reinforcing bar that is integrally attached on the generatrix of the vertical bar holder to reinforce the holder form of the vertical bar holder. As a result, the concrete placed on the reinforcing bar beams on the discarded concrete layer flows through the spiral gaps of the vertical bar holders to the vertical bars and adheres firmly to them. Concrete can be firmly fixed to the main reinforcing bars to exhibit excellent construction strength and durability.

In addition, since the vertical bar holder is provided with an expanded holder pedestal fixed to the base steel plate, the holder pedestal of the vertical bar holder is fixed to the base steel plate in an expanded bottom shape. The assembling strength of the vertical bar holder against the steel plate is increased, and not only can the reinforcing bar beam be supported reliably and firmly, but also the poured concrete is adhered to the base steel plate and firmly fixed, providing excellent construction strength and Durability can be exhibited.

Furthermore, since the vertical bar holder has a U-shaped side overhang, the concrete poured into the reinforcing bar beam on the sacrificial concrete layer will flow out of the gap formed by the side overhang. Since the concrete flows into and adheres more reliably to the vertical bars, it is possible to firmly fix the concrete to the main bars that make up the reinforcing steel beams in the vicinity of the vertical bars, thereby exhibiting even better construction strength and durability.

In addition to these, the support frame for the reinforcing steel beams is configured separately from the vertical bars, so the shape and dimensions are compact and not bulky, so the efficiency of storage and transportation can be improved. It is possible to reduce the work load of placing the reinforcing bar support frame on the construction surface.

According to the reinforcement beam support frame of the invention according to claim 2 of the present invention, in addition to the effect of the invention according to claim 1, the holder reinforcing bar is a U-shaped reinforcing pedestal portion fixed to the base steel plate. is fixed to the base steel plate in a U-shape, so that the mounting strength of the holder reinforcing bars to the base steel plate is increased, and the holder form of the vertical bar holder is further reliably reinforced. In addition, the poured concrete can be brought into close contact with the base steel plate and firmly fixed, thereby exhibiting excellent construction strength and durability.

In addition, since the holder reinforcing bar has the first reinforcing column portion and the second reinforcing column portion that stand upright from both ends of the reinforcing pedestal portion, the holder form of the vertical bar holder is reinforced at a plurality of locations. Deformation and buckling of the vertical bar holder can be prevented when the vertical bar is inserted into the holder or when an external force is applied to the vertical bar after insertion.

According to the reinforcement beam support frame of the invention according to claim 3, in addition to the effects of the invention according to claim 1 or claim 2, the spiral winding direction of the vertical reinforcement insertion part and the vertical reinforcement holding part Since the direction of the spiral winding is opposite, even if the main reinforcement is hit against the side overhanging portion and an external force is applied in the horizontal direction when installing the main reinforcement, the stress is dispersed vertically, and the vertical reinforcement Since the internal stress generated in the inserting portion and the internal stress generated in the vertical-bar holding portion are reversed upside down, the vertical-bar holder maintains its shape as a whole, so that the vertical-bar can be stably supported upright.

According to the reinforcement beam support frame of the invention according to claim 4, in addition to the effects of the invention according to any one of claims 1 to 3, the vertical reinforcements are arranged at regular node intervals. It is a deformed steel bar with multiple joints, and the helical pitch of the vertical bar insertion part and the vertical bar holding part is set to be the same as the interval between the vertical bar insertion parts and the vertical bar. Since the helical structure forming the muscle-holding part engages with the joints of the inserted vertical reinforcement and is not easily displaced, the reinforcement beam can be stably constructed on the sacrificial concrete layer.

According to the reinforcement beam support frame of the invention according to claim 5, in addition to the effects of the invention according to any one of claims 1 to 4, the dimensions and shape of the side projecting portion are equal to the base steel plate In the width direction of the vertical bar insertion part, the vertical bar holding part, the first reinforcing column part, and the second reinforcing column part. In order to form a wide area in the width direction of the base steel plate where the reinforcing bars placed horizontally in the vicinity of the support frame for the reinforcing steel beam cannot enter due to the side overhanging portion and the first reinforcing column portion, the longitudinal direction of the base steel plate are aligned with the longitudinal direction of the main reinforcement on the concrete layer, the arrangement interval of the main reinforcement can be defined to be equal to or greater than a predetermined dimension.

