JPH01104431A - Bending device for reinforced prefabricated unit - Google Patents

Abstract

PURPOSE:To execute bending with high workability by a small number of persons by allowing a bending supporting point to abut on a reinforced unit and fixing the bending supporting point by a bending supporting point supporting body, and bending the reinforced unit to a prescribed angle by driving a bending point of force. CONSTITUTION:An integral bending machine for bending a reinforced unit which is fed after binding is provided with a lifting beam 55 on which plural bending supporting points 30 are provided, and a fixed beam 56 on which plural bending force points 31 and a bending supporting point supporting body 32 are provided. By this constitution, the lifting beam 55 is allowed to descend, and the bending supporting point 30 is set to a reinforced unit 19 by a hydraulic cylinder 33. Subsequently, by a hydraulic cylinder 35, the bending supporting point supporting body 32 is fixed to the bending supporting point 30, thereafter, by an extension of a hydraulic cylinder 34, the reinforced unit 19 is bent to a prescribed angle by the bending force point 31. In such a way, an integral bending work of the reinforced unit 19 can be executed automatically.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for bending prefabricated units of reinforcing bars for making structures such as, for example, nuclear power plants.

[Conventional technology]

Conventionally, when constructing structures for nuclear power plants, most of the assembly of the reinforcing bars units had to be done manually, which involved arranging reinforcing bars at regular intervals, and arranging reinforcing bars vertically and horizontally. After that, the tying work that connects the vertical reinforcing bars to the horizontal reinforcing bars and the work of bending the mesh units were all done manually.

However, the reinforcing bars used in the structures of nuclear power plants are
They have a large diameter of about 38 cm, and many have a length of about 12 m, and are heavy (approximately 100 kr), making them difficult to work with (requiring a large number of people and the time required for assembly). It was also long.

However, in recent years, Japan's construction industry has faced an aging workforce and a shortage of skilled workers, and there is a need to improve on-site production methods. being developed.

[Problem that the invention seeks to solve]

However, although the above-mentioned equipment has been mechanized, it is only an automatic processing line for automatically arranging reinforcing bars or for assembling blind-shaped units; It does not automate the bending process, is not versatile, and has not been able to sufficiently increase productivity.

The present invention solves the above-mentioned problems, and is a reinforcing bar prefabricated unit applied to a system that automates the work of integrally bending a mesh unit and automates the entire process from design to product. The purpose of the present invention is to provide a bending device.

[Means for solving problems]

To this end, the reinforcing bar prefabricated unit bending apparatus of the present invention includes a lifting beam and a fixed beam provided opposite to the reinforcing bar unit, a bending fulcrum provided on the lifting beam, and a bending fulcrum provided on the fixed beam. A force point and a bending fulcrum support, and when the bending fulcrum is brought into contact with a reinforcing bar unit, the bending fulcrum is fixed by the bending fulcrum support and the bending force point is driven. It is characterized by having steps.

[Effect]

In the present invention, for example, as shown in FIG. 6, the lifting beam 55 is lowered, the bending fulcrum 30 is centered on the reinforcing bar 19, the bending fulcrum 30 is fixed by the bending fulcrum support 32, and then the bending force point is By extending the hydraulic cylinder 34 of 31, it can be bent by a predetermined angle. These parts are left and right
Since they are arranged in parallel, they can be operated on the left and right to form a 0-shaped unit. When the bending is completed, the bending fulcrum 30, the bending force point 31, and the bending fulcrum support 32 move backward, and the lifting beam 55 rises to take out the reinforcing bar unit.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a conceptual diagram of an automatic reinforcing bar prefabricated unit assembly apparatus to which the bending apparatus of the present invention is applied.

In Fig. 1, l indicates a plurality of jigs fixed at predetermined pitches, and at least two jigs are rotated when supplying vertical reinforcement.
This reinforcement bed is composed of a row of chain conveyors and a roller conveyor that is movable up and down between the chain conveyors and that is raised and rotated when horizontal reinforcement is supplied. At the edge of the reinforcement bed 1, a vertical reinforcement supply device 2 and a horizontal reinforcement supply device 3 are provided at right angles to each other, and are designed to supply vertical reinforcement and horizontal reinforcement onto the reinforcement bed at a predetermined pitch. There is.

