JPH0428648Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a device for correcting sag on the inner diameter of a strip coil, and in particular, by effectively eliminating the sagging that occurs on the inner diameter of the coil before unwinding the strip coil. , which attempts to smoothly perform the rewinding process.

(Prior art) In various strip processing lines, the strip coil is unwound by a payoff reel on the input side.
The strip is supplied to the processing section. The strip coil is supplied to the unwinding shaft of the payoff reel.
This is usually done using a coil car, but in this case, if the strip end on the inside diameter of the coil is drooping (such a strip end drooping), the strip end will be attached to the unwinding shaft while being inserted into the payoff reel. , and the rewinding operation becomes impossible. Therefore, in such a case, the coil should be removed from the unwinding shaft, the sagging part should be cut off by the operator using a cutter, etc., and then the coil should be removed.
Must be reinserted.

However, since this takes a long time to restore, the operator visually checks the inner diameter of the coil before inserting the strip coil into the winding shaft, and if there is any sag, it is removed by cutting it off with a cutter or the like.

Note that when the strip is a steel strip, sag does not occur when the plate thickness is large because of its high rigidity, but sag easily occurs when the plate thickness is about 1 mm or less.

(Problem to be Solved by the Invention) However, the above-mentioned method of visual inspection by an operator not only increases the operator's workload, but also leads to a decrease in yield.
Furthermore, there was a problem in that automation at the entry side of the line was hindered.

This invention was developed in view of the above-mentioned circumstances, and the purpose of this invention is to propose a device that can easily and simply correct the sagging of the inner diameter portion of the coil without cutting the strip end.

(Means for Solving the Problems) That is, this invention consists of a cradle roll on which a strip coil is placed horizontally and rotates about its axis, and a cradle roll which is installed so as to be freely inserted into the inner diameter space of the strip coil, and which rotates the strip coil from the axis of the coil. a sag detection device having a distance meter that measures the distance to the inner circumferential surface;
This device for correcting sag on the inner diameter of a strip coil is characterized by comprising a controller that controls rotation of the cradle roll in order to guide the sag downward based on detection data from the sag detection device.

(Function) Since the device according to this invention has the above-mentioned configuration, even if a sag occurs on the inner diameter part of the strip coil, the coil can be easily rotated so that the sagging part is located at the bottom of the coil. If you rotate the coil in this way, the sagging part will be automatically corrected by its own weight.

(Example) This invention will be specifically explained below based on the drawings. FIG. 1 shows a typical conveying equipment for strip coils at the entry side of a processing line incorporating a preferred embodiment of this invention, and FIG.
An arrow view is shown.

In the figure, number 1 is a strip coil, 2 is a walking beam conveyor, 3 is a fixed beam, and 4
1 is a movable beam, 5 and 6 are coil skids, 7 is a cradle roll, and 8 is a motor for driving the rotation thereof. This motor 8 is provided with a pulse oscillator (not shown). Further, numeral 9 is a sag detection device, and this detection device 9 is connected to a trolley _9-1 and a droop detector _9-1 , as shown in detail in FIG.
A rangefinder 9 _-2 which can be a laser rangefinder installed above, a rotating shaft 9 _{-3 having the rangefinder 9 -2 at} its tip, a rotational drive means 9 _-4 and a means for raising and lowering these as a unit. It consists of a lifting section _9-5 and a lifting motor _9-6 .

Note that 10 is a coil car and 11 is a payoff reel.

Now, the strip coil 1 is sent from a previous process by a crane or the like, and is placed on a cradle roll 7 on a fixed beam 3 of a walking beam type conveying device 2. The movable beam 4 supports the coil 1 with a coil skid 6 provided on its upper surface, and by repeating the cyclic movement of rising, advancing, descending, and retreating, the movable beam 4 is placed on the coil skid 5 on the fixed beam 3 in the left direction in FIG. It is fed in pitches while being placed. In this way, the coil 1 is transferred to the coil car 10, and by the movement of the coil car 10, it is attached to the payoff reel 11, and then the attached coil 1 is rewound and subjected to a predetermined treatment. There is.

