JPH03151463A - Assemblying apparatus of steel rod structure - Google Patents

Abstract

PURPOSE: To reduce the costs by assembling steel bars while a dolly fitted with frames is moved along a rail. CONSTITUTION: Steel bars are placed on a cart 7 fitted with frames 8 and 9 in A-form. Auxiliary bars are assembled using steel bar material while the cart 7 is moved along a rail 11 or 12. The cart 7 is moved to other area and main bars are supplied, and the two sorts of bars are connected together in specified positions using clips so that a preliminarily assembled steel-bar structure is erected. The steel-bar structure is put down in another area, and the cart 7 is moved for placing of steel bar material again.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a reinforced structure used for constructing columns, beams, struts, girders, etc. This type of rebar assembly is performed either at the site where construction is taking place or at a factory where the prepared rebar is transported to the construction site and arranged or assembled at a predetermined location.

[Conventional technology]

In the reinforcing bar assembly method carried out on site or in a factory, first,
Performs cutting and forming operations to create the various wire rods required for assembling reinforcing bars. Next, these various wire rods are placed on a stand or trestle bent, where the reinforcing bars to be assembled are pre-assembled. Next, the worker connects the joints of the reinforcing bars to be preassembled at the work site. During this time, the reinforcing bars to be preassembled are fixed to the cradle, and one or more workers move along the long sides of the cradle until all required connections have been joined. form.

M+René Koharu Nasu 17 1→Hasayakoji and others manually position the wires at each connection point, and then use pliers, nail pullers, etc. to position the wires manually.
The strands are twisted together using a tool such as .

Conventional methods require specialized workers, called assemblers or rebar workers, who typically have a high level of productivity, processing 45 to 50 kg, or even 60 kg, of rebar per person per hour. This traditional assembly method has high production costs, particularly high costs of skilled labor, and a shortage of skilled labor due to the need for this type of labor in all construction projects, leading to increased production costs. There was a problem with that.

Recently, preformed clips have been used that are attached to the intersections of the main reinforcing bars and the ribs. The clip has protrusions that can be pinched with a tool, and the tool automatically twists the protrusions together until the clip is completely closed.

Thus, the advantage of using lips and automatic laying tools is that they do not require highly skilled labor and can be performed by less skilled workers or even apprentices. In this case, although the production efficiency is similar to the conventional method, it is superior in terms of securing personnel and recruiting suitable personnel.

It is also known to weld prefabricated reinforcing bars at the connection points by skilled workers. In this type of welding, whether with or without flux, the production efficiency in kg per person per hour remains at a maximum of 60,
Although welding reinforcing bars is more durable, it is not preferable.

Although there are some differences, in either method, the worker performs the work while moving along the reinforcing steel structure. The reinforcing steel structure, on the other hand, remains fixed until it is fully bonded and can be assembled or transported. Thus, in the conventional method, these two fixed ideas exist. In other words, the reinforcing bars remain stationary and the workers move. It is also generally known that productivity has a limit, and as mentioned above, the maximum amount is about 60 kg per person per hour.

An assembly method using a flexible machine, etc., with an area for the main reinforcement of an arrayed reinforcement structure and another adjacent area for the stacked sub-reinforcement reinforcements, has been proposed by a French patent in the name of LAFONI. It was recently disclosed by US Pat. No. 8,414,888.

In this assembly method, the main reinforcement is pulled between the stacked ribs, the ribs are picked up one by one, and connected in the conventional manner until the reinforcing bar structure is completed.

Such methods are complex in and of themselves, as are the ways in which reinforcing structures are formed. In other words, this method is not likely to be used in practice since it is neither cheaper (nor does it provide improved productivity) than conventional methods.

It is an object of the present invention to be able to increase the assembled quantity of reinforced structures by at least 30% and possibly even more than 50%, all things being equal, even taking into account the depreciation or repayment of equipment and tools. An object of the present invention is to provide a manufacturing method that significantly reduces the cost of a completed reinforced steel structure.

Another object of the present invention is to provide an automatic or semi-automatic assembly device that can move reinforcing bars for pre-assembly and main assembly, and in which the reinforcing bars are moved in front of the worker's work area without the worker having to move. It's about doing.

To practice the present invention, a preformed lip is first positioned by a worker or operator before use of the clip and the twisting tool. Each worker is provided with an automatic twisting machine and enough clips to place each reinforcing bar connection. Cutting and forming reinforcing steel materials are
It is carried out in a manner similar to conventional methods, and the gist of the present invention is after the reinforcing material has been formed.

The gist of the invention is to use a set of trolleys or carts provided with a trestle or A-shaped frame on which pre-formed reinforcing material is placed, and to provide the trolleys with a suitable structure capable of moving along rails, in at least one direction. It is equipped with a mechanism. After properly cutting and forming the heavy reinforcing material,
Preliminary assembly of the reinforcing steel structure is carried out on a pedestal mounted on a trolley.

