JPS6351805B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a short material processing method and apparatus for processing short material produced during the final cut of fixed length cutting by cold shear, which simultaneously processes a large number of parallel long steel bars. It is.

Conventionally, the long steel bars are conveyed in parallel on a conveyance line using grooved rollers, and cut to a fixed length by a rolled shear having a grooved blade having grooves formed in the same number and at the same intervals as the grooves of the rollers. Usually, during the final cut of the fixed-length cutting process, short pieces are produced from the parallel steel bars.

For this reason, lifters of the same number as the grooves are installed between the rollers before the cold shear to match the positions of the grooves mentioned above, and at the time of final cutting, only the short material is lifted from the conveying surface, and the short material is conveyed to the cold shear side. It is designed so that it can be stopped. Then, after first cutting other steel bars that can be cut to a fixed length, the short material on the lifter is lowered onto the conveying surface, transported to the cold shear, and the cutting length suitable for the short material is set. Cutting process is in progress.

However, this method requires cutting to length and short length for each group that is to be cut at the same time, and if even one short piece of material is produced, cutting to length for each group must be interrupted for processing. Te, 1
This method has the disadvantage that several cutting operations must be performed, resulting in a significant decrease in productivity.

The present invention has been made in view of the above-mentioned conventional drawbacks, and involves storing only short length materials off-line before the final cut of fixed length cutting by cold shear.
While cutting to a fixed length continues, when the stored short materials reach a predetermined number, the upper short materials are paralleled on the conveyance line again and the short materials are processed. It is an object of the present invention to provide a method and apparatus for processing short material, which can improve the productivity of cold shear by reducing interruptions for processing.

Next, the present invention will be explained with reference to the drawings which are one embodiment.

1 to 3 show an apparatus for implementing the short material processing method according to the first invention, and show an application example of the short material processing apparatus according to the second invention.

In the figure, reference numeral 1 denotes a short material processing device, which is installed along with a cold shear (not shown) so as to cross a conveying device 2 that forms a steel bar cutting line. It consists of Transferred Tsug 5.

The conveyance device 2 is formed by arranging grooved rollers 7 having a large number of annular grooves 6 on the outer periphery in parallel so as to be able to drive an appropriate number of rotations. Then, the same number of long steel bars 8 are received onto the annular groove 6 from the cooling bed (not shown), and these are conveyed in parallel from right to left in the figure to form the same number of cutting grooves coaxial with the annular groove 6. The material is brought to a cold shear (not shown), and the material is cut to a fixed length by the cold shear while repeatedly conveying and stopping using a stopper as appropriate.

The lifter 3 is provided in the conveying device 2 in correspondence with the positions of the respective annular grooves 6 and can be operated independently of each other, and has a large number of rotatably supported levers 9. A V-shaped first groove 10 for placing the steel bar is formed in the upper part of each lever 9, and the lower end thereof is connected to a connecting rod that moves back and forth by the drive of an air cylinder 11 installed on the floor. It is pin-coupled to 12. Then, as the connecting rod 12 moves back and forth, the levers 9 in the same lifter 3 rotate simultaneously in parallel to each other, and the first groove 10
are moved up and down across the conveying surface L of the conveying device 2 while keeping the parts at the same height.

Further, the length of the steel bar before the final cut of the fixed-length cutting stage is determined by appropriate means, the short material 8a is detected, and the air cylinder 11 at the position corresponding to the short material 8a is operated.

Therefore, with this lifter 3, the short material 8
It is possible to stop the conveyance by lifting only a from the conveyance surface L.

In addition, in order to avoid confusion of various parts of the device in the drawings, in FIG. 1, the first groove 10 part,
In FIG. 3, only the first groove 10 and the connecting rod 12 are shown, and the rest are omitted.

The transfer dog 5 has an appropriate number (three rows in this example) of V-shaped second grooves 13 on the upper surface for placing the steel bars.
It is provided so as to be movable into and out of the conveying device 2 along a first rail 14 made of a pair of opposed shaped steel installed across the conveying device 2 between the grooved rollers 7. That is, a drive sprocket 15 is attached to one end of the first rail 14 and a free sprocket 16 is attached to the other end, and a chain 17 is stretched between the two sprockets 15 and 16, and both ends of the chain 17 are attached to the front and back of the transfer dog 5. It is fixed. The transfer dog 5 is advanced or retracted via the chain 17 by appropriately rotating the drive sprocket 15 in the normal or reverse direction.

