JPS6127387Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is a reinforcing bar assembly method for RC structures, in which small beam assembly reinforcing bars are erected between large beam assembly reinforcing bars.

[Conventional technology]

Conventionally, in the prefabricated reinforcing bar construction method, the construction of the small beam assembling reinforcing bars for the girder assembling reinforcing bars was performed by placing the girder assembling reinforcing bars C at predetermined positions in advance, as shown in Figures 1 and 2.
A pair of angles 1 with a portion near the lower end removed
2 are welded across the upper and lower major beam main reinforcements 9, while flat bars 13 to face the angles 12 are welded on both sides of the ends of the small beam assembly reinforcing bars B across the upper and lower minor beam main reinforcements 7. , Small beam assembly reinforcement B
This was done by hoisting the bar with a lifting machine and connecting the flat bar 13 and angle 12 with bolts and nuts. In the figure, reference numeral 11 denotes a top reinforcement that has been slid to a position across the girder assembly reinforcing bars after being connected using the bolts and nuts.

[Problem that the invention attempts to solve]

In the above method, it is necessary to suspend and support the small beam assembly reinforcing bars in a horizontal position using a lifting machine until the connection with bolts and nuts is completed.
Because high construction accuracy is required, workability during erection is poor.Furthermore, extremely high precision is required for welding flat bars and angles, making factory processing of assembled reinforcing bars that much more troublesome, resulting in low production efficiency. There were some drawbacks.

In view of these conventional drawbacks, the present invention has been developed to create a small beam assembly that can easily and quickly erect the small beam assembly reinforcing bars to the main beam assembly reinforcing bars by utilizing the weight of the small beam assembly reinforcing bars, thereby eliminating the conventional drawbacks. The purpose is to provide a jig for assembling reinforcing bars.

[Means for solving the problem] The present invention is characterized by a cylindrical part in which a part of the circumferential direction is open over the entire length in the axial direction, and a cylindrical part that extends from both edges of the opening to the outside of the cylindrical part. Consisting of a pair of flat plate parts that extend and are drilled with holes for the insertion of tightening bolts,
The cylindrical part of the first hardware is configured such that the cylindrical part can be fitted onto the main bar end of the small beam assembly reinforcing bar only from the longitudinal direction of the main bar, the bottom plate part, and a pair bent in the same direction from both ends thereof. a pair of arcuate plate portions each curved outward from the tip of each bent plate portion, and a hole extending from the tip of each arcuate plate portion for insertion of a tightening bolt. It consists of a pair of flat plate parts and a pair of guide plate parts extending outward from the tip of each flat plate part, and the main reinforcement of the girder assembly reinforcing bars is inserted between the arcuate plate parts.
The bottom plate part of the second hardware is configured to be able to be fitted from the guide plate side against the elastic restoring force of the bending plate part, and the bottom plate part is formed between the cylindrical part and the arcuate plate part. The purpose is to configure the small beam assembly reinforcing bar erection jig by fixing the space part in a three-dimensionally intersecting state.

[Effect]

The jig with the above configuration is designed to fit the cylindrical part onto the main bar end of the small beam assembly reinforcing bar from the longitudinal direction of the main bar, and to tighten the cylindrical part by inserting it into the hole in the flat plate extending on both edges of the opening of the cylindrical part. By tightening the flat plate parts with bolts, it can be attached to the main bar end of the small beam assembly reinforcing bar.

Thereafter, the small beam assembly reinforcing bars are suspended between the large beam assembly reinforcing bars using a lifting machine, and the second metal fittings of the jig attached to the main bar ends of the small beam assembly reinforcing bars are fitted into the main bars of the large beam assembly reinforcing bars. In this case, since the second hardware of the jig has the above-mentioned configuration, when the weight of the small beam assembly reinforcing bars is applied to the jig with both guide plates positioned on the main reinforcement of the main beam assembly reinforcing bars, the guide The space between the main beam assembly reinforcing bars is expanded by the main reinforcement of the girder assembly reinforcing bars, and the main reinforcement of the girder assembly reinforcing bars fits between the arcuate plates of the second metal part of the jig, making the self weight of the small beam assembly reinforcing bars effective. used.

