JP2003136391A - Roll reciprocating brushing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brushing device equipped with position detectors for respective left and right ends of a metal strip that are not affected by metal powder produced in brushing and wash water and are not damaged by contact with the metal strip. SOLUTION: The brushing device having a roll stand controlled by a control means to reciprocate along the width of the metal strip is equipped with the position detectors, attached to the roll stand, for detecting the respective widthwise ends of the metal strip. The position detectors are equipped with respective ejection parts for ejecting linear flow of water or air from one of front and back sides of the metal strip toward the other side in respective positions corresponding to respective ends of each brush roll, and respective reception parts, disposed opposite to the respective ejection parts across the metal strip, for receiving the ejected linear flow of water or air and outputting a detected signal resulting from the presence or absence of the ejection of the linear flow to the control means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating roll type brushing apparatus, and more particularly, to a widthwise direction of a strip-shaped metal plate (hereinafter referred to as "metal strip") traveling in a length direction which is an object of brushing treatment. The present invention relates to a roll reciprocating brushing device having a position detecting device for detecting an end portion.

[0002]

2. Description of the Related Art In a metal strip manufacturing line such as a steel mill or the like, a metal brush is brushed by a brushing device. Generally, a brush roll that is longer than the width of the metal strip is used, and the wear of the brush is such that the area protruding beyond the widthwise edges of the metal strip (hereinafter referred to as the “left and right edges”) remains without rubbing. As a result, it becomes difficult to use the metal strip having a wider width, and the width which can be brushed is gradually reduced.

In order to prevent such uneven wear of the brush roll, there has been proposed a brush roll machine which reciprocates the brush roll in the width direction of the metal strip with a constant stroke while brushing. Furthermore, since the metal strip progresses while meandering to some extent, it is difficult to sufficiently suppress uneven wear by brushing with a constant stroke, and brushing that reciprocates the brush roll within the width of the metal strip. A device has been developed by the applicant (Japanese Patent Laid-Open No. 5-208359).
Issue). The device is capable of accepting metal strips of different widths, and when the brushing process progresses to the lengthwise end region of the metal strip, the end of the metal strip is improved for efficiency of the process. This is a brushing device that can be used even when new metal strips of different widths are welded and connected and the brushing process is continued.

FIG. 8 is a plan view and a front view of a conventional brushing device, and FIG. 9 is a perspective view showing a position detecting device 900 at the left and right ends of a metal strip used in the brushing device.

In FIG. 8, a brush roll stand 1
Is equipped with two brush rolls 2 for brushing the metal strip P, which are rotated by two motors 5. Below the brush roll stand 1, a guide rail 3 for guiding movement and a linear bearing 4 are provided. The brush roll stand 1 and the motor 5 are reciprocally moved in the width direction of the metal strip P by a drive mechanism section 7 including a variable speed servo motor 6, a feed screw, and a ball screw (neither is shown). The base 910 of the position detection device 900 is the brush roll stand 1
It is fixed to.

As shown in FIGS. 9A and 9B, the position detecting device 900 includes a stopper 901, an arm 902,
Rod 903, slit plate 904, switch fixing means 9
05, the slit plate 904 has a slit 906, and the switch fixing means 905 is provided with a transmitting portion 907 and a receiving portion 908 of the photoelectric switch so as to face each other. As the light transmitted from the transmission unit 907 of the photoelectric switch, directional light such as a laser having a small spread is used. The receiving unit 908 receives the light transmitted from the transmitting unit 907, and controls the received signal via the cable (not shown) to the servo motor 6 (not shown).
To transmit.

The arm 902 is capable of rotating about an axis 909, moves after receiving an external force from an initial position, and then returns to the initial position when released from the external force. (Not shown). In the initial state, the stopper 901 has the shaft 908.
The slit 906 is located at a position projecting to the metal strip side with respect to the path of the light emitted from the transmitter 907 of the photoelectric switch, and the slit 906 emits the light.
It is arranged so as to be blocked by 04. When the brushing process is started, the brush roll stand 1 starts reciprocating motion, whereby the brush roll reciprocates in the axial direction, and the two position detecting devices 900 also reciprocate.