A plurality of transfer dogs 5 (nine in this example) are provided at appropriate intervals according to the length of the short material to be processed, and each transfer dog 6 is synchronized to process the entire material at once. They are designed to operate in the same way.

Further, the second groove 13 is located above the conveyance surface L and below the first groove 10 of the lever 9 when the lever 9 is raised.

Therefore, when the short material 8a is lifted from the conveying surface L by the first groove 10, the transfer dog 5 can move under the short material 8a without interfering with it, and also lowers the first groove 10. As a result, when the lifted short material 8a is lowered onto the second groove 13, the short material 8a can be transported across the conveying device 2 without interfering with the grooved rollers 7.

The running track 4 has a running frame 19 below the first rail 14 that moves forward and backward into and out of the conveying device 2 along a second rail 18 made of opposing shaped steel provided across the conveying device 2. ing.
This running frame 19 is driven by drive sprockets 20 and free sprockets 2 attached to both ends of the second rail 18, similar to the transfer gear 5 described above.
This is done by extending a chain 22 over the running frame 1 and fixing both ends of the chain 22 to the front and back of the traveling frame 19.

Further, each running frame 19 has a plurality of (three in this embodiment) vertical columns 23 erected, and each vertical column 23 has a top surface for placing the same number of steel bars as the annular grooves 6. An L-shaped elevating arm 25 with a V-shaped third groove 24 is connected to the drive shaft 26, pinion 27, and rack 28.
It is provided so that it can be raised and lowered via the

In this embodiment, one traveling truck 4 is provided for each of the three transfer dogs 5, overlapping each other without interfering with each other, and there are three in total; , the whole works synchronously and equally. Then, as described below, lifting and lowering between a position lower than the conveying surface L and a position higher than the second groove 13 of the transfer dog 5 and movement of the traveling frame 19 in and out of the conveying device 2 are performed as appropriate. By aligning them, the short material 8a on the third groove 24 is transferred onto the grooved roller 7.

Next, as an embodiment of the short material processing method according to the first invention, a method of operating the apparatus having the above configuration will be described.

First, a large number of long steel bars 8 arranged in parallel on the conveying device 2 are simultaneously transported in fixed pitches and cut to a fixed length using a cold shear (not shown), and the length of the steel bars before the final cut is determined by an appropriate means. , consider a state in which only the short material 8a is conveyed and then the other steel bars are conveyed, cut to a fixed length, and discharged.

That is, the short material 8a is lifted from the grooved roller 7 by the lifter 3 and is in a stopped conveyance state, and by moving the transfer dog 5 to below the short material 8a and lowering the lifter 3, the first material is The short material 8a is transferred onto the transfer dog 5 (FIG. 4a). The same goes for the case where there are a plurality of short materials 8a, and the transfer operation is performed for the second and third short materials 8a by repeating the movement of the transfer dog 5 and the lowering of the lifter 3 (Fig. 4). b, c). When the transfer onto the transfer dog 5 is completed, move the transfer dog 5 to the right (Fig. 4 d) and lift the lifting arm 2.
5 is lowered than the upper surface of the transfer dog 5 and reaches the traveling rack 4 waiting on the machine side of the conveying device 2 (FIG. 4e).

When the transfer dog 5 stops, the elevating arm 25 is raised to transfer the short material 8a from the transfer dog 5 onto the elevating arm 25 (FIG. 4f).

Thereafter, the conveyance device 2 waits in this state (FIG. 4f) until the short material 8a is generated.
When this happens, the transfer dog 5 is again moved to the left toward the conveying device 2 (Fig. 4g) and positioned below the short material 8a (Fig. 4h), and then the transfer dog 5 is moved to the left toward the conveying device 2 (Fig. 4g) and positioned below the short material 8a (Fig. 4h). Repeat the operations up to Figure 4h (Figure 4i).

