JPH0131966B2 - - Google Patents

Description

TECHNICAL FIELD The present invention relates to a system for feeding elongated strip-shaped materials having various shapes such as a circular cross-section perpendicular to the axis, for performing press/roll processing or the like.

Prior Art A typical prior art is shown in FIG.
A hoop-shaped strip material 2 wound around an uncoiler 1 can freely rotate, is pulled by a leveler 3, and is supplied to a processing device 4 such as a press or roll processing. The strip-shaped material 2 in the uncoiler 1 is freely rotated and thereby deflects as indicated by reference numeral 2a. The leveler 3 includes a pair of rollers 6 driven by a motor 5 and a plurality of guiding rollers 7, and sends out the strip-shaped material to the processing device 4 side. The processing device 4 is provided with a roller 8 driven by a motor 7, which pulls the strip-shaped material which has a deflected portion indicated by reference numeral 2b, and performs processing such as press and roll processing. On the downstream side of the leveler 3, a detection means 10 is provided for detecting the amount of deflection of the deflection portion 2b.
The deflection amount detection means 10 includes a first detector 11 that detects the tension position of the deflection portion 2b, and a second detector 12 that detects the deflection amount below the tension position. When the deflection portion 2b is detected by the second detector 12, the motor 5 and the feed roller 6 are stopped. In this state, processing is performed in the processing device 4 while the flexible portion 2b is being pulled and supplied by the tension roller 9. As a result, when the deflected portion 2b is detected by the first detector 11, the motor 5 and feed roller 6 of the leveler 3 feed the strip-shaped material to the processing device 4 side again. Therefore, when the amount of deflection increases and the second detector 12 detects the deflected portion 2b, the motor 5 and the feed roller 6 are stopped again.

The leveler 3 smoothly supplies the strip material 2 to the processing device 4 and enables the strip material 2 to be fed as horizontally as possible in the vicinity of the tension roller 9 of the processing device 4. Therefore, a relatively long distance is required between the leveler 3 and the processing device 4. In addition, a bending portion 2a is formed so that the leveler 3 can pull the strip material 2 from the uncoiler 1 and send it smoothly to the processing device 4. Therefore, the distance between the uncoiler 1 and the leveler 3 is relatively long. I have no choice but to do it. Thus, in the prior art, the mutual spacing between the uncoiler 1, the leveler 3, and the processing device 4 is relatively long, requiring a large installation space in the factory. Along with this, the bending part 2
In order to prevent workers from coming into contact with a and 2b, a safety fence must be provided over a relatively long distance between the uncoiler 1 and the leveler 3 and between the leveler 3 and the processing device 4. Must be. This increases equipment costs. The leveler 3 also pulls and sends out the strip material 2,
Or they have stopped sending out. Therefore, it is difficult for the processing device 4 to process the strip-shaped material continuously at high speed. What is worse, in order to be able to pull the strip-shaped material 2 from the uncoiler 1 with a large force by the feed roller 6, it is necessary to clamp the material 2 with a large force in the thickness direction. Material 2 for that purpose
There is a problem in that compressive stress acts on the material and the quality of the product processed by the processing device 4 deteriorates. When the surface of the strip material 2 is made of a particularly soft material, such as aluminum, or when the surface must be prevented from being scratched as much as possible, the leveler 3 and processing device 4 may In order to prevent damage during tension or compression, a protective layer is previously attached to both surfaces of the strip material 2, and the protective layer is removed after processing is completed by the processing device 4. Therefore, productivity will be extremely reduced.

Purpose The purpose of the present invention is to improve productivity by making it possible to continuously supply and process a strip-shaped material, and to do so without applying undesired tensile or compressive forces to the strip-shaped material. Therefore, it is an object of the present invention to provide a belt-like material feeding system such as press/roll processing, which makes it possible to obtain high-quality products.