According to the reinforcement beam support frame of the invention according to claim 6, in addition to the effects of the invention according to any one of claims 1 to 5, the dimensions and shape of the side projecting portion are equal to the base steel plate Horizontally in the vicinity of the vertical bar holder by being within the dimension and shape of the space area occupied by the vertical bar insertion part, the vertical bar holding part, the first reinforcing column part and the second reinforcing column part in the longitudinal direction Since the area where the reinforcing bars to be installed cannot enter is limited to the dimensions and shape of the space area occupied by the vertical reinforcement holding part, the vertical reinforcement insertion part, and the first reinforcing column part and the second reinforcing column part, the side overhang part There is almost no interference with the stirrups, etc., and the degree of freedom of the bar arrangement position can be increased.

The typical perspective view which shows the state which constructed the reinforcement beam with the support frame for reinforcement beams of this invention. BRIEF DESCRIPTION OF THE DRAWINGS The typical perspective view showing the support stand for reinforcing-bar beams of this invention. FIG. 3 is a schematic trihedral view showing a state in which vertical bars are inserted into the reinforcing beam support frame of the present invention and erected. FIG. 2 is a schematic cross-sectional view showing a state in which a reinforcing-bar beam is constructed by the reinforcing-bar-beam support frame of the present invention, cut along a plane perpendicular to the main reinforcing bars. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view showing a state in which a reinforcing bar beam is constructed by the supporting frame for reinforcing bar beams of the present invention, cut along a plane parallel to the main reinforcing bars;

The present invention is a base steel plate to be installed on a surplus concrete layer for constructing a reinforcing beam, and a helical steel plate to be installed integrally with a steel bar on the base steel plate and to insert a vertical bar for supporting the reinforcing beam. It consists of a vertical bar holder and a holder reinforcing bar that is integrally attached on the generatrix of this vertical bar holder to reinforce the holder form of the vertical bar holder. A support base for a beam, wherein the vertical bar holder has an enlarged bottom holder pedestal portion fixed to the base steel plate, a vertical bar inserting portion continuously rising spirally from one end of the holder pedestal portion, and the vertical bar inserting portion. It is composed of a U-shaped side overhanging portion that continues to the fitting portion and disposes the main reinforcement of the reinforcing bar beam at a distance, and a vertical bar holding portion that rises spirally continuing to the side overhanging portion, If it exhibits excellent construction strength and durability, can reliably and firmly support rebar beams, is highly efficient in storage and transportation, and is lightweight enough to reduce the work load on site, it will be Any embodiment may be used.

That is, the method of fixing the base steel plate, the vertical bar holder, and the holder reinforcing bars to each other may be any method as long as it has the required strength and satisfies the requirements for use in concrete construction. .

The shape of the base steel plate of the present invention may be a square, a trapezoid, or the like, other than a flat rectangle, as long as it is a shape that stably supports the vertical bar holders. A structure such as a reinforcing rib or projection for engagement or screw may be provided at a non-interfering position.

It is preferable that the spiral vertical-bar inserting portion and the vertical-bar holding portion constituting the vertical-bar holder of the present invention have a so-called double torsion shape in which the spiral winding directions are opposite to each other. In the case of the double torsion shape, it is possible to arbitrarily decide which configuration is the right (left) winding shape.

In addition, the spiral vertical-bar inserting portion and the vertical-bar holding portion, which constitute the vertical-bar holder of the present invention, stably support the vertical bars according to the vertical bars used for supporting the reinforcing-bar beam. The pitch and inner diameter of those helices can be determined so as to support .

Furthermore, the shape and dimensions of the lateral overhanging portion of the present invention are the maximum dimension between the first reinforcing column portion and the lateral overhanging portion in the width direction of the base steel plate, that is, the outer sides of the first reinforcing column portion and the lateral overhanging portion. can be set so as to be equal to or larger than the required gap size according to the diameter of the reinforcing bar of the main reinforcing bar and the maximum size of the coarse aggregate.