Adjacent to the horizontal strip supply device 3, a tying machine 4 is provided that connects the vertical strips and the horizontal strips. Beyond this binding machine 4,
A bending device 5 is provided which integrally bends the mesh-like reinforcing bars sent after being bundled. The bending device 5 is composed of a bending positioning device 7 having a built-in bending bed 6 and an integral bending machine 8 for integrally bending reinforcing bars.

FIG. 2 shows a conceptual diagram of a method for automatically assembling a reinforcing steel prefabricated unit. In the figure, in the first step, vertical stripes are placed on the longitudinal strip supply device 2 and aligned. In the second step, the vertical reinforcements are arranged one by one on the reinforcement bed 1 at predetermined pitches.

In this way, the vertical reinforcements placed in parallel on the reinforcement bed 1 are moved by one pitch of the horizontal reinforcements in the third step. Next, in the fourth step, the horizontal reinforcements are placed and aligned on the horizontal reinforcement supply device 3, in the fifth step, the horizontal reinforcements are placed on the reinforcement bed 1, and in the sixth step, the vertical reinforcements and the horizontal reinforcements are tied together. [Combined by 4. The fifth step and the sixth step are repeated by the number of horizontal stripes to form a mesh unit. Here, if it is necessary to form an L-shaped or U-shaped unit, the mesh unit is subsequently sent to a seventh step and bent by the bending device 5.

Fig. 3 shows a detailed diagram of the vertical reinforcement feeding device.The vertical reinforcement feeding device 2 consists of a pair of left and right feeding devices, and one reinforcing bar is fed from each feeding device toward the center. be done. 9.9' is a chain conveyor for supplying vertical bars, and the vertical bars placed thereon are sequentially sent to the reinforcing bar size adjusting device 10.

The reinforcing bar size adjusting device 1iflo is composed of a fixed piece L1 and a movable piece 12, and adjusts the width of the groove 13 in which the reinforcing bar is accommodated.
The movable pieces 12 are adjusted by being moved by an electric motor 50 and a link 51, and are housed one by one in the groove 13. Thereafter, the actuator 25 rotates the fixed piece 11 upward around the shaft 26, so that the reinforcing bar slides on the transfer surface 15 and slides into the groove 17 of the support bar 16, which similarly swings around the shaft 14. It fits inside.

Note that 18 is a roller provided for zigzag or edge alignment of the ends of the reinforcing bars. When zigzag alignment is performed, the rolling surface 15 is rotated downward, and the reinforcing bars that are sliding are removed by the rollers. 18 and rotate the roller 18 by a predetermined amount in a direction perpendicular to the plane of the paper in the figure, and then rotate the transfer surface 15 upward and store it in the groove 17 of the support bar 16. As a result, the ends of the reinforcing bars are aligned in a staggered manner every time the sliding amount of every other reinforcing bar is changed. In addition, when aligning the edges, it is possible to align the edges by sliding so that the ends of the reinforcing bars after being moved are aligned.

Subsequently, the reinforcing bars 19 in the groove 17 are attracted by the magnet 21 that is moved up and down by the motor 20, and the reinforcing bars 19 are pulled into the reinforcement bed 1.
is placed on top of the At this time, the support bar 16 is rotated by the actuator 22 and is retracted so as not to interfere with the lowering of the magnet 21.

A chain conveyor 23 is rotatably provided in the reinforcement bed 1, and jigs 24 are fixed to the chain conveyor 23 at a predetermined pitch.

Since the chain conveyor 23 moves in synchronization with the lowering operation of the magnet 21, the reinforcing bars supplied from the pair of left and right supply devices are arranged on the chain conveyor 23 two at a time.