The present invention comprises: (a) Wrapping the strip material 2 around the horizontal axis;
An uncoiler 1 that sends out the material 2 from the upper part by a motor 20, (b) a leveler 3, (b1) a pair of upper and lower delivery rollers 22 that pinch and send out the material 2 from the uncoiler 1, (b2 ) is arranged subsequent to the feed roller 22,
Such a leveler 3 having a plurality of rollers 24 for guiding the material 2; (b3) a second motor 21 for driving the delivery roller 22; (c) a processing device 4, comprising: (c1) a leveler 3; (c2) a pair of upper and lower tension rollers 26 that clamp and pull the material 2 from the wafer; and (c2) a third motor 2 that drives the tension rollers 26.
(d) a first deflection amount detection means 32 disposed near the leveler 3 between the leveler 3 and the processing device 4; (d1) a first upper limit detector 33 that detects a slight first deflection amount downward than when the material 2 is under tension; (d2) a first upper limit detector 33 that is arranged below the first upper limit detector 33 and that a first lower limit detector 3 for detecting a second downward deflection amount that is larger than the first deflection amount detected by the first upper limit detector 33;
(e) a first upper limit detector 33 and a first lower limit detector 34;
When the first deflection portion 2d of the material 2 between the leveler 3 and the processing device 4 is detected by the first upper limit detector 33 in response to each output of When the second motor 21 is driven and the first deflection portion 2d is detected by the first lower limit detector 34, a second speed smaller than the first speed is detected.
The second motor 2
(f) a second deflection amount detection means 27 disposed between the uncoiler 1 and the leveler 3 closer to the leveler 3; (f1) when the material 2 is under tension; (f2) a second upper limit detector 28 that detects a slight third deflection amount downward than the second upper limit detector 28; a second lower limit detector 2 for detecting a fourth downward deflection amount that is larger than the detected third deflection amount;
(g) a second upper limit detector 28 and a second lower limit detector 29;
In response to each output, uncoiler 1 and leveler 3
When the second deflection portion 2c of the material 2 between the two is detected by the second upper limit detector 28, the first motor 20 is driven at a third speed at which the amount of deflection increases;
and means for driving the first motor 20 such that when the second deflection portion 2c is detected by the second lower limit detector 29, the amount of deflection is reduced at a fourth speed smaller than the third speed. This is a belt-like material feeding system for press/roll processing, etc., which is characterized by:

