JPH055937U - Position maintaining device for column main bars - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce labor of the hoop reinforcement work in the beam-column joints so as not to reduce the rigidity of the beam steel frame. [Structure] In a column-beam joint portion, a beam bracket 2 attached to a column steel frame 1 surrounds a column steel frame and a column main bar 6
The position holding frame 3 which is also used as the hoop is attached.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a position holding device for holding a column main bar in a column-beam joint.

[0002]

[Prior Art]

 When constructing a building with a steel-framed reinforced concrete structure using the pre-assembled reinforcement method, there have been examples of using a column main bar position holding device. As this position-holding device, a position-holding bar that is bent in a quadrangle so as to surround the column steel frame is arranged in the beam-column joint, and multiple positions of this position-holding bar are welded to the iron piece protruding from the column steel frame. It was something that Before the construction of the building, at the factory or on-site, the main reinforcements of the pillars are arranged along the main pillars around the main pillars of the pillars, and each main pillar of the main pillars is welded to the inside of the four corners of the position holding bar with a number line or welded. Then, temporarily fix the hoop to the column main bar, and then set up the column steel frame with the column main bar held by the position-retaining rebar in front, connect the beam steel frame to the column steel frame, and then attach the hoop to the column steel frame. The bar was arranged at a predetermined position.

[0003]

[Problems to be solved by the device]

 According to the conventional example, since the hoop reinforcement in the beam-column joint is performed through the hoop insertion hole that has been opened in the beam steel frame in advance, it takes time and effort to insert the hoop at the site. In addition, holes for hoop insertion must be made in the web of the beam steel, which causes a decrease in the rigidity of the beam steel.

An object of the present invention is to save labor between the reinforcing bars of the hoop in the beam-column joint so as not to reduce the rigidity of the beam steel frame.

[0005]

[Means for Solving the Problems]

 The column main bar position maintaining device of the present invention has a beam bracket attached to the column steel frame at the beam-column joint part, and an end portion attached to the beam bracket, which surrounds the column steel frame and which is provided with a hoop of the column main bar. It is composed of a position holding frame which is also used. The position holding frame is composed of plates and reinforcing bars. The position holding frame is arranged in one stage or multiple stages.

[0006]

[Action]

 At the beam-column joint, the reinforcement of the hoop of the column steel frame is not required due to the existence of the position holding frame, and the position holding frame holds the position of the column main bar.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, a beam bracket 2 is joined to each flange at an upper end portion of a pillar steel frame 1 formed by combining T-shaped steels to form a plane cross shape. A position quadrangular frame 3 made of a plate is attached to the beam bracket 2 so as to surround the upper end of the pillar steel frame 1.

As shown in FIGS. 2 and 3, the position holding frame 3 is composed of a frame portion 3a composed of four plates, and each frame portion is bent in a plane L shape. Both ends of each frame portion 3a are assembled by bolts 5 to mounting plates 4, ... Which project from the web 21 of the beam bracket 2. Inside the four corners of the position holding frame 3, the column main bars 6, ... Are located and are stopped by binding the number wires or welding. The column main bars 6a are also arranged between the column main bars 6 located at the four corners, and the column main bars 6a are also fixed to the position holding frame 3. The position holding frame 3 has a role similar to that of the hoop 7, and is for omitting the bar arrangement of the hoop 7 on-site at the beam-column joint.

The web 11 of the pillar steel frame 1 is formed with a hole 11 a for penetrating the beam main bar 8 for inserting the beam main bar.

Next, the operation will be described.

In a factory or on-site, pillar main bars 6 are arranged on the outside of the pillar steel frame 1 in the direction along the flanges thereof, and the upper parts of the pillar main bars are passed inside the four corners of the position holding frame 3 and bound with a numbered wire. Secure the main pillars to the steel column. Similarly, the column main bars 6 a are also arranged and fixed to the position holding frame 3. Then, the hoop 7 is also temporarily fixed around the pillar main bars 6 and 6a.

After this, a pillar steel frame in which the column main bars 6 and 6a are assembled is erected, the beam is joined to the beam bracket 2, and the beam main bar 8 is penetrated into the hole 11a for inserting the beam main bar of the column steel frame 1. Then, the hoop 7 is arranged at a predetermined position. Due to the presence of the position holding frame 3, the column-beam joint does not require the reinforcement of the hoop 7. After that, formwork work and concrete placement work are carried out in sequence.

4 and 5 show another embodiment. In this example, a position holding frame 13 made of a reinforcing bar is used in place of the position holding frame made of a plate, and the position holding frames are attached in two stages at predetermined intervals in the vertical direction. Is different from the above example in that a plane L-shaped frame portion 13a and a U-shaped frame portion 13b are used. Other configurations and operations are the same as those in the above example, and therefore, the reference numerals of the present example are matched with the reference numerals of the above example in corresponding portions. The position holding frame may have three or more stages.

The embodiment shown in FIG. 6 is different from the above-mentioned examples in that the position holding frame 23 is composed of two frame portions 23a and 23b. The column steel frame 1 uses a square steel pipe. Other configurations and operations are similar to those of the first illustrated example.

[0016]

[Effect of the device]

 According to this invention, since the position holding frame is mounted so as to surround the column steel frame and also serves as the hoop in the column-beam joint, the work of arranging the hoop of the column-beam joint is unnecessary. In addition, since the labor of the bar arrangement can be saved and the hole for hoop insertion is not provided in the beam steel frame, the rigidity of the beam steel frame is not deteriorated.

[Brief description of drawings]

1 is a perspective view showing a first embodiment of the present invention,
A part of the column main bar and the hole for inserting the beam main bar are omitted.

FIG. 2 is an enlarged front view showing the first embodiment of the present invention.

FIG. 3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a plan view showing another embodiment of the present invention.

5 is a cross-sectional view taken along the line BB of FIG.

FIG. 6 is a plan view showing still another embodiment of the present invention.

[Explanation of symbols]

 1 Column Steel Frame 2 Beam Bracket 3 Position Holding Frame 6 Column Main Bar 7 Hoop 8 Beam Main Bar 11a Beam Main Bar Hole 13 Position Holding Frame 23 Position Holding Frame

Claims (1)

[Claims for utility model registration] [Claim 1] A beam bracket attached to a column steel frame at a column-beam connection part, and an end portion attached to this beam bracket and surrounding the column steel frame and a hoop of a column main bar. A position holding device for a column main bar, which comprises a position holding frame which is also used.