Each of the cars is thus moved along the rails of this preassembly area to another rail. This separate rail location is provided with a mechanism that allows the trolley to move at variable speeds, and this mechanism is adapted to work in conjunction with a moving mechanism provided at the bottom of each of the trolleys. Line (b
The inding line is equipped with a variable speed drive, the output shaft of which connects to an endless chain of approximately the same length as the rail. This endless chain engages with a protrusion provided on the truck to move the truck along the assembly track.

In this assembly truck, the reinforcing bars placed on the trolley move around at a constant speed, while the worker moves without moving.
Clips and a twisting machine are used to connect the reinforcing bars at their joints as each section passes in front of the work station.

Generally, it is clear that an increase in production can be achieved by increasing the number of workers, but the number of workers is not logically constant.

As mentioned earlier, the lateral movement speed of the cart carrying reinforcing bars is not constant, but is determined depending on the number of workers or workers.
The speed of the truck decreases as the structure of the reinforcing bars becomes more complex and the number of connections at each part of the reinforcing bars increases.

At the end of the work truck, the reinforcing bars according to the invention are fully assembled and can be incorporated into inventory or loaded onto freight cars or the like. The main bars and sub-bars for assembling reinforcing bars on site are placed on a trolley at the beginning of the work, and once the reinforcing bars are assembled,
The main reinforcing bars and cost reinforcing bars are secured so that they can be secured until assembly on site.

After unloading the reinforced structure from the trolley, move the trolley to another area with rails adjacent to the work area.
The trolley is loaded with reinforcing material again before moving to another or first assembly line.

The possible combinations of work trucks and pre-assembly areas, together with loading and unloading areas, are endless and the space available, as will be explained later with reference to the accompanying drawings.
Logically it depends on variables such as the capacity provided to the assembly equipment.

In the pre-assembly area, the trolley may be provided with a mechanism for slow lateral movement towards the work truck, if desired, to allow workers above 1A to complete pre-assembly of the reinforcing structure during this movement. Good too.

Example J For the sake of clarity and by way of example, the accompanying drawings show an example of an apparatus for performing assembly according to the present application.

As is clear from FIGS. 1 and 2, the pre-assembled reinforcing bar structure basically consists of main bars 2 and ribs, or hoop bars 3.
It consists of. The main reinforcements and ribs are, for example, codes 4, 5, and 6.
They are connected to each other using pre-formed clips at the connection points shown. Clips are attached to these connection points.
It is placed together with a tool that twists the ends of the clip together.

In FIG. 3, a structure based on a frame or an A-shaped frame 8.9 is attached to use a reinforced structure. The trolley moves along the rails 11 and 12 using its own moving mechanism, which is not shown and can be composed of wheels, bearings, etc., for example.

FIG. 4 shows a pre-assembly area 13 in which the trolley carrying the reinforcing structure picks up the reinforcing bars and moves to an adjacent area 15 where the trolley engages a chain 18 driven by a variable speed drive 17. Typical equipment provided is shown by way of example. In this pre-assembly area, the worker or worker does not move and can connect the connection points in each part of the reinforcing steel structure as the reinforcing steel structure passes in front of the worker or worker. At the end of the journey, for example at 19, the reinforcing structure is completely finished and ready for storage or loading onto a wagon for transport to the site.

The trolley with the reinforcing steel structure unloaded moves to area 14, which may be another pre-assembly area, for example, from where it moves to area 16, where connections are made by another group of workers. .

Such order or order may be changed to make area 16
The return area for empty trolleys from the first preassembly area 13 may be dedicated, such a situation being the case, for example, when only one group of workers is available.

FIG. 5 shows an enlarged view of the pre-assembly area 13 and one position of the carriage 7 with its mounting frame. The symbol A indicates the direction in which the reinforcing steel material is placed on the frame that enters from the direction C.0 When the cart 7 is loaded with the preassembled reinforcing structure, it is moved in the direction B toward the connection line. .

FIG. 6 shows the trolley 7 (the frame and the reinforcing structure are not shown) mounted on the rails 11 in the connection area.

D and E are stoppers 23 and 2 provided on the trolley itself.
When the carriage is moved by the action of chains or rack rails 18 meshing with the carriages 2 and 2, in this embodiment the working stations of the workers are shown located on either side of the carriage.

FIG. 7 shows the final state of the built-up reinforcing material 20, which has been positioned on a reinforcing structure and has been connected thereto, in particular to the ribs 21, and already secured at other connection points.

FIG. 8 shows the completed state of the reinforcing bar structure, which has more connection points 24 in each part than the reinforcing bar structure shown in FIG. Rebar structures of this type, and of more complex or specialized types, can be processed by the means disclosed herein.

On the other hand, for reinforced structures of the type described above, under normal conditions a truck with a length of approximately 11 m has been found to be the most preferred size in practice.