In addition, the present invention provides the following methods: (a) The strip material 2 is wound around the horizontal axis, and the first
An uncoiler 1 that sends out the material 2 from the upper part by a motor 20, (b) a leveler 3, (b1) a pair of upper and lower delivery rollers 22 that pinch and send out the material 2 from the uncoiler 1, (b2 ) is arranged subsequent to the feed roller 22,
Such a leveler 3 having a plurality of rollers 24 for guiding the material 2; (b3) a second motor 21 for driving the delivery roller 22; (c) a processing device 4, comprising: (c1) a leveler 3; (c2) a pair of upper and lower tension rollers 26 that clamp and pull the material 2 from the wafer; and (c2) a third motor 2 that drives the tension rollers 26.
(d) a first deflection amount detection means 32 disposed near the leveler 3 between the leveler 3 and the processing device 4; (d1) a first upper limit detector 33 that detects a slight first deflection amount downward than when the material 2 is under tension; (d2) a first upper limit detector 33 that is arranged below the first upper limit detector 33 and that a first lower limit detector 3 for detecting a second downward deflection amount that is larger than the first deflection amount detected by the first upper limit detector 33;
4, (d3) a first abnormal upper limit detector 35 which is arranged above the first upper limit detector 33 and detects the amount of abnormal upward deflection of the material 2; (d4) from the first lower limit detector 34. such a first deflection amount detection means 32, including a first abnormality lower limit detector 36 which is disposed below the material 2 and detects an abnormal downward deflection amount that is larger than the second deflection amount of the material 2; e) First upper limit detector 33 and first lower limit detector 34
In response to the respective outputs of the first abnormality upper limit detector 35 and the first abnormality lower limit detector 36, the first deflection portion 2d of the material 2 between the leveler 3 and the processing device 4 is detected as the first abnormality upper limit detector. 33, the second motor 21 is driven at a first speed at which the amount of deflection increases, and when the first deflection portion 2d is detected by the first lower limit detector 34, the second motor 21 is driven at the first speed. The second motor 21 is driven so that the amount of deflection becomes smaller at a second speed smaller than the first abnormality upper limit detector 3.
5 and means 38, 52, 55, 39 for stopping the second motor 20 when the second abnormality lower limit detector 36 detects an abnormal deflection amount of the material 2;
42, 46, and (f) a second deflection amount detection means 27 disposed between the uncoiler 1 and the leveler 3 closer to the leveler 3, and (f1) a second deflection amount detection means 27 that detects a slight downward deflection of the material 2 when the material 2 is under tension. a second upper limit detector 28 that detects a third deflection amount; (f2) a third deflection amount that is located below the second upper limit detector 28 and is detected by the second upper limit detector 28 of the material 2; a second lower limit detector 2 for detecting a fourth downward deflection amount larger than
9, (f3) a second abnormal upper limit detector 30 which is arranged above the second upper limit detector 28 and detects the amount of abnormal upward deflection of the material 2; (f4) from the second lower limit detector 29; (g ) second upper limit detector 28 and second lower limit detector 29
In response to the outputs of the second abnormality upper limit detector 30 and the second abnormality lower limit detector 31, the uncoiler 1
and the second deflection portion 2c of the material 2 between the leveler 3 and the leveler 3.
is detected by the second upper limit detector 28,
At the third speed where the amount of deflection increases, the first motor 20
and when the second deflection portion 2c is detected by the second lower limit detector 29, the first motor 20 is driven so that the amount of deflection is reduced at a fourth speed smaller than the third speed; Press roll processing characterized by including means for stopping the first motor 20 when the second abnormality upper limit detector 30 and the second abnormality lower limit detector 31 detect an abnormal deflection amount of the material 2. This is a belt-like material feeding system.

Embodiment FIG. 2 is an overall system diagram of an embodiment of the present invention. A hoop-shaped strip material 2 provided with a horizontal axis on the uncoiler 1 is driven by a motor 2.
It is sent to the leveler 3 side by the power of 0. The leveler 3 has a feed roller 22 driven by a motor 21. This feed roller 22
The strip-shaped material from the uncoiler 1 is pulled and sent to a processing device 4 that performs press/roll processing and the like. The leveler 3 is provided with a plurality of rollers 24 following the feed roller 22 for guiding. The processing device 4 is equipped with a motor 25, and a tension roller 26 pulls the strip material 2 from the leveler 3. The strip-shaped material 2 stretched and supplied by the tension roller 26 is subjected to press/roll processing, etc.

On the downstream side of the uncoiler 1, a detection means 27 is provided for detecting the amount of deflection of the portion indicated by the reference numeral 2c sent out by the power of the motor 20. The amount of deflection of the deflected portion 2c of the strip material 2 from the uncoiler 1 is detected by the first detector 28 and the second detector 29 under normal operating conditions. The third detector 30 detects the amount of upward deflection of the deflection portion 2c when the deflection portion 2c is abnormal. Further, an abnormally large amount of downward deflection is detected by the fourth detector 11.

The strip material 2 supplied from the leveler 3 to the processing device 4 is slightly bent as shown by reference numeral 2d under normal conditions. The amount of deflection of the bent portion 2d is detected by the amount of deflection detection means 32. The deflection amount detection means 32 detects the deflection portion 2d during normal operation.
a first detector 33 that detects a slight first deflection amount downward than when under tension;
3, and a second detector 34 for detecting a second downward deflection amount that is larger than the deflection amount detected by the deflection portion 2d during abnormal operation.
It includes a third detector 35 that detects the amount of upward deflection, and a fourth detector 36 that detects the amount of downward deflection of the deflection portion 2d in an abnormal state.

