JPH0426382B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a precision jig for pre-assembled reinforcing bars that can ensure joint accuracy between pre-assembled reinforcing bars at a construction site and improve work efficiency. It is.

(Prior Art) Various proposals have been made to save labor in frame work at construction sites and shorten the construction period.

One of them is steel beams in SRC structures,
Attempts have been made to assemble reinforcing bars, such as stirrups and hoops, on columns above ground in advance and then transport them to the construction location. According to this method, reinforcing work for beams and columns can be done on the ground. This makes the work more efficient and has the advantage of eliminating the dangers associated with reinforcing work at high places.

(Problem to be Solved by the Invention) However, in the above conventional example, beams and columns with pre-assembled reinforcing bars are lifted and installed at the construction site, and then connected to the pre-assembled reinforcing bars of other beams and columns at the construction site. There is work left to do.

Therefore, in the steel column part, the upper and lower steel columns are first joined to each other, and then the upper and lower ends of the column reinforcing bars of the previous set assembled to each are joined to each other. Even if the manufacturing accuracy is good, if the precision of pre-assembling the reinforcing bars for each steel column is poor, the ends of the upper and lower column reinforcing bars will be misaligned, making it difficult to join them together.

Normally, reinforcing bars are pressed together, but even in this case, it is not possible to deal with dimensional errors beyond a certain level.
Furthermore, in the case of so-called threaded reinforcing bars, in which the ends of the reinforcing bars are threaded, there is a problem in that if there is a positional shift, it becomes very difficult to join them together.

(Means for Solving the Problems) The present invention was proposed in order to solve the problems of the conventional art.
In the accuracy jig when pre-assembled reinforcement is arranged on the ground in advance in a lifting unit unit that integrates each steel frame column 2 of each layer and each steel frame beam 3 of at least one span, the distance between each steel frame column is The plate main body is installed at intervals corresponding to the distance of , a guide for positioning the steel column placed on the plate body, and a positioning pipe that can accurately determine the placement position of the main column reinforcement with respect to the steel column. This feature is characterized by a precision jig for pre-assembled reinforcing bars that can ensure accurate accuracy in pre-assembled work on the ground.

(Embodiments) Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

1 to 3 show one embodiment of the present invention, and FIG. 1 shows a pre-assembled reinforcing bar in which each steel column 2 for one layer and each steel beam 3 for multiple spans are integrated. The previous lifting unit 1 is shown.

In this case, the number of spans of the beam 3 is set so that it can be loaded on a transport vehicle to the site.

Therefore, when applying pre-assembled reinforcing bars to each of the steel columns 2 of the lifting unit 1 on the ground, a precision jig 4 for pre-assembled reinforcing bars shown in FIG. 2 is used.

The jig 4 includes a plate main body 5, a steel frame guide 6, and a steel frame pipe 7.

The plate body 5 is installed and fixed in advance in the ground work space in accordance with the distance L between each steel frame column 2, 2 in FIG. It is installed keeping the dimension L.

The steel frame guide 6 serves as a reference for placing each steel column 2 in an accurate position on each plate body 5 installed in the above positional relationship, and in this embodiment, Two triangular guides 6, 6, one of which the web can abut, are fixed at predetermined positions on the plate body 5.

The reinforcing bar pipe 7 is used for positioning to accurately determine the placement position of the column main reinforcement relative to the steel column 2, and the steel frame guide 6 ensures that the steel column 2 is placed at an accurate position on the plate body 5. If the main column reinforcement is inserted into each pipe 7 set according to the diameter of the column reinforcement, each reinforcement can be positioned accurately in advance so that it will be placed at a predetermined design position with respect to the steel column 2. and is fixed to the plate body 5.

Therefore, in this embodiment, each steel column 2 of the lifting unit 1 shown in FIG. 1 is placed at a predetermined position on the plate body 5 in line with the steel guide 6 as shown in FIGS. After that, the lower end of each column main reinforcement 8 is fitted and locked into each reinforcing bar pipe 7, and the column main reinforcements 8 are connected and fixed to each other with hoop reinforcements 9, completing the column head assembly, and further reinforcing the steel frame. Once the pre-assembled reinforcing bars (not shown) and other pre-assembled reinforcing bars for the third section of the beam have been assembled,
The unit lifting body 1 with pre-assembled reinforcing bars is lifted to a predetermined construction site, and each end of the steel column 2 and steel beam 3 is first connected to other columns and beams, and then the upper and lower steel frames are connected to each other in the column part. The upper and lower ends of the column main reinforcements 8 of the previous set, which are respectively assembled to the columns 2, are joined to each other.

At this time, the positioning of the column main reinforcements 8 with respect to the steel column 2 is done accurately as described above using the pre-assembled reinforcing bar precision jig 4, so the ends of the upper and lower corresponding column main reinforcements 8 match accurately. Mutual bonding becomes possible easily and quickly.

Therefore, even when a threaded reinforcing bar is used as the main column reinforcement, there is no possibility of positional displacement and difficulty in joining as in the conventional case.

In addition, the distance between the pre-assembled reinforcing bars of each column does not occur because the installation positions of the precision jig 4 for multiple pre-assembled reinforcing bars are set accurately in advance as described above. This solves the problem of the vertical positions of other column reinforcing bars being misaligned even if their vertical positions match.

Therefore, the precision jig 4 for pre-assembled reinforcing bars is particularly suitable for use in pre-assembled reinforcing bars of a lifting body in which a plurality of steel columns 2 are integrated, as in this embodiment. Of course, it can also be applied to other types of lifting bodies.

The number, shape, etc. of the steel frame guides 6 and steel frame pipes 7 in the precision jig 4 for pre-assembled reinforcing bars can be arbitrarily set according to the conditions, without departing from the gist of the present invention. It goes without saying that various modifications are possible.

(Effects of the Invention) The present invention is configured as described above, and can perform pre-assembled reinforcing bars for each steel column with extremely high accuracy, and prevents misalignment of the joints between the upper and lower pre-assembled reinforcing bars at the construction site. Therefore, it can be constructed easily and quickly, and it is possible to improve process efficiency and construction accuracy.

[Brief explanation of drawings]

1 to 3 show an embodiment of the present invention,
FIG. 1 is a schematic diagram of a lifting unit according to this embodiment, FIG. 2 is a perspective view showing the configuration of a precision jig for pre-assembled reinforcing bars, and FIG. 3 is an explanatory diagram showing its usage mode. 1...Lifting unit, 2...Steel frame column, 3...Steel beam, 4...Precision jig for pre-assembled reinforcing bars, 5...Plate body, 6...Steel frame guide, 7...For reinforcing bars Pipe, 8...Column main reinforcement.

Claims (1)

[Claims] 1. In a precision jig when placing pre-assembled reinforcement on the ground in advance in a lifting unit that integrates multiple steel columns and steel beams of a structure, the spacing corresponding to the distance between each steel column shall be set. Accuracy for pre-assembled reinforcing bars characterized by comprising: a plate body installed in the steel column; a steel frame guide for positioning the steel column; and a steel frame pipe for positioning the column main reinforcement with respect to the steel column. jig.