In order to reduce uneven wear of the brush roll,
The position detection device 900 is attached to the brush roll stand 1 so that the stopper 901 is located at the end of the brush roll. In the brushing process, the stopper 901 of the position detecting device 900 and the left and right ends of the metal strip P come into contact with each other due to the reciprocating motion of the brush roll stand 1 and the meandering of the metal strip P. At this time, the stopper 901 is pushed by the metal strip P and the slit plate 904 moves. On the other hand, the switch fixing means 905 is fixed to the brush roll stand 1. Therefore, the stopper 901
When is pushed by the metal strip P for a predetermined distance, the slit 906 moves, and the light from the transmission unit 907 of the photoelectric switch passes through the slit 906. As a result, a reception signal is output from the reception unit 908 to the control device, and the control device causes the metal strip P
Judges that the stopper 901 has come into contact with the stopper 901, and moves the brush roll stand 1 in the direction in which the stopper 901 is pushed. In this way, the brush roll 2 reciprocates within the width of the metal strip P.

The metal strip to be brushed may have a very thin plate with a sharp end face like a knife, or a thick plate with an unprocessed end face that is saw-shaped. is there. In these cases, even if the metal strip P is slightly touched, the position detection device 900 is damaged or rattling that affects the position detection accuracy occurs. Therefore, in order to avoid excessive contact, a retracting mechanism (not shown) that detects a faint contact and promptly retracts the stopper 901 is also provided. Receiver 90
Upon receiving the signal from 8, the controller reverses the brush roll 2 and at the same time actuates the retracting mechanism to rapidly separate the portion of the stopper 901 from the metal strip.

[0010]

The above-mentioned position detecting device for the left and right ends of the metal strip protects the electric circuit part by avoiding the metal powder generated by the brushing process and the washing water sprayed on the metal strip. It was necessary to position the photoelectric switch part away from the stopper, and the mechanism was complicated.

Further, the mechanism of the position detecting device is liable to deteriorate the detection accuracy such as the smoothness of the movement being deteriorated under the influence of the cleaning water and the metal powder and the occurrence of the play due to the contact with the metal strip. There was a problem.

Further, a mechanism for avoiding damage due to contact with the metal strip must be provided, and high detection accuracy is required for promptly retracting the stopper of the position detecting device, and maintenance work of the position detecting device is required. Was also often needed.

In order to solve the above-mentioned problems, the present invention is less susceptible to the effects of metal powder and cleaning water during brushing treatment, and does not suffer damage due to contact with the metal strip. An object of the present invention is to provide a roll reciprocating brushing device equipped with a position detection device.

[0014]

The object of the present invention is achieved by the following means.

That is, the roll reciprocating brushing apparatus according to the present invention comprises a brush roll stand equipped with a brush roll for brushing a metal strip, a moving means for moving the brush roll stand, and a control means. A roll reciprocating brushing device in which a stand is controlled by the control means to reciprocate in the width direction of the metal strip, the position being attached to the brush roll stand and detecting an end portion in the width direction of the metal strip. A detection device is provided, and the position detection device injects water or air as a linear flow from one side of the front and back surfaces of the metal strip toward the other side at positions corresponding to both ends of the brush roll. Is disposed on the opposite side of the metal strip from the respective injection portions. Receiving the emitted water or linear flow of air, and a receiving unit that outputs a detection signal due to the presence or absence of incidence of the linear flow to the control means.

Further, the receiving means includes a casing having an opening at one end thereof through which the linear flow is incident, and a detection piece housed in the casing, and the detection piece is movable in the casing. The casing is accommodated and is positioned at the one end side in the casing by receiving gravity or spring force when there is no incidence of the linear flow, and the casing resists the gravity or spring force by the incidence of the linear flow. Can be moved to the other end side.

Further, the receiving portion includes a switch,
The switch may output the detection signal to the control means due to movement of the detection piece.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front view of a roll reciprocating brushing device according to an embodiment of the present invention, showing a portion to which a position detecting device is attached and the vicinity thereof.

The main body of the brushing device has the same structure as in FIG. The two position detecting devices 100 are attached to the corresponding positions of the ends of the supporting means 120 at predetermined intervals via an attaching position adjusting means 110 capable of adjusting the attaching position in the horizontal direction with respect to the brush roll stand 1. ing. The position detecting device 100 includes an emitting unit 101 and a receiving unit 1.
02, a pipe 103 is provided, and water pressurized via a water pump (not shown) and sent through the pipe 103 is directed from the injection unit 101 to the receiving unit 102, that is, from the bottom. It is ejected upward as a linear flow.