FIG. 3 is an enlarged view showing the bent portion 2d of the strip material 2 between the leveler 3 and the processing device 4. When the material strip 2 is under tension, it lies, for example, in a horizontal plane, as indicated by the reference numeral 37, and is subjected to a tensile stress. In order to prevent undesired stress from acting on the strip material 2, between the leveler 3 and the processing device 4, proper first and second A second amount of deflection is provided. As described above, the first detector 33 detects that the deflected portion 2d is deflected slightly below the tension position 37 by the first deflection amount. Further, the second detector 34 detects that the second amount of deflection is greater than the first amount of deflection.

FIG. 4 shows a deflection amount detection means 32 for detecting the deflection amount of the deflection portion 2d shown in FIGS. 2 and 3.
FIG. 2 is an electrical circuit diagram related to The motor 21 provided in the leveler 3 is an induction motor, and is connected to a switch 39 from a frequency conversion circuit 38 such as an inverter.
The rotation speed depends on the frequency of the electric power supplied through the motor. The frequency conversion circuit 38 includes:
Three-phase AC power is supplied via switch 40. Switches 39 and 40 are rendered conductive by excitation of relay coils 43 and 44 of relays 41 and 42. A normally conductive switch 45 and an emergency cutoff switch 47 of a relay 46 are connected in series to the relay coil 43. relay coil 4
4, an operation switch 48 and an emergency cutoff switch 49 are connected in series. Frequency conversion circuit 38 has two input terminals 50 and 51.
A high level signal is applied to the input terminal 50 via the relay switch 54 of the relay 52, which causes the frequency conversion circuit 38 to switch the motor 21 to the first
Provides power at a high frequency, for example 35Hz. When a high level signal is applied to the other input terminal 51 via the relay switch 56 of the relay 55, the frequency conversion circuit 38 supplies the motor 21 with power at a second lower frequency, for example 30 Hz. Relay coils 57 and 58 of relays 52 and 55 together with relay switches 59 and 60 constitute an interlock circuit. The first and second detectors 33, 34 are connected to the relay switches 59, 60, and the relay switches 61, 62 of the relays 52, 55 are further connected. The third and fourth detectors 35 and 36 connected in parallel are connected in series to the relay coil 63 of the relay 46 .

When the bending portion 2d is between the first detector 33 and the second detector 34 and the switch 45 is conductive, the relay coil 43 is excited. This makes the relay switch 39 of the relay 41 conductive. When the operating switch 48 is operated, the relay coil 44 is excited and the relay switch 40 of the relay 42 becomes conductive. The strip-shaped material 2 is pulled and processed by the processing device 4, and the deflection portion 2d becomes a first deflection amount and is detected by the first detector 33.
When detected by , the contact 33a becomes conductive. As a result, the relay coil 57 of the relay 52
is excited. Therefore, the relay switch 54 becomes conductive, and a high level signal is applied to the input terminal 50 of the frequency conversion circuit 38. Frequency conversion circuit 38
rotates the motor 21 at a high speed, which is the first speed. As a result, the leveler 3 is bent at the bending portion 2d.
The strip-shaped material 2 is sent to the processing device 4 so that the amount of deflection becomes large. As the amount of deflection of the deflection portion 2d increases, the contact point 33a of the first detector 33
Even if the relay coil 57 is cut off, the relay coil 57 remains energized due to the self-holding action of the relay switch 61. Therefore, even after the deflected portion 2d is no longer detected by the first detector 33, the motor 21 continues to supply the leveler 33 and the strip-shaped material 2 to the processing device 4 at the high speed that is the first speed. It's summery.

