JPS62288268A - Construction method for assembling reinforcing bar of support - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention [Field of Industrial Application] This invention relates to reinforcing bars that are the core of supports in reinforced concrete buildings, particularly to the set 1γ of stirrup bars. be.

[Conventional technology]

In general, the method of constructing and installing columns for reinforced concrete buildings is to place the base of the column at a position corresponding to the cross-sectional shape of the column and the inside of its outer circumferential surface. Weld the L bars erected at the desired positions with the required spacing between each other and extend them in one direction, passing each floor through L'Y,
Surround the outer periphery of this group of main muscles and go to the frame! A large number of hoops (HOOP) are tied together at a certain pitch, and after surrounding the outside with formwork, cement is poured in to form the supports.

However, conventionally, as shown in Fig. 7, the T method for assembling the tie bars to the pillars has been carried out by two to three skilled workers who have assembled the legs, I- Or use a stand or the like to store multiple IEs using chalk.
After marking pitch mark 3 on line 1, 1. Extrapolated to the first group of strips, the required number of tie bars 2 are prepared in a frame shape on one floor...
. . . Pick up one at a time and hold each main bar 1 and tie bar 2 at an appropriate point, holding them in sequence at the pitch mark 3 up to the L-story beam DoT. It was tied up and assembled.

(Problem to be solved by the invention) The conventional reinforcing bar assembly) R, I method was carried out using the following method, so workers had to adjust the tension of the frame-shaped stirrups mutually and hold them at a high place. Not only is there a danger of being blown away, but the force (l)
:'IG also causes fatigue to the workers.1-<, also,
It takes skill to tie up the hoop while keeping it at the pitch mark,
However, it is complicated and time-consuming because it involves descending ν1 onto the leg 1γ and marking the pitch several times, which poses serious problems in terms of work efficiency and safety.

This invention was made in consideration of the 1st sentiment of the writer...
The number of workers is small, and moreover, it is safe for beginners, and it can be carried out quickly. It is the first thing to do.

[Means for solving problems]

This invention installs a hoist on the following four first-story floors (1'I"11"r: 1), and uses the hoist to prepare the necessary number of stirrups prepared by extrapolating them to the L muscle group. This is the T-assembly method in which the required hoops are tied to one hoop after the hoops are hung one after the other via connecting hooks, and then the hoops are tied down to one hoop.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 6, taking as an example a case in which one square prism is assembled. Note that the same members and the like as in the conventional example are denoted by the same reference numerals, and their explanations will be omitted.

Figure 1 is a front view showing the state in which the required number of tie bars 2 for the current floor are arranged in a rectangular shape and hoisted along the T-bars L. 5 is fixed to the required pair of main bars L. 6 is a motor block type hoist suspended approximately at the center of the shaft 5; 7 is an operation switch for the hoist 6; 8 is a chain for hoisting the hoist 6; 9 is a A plurality of auxiliary chains 10 are connected to the chain 8 and have hanging hooks 9f for hooking the topmost strap 2a on the current floor, and then hang the strap 2 located in the F direction. Together with this, it is a connecting hook that regulates the vertical distance between the ties 2. Note that 8f is a main hook 8f that is attached to the tip of the hanging chain 8 via a buffering coil spring 8S and that engages the auxiliary chain 9 (11-). (See Fig. 6) In addition, as shown in the perspective view in Fig. 2, the hanging shaft 5 is attached to the hoist 6 at the center of the rod-shaped main body 5h.
Control F to move to 6. A pair of fittings 5t are fixedly attached to the main body 5h, and a pair of fittings 5u having a U-shaped cross section are slidably fitted to both ends of the main body 5h. On the outer surface of the mounting bracket 5u, there are attached main reinforcement tightening screws 5N that are clamped and fixed to the reinforcements 1 and 34. , 5 u
A body tightening screw 5n with a handle is provided at the center of each body for screwing the body 5h to position the metal fitting 5u.

As shown in FIG. 3, the connecting hook 1o forms a pair of hooks 10f at both ends that lock the straps 2, and the distance 1 between the centers of the hooks 10f is set to the L-stripe 1. The pitch is set to be equal to the pitch p of the tie reinforcements 2 when

Next, we will discuss the γ1 method (for reinforcing bars).