2A and 2B are cross-sectional views of the receiving portion 102. FIG. 2A shows a state where the water W ejected from the ejection portion 101 is incident, and FIG. 2B is a state where the ejection water W is incident. It shows that there is no. The receiving portion 102 is a high frequency induction type proximity switch 201, a cylindrical body 204 having a lower end opened and an escape hole 205 formed in an upper end, a holding body made of a non-conductive material such as resin and a conductive material such as metal therein. Detecting piece 202 provided with 203 and U-shaped tube 2 connected to escape hole 205
It is equipped with 06. When the receiving part 102 receives the injection water W from the emission part 101, the detection piece 202 is pushed up by the injection water W, and the conductive material 203 is located away from the proximity switch 201 (see FIG. 2). (A)). On the other hand, when the receiving portion 102 does not receive the incident water W, the detection piece 202 is located at the lowermost part of the tubular body 204 and is located near the proximity switch 201.
The second conductive material 203 is located ((b) of FIG. 2).

The high frequency induction type proximity switch 201 generates a high frequency magnetic field in the vicinity by an oscillator (not shown) inside the switch, and if there is a conductive material in the vicinity, the high frequency magnetic field generates an eddy current on the surface of the conductive material. generate. The presence or absence of the conductive material can be detected by the change in the oscillation level of the oscillator due to the energy loss caused thereby. Therefore, as shown in FIGS. 2A and 2B, the proximity switch 201 detects a change in the position of the conductive material 203 inside the detection piece 202, and thus the ejection unit 1 is attached to the receiving unit 102.
It is possible to judge whether the water ejected from 01 has arrived.

The escape hole 205 is pushed up by the injection water W and is closely attached to the inside of the cylindrical body 204.
However, when the injected water W is no longer incident, the U-shaped tube 206 is provided so that it can be quickly dropped.
This is to prevent wash water sprinkled during brushing from entering the inside of the cylindrical body 204. In addition, the detection piece 202 is provided with flanges at the upper and lower portions in order to smooth the vertical movement within the tubular body 204. The flange has a shape in which the entire circumference of the flange is not inscribed in the tubular body 204 ((a) in FIG. 3) or drainage in order to quickly discharge the water accumulated in the gap between the tubular body 204 and the detection piece 202. It is desirable to have a shape provided with holes for use ((b) of FIG. 3).
3A and 3B are sectional views taken along line III-III in FIG.

Next, the position detecting device 100 shown in FIGS.
The detection processing of the left and right ends of the metal strip using is described.

FIGS. 4A to 4C show the brush roll 2
(The lower brush roll is omitted.), The metal strip P, and the positional relationship between the two position detecting devices 100 (ejecting unit 101 and receiving unit 102) are shown. FIG. 4A shows an initial state before the brushing process is started, and the ejection unit 101 and the receiving unit 102 are set at positions corresponding to both ends of the brush roll 2.

When the brushing process is started, the brush roll stand 1 performs brushing while reciprocating. At this time, water is ejected from the ejection unit 101 to the receiving unit 102, and the detection piece 202 maintains the state of being pushed up by the incident water. Here, the brush roll stand 1
Is assumed to move to the right from the state of FIG.
As a result, the brush roll 2 fixed to the brush roll stand 1 and the position detecting device 100 also move to the right, and as shown in FIG.
Comes to a position where it blocks the water W that is ejected from the ejection part 101 on the left side. As a result, the ejected water W does not reach the receiving portion 102, the detection piece 202 falls ((b) of FIG. 2), and as described above, from the proximity switch 201, the left end of the metal strip P is at a predetermined position, that is, A detection signal indicating that the brush roll 2 has reached the left end is output. The control device (not shown) uses the proximity switch 2 via the signal cable 207.
Upon receiving the detection signal from 01, the brush roll stand 1 is moved to the left in order to move the brush roll 2 to the left.

Similarly, FIG. 4C shows a state in which it has been detected that the right end of the metal strip P has reached the right end of the brush roll 2 as a result of the brush roll stand 1 moving to the left. In this case, the control device receiving the detection signal from the proximity switch 201 performs control to move the brush roll stand 1 to the right.

As described above, when the position detecting devices 100 are attached to the positions corresponding to both ends of the brush roll 2 wider than the metal strip P and it is detected that the ends of the metal strip P reach that position, By changing the moving direction of the brush roll stand 1, it is possible to reduce uneven wear of the brush. Even if left and right movements due to meandering of the metal strip P are applied, the end portion of the metal strip P can be detected in the same manner. Further, it is possible to cope with a change in the width of the metal strip P.