When the deflection amount of the deflection portion 2d gradually increases and the deflection portion 2d reaches the second deflection amount, the second detector 3
4, and the contact 34b is cut off. Therefore, at the same time as the self-holding of the relay 52 is released, the contact 34a becomes conductive, the relay coil 58 of the relay 55 is excited, and the relay switch 62 self-holds. The relay switch 56 of the relay 55 is connected to the input terminal 51 of the frequency conversion circuit 38.
give a high level signal to. As a result, the frequency conversion circuit 38 rotates the motor 21 at the second speed, which is a low speed. By rotating the motor 21 at a low speed, the processing device 4 by the leveler 3
The speed at which the strip-shaped material 2 is fed decreases, and the amount of flexure of the flexure portion 2d gradually decreases. Even after the deflected portion 2d is no longer detected by the second detector 34, the motor 21 continues to be driven to rotate at a low speed by the self-holding action of the relay switch 62, and the leveler 3 lowers the strip material 2. Continue to send out at high speed. In this way, the leveler 3 has the deflection amount of the deflection portion 2d detected by the first detector 33 and the second detector 34.
the first and second detected respectively by
The strip material 2 is constantly supplied within the range of the amount of deflection. Therefore, the processing device 4 smoothly pulls the bent portion 2d, which has a slight amount of bending, and presses it.
Roll processing etc. can be performed. Therefore, not only productivity is improved, but also undesired tensile stress and compressive stress are not applied to the bent portion 2d, and quality is improved. Furthermore, by shortening the distance between the leveler 3 and the processing device 4, the installation space of the factory can be reduced.

When the bending portion 2d is abnormally bent upward or downward due to a malfunction of the processing device 4, the third and fourth detectors 35 and 36 detect the bending of the bending portion 2d. amount is detected. This demagnetizes the relay coil 63 of the relay 46. Therefore, relay switch 47 is cut off and relay coil 43 of relay 41 is demagnetized. Therefore, the relay switch 39 shuts off and the motor 21
The supply of the leveler 3 is stopped due to the stoppage of the leveler 3.

Although the above description has been made in relation to the deflection amount detection means 32 and the leveler 3 and processing device 44, such a configuration can also be implemented in relation to the deflection amount detection means 27 and the uncoiler 1 and the leveler 3. Ru. As a result, the amount of deflection of the bent portions 2c and 2d of the strip material 2 is kept small, and the strip material 2 from the uncoiler 1 can be smoothly supplied to the processing device 4 while remaining substantially horizontal.

The strip of material 2 of the uncoiler 1 is wound around a horizontal axis and, as can be seen in FIG. 2, feeds out the material 2 from above. A pair of upper and lower feed rollers 22 of the leveler 3 are provided to sandwich and feed the material 2 from the uncoiler 1. A pair of upper and lower tension rollers 26 of the processing device 4 are provided in order to clamp and pull the material 2 from the leveler 3.

Effects As described above, according to the present invention, the following effects are achieved.

In the present invention, the first upper limit detector 33 and the second upper limit detector 28 detect the slight first and third deflection amounts downward when the material 2 is under tension. Since the motor 21 and the second motor 20 are driven at the first and third speeds that increase the amount of deflection, the material 2 is Don't be nervous. Therefore, the tension roller 26 in the processing device 4 and the pair of upper and lower delivery rollers 22 in the leveler 3 do not need to clamp the material 2 with a large compressive force. Therefore, material 2 is
Since it is not compressed with a large compressive force in the thickness direction, the material 2 is not damaged. Therefore, the present invention does not require a protective layer to be previously applied to both surfaces of the strip material 2, as described in connection with the prior art described above. Therefore, productivity can be improved. Further, in the present invention, the material 2 is continuously conveyed between the leveler 3 and the processing device 4 and between the uncoiler 1 and the leveler 3 in a constantly bent state without being tensioned. and second motor 2
As described in connection with the prior art, a large starting current does not flow through the motors 21 and 20, and smooth operation is achieved, compared to a configuration in which the motors 21 and 20 are stopped and driven intermittently. It can be carried out.

