JPH0241371B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic reinforcing bar bending apparatus for processing hoops, stirrups, etc.

Conventionally, when processing hoops, stirrups, etc., the following reinforcing bar bending equipment has been used.

The first one is manual processing equipment. This is equipped with a bending section consisting of a fulcrum and a force point arm on a horizontal table, and the worker sets the reinforcing bars one by one on the table and presses a pedal to first bend the reinforcing bars at the first bending point. After bending, the reinforcing bars are sequentially reset and bent at each bending point to produce a hoop or the like. In other words, with this device, it is necessary to check the dimensions each time the bending process is performed, and to remove and reinstall the reinforcing bars each time one bend is made. Therefore, although the device is small, it has drawbacks such as cumbersome work, low work efficiency, and low precision.

On the other hand, the other device arranges multiple bent parts in a straight line on a vertically long base, corresponding to the bending parts of the reinforcing bars, and then bridges the reinforcing bars over these bent parts. By operating each bending part in a predetermined order, each bending part is bent and a hoop or stirrup of a predetermined size is automatically produced. Although this device can automatically bend multiple reinforcing bars with high efficiency and precision, it is heavy and heavy because it has a structure in which multiple bending sections, which are the main part of the device, are arranged at each bending point. , and the problem is that the price is high. In other words, each bending section has a combination of fulcrums and force points, and is equipped with a drive mechanism such as a hydraulic type, so the structure is complex and heavy. Therefore, a device having the same number of bending parts as there are bending parts (5 parts for hoops and stirrups) is naturally large, heavy, and expensive. For this reason, it is not only unsuitable for small and medium-sized sites to bring this device in for use, but also has the disadvantage of leaving the device idle.

This invention was made in view of the above circumstances,
To provide an automatic reinforcing bar bending device that can bend reinforcing bars with high precision and efficiency, is small and lightweight, has low manufacturing costs, and is the most practical for small and medium-sized sites.

In this invention, a reinforcing bar is provided so that the reinforcing bars are automatically sent forward in the longitudinal direction by a drive mechanism, and a reinforcing bar bending table is provided in front of this sending out platform, and the reinforcing bars sent from the reinforcing bar are sequentially bent. It is characterized in that it is structured so that it can be bent automatically at all bending points using a single bending table.

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

As shown in its entirety in FIGS. 1 and 2, the apparatus of the present invention consists of a reinforcing bar feeding table A and a reinforcing bar bending table B, and is installed on a pedestal 1.

First, we will discuss reinforcing bar delivery table A. A base 2 is fixed on the pedestal 1. On the top surface of this base 2 is a transfer table 3 for transferring reinforcing bars P.
is provided. A plurality of rollers 4 are attached to the transfer table 3 in its longitudinal direction, and when the reinforcing bar P is placed on the transfer table 3, the reinforcing bar P
It is designed so that it can be transferred smoothly in its longitudinal direction. Note that the base 2 and the transfer table 3 are of a split type, and the length thereof can be adjusted according to the length of the reinforcing bar P to be processed, making it convenient for relocation.

A reinforcing bar push cart 5 is provided so as to straddle the transfer table 3, as shown in FIG. The reinforcing bar pushing cart 5 has wheels 6 on one side facing downward, and is provided so as to be able to move freely on the base 2 along the transfer table 3. As a drive mechanism for moving this reinforcing bar push cart 5,
Hydraulic motor 7, chain 8, sprocket 9, 1
0 and 11 are provided. In addition, in order to detect the movement position of the reinforcing bar push cart 5 and control the movement amount,
A plurality of limit switches 12a to 12e (5 pieces) are provided on the base 2 along the transfer table 3 at predetermined intervals, and a protrusion 13 for operating the limit switches is provided on the lower surface of the reinforcing bar pushing cart 5. ing. Note that the limit switches 12a-1
2e are each slidably attached so that their positions can be adjusted, and the amount of movement of the reinforcing bar push cart 5 can be freely controlled.

Further, a reinforcing bar clamping mechanism 14 is provided in a portion of the reinforcing bar pushing cart 5 facing the transfer table 3. As shown in FIG. 6, this is a toggle mechanism in which the rear end of a plurality of horizontally arranged reinforcing bars P is sandwiched between a bottom plate 15 and an upper plate 16 rotatably attached to the bottom plate 15. It is strongly gripped with the lever 17.

A reinforcing bar bending table B is installed in front of the reinforcing bar feeding table A, which is configured to send out the reinforcing bars P placed on the transfer table 3 forward in the longitudinal direction. This bending table B is constructed as shown in FIG. That is,
In such a way as to sandwich the transfer trajectory of the reinforcing bars P sent out from the transfer table 3 of the reinforcing bar delivery stand A,
A fulcrum shaft 18 is arranged on the upper side, and two front and rear bending rollers 19, 20 (force point arms) are arranged on the lower side.
9 and 20 are both oriented horizontally in a direction orthogonal to the reinforcing bars P and supported by a vertical frame plate 21.