The apparatus described above can be installed on rails provided on the flat part of the port. Install the device on a stand (
This can also be done spatially by placing an A-shaped frame (A-shaped frame) off the ground on a hook or the like.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a portion of a simple reinforcing structure, FIG. 2 is a perspective view of preformed ribs or hoops to be assembled into the reinforcing structure, and FIG. , is a perspective view showing a trolley on which a reinforcing steel structure is placed, and FIG.
An example of the layout of the device is shown in FIG.
Figure 4 shows the details of Figure 4, Figure 6 shows a schematic diagram of the trolley positioned on the rails of the connecting track, and Figure 7 shows the reinforcing steel structure assembled with the reinforcing materials used for assembly. It is a perspective view showing a part of the body. FIG. 8 shows a perspective view of a part of a more complicated reinforcing structure. 1... Pre-assembled reinforcing bar structure, 2... Main reinforcement, 3...
Ribs, 7...bogie, 8 and 9...frame, 11 and 12...rail.

Claims (1)

[Claims] 1) At least one worker attaches wire rods or clips to predetermined locations while moving along the reinforcing structure while fixing the reinforcing structure that is preassembled on a frame or the like; We create columns, beams, supports, etc. by twisting iron materials or clips together using a special twisting tool, using iron wire materials, cutting them to a specified size and bending them, and then assembling and connecting them to each other at specified points using frames, etc. In an apparatus for assembling reinforcing steel structures of the type that can be used to The movable trolley moves along the rail to the position of the work station without moving at least one worker or worker performing this connection work, and the movable trolley moves along the rail to the position of the work station, At least while in the connection area, the speed of the movable trolley can be varied depending on the type of reinforcing structure being fabricated and the number of workers, and the number of workers connecting the reinforcing structures The degree of simplicity of the structure and the speed at which the trolley moves can be varied, with workers preferably positioned on either side of the trolley during its movement to be able to connect the reinforcing structures. , an area where iron wires are placed on a stand attached to a trolley that moves along the rails for pre-assembly and assembly; There is a connection area that follows the loading area where the reinforcing steel structures are loaded, an unloading area where carts mounted on the rails can unload the completed reinforcing steel structure, and an area where empty carts pass towards the starting point on their way back. A device for assembling reinforced steel structures. 2. During the pre-assembly and assembly of the reinforcing steel structure placed on the pedestal attached to the said trolley, the trolley is stopped and moved towards the connection line so that the connection work can be started after these two operations are completed. The apparatus for assembling a reinforced structure according to claim 1, characterized in that the truck moves. 3. Reinforcing bars according to claim 1, characterized in that during the pre-assembly and assembly of the reinforcing steel structure placed on a pedestal attached to the trolley, the trolley moves very slowly towards the connection line. Equipment for assembling structures. 4. When the reinforcing steel structure is connected with the movable trolley, the trolley moves to the area where the reinforcing steel structure is placed, and the trolley becomes in a moving state. 2. A device for assembling a reinforced steel structure according to claim 1, characterized in that the reinforced steel structure is loaded, pre-assembled and moved towards an assembly area. 5. The apparatus for assembling a reinforcing bar structure according to claim 4, wherein the loading area and unloading area of the reinforcing bar structure are integrated into the same area. 6. In the loading area, the assembled steel for on-site assembly is connected to the inside of the reinforcing steel structure once the reinforcing steel structure is connected and before being unloaded from the trolley. An apparatus for assembling the reinforcing steel structure according to item 1. 7. Assembling the reinforcing steel structure according to claim 1 or 5, characterized in that the trolley is equipped with a mechanism that allows it to move back and forth while in the connection area and during connection. Device. 8. A rail is provided on which the trolley on which the trestle is mounted is mounted, and this trolley moves on the rail in the pre-assembly assembly area of the reinforcing steel structure, and the rail is in communication with other adjacent rails, and the rail is connected to other adjacent rails. A traction mechanism operated by a variable speed drive mechanism is provided between the rails, and a mechanism is provided at the bottom of the trolley that interlocks with this traction mechanism to move the trolley along the rail. characterized in that a separate area for unloading the reinforced structure is provided,
Equipment for assembling reinforced steel structures. 9. The device for assembling a reinforcing bar structure according to claim 8, wherein the traction mechanism of the truck is a chain that engages with a protrusion provided at the bottom of the truck. 10. Claim 8, characterized in that another bogie movement line is provided between the start end rail and the end rail, and a closed circuit is formed by guiding the empty bogie to the first loading area. Equipment for assembling the reinforcing steel structure described in paragraph. 11. The device for assembling a reinforced structure according to claim 8, characterized in that the length of the trolley with the frame is variable and is preferably about 11 m. 12. Claim 8 or 1, wherein the drive mechanism for driving the trolley traction mechanism is capable of changing its speed depending on the reinforcing structure to be manufactured and the number of workers.
An apparatus for assembling the reinforcing steel structure according to item 0.