JPH0314570B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for discharging rear end crops generated when cutting a section steel after hot rolling.

[Prior art and its problems]

BACKGROUND OF THE INVENTION A long round steel, angle steel, or other shaped steel that has been rolled into a predetermined shape by a hot rolling mill is fed into a cutting machine after its bends and the like are straightened by a straightening machine. Then, it is cut into a predetermined size by a cutting machine, and the crops at the front and rear ends are cut off and removed. Straightening and cutting work of such section steel is
In order to improve work efficiency, multiple steel sections are processed simultaneously.

The cutting operation of such a section steel is conventionally carried out as follows. That is, a plurality of sections are transported in parallel on the section steel transfer path, and the cutting machine
A short length crop is cut off at the front end. The cut front end crop falls under its own weight through a chute into a pit provided below on the downstream side of the cutting machine, and is removed from the section steel transfer path. Next, the shaped steel is cut into a predetermined size by a cutting machine, and then transported one after another to the next process. Finally, the rear end crop is cut off.

The rear crop cut in this way is
Although the shaped steel must be removed from the transport path, it is not possible to provide a pit or chute upstream of the cutting machine due to restrictions such as the structure of the cutting machine and the method of supplying the shaped steel. Therefore, the rear end crop is left with its cut end lined up in front of the cutting machine, and does not obstruct the transfer path of the shaped steel sections that are sent one after another from the upstream side to the cutting position after straightening. become. Conventionally, therefore, a worker used a jig or the like to grasp the rear end crop left on the transfer path and put it into a pit that accommodated the front end crop.

However, such manual removal of the rear end crop requires a dedicated worker, is inefficient, and is dangerous.

[Purpose of the invention]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a method for quickly and safely discharging a severed rear end crop without the use of human power.

[Summary of the invention]

This invention provides a transport path for the cut steel sections downstream of a cutting machine for cutting a moving long section steel into predetermined dimensions and cutting crops at the front and rear ends thereof. A mount having one end near the cutting machine as an axis and the other end capable of being raised and lowered, and a crop extracting cart having an electromagnet at the tip and capable of running along the mount, and cutting by the cutting machine. The rear end crop remaining on the transfer passage is pulled out by the crop extracting cart and discharged into a pit provided below the pedestal.

[Structure of the invention]

Next, the present invention will be explained with reference to the drawings.
FIG. 1 is a schematic side view showing one embodiment of the present invention, and FIG. 2 is a schematic plan view of the pedestal 3. As shown in FIG. As shown in FIGS. 1 and 2, on the downstream side of the cutting machine 1 (on the left side of the cutting machine 1 in FIG. 1), along both sides of the transfer passage for the section steel cut to a predetermined size, two frames 3a and 3b, each of which has one end close to the cutting machine 1 and is pivoted by shafts 2 and 2;
Connecting the other ends of the two frames 3a and 3b, respectively,
A U-shaped pedestal 3 consisting of a frame 3c orthogonal to the section steel transfer path is provided.

An extraction cart 4 is mounted on the frame 3 and is movable along the frames 3a and 3b in parallel to the section steel transfer path. The trolley 4 includes a motor 5, a crossbeam 6 having approximately the same length as the frame 3c, and a magnet plate 7 made of an electromagnet attached to the side of the crossbeam 6 facing the cutting machine 1 along its length. It is made up of.
The rotation shaft of the motor 5 meshes with racks attached to the frames 3a, 3b. Therefore, the rotation of the motor 5 allows the cart 4 to travel on the pedestal 3.

The other end of the pedestal 3 is supported by a link mechanism 9 connected to a piston 8 so as to be movable up and down. The link mechanism 9 includes an L-shaped first link piece 11 whose one end is horizontally connected to the piston 8 and whose bent part is pivoted by a horizontal shaft 10;
A substantially vertical second link piece 13 is pivoted to the other end of the first link piece 11 with a shaft 12, one end of which is fixed to the frame 3a, and the other end is pivoted to the second link piece 13 with a shaft 14. It consists of a substantially vertical support piece 15. When the rear end crop is ejected, the frame 3 is moved to the first position by the link mechanism 9 mentioned above.
As shown in the figure, it is supported almost horizontally, and when transferring the section steel, a piston 8 is operated in the direction shown by the arrow, so that a piston 8 is installed above the section steel transfer passage so as not to interfere with the transfer of the section steel. It can be raised as shown by the dotted line in Figure 1. The reason why the frame 3 is configured to be able to move up and down in this way is as follows. That is, in the cutting machine 1 installed in the rolling line, the upper blade 17 and the lower blade 16
A first stopper 18 is provided downstream of.
The first stopper 18 is raised to the position shown by the solid line in Fig. 1 when it is not used as a stopper (indicated by the dotted line in Fig. 1), but its height is sufficient for the section steel to pass through. The stopper 18 is located at a relatively low height, and due to the structure of the cutting machine 1, the stopper 18 cannot be raised above this position. Therefore, if the frame 3 for transferring the shaped steel is located above the shaped steel transfer path as shown by the dotted line in FIG. 1, the cart 4 cannot be moved upstream. This is because when the truck 4 is moved, the truck 4 comes into contact with the raised stopper 18.
Therefore, when moving the cart 4 to the upstream side of the pedestal 3 as described later in order to discharge the rear end crop of the section steel left on the downstream side of the cutting machine 1, the pedestal 3 is moved as shown in the solid line in FIG. It is necessary to position it horizontally as shown in . Therefore, while the shaped steel 7 is being transferred through the transfer path, the frame 3 is positioned above the shaped steel transfer path as shown by the dotted line in FIG. When discharging the rear end crop, the pedestal 3 is positioned horizontally as shown by the solid line in FIG.