1 to 5, the configuration of a reinforcing-bar beam support frame 100 according to an embodiment of the present invention will be described below.
Here, FIG. 1 is a schematic perspective view showing a state in which a reinforcing-bar beam is constructed by the reinforcing-bar-beam supporting frame of the present invention, and FIG. 2 is a schematic perspective view showing the reinforcing-bar-beam supporting frame of the present invention. FIG. 3 is a schematic trihedral view showing a state in which longitudinal bars are inserted into the reinforcing bar support frame of the present invention and erected, and FIG. FIG. 5 is a schematic cross-sectional view showing a state in which a beam is constructed by cutting along a plane perpendicular to the main reinforcement, and FIG. It is a schematic cross-sectional view cut along a plane.

As shown in FIGS. 1 to 5, a large number of reinforcing beam support frames 100 according to the present embodiment are arranged at construction positions on the sacrificial concrete layer LC in order to construct the reinforcing beam RB. A base steel plate 110 installed on the discarded concrete layer LC, and a spiral vertical bar holder 120 for inserting a vertical bar VR for supporting the reinforcing bar beam RB integrally suspended from the base steel plate 110 by a steel bar. , and holder reinforcing bars 130 that are integrally attached on the generatrix of the vertical bar holder 120 to reinforce the holder form of the vertical bar holder 120 .

The base steel plate 110 is, as shown in FIG. 3(A) and the like, a rectangular flat iron plate having a thickness of 4.5 mm, a length of 100 mm, and a width of 50 mm. It is configured to stably support the reinforcing-bar beam support frame 100 in close contact with the sacrificial concrete layer LC when positioned and installed on the top.
The base steel plate 110 has a plurality of nail holes 111 near both ends in the longitudinal direction for fixing with nails after the reinforcing-bar beam support frame 100 is positioned.

The vertical bar holder 120 is formed integrally with a steel bar with a diameter of 6 mm on the base steel plate 110 in order to insert the vertical bar VR for supporting the reinforcing beam RB.
The vertical bar holder 120 has an enlarged bottom holder pedestal portion 121 fixed to the base steel plate 110, a vertical bar inserting portion 122 continuously rising spirally from one end of the holder pedestal portion 121, and the vertical bar inserting portion 122. It consists of a U-shaped side overhanging portion 123 that is continuous with the main reinforcement MR of the reinforcing bar beam RB and arranged in a spaced manner, and a vertical bar holding portion 124 that is continuous with the side overhanging portion 123 and rises in a spiral shape. It is

As shown in FIGS. 2 and 3A, the holder pedestal portion 121 is formed in an enlarged bottom shape elongated in the longitudinal direction of the base steel plate 110. is formed in a U-shape on the opposite side, and the vertical bar holder 120 is fixed and assembled to the base steel plate 110 by welding.

The vertical bar inserting portion 122 continuously rises spirally from one end of the holder pedestal portion 121 . The side protruding portion 123 is continuous with the vertical bar inserting portion 122 and protrudes outward in a U-shape. The vertical muscle holding portion 124 is continuous with the side projecting portion 123 and rises spirally.

The vertical reinforcement inserting portion 122 and the vertical reinforcement holding portion 124 each have an inner diameter of 30 mm and a helical pitch of 30 mm on the premise that deformed reinforcing bars with the reinforcing bar designation D25 (outside diameter of 29 mm) are used as the vertical bars VR. Each is set to 17 mm, which is the same as the average node spacing of deformed reinforcing bars.
The spiral winding direction of the longitudinal muscle inserting portion 122 is clockwise, and the spiral winding direction of the longitudinal muscle holding portion 124 is counterclockwise. For this reason, a so-called double torsion shape is formed in which coils directed in mutually opposite directions are connected via the side projecting portion 123 .

The holder reinforcing bar 130 is composed of a U-shaped reinforcing pedestal portion 131 fixed to the base steel plate 110, and a first reinforcing column portion 132 and a second reinforcing column portion 133 standing upright from both ends of the reinforcing pedestal portion 131, respectively, and has a diameter of 6 mm. is integrally formed by a steel bar.

The reinforcing pedestal portion 131 is arranged on the base steel plate 110 at a position that does not interfere with the above-described holder pedestal portion 121 and surrounds the vertical reinforcement insertion portion 122, and is fixed to the base steel plate 110 by welding. For this reason, the holder reinforcing bar 130 is firmly attached to the base steel plate 110 , thereby reinforcing the holder form of the vertical bar holder 120 . Also, the poured concrete adheres to the base steel plate 110 .