In this state, a tightening bolt is inserted into the hole in the flat plate at the tip of the arc-shaped plate to tighten the space between the arc-shaped plates and fix the jig to the main reinforcing bars of the girder assembly.
Since the small beam assembly reinforcing bars are temporarily fixed to the large beam assembly reinforcing bars via a jig, it is possible to release the suspension support by the lifting machine, and the tightening bolts can be easily operated.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 3 shows a small beam assembly reinforcing bar erection jig A according to the present invention, and FIGS. 4 to 6 show how the jig A is used.

The jig A is composed of a first metal piece 1 and a second metal piece 2. The first hardware 1 includes a cylindrical portion 1a in which a part of the circumferential direction is open over the entire length in the axial direction;
It consists of a pair of flat plate parts 1b extending outward from the opening of the cylindrical part 1a and having a hole a for the insertion of a tightening bolt. It is configured so that it can be fitted onto the end of the main reinforcement 7 of the assembled reinforcing bar B only from the longitudinal direction of the main reinforcement 7. Second hardware 2
The bottom plate part 2a, a pair of bent plate parts 2b bent in the same direction from both ends thereof, and each bent plate part 2b...
A pair of arc-shaped plate portions 2 each curved outward from the tip of the
c..., a pair of flat plate parts 2d... extending from the tip of each arcuate plate part 2c... and having a hole b... for insertion of a tightening bolt, and expanding outward from the tip of each flat plate part 2d... It consists of a pair of extended guide plate parts 2e..., and the main reinforcement 9 of the girder assembly reinforcement C is connected to the arc-shaped plate part 2.
c... is constructed so that it can be fitted from the guide plate part 2e side against the elastic restoring force of the bending plate part 2b....

The cylindrical part 1a of the first hardware 1 and the bottom plate part 2a of the second hardware 2 are in a state where the space 3 formed between the cylindrical part 1a and the arcuate plate part 2c intersect with each other. Fixed by welding.

Next, using the above jig A, the small beam assembly reinforcing bar B
The procedure for installing the girder assembly reinforcing bars C will be explained.

First, as shown in FIG. 4, the jig A is fixed in advance near both ends of the main reinforcing bar 7 at the upper end of the small beam assembly reinforcing bar B. This work is performed by fitting the cylindrical part 1a of the first hardware 1 into the main reinforcement 7 from its longitudinal direction and tightening it with bolts and nuts 8, so it is necessary to elastically deform the cylindrical part 1a outward. This can be done with relatively light operating force.

Next, as shown in FIGS. 5 and 6, the small beam assembly reinforcing bars B are lifted by a lifting machine, and the main bars of the girder assembly reinforcing bars C are placed between the arcuate plate portions 2c of the second hardware 2 in each jig A. 9 is fitted from the guide plate portion 2e... side,
The weight of the small beam assembly reinforcing bars B is loaded and supported by the girder assembly reinforcing bars C via the jig A. In this case, since the guide plate parts 2e... are inclined to expand outward, when the weight of the small beam assembly reinforcing bars B is applied, the interval between the guide plate parts 2e... The bent plate portions 2b are pushed and expanded against the elastic restoring force. Therefore, the main reinforcing bars 9 can be easily fitted between the arcuate plate portions 2c by utilizing the weight of the small beam assembly reinforcing bars B.

After that, the second metal fittings 2 are tightened with bolts and nuts 10 to connect the small beam assembly reinforcing bars B to the main beam main reinforcements 9. When the main reinforcement 9 is fitted, the small beam assembly reinforcing bars B are supported by the main beam assembly reinforcing bars C at a predetermined level via the jig A.
In other words, since the small beam assembly reinforcing bars B are temporarily fixed at a predetermined level, there is no need to perform bolt tightening operations while suspending and supporting the small beam assembly reinforcing bars B at a predetermined level using a lifting machine, resulting in good workability.