Further, in the present invention, since the material 2 is continuously supplied as described above, even if the material 2 is intermittently conveyed and processed by the tension roller 26 in the processing device 4, the material 2 can be smoothly supplied. It is possible to do so.

Furthermore, in the present invention, in the uncoiler 1, the strip-shaped material 2 wound around the horizontal axis is fed out from the upper part of the uncoiler 1, so that the material 2 from the uncoiler 1 is prevented from being bent significantly downward, and the material 2 from the uncoiler 1 is material 2 is detected by the second upper limit detector 28 and the second lower limit detector 29. Therefore, the material 2 of the uncoiler 1 is not unraveled to a large extent. Further, between the leveler 3 and the processing device 4, the material 2 is detected by a first upper limit detector 33 and a first lower limit detector 3.
It is bent between 4 and 4. In this way, the distance between the uncoiler 1 and the leveler 3 and the distance between the leveler 3 and the processing device 4 can be shortened, and the structure can be made smaller.

Furthermore, according to the present invention, the first and second deflection amount detection means 32, 27 are arranged closer to the leveler 3, so that the deflection portions 2d, 2 of the material 2
Since the lower part of c is not detected, the configurations of the first and second deflection amount detection means 32 and 27 can be made smaller.

Furthermore, according to the present invention, when the material 2 is deflected abnormally by the first and second abnormality upper limit detectors 35, 30 and the first and second abnormality lower limit detectors 36, 31, First and second motor 2
0 and 21 are stopped, safety is ensured and the material 2 is prevented from being wasted due to bending in such abnormal conditions.

[Brief explanation of drawings]

FIG. 1 is a system diagram of the prior art, FIG. 2 is a system diagram of an embodiment of the present invention, FIG. 3 is an enlarged view between the leveler 3 and the processing device 4, and FIG. 4 is related to the detection means 32. It is an electrical circuit diagram. 1...Uncoiler, 2...Strip material, 2a-2
d... Flexible portion, 3... Leveler, 4... Processing device, 20, 21, 25... Motor, 27, 32...
...Deflection amount detection means, 38...Frequency conversion circuit.

Claims (1)