Usually T muscles! As shown in Figure 4, the cross section of the branch office to be installed on F5 of the current floor is q, and the shape is similar to that of the required 71.
- They are arranged at appropriate intervals at the apex and outer edge of a fairly small square, and are arranged in a line with a width of 800-1300 mm. Therefore, the ties 2 formed in an r-frame shape
(13mmφ) to the required number (height to 7th floor beam f ÷ p
) +'+; Main reinforcement 1 (25 to 19 mm)
After extrapolating to a group of φ), 1: Another main reinforcement 1 is added to each of the reinforcements 1 by welding, and the diameter of the ■reinforcement 1 that protrudes from the 1st floor beam F2 surface to a predetermined height is mm. A reinforcing bar column 11 is configured.

Next, in the beam F2 on the first floor, select a pair of L beams l located symmetrically with respect to the center of the square, and place the hanging shaft 5 so that its center, that is, the center of the pair of ribs 5t, is at the center of the square. Attach the mounting brackets J1.5 u to 1 each so that
Attach to the 1st three bars l marked 1f1° and secure with the T bar tightening screw 5N and the body tightening screw 5n.

Next, the hoist 6 is hung on the main body 5h of the hanging shaft 5 with the lower hanging bracket 6k and the pair of tails 5 in between 11-. By operating the operation switch 7, the suspension chain 8 was lowered and the auxiliary chain 9 was lowered, and a plurality of hanging hooks 9f were hooked from below to the required locations of the topmost strap 2a. After that, the operation switch 7 is used to slightly wind the hanging chain 8 and tension the auxiliary chain 9 in a balanced manner.

Then, when you gently lift the hanging chain 8,
Since the first part of the straps 2a starts to rise, the second and eleventh ties 2b and the first part of the ties 2a are connected by a plurality of connecting hooks 10 at an appropriate height.

By repeating the above operations in sequence and lifting the stirrups 2C, No. 3, No. 11, No. 4, No. 11, the stirrups 2d, etc., in a continuous manner, up to some of the stirrups 2a can be lifted. When the height of the F floor beam T is reached, all the stirrups 2 are staggered at a predetermined distance U, that is, a predetermined pitch p, and the reinforcing bar branches 11
The state surrounding is I+-.

Therefore, using the first floor beam F2 or leg qK, tie the northernmost stirrup 2a to an appropriate location, for example, the four corners of the rectangle or the main reinforcement 1 corresponding to the center of each side, using binding wires 4. to adjust the rectangular shape of the reinforcing bar support 11. In addition, if necessary, select a young F from the tie bars 2 located at an appropriate height and connect the tie wires 4 to the main bars 1.
Apply restraints.

As described above, the reinforcing bar assembly for the columns on the fifth floor is completed, so the set of hoist 6 and the hanging shaft 5 are removed, and the next upper floor is moved to continue the same reinforcing bar assembly method.

In addition, in this embodiment, although the square support was targeted, it goes without saying that it can be applied to a round support or a polygonal support.

In addition, according to the experimental results, in the case of 25 straps in the 4-stirring work of the base column and belt section, the skilled work of 3 fresh shellfish 'lS2
Compared to the conventional construction method, which required 60 to 70 minutes, the construction method of this embodiment required only 30 minutes by two unskilled workers. Compared to 90 minutes, the construction method of this example required only 40 minutes. Furthermore, when we estimated the construction cost, it was 5,000 to 7,000 in the conventional case, including the cost of binding wires per post and base.
In this example, the actual T'IF cost is 2,500 to 3,000 yen (excluding the initial cost of a complete hoist), including the cost of the connecting hook.

In addition, according to the construction method of this embodiment, even one unskilled worker can assemble the machine in one minute. The fact that \γ1; has been corrected.