The chain conveyor 23 has a number of jigs 24 required for arranging the vertical stripes, which are arranged at the top and bottom of the chain conveyor 23, in a part provided at a certain pitch interval and in a part provided at a different pitch interval. The operator of the rebar prefabricated unit automatic assembly device can select the required pitch interval of the upper and lower jigs 24 of the chain conveyor 23 before starting the reinforcement operation, thereby allowing the operator to 23 rotates, and the first jig 24 of the selected jig 24 row is set under the lifting magnet 21.

In addition, although the figure shows one consisting of a pair of left and right supply devices, it may be configured with only a single supply device. Although not shown, a single horizontal strip feeding device 3 having the same structure as the one on the right side of the pair of vertical strip feeding devices shown in FIG. 3 is used.

Furthermore, as shown in FIG. 4, a two-tier supply device may be provided, upper and lower. In this case, a support bar 47 is separately provided below the support bar 16.

FIG. 5 shows a roller conveyor for moving vertical bars arranged at a predetermined pitch on the reinforcing bed 1 by one pinch of the horizontal strips; 48 is a drive roller; It is rotatably supported between the chain conveyors 23. This roller conveyor is installed on a support 28 that can be moved up and down by a lifting mechanism 27. When placing longitudinal reinforcement on a roller conveyor,
Although it is lowered, when the vertical reinforcement arrangement is completed and the row of vertical reinforcement is moved by one pitch of horizontal reinforcement in order to arrange the horizontal reinforcement, it is raised and moved to the chain conveyor as shown in 29. It can be lifted from 23. If the drive roller 48 is rotated in this state, the row of vertical stripes can be moved.

Next, FIG. 6 shows an integrated bending machine which is located next to the transverse reinforcement arrangement device 3 and is a bending device that bends the reinforcing bars that are sent after being bundled.

A plurality of integrated bending machines are installed in the vertical direction of the bending bed 6, and each device is attached to a lifting beam 55 and a fixed beam 56, and a plurality of bending supports 30 are arranged on the lifting beam 55. At the same time, a plurality of bending force points 31 and bending fulcrum supports 32 are arranged on the fixed beam 56,
Each is operated by hydraulic cylinders 33-35.

That is, the lifting beam 55 is lowered, the bending fulcrum 30 is set on the reinforcing bar 19, and the bending fulcrum 30 is set at the bending fulcrum support 32.
After the 0 is fixed, the hydraulic cylinder 34 at the bending force point 31 is extended to bend by a predetermined angle. When the 0 bending is completed, the bending fulcrum 30, the bending force point 31, and the bending fulcrum support 32 move back, and the lifting beam 55 rises to take out the reinforcing bar unit. These members, namely, the bending fulcrum 30°, the bending force point 31, the bending fulcrum support 32, and the hydraulic cylinders 33 to 35 are provided in pairs at the front and rear in the direction of movement of the reinforcing bar unit, and the bending process is completed at the position shown in Fig. 6. After that, a U-shaped reinforcing bar unit can be formed by moving the reinforcing bar unit forward, stopping at a predetermined position, and bending it again.

FIG. 7 shows a positioning device for a bending device.

The positioning device is used to position the reinforcing bars before bending, and is normally retracted to the left in Figure 1, but when positioning the reinforcing bars, it moves forward to the right. The zero positioning device has upper and lower grippers 36, 37, and moves the reinforcing bar 19 to a predetermined position by sandwiching the reinforcing bar 19 between the grippers 36, 37. The lower gripper 37 is for positioning when bending the reinforcing bar 19, and the upper gripper 3
Reference numeral 6 is for preventing the reinforcing bars 19 from falling when the reinforcing bars 19 are bent, and includes an elevating member 38 for raising and lowering them according to the height of the reinforcing bars 19. The positioning device also includes wheels 39 and can move forward and backward on the rails 40.

