JP3161599U - Rebar fixing method improvement for tie bar holder. - Google Patents

Abstract

An object of the present invention is to improve a reinforcing bar holder and to provide a holder that can easily and reliably fix the position of a reinforcing bar. While maintaining the form of a reinforcing bar holder for easily positioning a connecting reinforcing bar, a cross-section reducing slit part that can be easily deformed is added to a beam part or a supporting part, or a through hole plate is provided. By reducing the plate thickness and inserting the reinforcing bar through the through hole, the mounting angle of the through hole plate part that is parallelly installed is changed by bending or turning the part manually to change the relative cross section of the through hole. It becomes a reliable positioning and fixing means by coming into contact with the rebar by the deformation reduction. [Selection] Figure 3

Description

  The present invention relates to a retainer device for reinforcing bars (tie bars) mainly for connecting structures in construction of reinforced concrete structures.

  In the case of reinforced concrete pavement as an example, when split construction is performed depending on the construction width and construction conditions of the construction machine, connecting rebars (hereinafter referred to as tie bars) are installed on the side to be pre-constructed, and combined with the pavement part to be constructed later The entire pavement is integrated and stabilized. This joint is also called a cold joint, and tie bars are typically used to connect and integrate each structure.

  The standard tie bar used in reinforced concrete split pavement uses deformed steel bar D22mm. Although the basic length is 1 m, in order to perform split pavement, it is divided into two parts, sockets (female threads) on one side, and screws on the other side. The tie bar with socket is embedded in the joint side at the time of prior construction, and the tie bar installation is completed by tightening the tie bar with male screw in the socket after construction. After that, the subsequent construction is performed and the structures are integrated.

  The conventional tie bar positioning / fixing method uses a dedicated tie bar stand in the longitudinal direction that is processed with a deformed steel bar D13mm called a chair. It is pre-processed so that the height position and street direction are set when a tie bar is placed and fixed with a binding wire. (Patent Document 1)

  A utility model has already been filed for a tie bar holder that makes tie bar installation easier. (Patent Document 2 Utility Model Registration No. 3151740) The inventor is a technician of a company that owns the rights of the utility model. The tie bar holder is a simple iron work product that is fixed by hanging from the arranged reinforcing bars, inserted into the through hole of the tie bar, and using gravity to position without any fixing material (bundling wire, etc.). The feature is that it can be fixed, and its feature is that the position in the longitudinal direction can be easily adjusted at any time. This tie bar positioning tool is most suitable for the slip form method used in paving work in recent years.

  There have been further requests from users who mainly use the set-form method as a traditional construction method. The tie bar holder was shaped when other assembly materials collided with the already positioned tie bar or when the tie bar (formwork) was in contact with the tie bar. There was a request that we would like to strengthen the fixation after positioning while maintaining it. In the set-form type construction method, a dam plate is installed at the end of the pavement, and the tie bar is abutted against the dam plate and fixed. The

JP-A-10-195810 Utility model registration No. 3151740

  The present invention is a further improvement plan for the above-mentioned utility model registration, and in the construction of reinforced concrete structures including concrete pavement, the development of a tie bar holder that has additional fixing requirements for tie bars in accordance with the above reported cases. I want to.

In order to achieve the above-mentioned object, the reinforcing bar holder according to the present invention is a reinforcing bar which mainly holds deformed steel bars (tie bars) embedded in concrete together with structural reinforcing bars that can be assembled in a lattice shape. The connecting rebar (tie bar) has a plurality of ring-shaped ridges projecting from the outer periphery of a rod-shaped steel material, and a ridge line connecting the ridges along the longitudinal direction on the opposing surface. A projecting portion, having a beam portion spanned between at least two adjacent longitudinal bars having a predetermined length, and supporting the connecting reinforcing bars at both ends of the beam portion Is provided with a through-hole through which the connecting rebar is inserted at the lower part of the support part, and a slit (cross-sectional reduction part) is provided in a part of the beam part to deform and fix it by artificially after inserting the tie bar. It features.
In addition, it is characterized in that a slit is provided in a part of the above support part, and it is deformed and fixed by human after insertion of the tie bar.
In addition, it is characterized by positioning and fixing the through-hole plate with the above-mentioned through-holes by artificial deformation after inserting the tie bar.

