JP2003119960A - Assembly member for cage, and cage assembling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assembly member for a cage, which can employ, as a main bar joint, a machine joint different in screw structure, and facilitates screwing of a connecting bolt into a joint pipe of the main bar joint. SOLUTION: The assembly member is formed of a single bearing member 11 shaped like an annular belt, and a plurality of reinforcement guide members 12 shaped like the U letter in a plan view. The guide members 12 are fixed onto a peripheral surface of the bearing member at predetermined regular intervals, and their outer surfaces each form an opening 12a. Then, the main bar 3 having the joint pipe at its end is insertable from the opening 12a of the reinforcement guide member 12, and the main bar is axially movable and rotatable in the guide member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembly member for a main bar and a hoop bar used in a reinforcing bar car in civil engineering work and construction work, and a method for assembling a reinforcing bar car using the assembly member.

[0002]

2. Description of the Related Art Conventionally, in a reinforcing bar cage, a main bar and a hoop bar are connected and fixed by means such as welding or binding. Therefore, the main muscle was unable to rotate or move up and down. In addition, a method of assembling a reinforcing bar cage with a joint having a screw structure is also known.

[0003]

However, in a reinforcing bar cage in which the main bar and the hoop bar are fixed by connecting them by means such as welding or binding, this main bar is used to connect the ends of the main bar with a joint. Reinforcing bar joints that require axial movement or rotation cannot be used. In addition, gas pressure welding means are often used to connect the main bars to each other as a single unit.
This gas welding cannot connect the fixed steel cage.

Further, in the method of assembling the reinforcing bar car with the joint having the screw structure, it is necessary to match the threads of the main bars to be connected, and therefore, the reinforcing bar car is assembled while the main bars are connected with the joint having the screw structure. , Once separated and reconnected. In addition, a threaded joint requires a mark that can be identified.

Therefore, the object of the present invention is that the main bar is rotatable and can be moved up and down, so that mechanical joints of various screw structures can be used as joints of this main bar, and the rebar cage for assembling the rebar cage efficiently. The present invention is to provide an assembly member.

Further, another object of the present invention is to provide a method for assembling a reinforcing bar car which can be treated like connecting a single main bar even when connecting a plurality of main bars of a reinforcing bar car, and which does not generate tensile force or compression force. To provide.

Another object of the present invention is to provide a method of assembling a rebar cage in which the thread can be easily adjusted by making the main bar to be connected rotatable so that no mark is required.

[0008]

In order to achieve the above-mentioned object, the feature of the rebar cage assembly member according to claim 1 is that a ring-shaped support member is fixed to the outside of the support member at a predetermined interval. The reinforcing bar guide member includes a plurality of reinforcing bar guide members, and an opening is formed on the outer side surface of the reinforcing bar guide member. The main bar can be inserted through the opening of the reinforcing bar guide member.

Further, the feature of the method of assembling the reinforcing bar car according to claim 2 is that the assembling member of the reinforcing bar car according to claim 1 is used, and the assembly member is fixed to a holding column at a predetermined interval. Then, a step of assembling the holding column for holding the assembly member, a step of inserting and setting a main bar having a joint pipe at an end from an opening of the reinforcing bar guide member, and a reinforcing bar guide member of the assembly member A step of surrounding the opening of the main bar with a ring member to prevent separation of the main bar, and a step of incorporating a hoop bar on the outer periphery of the main bar at a predetermined interval, the main bar rotating in the reinforcing bar guide member. Yes, it is possible to move up and down.

Further, the feature of the method for assembling the reinforcing bar car according to claim 3 is that in the method for assembling the reinforcing bar car according to claim 2, the reinforcing bar guide is provided at an end portion of the main bar of the assembled reinforcing bar guide. One of the joint pipes is to be connected by a connecting bolt to a joint pipe provided at the end of the main bar of another assembled reinforcing bar guide.