In addition, 11 in Fig. 6 is a top reinforcement that is slidably supported by the small beam assembly reinforcing bar B, and after the small beam assembly reinforcing bar B is tied to the main beam main bar 9, it is slid to the position shown in the figure. .

[Effect of idea]

Since the small beam assembly reinforcing bar erection jig of the present invention has the above-described configuration, the workability during erection can be improved by using the jig.

That is, to fix the first hardware to the main bar end of the small beam assembly reinforcing bar, the cylindrical part is fitted onto the main bar end of the small beam assembly reinforcing bar from the longitudinal direction of the main bar, and is extended to both edges of the opening of the cylindrical part. This is done by tightening the flat plate parts with a tightening bolt inserted through a hole in the flat plate, so there is no need for the large operating force required to elastically deform the cylindrical part outward. The hardware is configured so that the main bars of the girder assembly reinforcing bars are fitted between the arcuate plates from the guide plate side against the elastic restoring force of the arcuate plates. The girder main reinforcement can be easily fitted between the arcuate plate portions of the second metal fittings by using the weight of the second metal fittings. Moreover, in this fitted state, that is, the state in which the small beam assembly reinforcing bars are supported by the main beam assembly reinforcing bars at a predetermined level via a jig,
Since the tightening bolts are inserted into the holes in the flat plates at the tips of the arc-shaped plates and tightened between the arc-shaped plates, there is no need to tighten the bolts while suspending and supporting the small beam assembly reinforcing bars at a predetermined level using a lifting machine. Easy bolt tightening operation.

As described above, according to the present invention, it is easy to fix the jig to the main bar end of the small beam assembly reinforcing bar, fit the jig to the main bar of the girder assembly reinforcing bar, and tighten the bolts. This improves work efficiency.

[Brief explanation of the drawing]

1 and 2 are a plan view and a side view showing a conventional example. FIG. 3 is a perspective view of a small beam assembly reinforcing bar erection jig showing an embodiment of the present invention. Figures 4 to 6
Figures 4 and 5 show how to use the jig.
The figure is a side view, and FIG. 6 is a plan view. A...Small beam assembly reinforcing bar erection jig, B...Small beam assembly reinforcing bar, C...Gear beam assembly reinforcing bar, a, b...hole, 1
...First hardware, 1a...Cylindrical part, 1b...Flat plate part, 2...Second hardware, 2a...Bottom plate part, 2b...
Bent plate part, 2c... arcuate plate part, 2d... flat plate part,
2e...Guide plate section, 3...Space section.

Claims (1)

[Scope of utility model registration request] A cylindrical part with a part in the circumferential direction open over the entire length in the axial direction, and a hole extending outward from both edges of the opening and for inserting a tightening bolt. The cylindrical part of the first hardware is configured such that the cylindrical part can be fitted onto the main reinforcement end of the small beam assembly reinforcing bar only from the longitudinal direction, the bottom plate part, and both ends thereof. A pair of bent plate portions bent in the same direction, a pair of arcuate plate portions each curved outward from the tip of each bent plate portion, and a tightening bolt inserted into the pair of bent plate portions extending from the tip of each arcuate plate portion. It consists of a pair of flat plate parts with a common hole drilled therein, and a pair of guide plate parts extending outward from the tip of each flat plate part, and the main reinforcement of the girder assembly reinforcing bars is inserted between the arcuate plate parts. The bottom plate part of the second hardware is configured to be able to be fitted from the guide plate side against the elastic restoring force of the bending plate part, and the bottom plate part is formed between the cylindrical part and the arcuate plate part. A jig for constructing reinforcing bars for small beam assembly, which is fixed to the space in a three-dimensional intersection.