Incidentally, when automatically assembling the reinforcing bar prefabricated unit, it is desirable to use a CAD/CAM system as shown in FIG. 8. In this case, the blueprint data 41 includes data necessary for the operation of each device of the automatic assembly machine, and the blueprint data 41 is input into the personal computer 42. Then, the personal computer 42 outputs a unit diagram or processing table 43 based on the above data, and
Input information 44 to the automatic assembly machine is output.

This input information 44 is converted by a converter 45 and sent to a pro-controller (programmable controller) 46. The processor 46 operates the vertical reinforcement supply device 2, the reinforcement bed 1, the horizontal reinforcement supply device 3, the binding machine 4, and the bending device 5 based on the input information 44. The vertical reinforcement supply device 2 has the number of reinforcing bars, the reinforcement pattern, and the staggered amount, and the reinforcement bed 1 has the following information:
The number of reinforcing bars, reinforcement pitch, reinforcement pattern, and vertical reinforcement pitch are determined by the horizontal reinforcement supply device 3, the number of reinforcing bars, reinforcement pattern, and staggered amount by the tying machine 4, and the binding pattern and presence/absence of binding are determined by the binding machine 4. , the bending bag Wt5 is given a bending dimension, a bending pattern, and a bending angle as input information.

It should be noted that the present invention is not limited to the above-mentioned embodiment, and can be modified in various ways. For example, in the above-mentioned embodiment, the bending device 5 is replaced with the vertical reinforcement supply device 2, the reinforcement bed 1, and the horizontal reinforcement supply bag. Although it is combined with W3 and binding machine 4, bending device 5 can be used alone.

Furthermore, if an L-shaped reinforcing bar unit is required, it can be formed by performing the bending process once.

〔Effect of the invention〕

As explained above, according to the present invention, the bending process of reinforcing bar units can be automated, which improves work efficiency, requires fewer personnel, and shortens the time required for assembly.

[Brief explanation of the drawing]

Fig. 1 is a conceptual diagram showing one embodiment of an automatic reinforcing bar prefabricated unit assembly device to which the bending device of the present invention is applied, Fig. 2 is a conceptual diagram of an automatic reinforcing bar prefabricated unit assembly method, and Fig. 3 is a vertical bar feeding device. 4 is a side view showing another embodiment of the vertical reinforcement supply device, FIG. 5 is a side view of the reinforcement bed, and FIG. 6 is a view showing the integrated bending machine of the bending device. ,
FIG. 7 is a side view showing a positioning device of a bending device, and FIG. 8 is a block diagram of an automatic rebar prefabricated unit assembly method using a CAD/CAM system. 1... Reinforcement bed, 2... Vertical reinforcement supply device, 3...
Horizontal reinforcement supply device, 4... Binding machine, 5... Bending device, 6... Bending bed, 7... Bending positioning device, 8
...integral bending machine, 9.9'...chain conveyor,
10...t[size adjustment device, 18...roller, 1
9.19'...Reinforcing bar, 21...Magnet, 22.
...actuator, 23...chain conveyor, 2
4... Jig, 26... Actieator, 27...
Lifting mechanism, 48... drive roller. Applicant Shimizu Corporation (1 other person) Representative Patent Attorney Ryukichi Abe (3 others) Figure 1 Figure 2 ■5Tjfta+r ■Ho! bundle
■ ,)ff+lJFigure 4Figure 5

Claims (3)

[Claims] (1) A lifting beam and a fixed beam provided opposite to the reinforcing bar unit, a bending fulcrum provided on the lifting beam, and a bending force point and a bending fulcrum support provided on the fixed beam; A bending device for a reinforcing bar prefabricated unit, comprising means for fixing the bending fulcrum by the bending fulcrum support and driving the bending force point when the fulcrum comes into contact with the reinforcing bar unit. (2) A reinforcing bar prefabricated according to claim 1, wherein the bending fulcrum, the bending force point, and the bending fulcrum support are provided in pairs in the front-rear direction to form an L-shaped or U-shaped reinforcing bar unit. Unit bending equipment. (3) The bending device for a prefabricated reinforcing bar unit according to claim 1, wherein the reinforcing bar unit is supported by a positioning device.