However, as described above, if sag occurs in the inner diameter portion of the coil, the rewinding process will not proceed smoothly. Therefore, in this invention, when the strip coil 1 is placed on the cradle roll 7, whether or not sag occurs is detected and corrected in the following manner.

First, by running the trolley _9-1 on the rail _9-7 , the distance meter _9-2 is inserted into the inner diameter portion _1c of the coil. At this time, the lifting section _9-5 and the motor _9-6 are moved so that the center of the rotating shaft _9-3 coincides with the axial center of the coil 1.
The coil size information in this case may be obtained from a process computer or from a coil height alignment device (not shown) usually installed at the line entrance. good. The distance meter 9 _-2 inserted into the inner diameter portion 1 _c of the coil is thus rotated through 360 degrees, and the presence or absence of sag and the position of the sag are detected from the relationship between the rotation angle θ and the output l of the distance meter. Based on the obtained results, the cradle roll 7 is rotated by the motor 8, and the coil is rotated so that the sagging of the coil 1 is on the lower side of the coil. This allows the sag to disappear due to its own weight.

FIG. 4 shows a control block diagram. As described above, the distance meter ₉ inserted into the inner diameter part _1c of the coil
₂ is a controller 13 based on a command from the controller 12;
and one rotation via motor _9-4 . At this time, the distance l from the distance meter 9 _-2 to the inner peripheral surface of the coil and the rotation angle θ of the distance meter 9 _-2 are output to the controller 12. For example, if there is a sag _1e , the relationship between the distance l and the rotation angle θ will be as shown in FIG. In this way, it can be seen that when the sagging portion 1 _e exists, the position angle of the tip thereof is θ〓. Based on this result, the cradle roll 7 is driven via the controller 15 and the motor 8, and the coil 1 is driven. Based on the output of the rotation detector 16, θ〓 or equivalent amount (θ〓-60° to θ〓+90
°
If the sagging portion _1e is rotated by a certain amount (about 100 degrees), the sagging portion 1e will be positioned downward, and the sagging will be corrected.

In addition, although the above-mentioned embodiment mainly explained the case of a walking beam type conveyance device, there is no need to be limited to this.

In addition, although the cradle roll has been described as being installed at the rightmost end in Figure 1, it is not necessary to limit it to this position, and although the sag detection device has been described as a trolley type, a distance meter is installed on the inner diameter of the coil. Anything that can be inserted is fine.

Furthermore, in order to measure the distance from the rangefinder to the inner peripheral surface of the coil over the entire circumference, the rangefinder is rotated, but the coil itself may be rotated using a cradle roll.

(Effects of the invention) Thus, according to this invention, the sag on the inner diameter of the coil can be corrected automatically, so the coil can be attached to the payoff reel without cutting the sagging part, which in turn eliminates the need for the operator to cut the sagging part. This reduces the load and greatly contributes to improving yield.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a strip coil conveyance facility on the entry side of a processing line incorporating a preferred example of this invention;
The figure shows a detailed view of the sagging detection device, Fig. 4 shows a control block diagram, and Fig. 5 shows the relationship between the rotation angle θ of the coil circumferential surface and the distance l from the axis when sag occurs. This is a graph. 1... Strip coil, 2... Conveyance equipment, 3
...Fixed beam, 4...Movable beam, 5,6...
Coil skid, 7...Cradle roll, 8...
...Motor, 9...Sag detection device, 9 _-1 ...Dolly,
9 _-2 ... Distance meter, 9 _-3 ... Rotating shaft, 9 _-4 ... Rotation drive means, 9 _-5 ... Lifting section, 9 _-6 ... Lifting motor, 9 _-7 ... Rail, 10 ...Coil car, 11
...Payoff reel, 12...Controller, 1
3...Controller, 14...PLG, 15...Controller,
16... Rotation detector.

Claims (1)

[Scope of utility model registration request] A cradle roll on which a strip coil is placed horizontally and rotated around its axis, and a range meter that is installed in the inner diameter space of the strip coil and measures the distance from the coil axis to the inner circumferential surface of the coil. In order to guide the sag to the lower side based on the detection data from the device and the sag detection device,
A strip coil inner diameter sag correction device comprising a controller that controls the rotation of the cradle roll.