In addition, for the set Aγ of relatively high supports used in an open-air hall, for example, as shown in Figure 6, the number of tie bars required for the 5th floor is divided into several appropriate groups, and each group is There is also a method of setting the tie bars 2 to the reinforcing bar columns 11 by lifting them one by one. 1j-, that is, the first 11F muscle group 21 is hoisted and set at the predetermined lowest position by the hoist 6, and then the auxiliary chain 9 is attached to the highest position of the hoist 22 in the second group 22.
Switch to step a and proceed to +Mf as described above.Follow the continuation, lower the second stirrup group 22 in a zigzag shape and hang it up. Once the hoist 6 approaches the highest hoist 21z of the group 21 within a predetermined pitch of 2, the hoist 6 is stopped. Then, after attaching the plurality of connecting hooks 1O to the required locations of the +IRF band reinforcements 21z and 22a, the hoist 6 is activated 111 to loosen the auxiliary chain 9, and the second reinforcement group 22 is connected to the first Strap muscle group 21
with a predetermined pitch p, and tie the required straps 2 of the second strap group 22 to the 1:stripe 1 with the binding wire 4 1"-4
- By doing so, the second strap group 22 is set to the reinforcing bar column 11.

By repeating the above steps 1 and 2 for the next group of reinforcing bars, it is possible to assemble the reinforcing bars for a long column.

Therefore, this reinforcing bar assembly method is suitable for r1 of other chimneys etc.
Needless to say, it is applicable to high-rise buildings similar to the shape or the shape of a hammer, and the higher the object, the greater the effect.

〔Effect of the invention〕

As explained above, according to the present invention, a small hoist is attached to a pair of reinforcing bars via a hanging shaft, and hooks are used to sequentially connect tie bars extrapolated to reinforcing bars made of a forest of IE bars. Reinforcing bar set 1γ is lifted in a staggered manner through
By providing this construction method, it is no longer necessary to use chalk to mark the pitch of the main reinforcing bars, and the stirrup bars can be hung in the form of a blind just by operating a simple operation switch, making work at heights much easier. It can be carried out even by unskilled workers, and it has many remarkable effects such as reducing the number of workers, halving the work time, construction cost, and worker fatigue, as well as greatly improving safety. It is something that was given.

In addition, the setting interval of each stirrup is determined by the connecting hook;
1, resulting in an accurate pitch that looks good, and hI!
I't j? It also has the advantage of equalizing the strength of each part of the Ct support.

[Brief explanation of the drawing]

FIG. 1 shows 117 lines 8 by applying one embodiment of the present invention.
dE surface showing the state in which T is suspended at a predetermined height, second
The figure is a perspective view of the hanging shaft, Fig. 3 is a side view of the connecting hook, Fig. 4 is a perspective view showing the initial state with L-shaped lines 3γ on the floor of the 5th floor, and Fig. 5 is Fig. 6 is a front view showing the reinforcing bar column in a state in which the reinforcing bar strut is constructed; The figure is an explanatory diagram showing the working situation according to the 17th method of reinforcing bars for conventional columns. !・・・・・・・・・Main reinforcement 2・・・・・・・・・Birth tie 4・・・・・・Binding wire 5・・・・・・−・Hanging shaft 6・・・...Hoist 9 ...Auxiliary chain 10 ...Connection hook 11 ...Reinforcement column 21 ...First band group Figure 7

Claims (1)

[Scope of Claims] For at least one group of tie bars formed in a pre-extrapolated required number of frames at the bottom of a reinforcing bar column consisting of a forest of main bars, (1) at the top of the reinforcing bar column; a step of attaching a hoist via a suspension shaft; (2) a step of locking an auxiliary chain of the hoist to the topmost stirrup of the group of stirrups; (3) a step of lifting the topmost stirrup with the hoist; The process of hoisting by connecting the next level of stirrups one after another using multiple connecting hooks and forming a sash shape; (4) When the topmost stirrup reaches a predetermined height, the hoist is stopped and the hoist is lifted up. Step of tying the upper stirrups and, if necessary, the stirrups of the required steps to the required main reinforcements with binding wires; (5) If necessary, attaching the next stirrup group to the first stirrup group mentioned above; After suspending it in the form of a sash by the same means as carried out, connecting it with a plurality of connecting hooks, applying the required binding, and assembling the ties, (6) If necessary, by repeating the above-mentioned means, A process for sequentially installing a plurality of stirrup groups; (7) A process for removing hoist-related members after the assembly of the stirrup groups is completed. Assembly method.