Next, when the number of short materials 8a on the lifting arm 25 becomes equal to the number of grooves on the grooved roller 7 (FIG. 4j), the transfer dog 5 is retracted to the left of the conveying device 2, and the lifting arm 25 is moved. With the top surface kept higher than the transport surface L, move the traveling rack 4.
The robot is moved to the left toward the transport device 2 (Fig. 4k).

Then, after stopping the traveling rack 4 at the point where the axis of each short material 8a is over the center of each groove of the grooved roller 7 (FIG. 4l), the lifting arm 25 is lowered,
The short materials 8a are transferred onto the conveying device 2 in a parallel state (Fig. 4m). After the transfer, the transfer dog 5 is left as is, and only the traveling rack 4 is returned to its original position (the state shown in FIG. 4e) and placed on standby.

On the other hand, the short material 8a transferred onto the conveyance device 2 is cut by cold shearing with an appropriate cutting length set.

Thereafter, by repeating the above-mentioned operations shown in FIGS. 4a to 4m, it is possible to process short pieces generated for a new group of long steel bars.

As is clear from the above description, according to the first invention, only the short pieces are stored off-line before the final cut of a large number of long steel bars arranged in parallel are cut to a fixed length by cold shear, and the cut to a fixed length is performed. On the other hand, when the stored short materials reach a predetermined number, the short materials are arranged in parallel on the conveyance line again to process the short materials.

Therefore, there is no need to interrupt the regular length cutting operation each time a short piece of material is generated.
As a result of processing a predetermined number of short materials at once, the productivity of cold shearing can be improved.

According to the second invention, in order to carry out the first invention, there is provided a transport stop device that stops transporting only the short material, a transfer dog that places the short material on its upper surface and advances and retreats into and out of the transport device; It is comprised of a traveling rack that receives short materials from the transfer dog, stores a predetermined number of short materials, and moves into and out of the conveying device to transfer the short materials to the conveying device.

Therefore, cutting to a fixed length can be continued without interruption at least until the number of short materials on the traveling rack reaches a predetermined number, and short materials can also be processed in batches in a number comparable to the cold shear capacity, which improves the productivity mentioned above. Improvements can be achieved efficiently.

Furthermore, even if some of the blade grooves of the cold shear are damaged during cutting, the untreated steel bar can be transferred to a position with healthy blade grooves using the above-mentioned transport stop device and transfer dog, and the cutting process can be carried out. This has the effect of making it possible to

[Brief explanation of the drawing]

1 and 2 are a plan view, a side view, and a side view of a steel bar cutting line to which the short material processing device according to the second invention is applied;
Figure 3 is an enlarged sectional view taken along the - line in Figure 2, Figure 4a
-m are explanatory diagrams showing the operation sequence of the short material processing method according to the first invention. 1...Short material processing device, 2...Transport device, 3...
... Lifter, 4 ... Traveling rack, 5 ... Transfer dog, 8 ... Long steel bar, 8a ... Short length material, 10 ... First groove, 25 ... Lifting arm.

Claims (1)

[Claims] 1. A large number of long steel bars arranged in parallel are conveyed all at once and cut to a fixed length by cold shear, while the length of the steel bars before the final cut is determined and only short lengths are stopped from being conveyed. In a steel bar cutting line that conveys and cuts other steel bars to a fixed length, short materials are taken offline by a transfer dog that has a short material placement section on the top surface and moves in and out of the line, and then waits on the side of the line. After transferring and storing the short materials on the rack and repeating the above series of operations until the number of short materials on the traveling rack reaches a predetermined number, the short materials on the traveling rack are arranged on the line again by appropriate means. A short material processing method characterized in that the material is cut into appropriate lengths by cold shearing. 2. On a conveying device that conveys a large number of parallel long steel bars all at once and cuts them to a fixed length using cold shear, the length of the steel bars is determined before final cutting to a fixed length, and only the short bars are stopped from being transported. A stop device, a transfer dog which has a steel bar placement part on its upper surface that receives the stopped short material, and which advances and retreats into and out of the above-mentioned conveying device, receives the short material from the transfer dog, and places a predetermined number of short materials in a parallel state. What is claimed is: 1. A short material processing device comprising: an elevating arm for storing short materials; and a traveling truck that moves in and out of a conveyance device to transfer short materials to and from the conveyance device.