The first reinforcing column portion 132 and the second reinforcing column portion 133 are integrally attached to the generatrices of the spiral vertical bar inserting portion 122 and the vertical bar holding portion 124 that constitute the vertical bar holder 120, respectively. They are fixed to each other at a plurality of points by welding.

Here, the interrelationships of the dimensions and shapes of the side protruding portion 123, the vertical bar insertion portion 122, the vertical bar holding portion 124, the first reinforcing column portion 132, and the second reinforcing column portion 133 will be described.

As shown in FIGS. 3(A) and 3(C), the shape and dimensions of the side overhanging portion 123 are such that the vertical bar inserting portion 122, the vertical bar holding portion 124 and the second With respect to any of the reinforcing column portions 133, the positional relationship is such that the base steel plate 110 protrudes outward, and the maximum dimension in the width direction formed by the first reinforcing column portion 132 and the side projecting portion 123, that is, the second The distance between the outer sides of the one reinforcing column portion 132 and the side overhanging portion 123 is set to be equal to or larger than the minimum opening dimension of the reinforcing bar name.

In addition, as shown in FIG. 3(B), the dimensions and shape of the side overhanging portion 123 are such that, in the longitudinal direction of the base steel plate 110, the vertical bar inserting portion 122, the vertical bar holding portion 124, and the first reinforcing column portion 132 and within the dimension and shape of the space occupied by the second reinforcing column 133 , particularly within the dimension and shape of the space occupied by the first reinforcing column 132 and the second reinforcing column 133 .

Next, referring to FIGS. 1, 4, and 5, a concrete structure for constructing a reinforced concrete beam by arranging a reinforcing beam RB using the reinforcing beam support frame 100 according to the present embodiment. Explain the construction procedure.

First, on the ground surface G of the concrete placement space PS for constructing the reinforcing beam RB, a waste concrete layer LC is formed as a reference plane, and on this waste concrete layer LC, the support frame for the reinforcing bar beam according to the present embodiment is formed. 100 are arranged at predetermined intervals and nailed in nail holes 111 . At this time, as shown in FIGS. 1 and 5, the longitudinal direction of the main bars MR forming the reinforcing bar beam RB is aligned with the longitudinal direction of the base steel plate 110 forming the supporting frame 100 for the reinforcing bar beam.

Next, a vertical bar VR made of a deformed steel bar having a plurality of nodes arranged at regular node intervals is inserted into the vertical bar holding portion 124 from above, and further to the bottom of the vertical bar inserting portion 122. It is inserted and made to abut on the base steel plate 110 to stand upright. In the present embodiment, the spiral pitch of the vertical muscle inserting portion 122 and the vertical muscle holding portion 124 is set to be the same as the internode interval of the vertical muscle VR, thereby The helical structure forming the grip 124 engages the nodes of the inserted longitudinal muscle VR.

In addition, the first reinforcing column portion 132 and the second reinforcing column portion 133 are integrated on the generatrices of the spiral vertical bar inserting portion 122 and the vertical bar holding portion 124, respectively, which constitute the vertical bar holder 120. are attached to and fixed to each other by welding, and the holder form of the vertical bar holder 120 is reinforced at a plurality of places, so that when the vertical bar VR is inserted into the vertical bar holder 120 or after the insertion of the vertical bar VR to prevent deformation and buckling of the vertical bar holder 120 when an external force is applied to the vertical bar holder 120.

After that, the hairpin muscle HR is horizontally fixed at a predetermined height near the upper end of the vertical muscle VR using the hairpin muscle fixture RF, and the upper main reinforcement MR is arranged on the hairpin muscle HR. A spacer S is arranged at a predetermined position, and the lower main muscle MR, the abdominal muscle BR and the stirrup ST are arranged in order, and are tied and fixed to each other at a predetermined position.

When arranging the lower main reinforcement MR, as shown in FIG. 124, the first reinforcing column 132 and the second reinforcing column 133 are set to have a dimension and shape protruding outward with respect to the spatial region occupied by the first reinforcing column 132 and the lateral direction. The horizontally arranged main reinforcing bars MR cannot enter the spatial region between the projecting portion 123 and the projecting portion 123 . For this reason, the gap between the main reinforcing bars MR adjacent to the reinforcing bar support frame 100 is specified to be greater than or equal to the dimension from the outside of the first reinforcing column portion 132 to the outside of the side projecting portion 123 (60 mm in this embodiment). be.

