JP2011230152A - Method and apparatus for safe cleaning of deflector pinch roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cleaning method and apparatus which enable safe cleaning of deflector pinch rollers.SOLUTION: The method for cleaning deflector pinch rollers for feeding unwound sheet steel into a manufacturing line includes: (i1) activating both a mat sensor A disposed in a working area of a worker who operates a control panel for deflector pinch rollers so as to detect the presence of the worker and a mat sensor B disposed in a working area of a worker who cleans the deflector pinch rollers so as to detect the presence of the worker; then (i2) actuating an area sensor C disposed in front of the deflector pinch rollers so as to detect entrainment of a material object about the rollers; and (ii) the area sensor C sending a signal to stop the deflector pinch rollers from rotating to the control panel when detecting entrainment of a material object about the deflector pinch rollers.

Description

  The present invention relates to a method and apparatus for safely cleaning a deflector pinch roll that unwinds a steel sheet coil and feeds it to a production line, for example, a plating line.

  Usually, when a steel sheet coil is rewound and sent to a production line, for example, a plating line, it is sent through a deflector pinch roll (see, for example, Patent Document 1). In this case, if the steel plate is a cold-rolled steel plate, the surface of the deflector pinch roll is contaminated with the rolling oil remaining on the steel plate surface. When the degree of contamination becomes severe, the roll surface is cleaned using the operation interruption period until the next rewinding of the steel plate.

  Cleaning work is performed by an operator standing on the front of the roll and polishing with a cleaning tool (for example, a cloth soaked in acetone) while rotating the roll. There is a risk that hands will accidentally get caught in the roll because they work standing up.

  The rotation of the roll is performed by another worker standing in front of the control panel in accordance with the progress of the cleaning operation, so that the worker in charge of the rotation of the roll is accompanied by an erroneous action of the worker in charge of cleaning. To avoid danger, the roll rotation and stop must be controlled at the correct work position. That is, the two workers need to proceed with the cleaning work under close cooperation.

  However, since the deflector pinch roll and the control panel are usually arranged apart from each other, the current cleaning operation of the deflector pinch roll is always dangerous.

JP 09-271839 A

  SUMMARY OF THE INVENTION The present invention has been made in view of the current task of cleaning a deflector pinch roll that is dangerous, and it is an object of the present invention to provide a cleaning method and apparatus capable of safely performing the cleaning operation.

  The present inventors diligently studied a method in which two workers can safely clean the deflector pinch roll.

  As a result, an area sensor is provided in front of the deflector pinch roll to detect the entrainment of a tangible object, and the presence of the worker is detected in the work area of the worker in front of the deflector pinch roll and in front of the control panel. We found that the safety of work can be secured by placing the mat sensor and linking the operation of the area sensor and the mat sensor.

  This invention was made | formed based on the said knowledge, and the summary is as follows.

(1) In the method of cleaning the deflector pinch roll that sends the unwound steel sheet to the production line,
(I1) A mat sensor A for detecting the presence of the worker, which is disposed in a work area of the operator who operates the control panel of the deflector pinch roll, and a work area of the worker who cleans the deflector pinch roll, Both mat sensors B that detect the presence of the worker are activated,
(I2) The area sensor C, which is provided in front of the deflector pinch roll and detects the entrainment of a tangible object of the roll, operates.
(Ii) A safe cleaning method for a deflector pinch roll, wherein when the area sensor C detects the inclusion of a tangible object of the deflector pinch roll, a signal for stopping the rotation of the deflector pinch roll is sent to the control panel.

  (2) The safety cleaning method for the deflector pinch roll according to (1), wherein the mat sensor B is activated after the mat sensor A is activated.

  (3) The safe cleaning method of the deflector pinch roll according to (1) or (2), wherein the area of the mat sensor A and the mat sensor B is the same as each work area.

(4) In the cleaning device for the deflector pinch roll that sends the unwound steel sheet to the production line,
(I1) In the work area of the worker who controls the control panel of the deflector pinch roll, lay a mat sensor that detects the presence of the worker,
(I2) A mat sensor that detects the presence of the worker is placed in the work area of the worker who cleans the deflector pinch roll,
(Ii) An area that operates after the operation of the two mat sensors before the deflector pinch roll, detects the entrainment of a tangible object of the roll, and sends a signal to stop the rotation of the deflector pinch roll to the control panel. The sensor was placed
A safety cleaning device for a deflector pinch roll.

  (5) The safety cleaning device for a deflector pinch roll according to (4), wherein the mat sensor B is activated after the mat sensor A is activated.

  (6) The method of safely cleaning a deflector pinch roll according to (4) or (5), wherein the area of the mat sensor A and the mat sensor B is the same as each work area.

  According to the present invention, the cleaning operation of the deflector pinch roll can be performed safely by the cooperation of two workers.

It is a figure which shows typically the cooperation system which ensures the safety of cleaning operation | work in the cleaning operation | work of a deflector pinch roll.

  The present invention will be described with reference to the drawings.

  FIG. 1 schematically shows a cooperation system that ensures the safety of the cleaning work in the cleaning work of the deflector pinch roll.