Further, the feature of the method of assembling the reinforcing bar car according to claim 4 is that, in claim 3, multiple threaded female threads are formed on the inner surfaces of both joint pipes, and the outer circumference of the connecting bolt is formed. In which the same number of multi-threaded threads are formed at the same pitch as the female threaded section, and both ends of the connection bolt are screwed into both joint pipes to connect the main bars to each other.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. First, the structure of the assembly member 1 of the main bar 3 and the hoop bar 6 that form the reinforcing car cage will be described. As shown in FIGS. 1 and 2, this assembly member includes one support member 11 and a plurality of reinforcing bar guide members 12. Consists of. The support member 11 is a ring-shaped member made of a belt-shaped steel plate, and the guide member 12 is made of a plurality of iron members and fixed to the outer peripheral surface of the support member at a predetermined uniform interval. The shape of the reinforcing bar guide member 12 is
As shown in FIG. 1, it is U-shaped in plan view, the back surface of this guide member is welded to the outer peripheral surface of the support member 11, and the outer end surface of this guide member is an opening 12a. Reinforcing bars 13 are provided on the inner surface of the support member 11.
A space 14 is formed between the guide members 12 and has substantially the same width as the guide members. Reinforcing bar guide member 12
The main bar 3 described later can be inserted through the opening 12a.

Next, a method for assembling a reinforcing bar car using the reinforcing bar car assembling member 1 having the above-described structure will be described.
First, as shown in FIG. 3 and FIG.
Each of the upper and lower end portions of the holding column 2 of the book is inserted into the space 14 between the guide members 12 of the assembling member 1 and welded, and the two assembling members are held at predetermined intervals in the up-and-down method (actually, in the left-right direction). To do. Although FIG. 3 shows a vertically long standing state, in reality, it is assembled in a horizontally long horizontally standing state. The mounting positions of the holding pillars 2 are 90 degrees apart as shown in FIG. 4, so that the assembly member 1 is held by the four holding pillars.

Next, as shown in FIGS. 5 and 6, the outer diameter of the main bar 3 is smaller than the inner diameter of the reinforcing bar guide member 12, and the main bar 3 is inserted through the respective openings 12a of each reinforcing bar guide member 12. It can be inserted and set in the recess of the guide member. Then, joint pipes (for example, FD grips manufactured by the applicant) 4 are crimped and fixed to the upper and lower ends of each main bar 3. The joint pipe 4 will be described in detail later with reference to FIGS. The outer diameter of the joint pipe 4 is larger than the inner diameter of the recess of the guide member 12. Although FIG. 5 shows a drawing in which it is erected in the vertical direction, the actual assembly of the reinforcing bar car is performed horizontally. First, as shown in FIG. 5, the main bar 3 is set in the guide member 12 in the upper half of the assembly member 1 located at the left and right (upper and lower in the drawing, but actually left and right) ends, and the state shown in FIG. 5 is obtained. After that, the ring member 5 formed by bending the reinforcing bar into a semicircular shape is welded to the holding column 2 so that the main bar 3 cannot be separated from the guide member 12. Further, after the rebar cage in the state of FIG. 5 is half-turned to set the main bar 3 in each of the remaining guide members 12, the semicircular ring member 5 is welded to the holding column 2 as described above. Therefore, the set main bar 3 cannot be separated from the guide member 12.

The thus-assembled rebar cage is in the state shown in FIGS. 7 and 8, that is, by rolling the ring member 5 consisting of two rebars bent in a semicircular shape, the ring member Is welded to the four holding columns 2 and therefore
The main bar 3 is rotatable in the guide member 12 and movable in the axial direction, but cannot be separated from the guide member.