1. After the connecting rebar is inserted, it can be firmly fixed by changing the mounting angle of the support part through hole due to the deformation of the beam part.
2. Further, after the connecting reinforcing bars are inserted, the fixing angle of the support portion through-hole is changed by the torsional deformation of the support portion, so that it can be fixed firmly.
3． In addition, after the connecting reinforcing bar is inserted, the support portion through hole can be firmly fixed by changing the mounting angle of the support portion through hole due to the angular deformation of the through hole plate.
Four. In addition, it can also be used to assemble and fix round steel bars (slip bars) installed on expansion joints used for concrete paving and the like.
5). The chair member used conventionally can be omitted, and the economic effect is great.

  With this device, in addition to the above-mentioned registered utility models (hereinafter referred to as “utility models”), it is possible to selectively supply tie bar holders according to the construction environment, improving work efficiency in actual work, stable fixing when assembling tie bars, This has the effect of conserving the structural performance of reinforced concrete structures.

A general perspective view of the basic tie bar holder (hereinafter referred to as the holder) is shown below. Indicates a split-type rebar for connection (tie bar). (A) Reinforcing bar with internal thread socket (B) Reinforcing bar with external thread An example of the beam slit shape in the present invention is shown in a plan view. (A) Beam part slit example (B) Installation before beam part deformation (C) Installation after beam part deformation The plan view of the deformation at the support slit in the present invention is shown in the plan view. (A) is an example of a support part slit (B) is before the support part is deformed (C) is after the support part is deformed The form when the through hole plate is deformed in the present invention is shown in a plan view. (A) Before deformation (B) Fixed by deformation of through-hole part An example of a dedicated bending jig for beam slits is shown below. (A) Bending jig preparation (B) Bending completed Example of slit shape (A) Double-sided slit by square (B) Single-sided slit by square (C) Slit by circular arc (D) Slit by double-sided slit (E) opening hole

  Next, the reinforcing bar holder according to the present invention will be described in more detail based on the drawings showing the embodiments. For convenience, parts having the same functions are denoted by the same reference numerals and description thereof is omitted.

  A continuous reinforced concrete pavement will be explained as an example. Inside the structure, structural reinforcing bars (10), which are a combination of vertical bars D16mm (10a) and horizontal bars D13mm (10b), are arranged at a position 2/3 below the concrete thickness. The vertical bars are located at the top of the grid and the vertical bar spacing is 150 mm. The beam part (2) of the holder (1) has a predetermined length (standard length 200 mm) and is placed on at least two adjacent vertical bars. At both ends of the beam part (2), a support part (3) and a through hole plate (4) with a through hole (5) are provided. In the existing model, the shape of the through hole (5) was determined and the shape of the through hole was devised to enable simple positioning as a method using gravity. However, in the present invention, the through hole is slightly larger than the tie bar. It is an opening and does not matter the shape. In the following, a single round through hole is used as an example.

  In the method of fixing the beam part (2) to a rectangular shape, a cross-sectional reduction part (6) serving as a slit for easy deformation is added to the center of the tie bar holder beam part in advance along the above, and the tie bar is penetrated. After setting the insertion position through the hole, deform the beam (2) into a square and fix the connecting rebar (7). By making it square, the circle of the through hole (5) becomes relatively elliptical and is fixed by firmly contacting the tie bar. The standard beam part (2) and support part (3) are currently made of soft iron and have dimensions of 12.7mm in width and 2.9mm in thickness. If the diameter of the through hole (5) is 24.0 mm and the outside diameter of the peak of the connecting rebar (7) is 23.8 mm, it has been confirmed by experiments that the tie bar is fixed at a deformation angle of 16.4 degrees. If the beam length is 20 cm, the deformation (the center of the straight line is deformed into a square shape and the center is necessary for fixing) can be achieved by moving 29.5 mm. In order to artificially deform the beam part, it is possible to simply hit with a hammer or use a special bending jig (12).

  In addition, by adding a slit to the beam part of the holder devised in the existing utility model, a positioning method for both purposes combined with the present invention, that is, a method that enables adjustment at any time using gravity, or installation The method of fixing firmly at the time is a selectable holder.

The fixing method in which the support portion (3) is a horizontal torsion is formed by inserting the tie bar into the through hole in the holder (1) to which a slit (6) that is easy to deform is added in the center in advance along the above. After fixing, fix the tie bar by twisting the support part (3) horizontally. By turning the support part (3), the circle of the through hole (5) becomes relatively oval and fixed in contact with the tie bar. If the diameter of the through-hole is 24.0 mm and the outer diameter of the peak portion of the connecting rebar is 23.8 mm, it has been experimentally confirmed that the connecting rebar is fixed at 16.4 degrees. 4 degrees.
In order to artificially deform the support part, it is possible to use a monkey wrench or a dedicated bending jig.