The fulcrum shaft 18 is supported so as to be freely inserted into a hole 22 of the frame plate 21, and is configured to be able to protrude and retract from the front side of the frame plate 21 by means of a cylinder 23 provided on the back side of the frame plate 21. In addition, the two rollers 19 and 20 arranged on the lower side are connected to the frame plate 21, respectively.
It is supported to be movable up and down along guide grooves 24 and 25 formed in the frame plate 21, and is moved by cylinders 26 and 27 provided on the back side of the frame plate 21, respectively, so that the reinforcing bar P is supported with the shaft 18 as a fulcrum. It is configured to be bent by bending. In this case, the guide grooves 24 and 25 are curved at the upper part so as to go around the fulcrum shaft 18 side,
It is possible to bend reinforcing bars from 0° to 135°. The reinforcing bar bending table B has cylinders 26 and 2 to adjust the bending angle of the reinforcing bars.
A control limit switch (not shown) is provided so that 7 is stopped at a predetermined position during processing.

Further, 28 is a reinforcing bar guide plate. This is to prevent the already-processed part from hitting the bending part and hindering the process when bending the bent parts one after another. ing. However, in consideration of the need to remove the reinforcing bars after processing, they are supported by a hinge 29 as shown in FIG. 5 so as to be able to rotate rearward in the plane of the paper in FIG. The lever 30 allows it to be pushed forward or retracted backwards.

In FIGS. 1 and 2, 31 is a stock stand for reinforcing bars P, 32 is a table cover, and 33 is a safety frame.

When bending reinforcing bars with the apparatus configured as described above, first, a plurality of reinforcing bars P are unloaded from the stock table 31, placed on the transfer table 3, and the rear ends of the reinforcing bars P are placed on the reinforcing bar pushing cart 5. The reinforcing bar clamping mechanism 14 is used to grip the reinforcing bar. Next, the hydraulic motor 7 is driven to send the reinforcing bar P forward. When the first bending point is located on the fulcrum shaft 18 of the reinforcing bar bending table B, the feeding operation is stopped and the bending table B is operated. That is, the bending roller 19 is moved upward by the cylinder 26, and the bending portion of the reinforcing bar is bent. In this case, by controlling the amount of movement of the bending roller 19,
The bending angle is adjusted.

When the first bending point is finished, the bending roller 19 is returned downward, and the reinforcing bar P is sent forward again to process the next bending point. In this case, the feed amount is controlled by the limit switch 12.
This is done based on the signals a to 12e.

Next, a case in which a hoop is actually processed will be specifically explained.

First, in processing the houb, the steps (a) to (f) shown in FIG. 7 are performed in the order. That is, first, the point where the tip of the reinforcing bar P is located at the lower end of the fulcrum shaft 18 is set as an initial point, and from there (a), the reinforcing bar is fed out by a distance A and stopped, and the bending process at the bending point a is performed.

(b) Next, feed it by the dimension B and perform the bending process at the bending point b.

(c) Next, send out a dimension C and perform bending at the bending point c.

(d) Then, send it out further by the dimension D and bend the point d.
Perform the bending process.

(e) Next, feed out only the dimension E.

(F) Finally, bend the bending point e in the opposite direction to complete the hoop.

Therefore, based on the above steps, the following settings are made prior to actual processing. First, limit switches 12a to 1 are selected depending on the dimensions of the target hoop.
2e, and set each interval to A to F as shown in FIG. In addition, each bending point a~e
The limit switches (not shown) and the operating systems of the cylinders 26 and 27 are set so that the movement amount of the bending rollers 19 and 20 is controlled according to the bending angle of the bending rollers 19 and 20. In this case, of course, the operation of the hydraulic motor 7 is controlled in accordance with the signals from the limit switches 12a to 12e, and in conjunction with this control, the movement amount of the bending rollers 19 and 20 and the protrusion and retraction movement of the fulcrum shaft 18 are controlled. Create a sequence.

Then, as shown in FIG. 9, the reinforcing bars are actually bent.

(a) First, a plurality of reinforcing bars P are placed on the transfer table 3, set on the reinforcing bar pushing cart 5, and the tips of the reinforcing bars P are positioned at the lower end of the fulcrum shaft 18.

(b) Then start the device. Then, the reinforcing bar push cart 5 switches the limit switch 12 at each bending point.
It is stopped by signals a to 12e. First, the first
It stops with the bending point a located at the fulcrum shaft 18.

(c) In the stopped state, the front bending roller 19 moves upward, and the bending process at point a is performed.

