JP3180709U - Reinforced steel fittings for cast-in-place concrete reinforcement bars - Google Patents

Abstract

Provided is a metal fitting for press-fixing instead of welding for use in the production of cast-in-place concrete reinforcing steel bars.
A metal fitting body having a rectangular shape in plan view having a flat portion is provided, and two bolt through holes are formed in the flat portion of the main body with a predetermined distance from each other, and are continuous from both ends of the metal fitting body. And an upper arcuate cutout at the center of the upper tongue, a lower tongue that descends at a position perpendicular to the upper tongue on both sides of the bracket body, and the center of the lower tongue Is provided with a lower arc-shaped cut portion. A presser plate made of a perforated rectangular plate is provided separately, a U-bolt having a male thread portion through which a bolt through hole and a presser plate hole can be inserted is provided, and two nuts that can be screwed into the U-bolt are provided.
[Selection] Figure 10

Description

  The present invention relates to a metal fitting for fixing a reinforcing bar used when manufacturing a reinforcing steel cage used for cast-in-place concrete resistance (excavation of a predetermined place at a construction / construction site and driving it into the concrete).

  Conventionally, cast-in-place concrete reinforcing steel bars have been assembled and manufactured by manual welding on site, and as shown in this proposal, there are no fixing brackets for pressing and fixing instead of welding means. .

In the case of construction such as the foundation of a pier construction, a hole is dug in a predetermined position on the ground, and a concrete bar is placed by inserting a reinforcing bar into the hole. This rebar cage is composed of annular hoops (finished in an annular shape by bending and welding the rebars) in a line at equal intervals, in contact with the inner surface of each hoop, and a linear rebar slightly thicker than the hoop material. The main reinforcing bar is bonded and fixed with a wire, and an annular assembly bar is located in contact with the inner surface of the main bar and welded to the main bar.
As described above, when assembling a place-resisting reinforcing bar cage, it was often temporarily fixed by welding. However, it is difficult to ensure the construction quality and there is a possibility that defects such as a reduction in the cross section of the reinforcing bar may occur. For this reason, welding should not be used in the future, and the current situation is that it is difficult to respond. In view of the above, the present plan is a newly developed metal fitting for pressing and fixing instead of welding means.

As a means for solving the problems, the present plan has the following configuration.
In other words, a metal fitting body having a rectangular shape in plan view having a flat surface portion is provided, and two bolt through holes are formed in the flat surface portion of the main body with a predetermined distance from each other, and rise continuously from both ends of the metal fitting body. An upper tongue piece is provided, an upper arcuate cut portion is provided at the center of the upper tongue piece, a lower tongue piece that descends at a position perpendicular to the upper tongue piece is provided on both sides of the metal fitting body, and a lower portion is provided at the center of the lower tongue piece. An arc-shaped cut portion is provided, a metal fitting body having the above-described configuration, and a presser plate made of a perforated rectangular plate are provided separately, and a U-bolt having a male thread portion through which a bolt through hole and a presser plate hole can be inserted is provided. Two nuts that can be screwed to the U-bolt are provided, and the above-described metal fitting body, the pressing plate, the U-bolt, and the nut are combined. The present plan is a cast-in-place concrete reinforcing bar cage made of the above-mentioned structure.

  According to the present plan, two kinds of reinforcing bars can be pressed and fixed in an orthogonal state, so that welding means such as the conventional method is not used, and thus a useful article that can prevent the deterioration of the quality of the reinforcing bars can be obtained. it can. Moreover, because of the pressing and fixing method, the rebar can be removed freely.

  Plan view of the bracket body of the present invention   Front view of the bracket body of the present invention   Left side view of the bracket body of the present invention   Plan view of the retainer plate of the present invention   Front view of the retainer plate of the present invention   Front view of the U-bolt of the present invention   Illustration of use of the present invention (plan view)   Illustration of use of the present invention (bottom view)   Illustration of use of the present invention (front view)   Illustration of use of the present invention