Thereafter, as shown in FIG. 9, a plurality of ring-shaped (or spiral-shaped) hoop muscles 6 are wound around and set on the outer periphery of the main muscle 3 located between the joint pipes 4 and 4. FIG. 9 also shows a state in which the reinforcing steel cage is erected, but in reality it is horizontally placed. Then, as shown in FIG. 10, the ring-shaped hoop muscles 6 are moved in the left-right direction and assembled at predetermined intervals. This hoop muscle 6 is welded to the holding column 2,
Since it is not welded to the main bar 3, the main bar is still rotatable in the guide member 12 and movable in the axial direction, that is, in the left-right direction. Naturally, the ring member 5 also constitutes a hoop muscle.

The above is the process of assembling one rebar cage by the main bar 3 and the hoop bar 6. In this way, one completed rebar cage is connected to another rebar cage positioned in the vertical direction and, if necessary, further connected to another rebar cage to reach a predetermined length, and then the well-known Thus, the formwork work is carried out, concrete is poured into this formwork, and thereby the composite structure such as columns and beams is constructed.

Therefore, a method of connecting a plurality of reinforcing steel cages to each other will be described with reference to FIGS. One of the rebar cages assembled by the above-mentioned process is lifted by a crane and is transported onto the other rebar cages installed previously. Therefore, as shown in FIG.
Descends in the guide member 12, and the joint pipe 4 provided at the upper end is in a state of engaging with each guide member of the assembly member 1. Therefore, as shown in FIG. 12, the joint pipe 41 provided at the upper end of the main bar of the previously installed reinforcing bar guide.
The joint pipe 4 provided at the lower end of the main bar of the reinforcing bar guide of the reinforcing bar cage carried in by the crane is brought into contact with the upper end surface of the above, and a part thereof is screwed into the female screw part of this joint pipe 41 in advance. The connecting bolt 7 is rotated to extend upward and is screwed into the screw of the joint pipe 4 located above as shown in FIG. 13, whereby the joint pipes 4 and 41 are connected. Of course, since the main bar 3 is rotatable, it is possible to connect the main bar 3 with the connecting bolt 7 while rotating the main bar. This connecting bolt 7 allows the joint pipes 4, 41
12 to 1 show the order of steps for connecting
4, in this connecting step, the main bar 3 is connected to the guide member 12
Since the inside can be moved up and down and rotated, it is possible to connect the main bars with the connecting bolts 7 while rotating the main bars. Further, since the main reinforcing bar 3 moves up and down, it is not necessary to contact the connecting side and the connected side simultaneously and evenly when suspending the reinforcing steel cage as in the conventional case.

In particular, as shown in FIGS. 15 to 17, the joint pipes 4, 4 having a multiple thread structure (four thread structure in the drawings)
With 1 and the connecting bolt 7, this connecting operation can be carried out very quickly. That is, both joint pipes 4, 4
Four threaded female parts 4a, 41a are formed on the inner surface of 1, and the same number of multi-threaded parts 7a are formed on the outer periphery of the connection bolt 7 at the same pitch as this female threaded part. A stopper 7b is formed at the intermediate portion of. Then, both ends of the connecting bolt 7 are screwed into the joint pipes 4 and 41 to connect the main bars 3 to each other. Since the number of rotations to be screwed in is using the joint pipes 4 and 41 having a four-thread screw structure and the connecting bolt 7 of the multi-threaded screw portion 7a, it is 1/4 as compared with the conventional connecting bolt having a one-thread screw. become. For example, in the case of the conventional single-thread bolt,
What was required to rotate can be completely screwed into the joint pipes 4 and 41 for a predetermined length in three rotations with this four-thread screw. Further, the difficulty and complexity of the screwing operation due to the pitch shift as in the conventional case can be eliminated by the rotation of the main bar and the vertical movement.

[0020]

According to the present invention, the rebar cage assembly member allows the main bar to rotate and move up and down. Therefore, mechanical joints of various screw structures can be used as joints for this main bar, and joint pipes can be used. It is easy to screw the connection bolt into. Furthermore, since the assembly member of the reinforcing bar car can be processed in the factory, it is possible to assemble the reinforcing bar car with the correct pitch of the main bars. Further, the assembly member of the reinforcing bar car can be changed depending on the diameter, length, quantity, weight and the like of the reinforcing bar of the main bar to be connected.