(iv) When the bending process is completed, the bending rollers 19 and 20 return to the lower position, and the reinforcing bar P is fed out again.

(e) to (li) Then, the reinforcing bar P is fed out to a predetermined size and bent to reach the state shown in (li). then,
The tip of the already machined reinforcing bar P is deflected laterally (towards the front of the paper in the drawing) by the reinforcing bar guide plate 28, so that it does not interfere with the part to be machined.

(NU) Then, after performing the final sending out,
The reinforcing bar clamping mechanism 14 of the reinforcing bar pushing cart 5 is operated to release the clamp on the rear end of the reinforcing bar P.

(L) Then, this final bending point e is processed by the bending roller 20 on the other side (rear side).

Then, when all the bending work is completed and the hoop is completed, the fulcrum shaft 18 is moved to the frame plate 21.
(See Figure 4) and the completed hoop can be easily lifted upwards.

Through the above procedure, one set of reinforcing bars is automatically processed into a hoop. Therefore, processing can be performed with high efficiency and high precision, and only one worker is required.

As described above in detail, the automatic reinforcing bar bending device of the present invention is composed of a reinforcing bar feeding table and a reinforcing bar bending table, and this reinforcing bar feeding table is equipped with a reinforcing bar gripping mechanism. By synchronizing the feeding of the reinforcing bars with the movement of the rollers that bend the reinforcing bars, the reinforcing bars can be sequentially bent while being automatically fed out, making it possible to process hoops and the like with high efficiency and precision. Moreover, in this case, only one reinforcing bar bending table is required, so the apparatus can be made small, lightweight, and inexpensive. Therefore, it is most practical for use in small and medium-sized sites. In addition, since a roller for bending the reinforcing bars is also provided on the rear side of the fulcrum shaft, the rearmost end of the reinforcing bars can also be bent. In addition, the guide member deflects the tips of the processed reinforcing bars laterally so that they do not get in the way of the bending of the unprocessed reinforcing bars, and when taking out the bent hoops, etc.
By retracting the fulcrum shaft, there is an advantage that the fulcrum shaft does not become jammed.

[Brief explanation of drawings]

FIG. 1 is an overall plan view showing one embodiment of the present invention, FIG. 2 is a front view of the same, and FIG.
A sectional view along the line, FIG. 4 shows details of the main parts of the reinforcing bar bending table, A is a front view, B is a side sectional view thereof, FIG. 5 shows details of the mounting structure of the reinforcing bar guide plate 28, A is a front view, B is a side view, FIG. 6 is a detailed view of the reinforcing bar clamping mechanism 14, FIG. 7 is a process diagram of adding a hoop using the device of this invention, and FIG. 8 is a limit switch according to the process. 12a~
FIG. 9, which is a diagram of the apparatus in which 12e is set, is a diagram for explaining the actual work process step by step. A... Rebar feeding table, B... Rebar bending table, P
...Reinforcement bar, 3...Transfer table, 5...Reinforcement bar push cart,
7... Hydraulic motor, 8... Chain, 9, 10, 11
...Sprocket, 14...Rebar clamp mechanism, 18
...Fullin shaft, 19, 20...Bending roller, 2
1... Frame plate, 22... Hole, 23... Cylinder, 24, 2
5... Guide groove, 26, 27... Cylinder.

Claims (1)

[Claims] 1 Reinforcing bar delivery stand A and this reinforcing bar delivery stand A
The reinforcing bar bending table B is installed at a fixed position in front of the reinforcing bar, and the reinforcing bar feeding table A is used to intermittently feed a plurality of reinforcing bars P by a predetermined length in the longitudinal direction of the reinforcing bar P transfer track. A reinforcing bar pushing cart 5 is provided, and a clamping mechanism 14 is provided at the front of the reinforcing bar pushing cart 5 to clamp the rear ends of a plurality of reinforcing bars P.
A fulcrum shaft 18 that is located on one side of the transfer track for reinforcing bars P from and supported in the axial direction so as to be retractable in the axial direction and perpendicular to the longitudinal direction of the transfer track; The fulcrum shaft 1 is supported parallel to each other and spaced apart, and has both ends extending from one side to the other side of the transfer track.
A pair of rollers 1 that bend reinforcing bars P by being guided in grooves 24 and 25 formed so as to surround 8.
9 and 20, which are located on one side of the transfer track and are spaced apart from the transfer track and the fulcrum shaft 18, whose surface direction is along the extension direction of the processed reinforcing bars and along the longitudinal direction of the transfer track. An automatic reinforcing bar bending device comprising a guide plate 28 arranged to intersect with the longitudinal direction of the reinforcing bar P and guide the tip of the processed reinforcing bar P so as to intersect with the longitudinal direction of the transfer track. .