[Claims] 1 (a) Wrapping the strip material 2 around a horizontal axis;
an uncoiler 1 that sends out the material 2 from the upper part by a first motor 20; (b) a leveler 3; (b1) a pair of upper and lower delivery rollers 22 that pinch and send out the material 2 from the uncoiler 1; (b2) disposed following the feed roller 22;
Such a leveler 3 having a plurality of rollers 24 for guiding the material 2; (b3) a second motor 21 for driving the delivery roller 22; (c) a processing device 4, comprising: (c1) a leveler 3; (c2) a pair of upper and lower tension rollers 26 that clamp and pull the material 2; and (c2) a third motor 25 that drives the tension rollers 26.
(d) a first deflection amount detection means 32 disposed near the leveler 3 between the leveler 3 and the processing device 4, d1) a first upper limit detector 33 that detects a slight first deflection amount downward than when the material 2 is under tension; (d2) a first upper limit detector 33 that is arranged below the first upper limit detector 33 and a first lower limit detector 3 for detecting a second downward deflection amount that is larger than the first deflection amount detected by the upper limit detector 33;
(e) a first upper limit detector 33 and a first lower limit detector 34;
When the first deflection portion 2d of the material 2 between the leveler 3 and the processing device 4 is detected by the first upper limit detector 33 in response to each output of When the second motor 31 is driven and the first deflection portion 2d is detected by the first lower limit detector 34, the second speed is lower than the first speed.
The second motor 2
(f) a second deflection amount detection means 27 disposed between the uncoiler 1 and the leveler 3 closer to the leveler 3; (f1) when the material 2 is under tension; (f2) a second upper limit detector 28 that detects a slight third deflection amount downward than the second upper limit detector 28; a second lower limit detector 2 for detecting a fourth downward deflection amount that is larger than the detected third deflection amount;
(g) a second upper limit detector 28 and a second lower limit detector 29;
In response to each output, uncoiler 1 and leveler 3
When the second deflection portion 2c of the material 2 between the two is detected by the second upper limit detector 28, the first motor 20 is driven at a third speed at which the amount of deflection increases;
and means for driving the first motor 20 such that when the second deflection portion 2c is detected by the second lower limit detector 29, the amount of deflection is reduced at a fourth speed smaller than the third speed. A belt-shaped material feeding system for press/roll processing, etc., featuring: 2 (a) Wrap the strip material 2 around the horizontal axis,
an uncoiler 1 that sends out the material 2 from its upper part by a first motor 20; (b) a leveler 3; (b1) a pair of upper and lower delivery rollers 22 that pinch and send out the material 2 from the uncoiler 1; (b2) disposed following the feed roller 22;
Such a leveler 3 having a plurality of rollers 24 for guiding the material 2; (b3) a second motor 21 for driving the delivery roller 22; (c) a processing device 4, comprising: (c1) a leveler 3; (c2) a pair of upper and lower tension rollers 26 that clamp and pull the material 2 from the wafer; and (c2) a third motor 2 that drives the tension rollers 26.
(d) a first deflection amount detection means 32 disposed near the leveler 3 between the leveler 3 and the processing device 4; (d1) a first upper limit detector 33 that detects a slight first deflection amount downward than when the material 2 is under tension; (d2) a first upper limit detector 33 that is arranged below the first upper limit detector 33 and that a first lower limit detector 3 for detecting a second downward deflection amount that is larger than the first deflection amount detected by the first upper limit detector 33;
4, (d3) a first abnormal upper limit detector 35 which is arranged above the first upper limit detector 33 and detects the amount of abnormal upward deflection of the material 2; (d4) from the first lower limit detector 34. (e ) The first upper limit detector 33 and the first lower limit detector 34
In response to the respective outputs of the first abnormality lower limit detector 35 and the first abnormality lower limit detector 36, the first deflection portion 2d of the material 2 between the leveler 3 and the processing device 4 is detected as the first upper limit detector. 33, the second motor 21 is driven at a first speed at which the amount of deflection increases, and when the first deflection portion 2d is detected by the first lower limit detector 34, the second motor 21 is driven at the first speed. The second motor 21 is driven so that the amount of deflection becomes smaller at a second speed smaller than the first abnormality upper limit detector 3.
5 and means 38, 52, 55, 39 for stopping the second motor 20 when the second abnormality lower limit detector 36 detects an abnormal deflection amount of the material 2;
42, 46, and (f) a second deflection amount detection means 27 disposed between the uncoiler 1 and the leveler 3 closer to the leveler 3, which detects (f1) a slight downward deflection of the material 2 when it is under tension. a second upper limit detector 28 that detects a third amount of deflection; (f2) a third amount of deflection that is located below the second upper limit detector 28 and is detected by the second upper limit detector 28 of the material 2; a second lower limit detector 2 for detecting a fourth downward deflection amount larger than
9, (f3) a second abnormal upper limit detector 30 which is arranged above the second upper limit detector 28 and detects the amount of abnormal upward deflection of the material 2; (f4) from the second lower limit detector 29; (g ) second upper limit detector 28 and second lower limit detector 29
In response to the outputs of the second abnormality upper limit detector 30 and the second abnormality lower limit detector 31, the uncoiler 1
and the second deflection portion 2c of the material 2 between the leveler 3 and the leveler 3.
is detected by the second upper limit detector 28,
At the third speed where the amount of deflection increases, the first motor 20
and when the second deflection portion 2c is detected by the second lower limit detector 29, the first motor 20 is driven so that the amount of deflection is reduced at a fourth speed smaller than the third speed; Press roll processing characterized by including means for stopping the first motor 20 when the second abnormality upper limit detector 30 and the second abnormality lower limit detector 31 detect an abnormal deflection amount of the material 2. etc. strip material feeding system.