JP2665417B2 - Pillar formwork, rebar connection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for press-contacting a column in a suspended state in a column formwork and rebar pre-assembly method.

[0002]

2. Description of the Related Art Conventionally, in this type of construction method, a method of crimping a column rebar by independently pre-assembling a column form and a column rebar, and a method of simultaneously pre-assembling a column form and a column rebar, There has been a method in which four main pillar press-contact portions at four corners of a form are opened, and a main bar press-welding operation is performed from the opening, and then a formwork process is performed.

[0003]

When the former column formwork and the column reinforcing bar are individually pre-assembled, it takes much time and effort compared with the case where the column formwork and the column reinforcing bar are pre-assembled simultaneously. Since it is necessary to push up the hoop bar for the pressing operation of the reinforcing bar, it takes time and effort. In the latter case, since the column reinforcement is pressed from the opening provided in the column formwork, the formwork is partially burned, and it takes time to process the useless formwork.

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned problems of the prior art. It is an object of the present invention to provide a column formwork and a reinforcing bar joining method with improved workability and improved construction accuracy. The point is to provide.

[0005]

According to the present invention, there is provided a column formwork and a reinforcing bar joining method according to the present invention, wherein a pair of a preformed column reinforcing bar and a column formwork are used as a pair. After being transported to the position and suspended in a suspended state, only the column main bars at the four corners of the column are slid down with respect to the column formwork and pressed against the existing main bars, and then the suspended column formwork and other column rebars are lowered. Is fixed at a predetermined position.

[0006]

According to the present invention, a pair of pre-assembled column rebars and column formwork are provided as described above, and the column main rebar is slidable with respect to the formwork. And the column form is brought into a predetermined position and suspended in the air,
Slide only the column main bars down to the column formwork,
It is to be fixed to the existing main reinforcement. At this time, the column bars are pressed in a suspended state, so that the vertical accuracy is good.

[0007] Thereafter, the suspended column form and other pillars are lowered and fixed at predetermined positions, so that the pre-assembled column form, The rebar joining work is performed efficiently.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. Reference numeral 1 denotes a pillar main bar at the four corners of the pre-assembled column, and a reinforcing bar suspension 2 is attached to an upper end thereof. Numeral 3 denotes a hoop rein which is wound around another column main bar 1 ', and is provided between the hoop rebar 3 and the reinforcing bar restraining hardware 4 fixed at the four corners of the column, at the four corners of the column. The main bar 1 is slidably inserted.

The reinforcing steel restraint 4 has a flat steel main plate whose both ends are twisted by 90 °, a free end of the twisted portion 4a is provided with a gripping portion 4b having a partially circular shape, and the gripping portion 4b is hooped. The gripping portion 4b is fitted to the hoop muscle 3 by being inserted into the muscle 3 and hitting in the direction of arrow F, so that the reinforcing bar restraining hardware 4 can be easily attached to the four corners of the hoop muscle 3. (See FIGS. 5 and 6) A suspension wire 5 for sliding is attached to the upper part of the reinforcing bar suspension 2, and the wire 5 is inserted through a wire insertion hole 6a of a column-suspending jig 6 having a rectangular frame shape. The distal end of the wire 5 is wound around a hand winding device 8 with a stopper attached to the lower part of the assembled column formwork 7. In the figure, reference numeral 5 'denotes a hanging wire for a column formwork.

The column main bars 1 ′ other than the column main bars 1 at the four corners of the column are connected to a reinforcing bar hanging metal 9 suspended from a column hanging jig 6. Four suspension rings 10 are disposed above the column suspension jig 6, and a sling wire is attached to each suspension ring 10 when the column is suspended by a crane or the like. The pre-assembled column rebar and the column formwork are conveyed to a predetermined position by a crane or the like, suspended from the floor to a height of about 1.2 m, and suspended in a suspended state.

Next, the main rebar 1 at the four corners of the pillar is slid to the pressure contact position by the manual winding device 8, and a pressure welding jig is mounted. After the pressure welding of the column main bar 1 is completed, the pre-assembled column bar and the formwork are suspended using a crane or the like. At this time, the other pillar main bar 1 'is a lap joint. After the entire column has been installed at a predetermined position in this manner, the reinforcing bar hanging hardware 9 and the hand winding device 8 with a stopper are provided.
Remove and complete a series of steps.

[0012]

As described above, according to the present invention, a pair of pre-assembled column rebars and column forms are carried into a predetermined position and suspended in a suspended state, and only the column main bars at the four corners of the column are column-shaped. After sliding down against the existing main reinforcement, the column formwork and other column reinforcements are lowered and fixed in place, eliminating the need for processing the useless formwork as in the conventional method. The workability is improved. Further, since the main reinforcing bars at the four corners of the column can be pressed against each other while the pre-assembled column reinforcing bar and the column form are suspended in the air, vertical accuracy is good.

Further, according to the present invention, since the work can be concentrated at the pre-fabrication processing site, the work efficiency is good, and the work on site is reduced, so that the work is not affected by the weather.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of a column formwork and a reinforcing bar joining method according to the present invention.

FIG. 2 is a partial door plan view showing a pillar main bar mounting portion at four pillar corners.

FIG. 3 is a side view of a reinforcing bar restraint.

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is a plan view showing a state immediately before the reinforcing bar restraining fitting is attached to the hoop bar.

FIG. 6 is a plan view showing a state at the time of completion of attachment of a reinforcing bar restraint to a hoop bar.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 Pillar main bars at four corners 1 'Other pillar main bars 2 Reinforcement hanging hardware 3 Hoop bar 5 Hanging wire for slide 5' Hanging wire for column form 6 Column hanging jig 7 Column form 8 Hand winding device with stopper 9 Reinforcing bar Hardware 10 Suspension ring

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masaaki Hoshino 4-6-15 Sendagaya, Shibuya-ku, Tokyo Inside Fujita Co., Ltd. (72) Inventor Takayuki Eto 4-6-115 Sendagaya, Shibuya-ku, Tokyo Fujita Co., Ltd. (72) Inventor Hidetaka Nishioka 4-6-1 Sendagaya, Shibuya-ku, Tokyo Fujitanai Co., Ltd. (72) Inventor Sadatoshi Higa 4-6-1-15 Sendagaya, Shibuya-ku, Tokyo Fujita Co., Ltd. (72) Invention Person Takashi Okada 4-6-1 Sendagaya, Shibuya-ku, Tokyo Inside Fujita Co., Ltd. (72) Inventor Tadahiro Sugawara 4-6-1-15 Sendagaya, Shibuya-ku, Tokyo Fujita Co., Ltd. (56) References JP-A-3-3- 279566 (JP, A) JP-A-63-47469 (JP, A)

Claims (2)

(57) [Claims] 1. A pair of pre-assembled column rebars and column forms are carried into a predetermined position and suspended in a suspended state, and only the column main reinforcements at the four corners of the column are slid down with respect to the column forms. A column formwork and a reinforcing bar joining method, wherein the column formwork in a suspended state and the other column rebar are lowered and fixed at a predetermined position after being pressed against a main reinforcement of the column. 2. The pillar according to claim 1, wherein the pillar main reinforcement at the corner of the pillar is slidably inserted between the hoop rebar and the reinforcing bar restraining bracket fixed between the corners of the hoop. Formwork, rebar joining method.