The cutting machine 1 has a fixed lower blade 1 having a cutting edge of sufficient size to simultaneously cut a plurality of long steel sections.
6, and an upper blade 17 that is provided above the lower blade 16 and moves up and down. On the exit side of the cutting machine 1, a first stopper is provided on the exit side of the cutting machine 1 to align and abut the front end crops of the plurality of long shaped steels fed into the cutting machine 1 in order to cut the front end crops of the long shaped steels into a predetermined size. 18 is provided so as to be movable up and down by an air cylinder 19. On the entry side of the cutting machine 1, a presser roller 20 is provided which can be raised and lowered by an air cylinder 21 to press down the shaped steel from above when cutting the shaped steel.

On the downstream side of the pedestal 3, a cutting machine 1 is used to cut a plurality of long steel sections into predetermined dimensions.
A second stopper 22 that aligns and abuts the tips of the shaped steel
is provided so as to be able to appear and retract from below the shaped steel transfer passage. 23 is a roller for transferring the shaped steel, 24 is a roller for transferring the rear end crop provided close to the lower blade 16 of the cutting machine 1, and 25 is a mount 3.
26 is a cutting machine 1 provided downstream of
28 is a chute for feeding the front end and rear end crops into the pit 26.

A plurality of sections 27 such as long round steel and angle steel are rolled into a predetermined shape by a hot rolling mill, and after their bends are straightened by a straightening machine, they are simultaneously fed into the cutting machine 1. It will be done. At this time, the first stopper 18 is
It is lowered by an air cylinder 19 and positioned on the section steel transfer passage. By the shaped steel transfer rollers 23,
The plurality of shaped steels 27 that have been transferred and entered in parallel through the shaped steel transfer passage are stopped at a cutting position with their tips abutting the first stopper 18, and then moved to the air cylinder 21.
It is pressed down by the presser roller 20 that has descended. Next, the upper blade 17 descends, and the upper blade 17 and the lower blade 1
6 cuts the front end crop. The cut front end crop falls under its own weight through a chute 28 into a pit 26 provided below the cutting machine 1.

The shaped steel 27 whose front end crop has been cut is advanced in the downstream direction by the shaped steel transfer rollers 23 and the shaped steel transfer belt conveyor 25. At this time, the second stopper 22 protrudes into the shaped steel transfer passage, and the advancing shaped steel 27 is transferred to the second stopper 22.
It comes into contact with and stops at the cutting position. Next, the upper blade 17 descends, and the shaped steel 27 is cut into a predetermined size by the upper blade 17 and the lower blade 16.

In this way, after the shape steel 27 is transferred and cut repeatedly, the rear end crop is finally transferred to the lower blade 1.
6 is left in a position close to the lower blade 16 on the upstream side. Next, during the transfer and cutting of the section steel 27, the piston 8 and the link mechanism 9 are driven to move the frame 3, which was located above the section steel transfer passage, to a position horizontal to the section steel transfer passage (indicated by the solid line). lower it to the position shown).

Next, the rear end crop transfer roller 24 is rotated to transport the rear end crop to a position where the magnet plate 7 of the cart 4 can reach. Then, move the trolley 4 to the lower blade 1.
6, and the remaining rear end crop is attracted by the magnetic plate 7. In this way,
The cart 4 with the rear end crop adsorbed is moved in the direction of the second stopper 22, the magnetic force of the magnet plate 7 is demagnetized above the chute 28, and the rear end crop is inserted into the pit 26 through the chute 28. accommodate. It is preferable that the demagnetization and excitation of the magnet plate 7 be performed automatically to save manpower.

Once the rear end crop has been discharged from the section steel transfer passage, the pedestal 3 is again raised by the link mechanism 9 to a position above the section steel transfer passage as shown by the dotted line.

〔Effect of the invention〕

As described above, according to the method of this invention,
Since the remaining crop at the rear end is discharged without the use of human power, excellent industrial effects such as cutting of the section steel can be carried out quickly and safely.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing one embodiment of the present invention, and FIG. 2 is a schematic plan view of the pedestal. In the drawings, 1... cutting machine, 2... shaft, 3... mount, 4...
Trolley, 5... Motor, 6... Cross beam, 7... Magnetic plate, 8... Piston, 9... Link mechanism, 10...
...Shaft, 11...First link piece, 12...Shaft, 13
...Second link piece, 14...Shaft, 15...Support piece, 16...Lower blade, 17...Upper blade, 18...First
Stopper, 19...Air cylinder, 20...Press roller, 21...Air cylinder, 22...Second stopper, 23...Roller for transferring section steel, 24...Roller for transferring rear end crop, 25... Belt conveyor for transferring shaped steel, 26... pit, 27... shaped steel, 28... chute.

Claims (1)

[Claims] 1. On the downstream side of the cutting machine for cutting the moving long shaped steel into predetermined dimensions and cutting the crops at the front and rear ends, a cutting machine is installed along the transport path for the cut shaped steel. , a pedestal whose one end near the cutting machine is an axis and whose other end is movable up and down, and a crop extracting cart having an electromagnet at the tip and which can run along the pedestal; A method for discharging a rear end crop of a section steel, characterized in that the rear end crop remaining on the transfer passage is pulled out by the crop extraction cart and discharged into a pit provided below the pedestal. .