Hereinafter, embodiments of the present invention will be described.
In the figure, reference numeral 1 denotes a metal fitting body, which is formed by bending and cutting a rectangular iron plate having a predetermined thickness.
The metal fitting has a substantially rectangular shape in plan view, and two bolt through holes 2 are formed on the upper surface thereof at diagonal positions. Reference numeral 3 denotes an upper tongue, which is a portion that rises at a right angle continuously from both ends of the main body, and is provided on both sides of the main body. Reference numeral 4 denotes an upper arcuate cut portion, which is a substantially semicircular portion formed at the center of each upper tongue piece. Reference numeral 5 denotes a lower tongue piece, which is located at both ends of the main body at a position orthogonal to the upper tongue piece and descends at right angles continuously to the main body, and is provided on both sides of the main body. Reference numeral 6 denotes a lower arc-shaped cut portion, which is a substantially semicircular portion formed at the center of each lower tongue piece.
Reference numeral 10 denotes a pressing plate, which is a rectangular iron plate having a predetermined thickness, and through holes 11 are formed in the vicinity of both ends thereof. 12 is a U-bolt, and male screws are engraved on both ends thereof. A nut 13 has a female screw that can be screwed into a male screw of a U-bolt. The bolt through hole and the through hole have an inner diameter through which the U bolt can be inserted. The above is the configuration of each part of this plan.
In using the present plan, first, a main bar is applied to the upper arcuate cut portion of the upper tongue piece, and a U bolt is put on the cut portion, and the end of the U bolt is inserted into the bolt through hole of the metal fitting body. Next, the assembly line is applied to the lower arcuate cut portion of the lower tongue piece, a pressing plate is put on the assembly line, the U-bolt end is inserted into the through hole of the pressing plate, and tightened with a nut. With this tightening, the presser plate is pressed and deformed to press and fix the assembly bars, and the main bars are pressed and fixed with U-bolts. Therefore, both the reinforcing bars are crossed and fixed. This pressing and fixing is applied to a plurality of places as required.

As mentioned above, although this plan was described, since it is a press fixing means by screwing instead of the welding method that was the conventional means, the construction quality is constant, and there is no problem of cross-section reduction of the reinforcing bar that the welding method has, and it is useful It was possible to obtain a simple means.
In the description example, the tongue piece of the metal fitting body is bent at a right angle with respect to the flat surface portion, but may be other angles. The arcuate part of the upper tongue is adapted to the main muscle, and the arcuate part of the lower tongue is adapted to the assembly muscle, and the radius of curvature is determined according to the outer diameter of each reinforcing bar. Can be appropriately selected and processed according to the reinforcing bars to be used.
In addition, the holding plate is a rectangular plate in the example, but is not limited thereto, and may be a plate having another shape. However, since the fixing force is stably held by deformation due to pressing, the thickness is preferably in the range of 4 to 6 millimeters. This is because when the nut is tightened, the pressing plate is pressed and deformed in an arc shape, and the pressing points against the assembly bars having irregularities on the surface thereof are increased and stable holding is achieved. In this example, an iron plate is used for both the metal fitting body and the pressing plate, but a material having other strength may be used. In addition, when two assembly bars are used side by side, the shape of the arcuate cut portion is appropriately changed and formed in accordance with the reinforcing bar, such as a wide cut portion having an arcuate portion on its side surface. As described above, it is possible to obtain a working reinforcing bar fixing metal fitting for a cast-in-place concrete reinforcing steel cage that has convenience and contributes to improvement in product quality.

DESCRIPTION OF SYMBOLS 1 Metal fitting body 2 Bolt through-hole 3 Upper tongue piece 4 Upper circular arc cut part 5 Lower tongue piece 6 Lower arc cut part 10 Holding plate 11 Through hole 12 U bolt 20 Main reinforcement 21 Assembly muscle 22 Hoop muscle

Claims (3)

An upper tongue that is provided with a rectangular bracket body having a flat surface portion, and has two bolt through holes formed at a predetermined distance in the plane portion of the main body and rises continuously from both ends of the bracket body. In addition to providing a piece, an upper arc-shaped cut portion is provided at the center of the upper tongue piece, a lower tongue piece descending at a position perpendicular to the upper tongue piece is provided on both sides of the metal fitting body, and a lower arc shape is provided at the center of the lower tongue piece. A cut-out portion is provided, the metal fitting main body having the above-described configuration, and a pressing plate made of a perforated rectangular plate are provided separately, and a U-bolt having a male thread portion through which a bolt through hole and a hole in the pressing plate can be inserted is provided. A cast-in-place concrete reinforcing steel bar fixing metal fitting, comprising two nuts that can be screwed onto a bolt, and comprising a combination of the above metal fitting body, a holding plate, a U bolt and a nut. The cast-in-place concrete reinforcing bar cage for reinforcing cast-in-place concrete according to claim 1, wherein the arc-shaped cut portion provided in the upper tongue piece or the lower tongue piece is a non-arc-shaped cut portion. The cast-in-place concrete reinforcing bar cage for reinforcing cast-in-place concrete according to claim 1 or 2, wherein the holding plate has a non-rectangular shape.

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