FIG. 5 is a sectional view showing a position detecting device 500 according to another embodiment of the present invention, and like the position detecting device 100 shown in FIG. 1, it has an emitting part 501 and a receiving part 502. However, the injection unit 101 and the receiving unit 102 shown in FIG.
The installation position is reversed. Figure 6
FIG. 6 is a cross-sectional view of the receiving portion 502 of the position detection device 500 shown in FIG. 5, where (a) shows a state where the ejected water W is incident, and (b) shows a state where the ejected water W is not incident. Shows.

FIG. 6 is similar to FIG.
1, a cylindrical body 604, a detection piece 602 having a conductive substance 603 therein, a water drain hole 605, and a spring 606. With this structure, in FIG. 6A, the detection piece 602 is pushed in by the force of the injection water W stronger than the repulsive force of the spring 606, and the conductive substance 603 is positioned away from the proximity switch 601. is doing. Further, in FIG. 6B in which water is not incident, the spring 606 extends, the detection piece 602 is located above the cylindrical body 604, and the conductive material 603 is located near the proximity switch 601. .

FIG. 7 is a sectional view showing a position detecting device 700 according to still another embodiment of the present invention. 7 differs from the position detection device 100 shown in FIG. 1 in the structure of the receiving portion 102. The receiving portion 702 of FIG.
Is provided with a proximity switch 711 and a detection piece 712, and the detection piece 712 is provided with a dish portion 713 that receives the injection water W, and has a structure capable of rotating around a pin 714. The pin 714 is arranged such that the center of gravity when the detection piece 712 and the dish portion 713 are integrated is located on the right side of the pin 714. The proximity switch 711 is an electromagnetic induction type switch as in FIG. 1, and the detection piece 712 is made of a conductive material. In the state of FIG. 7A, the plate portion 71
The injection water W hits 3 and the right end of the detection piece 714 rises,
The detection piece 712 is located away from the proximity switch 711. On the other hand, as shown in FIG. 7B, when the ejected water W does not enter the dish portion 713, the left end of the detection piece 714 is lowered, and the left end of the detection piece 712 is the proximity switch 711.
It will be located in the vicinity of.

The receiving portion 50 shown in FIGS. 6 and 7 described above.
2, 702 have the same function as the receiving portion 102 of the position detecting device 100 shown in FIG. 1, and can be used for detecting the end portion of the metal strip P.

In the description based on FIG. 4, it has been described that the position detecting device 100 is installed at positions corresponding to both ends of the brush roll 2, but in consideration of the movement of the detection piece 202 and the delay of control, the metal strip is installed. The position adjusting means 11 is positioned slightly inward from the positions corresponding to both ends of the brush roll 2 so that the ends of the metal strip P can be detected a little faster than P reaches both ends of the brush roll 2.
It is desirable to adjust by 0, and the "corresponding position" includes a case where there is such a slight shift that is advantageous or does not hinder the control.

In FIGS. 2 and 6, the jet water W is received by the receiving portion 1.
If it has not reached 02, 502, the conductive material 20
3, 603 is configured to approach the proximity switches 201 and 601, but the position of the conductive material inside the detection pieces 202 and 602 is changed so that the conductive material 203 and 603 receives the injected water W. Even if the structure is such that it approaches the proximity switches 201 and 601 and separates from the proximity switches 201 and 601 when the ejected water W is not incident, the position of the end portion of the metal strip P can be similarly detected.
Similarly, in FIG. 7, when the ejected water W is not incident on the receiving portion 702, one end of the detection piece 712 made of a conductive material approaches the proximity switch 711, but the ejected water W is incident. In such a case, one end of the detection piece 712 may be configured to approach the proximity switch 711.

With respect to the mechanism of the receiving portion, changing the shape of the detection piece, changing the moving direction of the detection piece, and the proximity switch and the detection piece within a range in which the proximity switch can detect the displacement of the detection piece. It is possible to make various changes such as changing the positional relationship of (1), and providing a structure including a restoring means other than gravity and spring force.