Further, when the stirrups ST are arranged, as shown in FIG. 124, the first reinforcing column portion 132 and the second reinforcing column portion 133, and in particular, the dimension and shape of the spatial region occupied by the first reinforcing column portion 132 and the second reinforcing column portion 133. It's inside. For this reason, the region where the stirrups ST horizontally arranged near the vertical bar holder 120 cannot enter is the vertical bar holding portion 124, the vertical bar inserting portion 122, the first reinforcing column portion 132, and the second reinforcing column portion. 133, the reinforcing bar support frame 100 hardly interferes with the stirrups ST.

After constructing the reinforcing bar beam RB, when concrete is placed in the concrete placing space PS, the concrete is poured into the vertical bar from the gap formed by the spiral gap of the vertical bar holder 120 and the side projecting portion 123. It flows into the VR and adheres to it.
After that, curing completes the construction of reinforced concrete beams.

DESCRIPTION OF SYMBOLS 100... Support stand for reinforcing-bar beams 110... Base steel plate 111... Nail hole 120... Vertical-bar holder 121... Holder base part 122... Vertical-bar insertion part 123. .. Side projecting portion 124 .. Vertical muscle holding portion 130 .. Holder reinforcing bar 131 . ---- Vertical bar p0 ---- Vertical bar node interval p1 ---- Spiral pitch p2 of vertical bar-holding section --- Spiral pitch HR of vertical bar-holding section・・・・・・Kanzashi muscle RF・・・・・・Kanzashi muscle fixture RB・・・・・・Reinforcing bar beam MR・・・Main muscle BR・・・Abs ST・・・Stirrups S: Spacer G: Ground LC: Waste concrete layer PS: Concrete placement space

Claims (6)

A base steel plate installed on a surplus concrete layer for constructing a reinforcing beam, and a spiral vertical bar on which a vertical steel bar is hung integrally on the base steel plate and a vertical bar for supporting the reinforcing steel beam is inserted. A large number of reinforcing bar beams are arranged at construction positions on the above-mentioned surplus concrete layer, which are composed of holders and holder reinforcing bars that are integrally attached on the generatrices of the vertical bar holders to reinforce the holder form of the vertical bar holders. A support frame for
The vertical bar holder has an enlarged bottom holder pedestal portion fixed to the base steel plate, a vertical bar inserting portion spirally rising continuously from one end of the holder pedestal portion, and a vertical bar inserting portion continuous with the vertical bar inserting portion. It is characterized by being composed of a U-shaped side overhanging portion in which the main bars of the reinforcing bar beam are spaced apart and a vertical bar holding portion that rises spirally continuously from the side overhanging portion. Support cradle for rebar beams. The holder reinforcing bar comprises a U-shaped reinforcing pedestal portion fixed to the base steel plate, and a first reinforcing column portion and a second reinforcing column portion standing upright from both ends of the reinforcing pedestal portion, respectively. Item 1. A support frame for a reinforcing bar beam according to item 1. The support frame for a reinforcing bar beam according to claim 1 or 2, wherein the spiral winding direction of the vertical reinforcement inserting portion and the spiral winding direction of the vertical reinforcement holding portion are opposite to each other. . A deformed steel bar in which the longitudinal bars are provided with a plurality of nodes arranged at regular node intervals,
4. The spiral pitch of the vertical-reinforcement insertion portion and the vertical-reinforcement-holding portion is set to be the same as the internode spacing of the vertical reinforcement. support trestle for rebar beams. The dimensions and shape of the side overhanging portion are relative to the dimensions and shape of the space area occupied by the vertical reinforcement inserting portion, the vertical reinforcement holding portion, the first reinforcing column portion, and the second reinforcing column portion in the width direction of the base steel plate. 4. The support frame for a reinforcing bar beam according to any one of claims 1 to 3, characterized in that it has a dimension and shape that protrudes outward. The dimensions and shape of the side protruding portion fall within the dimensions and shape of the space area occupied by the vertical reinforcement inserting portion, the vertical reinforcement holding portion, the first reinforcing column portion, and the second reinforcing column portion in the longitudinal direction of the base steel plate. The support frame for reinforcing bar beams according to any one of claims 1 to 4, characterized in that