The fixing method in which the through-hole plate (4) having the through-hole (5) is horizontally twisted has a plate thickness (1.6 mm thickness in the setting) in which the through-hole plate (4) is easily deformed in advance along the above. Insert the tie bar into the through hole in the holder (1), set the position, and then twist the through hole plate (4) horizontally to fix the tie bar. By turning the through-hole plate (4), the circle of the through-hole (5) becomes relatively oval and fixed in contact with the tie bar. If the diameter of the through-hole is 24.0 mm and the outer diameter of the peak portion of the connecting rebar is 23.8 mm, it has been experimentally confirmed that the connecting rebar is fixed at 16.4 degrees. 4 degrees.
In order to artificially swivel and deform the through hole plate (4), either a monkey wrench or a dedicated bending jig can be used.

About the cross-sectional defect | deletion part (6) used as the slit of this invention, the slit shape provided in a beam part and a support part may be any shape in the range which has a function by satisfying the following requirements, About the position Is not limited.
* Don't be deformed by impact when placing concrete in the slit due to a cross-sectional defect.
* Material that does not break during plastic deformation (eg, soft iron).

  In the present invention, there is no restriction on the shape of the through hole (5). Even if it is a square through-hole, turning the through-hole plate (4) makes the square of the through-hole (5) relatively rectangular and is fixed in contact with the tie bar by reducing the width. The same effect can be achieved with a U-shaped shape with part of the through hole (5) open.

   Already utility model products are currently manufactured from mild steel, but the retainer material can be organic or other materials with the above performance requirements.

  Reinforcing bar holders according to the present invention can be used not only for civil engineering of concrete pavement as an example, but also for construction related to reinforced concrete structures.

DESCRIPTION OF SYMBOLS 1 Tie bar holder 2 Beam part 3 Support part 4 Through-hole board 5 Through-hole 6 Slit 7 Connecting reinforcing bar 7a Connecting reinforcing bar 7b with socket Connecting reinforcing bar 8 with male screw Socket (female screw)
9 Male thread part 10 Lattice assembly rebar 10a Longitudinal rebar D16 rebar 10b Horizontal rebar D13 rebar 11 Beam shape deformation 12 Example of bending-only jig

Claims (3)

  Usually, a reinforcing bar holder for holding a reinforcing bar (tie bar) of mainly deformed steel bars embedded in concrete together with a structural reinforcing bar that can assemble vertical bars and horizontal bars in a grid pattern, A large number of ring-shaped ridges protrude from the outer circumference of the rod-shaped steel material, and ridges that connect the ridges along the longitudinal direction protrude from the opposing surface and have a predetermined length. In addition, at least a beam portion spanned between two adjacent vertical bars is provided, and a support portion for supporting the connection reinforcing bar is provided at both ends of the beam portion, and the connection reinforcing bar is provided at the lower portion of the support portion. A reinforcing bar holder having a through-hole to be inserted, provided with a slit (cross-sectional reduced portion) in the beam portion, and artificially deformed and inserted after tie bar insertion.     Usually, a reinforcing bar holder for holding a reinforcing bar (tie bar) of mainly deformed steel bars embedded in concrete together with a structural reinforcing bar that can assemble vertical bars and horizontal bars in a grid pattern, A large number of ring-shaped ridges protrude from the outer circumference of the rod-shaped steel material, and ridges that connect the ridges along the longitudinal direction protrude from the opposing surface and have a predetermined length. In addition, at least a beam portion spanned between two adjacent vertical bars is provided, and a support portion for supporting the connection reinforcing bar is provided at both ends of the beam portion, and the connection reinforcing bar is provided at the lower portion of the support portion. A reinforcing bar holder having a through-hole to be inserted, provided with a slit in a part of the support portion, and deformed and positioned and fixed artificially after insertion of a tie bar. Usually, a reinforcing bar holder for holding a reinforcing bar (tie bar) of mainly deformed steel bars embedded in concrete together with a structural reinforcing bar that can assemble vertical bars and horizontal bars in a grid pattern, A large number of ring-shaped ridges protrude from the outer circumference of the rod-shaped steel material, and ridges that connect the ridges along the longitudinal direction protrude from the opposing surface and have a predetermined length. In addition, at least a beam portion spanned between two adjacent vertical bars is provided, and a support portion for supporting the connection reinforcing bar is provided at both ends of the beam portion, and the connection reinforcing bar is provided at the lower portion of the support portion. A reinforcing bar holder having a through-hole to be inserted, wherein the through-hole portion is artificially deformed and positioned and fixed after the tie bar is inserted.

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