Also, in the process of assembling the reinforcing bar car, even when connecting a plurality of main bars of the reinforcing bar car, it can be handled like connecting a single main bar, so that a pulling force and a compressing force are not generated unlike the conventional case. In addition, the thread can be easily adjusted by making the main bar to be connected rotatable, and no mark is required. In particular, if a mechanical joint with multiple threads with a large lead angle is used together, the working time at the construction site can be greatly reduced.

[Brief description of drawings]

FIG. 1 is a plan view of an assembly member for a reinforcing steel cage.

FIG. 2 is a front view of an assembly member of a reinforcing bar car.

FIG. 3 is a front view showing a step of assembling a reinforcing bar car and incorporating a holding column.

FIG. 4 is a plan view of FIG.

FIG. 5 is a front view showing a step of assembling a reinforcing bar car, in the middle of setting a main bar of an assembly member.

FIG. 6 is a plan view of FIG.

FIG. 7 is a front view showing a process of assembling a reinforcing bar car, in which a main bar of an assembly member is set and the main bar is prevented from coming off.

FIG. 8 is a plan view of FIG.

FIG. 9 is a front view showing an initial state in which a hoop muscle is incorporated around a main muscle.

FIG. 10 is a front view showing a state in which hoop muscles have been assembled around the main muscles.

FIG. 11 is a front view showing a state in which the completed rebar cage is lifted.

FIG. 12 is a front view showing a state in which a reinforcing steel cage is lifted and carried onto another reinforcing steel cage.

FIG. 13 is a front view showing a state in which a reinforcing bar cage is lifted up and carried onto another reinforcing bar cage and connection is started by connection bolts.

FIG. 14 is a front view showing a state in which a reinforcing bar cage and another reinforcing bar cage are connected by connecting bolts.

FIG. 15 is an enlarged cross-sectional view showing a state in which joint pipes are connected to each other by connecting bolts.

FIG. 16 is an enlarged front view of the connection bolt.

FIG. 17 is an enlarged side view of a connection bolt.

[Explanation of symbols]

1 Assembly member 12 Reinforcing bar guide member 12a Reinforcing bar guide member opening 2 holding pillars 3 main lines 4,41 fitting pipe 5 Ring member 6 hoop muscles 7 Connection bolt

Claims (4)

[Claims] 1. A rebar guide member comprising a ring-shaped support member and a plurality of rebar guide members fixed to the outside of the support member at predetermined intervals, wherein an outer surface of the rebar guide member has an opening. An assembling member for a reinforcing bar car, wherein a main bar can be inserted through the opening of the member. 2. An assembly member for a reinforcing steel car according to claim 1, wherein the assembly member is fixed to a holding column at a predetermined interval, and the holding column is assembled to hold the assembly member. A step of inserting and setting a main bar having a joint pipe at an end from an opening of the reinforcing bar guide member, and enclosing and bending the opening of the reinforcing bar guide member of the assembly member with a ring member to remove the main bar. A method for assembling a reinforcing bar car, comprising: a step of preventing the step; and a step of incorporating a hoop bar on the outer circumference of the main bar at a predetermined interval, the main bar being rotatable and vertically movable within the reinforcing bar guide member. 3. The method for assembling a reinforcing bar car according to claim 2, wherein the joint pipe provided at the end of the main bar of the assembled reinforcing bar guide is an end of the main bar of another assembled reinforcing bar guide. A method for assembling a reinforcing bar car, characterized in that the connecting pipe is connected to a joint pipe provided in the section. 4. The multiple thread female thread portion is formed on the inner surface of each of the joint pipes according to claim 3, and the same number of multiple thread thread portions are formed on the outer periphery of the connection bolt at the same pitch as the female thread portion. And a step of connecting both ends of the connecting bolt to both joint pipes to connect the main bars to each other.