Further, although the case where a high frequency induction type switch is used as the proximity switch has been described, the LC resonance circuit is provided, and a substance is detected as a change in the resonance state due to a change in the capacitor capacitance due to the proximity of the dielectric substance. It is also possible to use a capacitance type proximity switch. In that case, it is also possible to use the detection piece which consists only of a dielectric material, without using a conductive material. In addition to these, various contact-type or non-contact-type switches that operate by movement of the detection piece can be used.

Further, the detection piece of the receiving part may be a propeller or an impeller rotating by the incident water, and a mechanism for detecting the rotation may be used, or the water pressure of the water entering the receiving part may be detected by a pressure sensor. It is also possible to

In addition, by ejecting a liquid instead of water,
It is also possible to use compressed air or other compressed gas.

[0038]

The roll reciprocating brushing device according to the present invention receives the linear flow of the injected water or air and the injection part for injecting the water or air as a linear flow. Since it is a simple mechanism to attach the position detection device having a receiving portion that outputs a detection signal to the control means due to the presence or absence of the above to the brush roll stand at a position corresponding to each of both ends of the brush roll. Therefore, the position detection accuracy does not deteriorate due to the influence of metal powder or cleaning water, and the brushing of the metal strip can be performed accurately.

Further, a mechanism for avoiding damage due to contact with the metal strip is not required, and the brushing process can be continuously performed with less maintenance than before.

[Brief description of drawings]

FIG. 1 is a front view around a position detecting device of a roll reciprocating brushing device according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a receiving portion of the position detecting device of FIG. 1, where (a) is a state in which ejected water is incident, and (b) is
Indicates a state in which the ejected water is not incident.

3A and 3B are transverse cross-sectional views showing the shape of the flange of the detection piece.

FIG. 4A to FIG. 4C are explanatory views for explaining the detection processing of the left and right ends of the metal strip.

FIG. 5 is a vertical sectional view showing a position detection device according to another embodiment of the present invention.

6 is a vertical cross-sectional view showing the receiving portion of FIG. 5, (a)
Shown is the state where the ejected water is incident, and (b) shows the state where the ejected water is not incident.

FIG. 7 is a vertical cross-sectional view showing a position detecting device according to still another embodiment of the present invention, in which (a) is a state in which ejected water is incident, and (b) is an ejected water incident. It shows that there is no.

FIG. 8 is a plan view and a front view showing a conventional roll reciprocating brushing device.

9A is a perspective view showing a conventional position detecting device, and FIG. 9B is a perspective view showing a positional relationship between a photoelectric switch and a slit.

[Explanation of symbols]

1 brush roll stand 2 brush roll P metal strip W injection water 100,500,700 Position detection device 101 injection part 102, 502, 702 receptor 201, 601, 711 Proximity switch 202, 602, 712 Detection piece 203,603 Conductive material 204,604 Cylindrical body 205 escape hole 206 U-shaped tube 605 drain hole 606 spring 713 plate 714 pin

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 2F069 AA15 BB19 BB34 CC06 DD13                       GG01 GG04 GG06 GG58 HH07                       RR07                 3C034 AA19 BB71 CA11 CB01                 3C043 AC07 CC06 CC11 DD01 DD12                       DD15                 3C058 AA06 AA11 AA16 AA18 BA07                       BC02 CB03

Claims (3)

[Claims] 1. A brush roll stand equipped with a brush roll for brushing a metal strip, a moving means for moving the brush roll stand, and a control means, the brush roll stand being controlled by the control means. Is a roll reciprocating brushing device that reciprocates in the width direction of the brush, and includes a position detection device that is attached to the brush roll stand and detects an end portion of the metal strip in the width direction. An injection unit that injects water or air as a linear flow from one side of the front and back surfaces of the metal strip toward the other side at positions corresponding to both ends of the brush roll; It is arranged on the opposite side of each injection part, receives the linear flow of the injected water or air, and Roll reciprocating brushing device characterized by a detection signal due to the presence or absence of incident and a receiving unit that outputs to the control means. 2. The receiving portion includes a casing having an opening into which the linear flow is incident at one end, and a detection piece housed in the casing, and the detection piece is movable in the casing. When the linear flow is not incident, it is positioned on the one end side in the casing by receiving gravity or spring force, and when the linear flow is incident, it resists the gravity or spring force. The reciprocating roll type brushing device according to claim 1, wherein the brush reciprocating type brush moves to the other end side of the casing. 3. The receiving unit includes a switch, and the switch outputs the detection signal to the control means due to movement of the detection piece.
The roll reciprocating brushing device described in.