  In FIG. 1, a steel plate s on which a steel plate coil held in a coil holder (not shown) is rewound is conveyed from a deflector pinch roll 1 through a support roll 2 in a sheet passing direction s ′. The steel plate s is hot-plated with a CPC (hot-dipping line) 4, measured with a plate thickness meter 5, and then wound up. At this time, the control panel 3 controls the rotation of the deflector pinch roll 1.

  Since the surface of the deflector pinch roll 1 is contaminated with oil adhering to the surface of the steel plate, the surface of the deflector pinch roll 1 is cleaned at an appropriate time or when the operation is interrupted for a long time.

  As described above, the cleaning work is performed by an operator standing on the front of the roll and polishing with a cleaning tool (for example, a cloth soaked with acetone) while rotating the roll. Since the work is performed while standing close to the roll, there is a risk that the hand is accidentally caught in the roll.

  In the present invention, in order to perform a cleaning operation safely, an operator is provided with an area sensor C that detects the tangled object of the roll before the deflector pinch roll 1 and works in front of the deflector pinch roll 1. A mat sensor B that detects the presence of the worker is placed in the work area of the worker b, and a mat sensor A that detects the presence of the worker is placed in the work area of the worker a that operates in front of the control panel 3. The basic idea is to coordinate the operation of the sensor C and the operations of the mat sensors A and B.

  That is, when the operator a who operates the control panel 3 gets on the mat sensor A for operation, the mat sensor A is activated, and when the operator b who cleans the deflector pinch roll 1 gets on the mat sensor B for cleaning. Only when the mat sensor B is activated and both the mat sensors A and B are activated, the area sensor C that detects the entrainment of the tangible object of the deflector pinch roll 1 is activated.

  The area of the mat sensor A and the mat sensor B is preferably the same as each work area.

  Note that when the operator a operates the control panel 3 for the cleaning work, the rotation mode of the deflector pinch roll is switched to the rotation mode for the cleaning work.

  When the area sensor C detects that a tangible object of the deflector pinch roll (for example, a cleaning tool, an operator's arm) is detected, the area sensor C sends a signal to stop the rotation of the deflector pinch roll to the control panel. To ensure the safety of people. Further, when the tangible object crosses the sensor, the area sensor C determines that the tangible object is involved, and sends a signal to stop the rotation of the deflector pinch roll to the control panel to ensure the safety of the operator.

  The area sensor C is not operated while the steel plate is being passed, and when either the worker a or the worker b is detached from the area sensor, the rotation of the deflector pinch roll and the operation of the area sensor are not performed. Try to stop.

  Next, examples of the present invention will be described. The conditions in the examples are one example of conditions used for confirming the feasibility and effects of the present invention, and the present invention is based on this one example of conditions. It is not limited. The present invention can adopt various conditions as long as the object of the present invention is achieved without departing from the gist of the present invention.

(Example)
A mat sensor having a contact life of 1 million times and an operating force of 50 N (5 to 8 kgf) was placed in front of the control panel and the deflector pinch roll, and two workers cleaned the deflector pinch roll. Two workers were able to work together to clean up. During the work, the area sensor was activated several times, but the rotation of the deflector pinch roll immediately stopped, so the operator's danger could be avoided.

  As described above, according to the present invention, the cleaning operation of the deflector pinch roll can be performed safely in cooperation with two workers. Therefore, the present invention has high applicability in the steel industry.

1 Deflector pinch roll 2 Support roll 3 Control panel 4 CPC (hot dipping line)
5 Thickness gauge A, B Mat sensor a, b Worker s Steel plate s' Passing direction

Claims (6)

In the method of cleaning the deflector pinch roll that sends the unwound steel sheet to the production line,
(I1) A mat sensor A for detecting the presence of the worker, which is disposed in a work area of the operator who operates the control panel of the deflector pinch roll, and a work area of the worker who cleans the deflector pinch roll, Both mat sensors B that detect the presence of the worker are activated,
(I2) The area sensor C, which is provided in front of the deflector pinch roll and detects the entrainment of a tangible object of the roll, operates.
(Ii) A safe cleaning method for a deflector pinch roll, wherein when the area sensor C detects the inclusion of a tangible object of the deflector pinch roll, a signal for stopping the rotation of the deflector pinch roll is sent to the control panel.   The method of safely cleaning a deflector pinch roll according to claim 1, wherein the mat sensor B is activated after the mat sensor A is activated.   The area of the mat sensor A and the mat sensor B is the same as each work area, The safe cleaning method of the deflector pinch roll according to claim 1 or 2. In the deflector pinch roll cleaning device that sends the unwound steel sheet to the production line,
(I1) In the work area of the worker who controls the control panel of the deflector pinch roll, lay a mat sensor that detects the presence of the worker,
(I2) A mat sensor that detects the presence of the worker is placed in the work area of the worker who cleans the deflector pinch roll,
(Ii) An area that operates after the operation of the two mat sensors before the deflector pinch roll, detects the entrainment of a tangible object of the roll, and sends a signal to stop the rotation of the deflector pinch roll to the control panel. The sensor was placed
A safety cleaning device for a deflector pinch roll.   The safety cleaning device for a deflector pinch roll according to claim 4, wherein the mat sensor B is activated after the mat sensor A is activated.   6. The method of safely cleaning a deflector pinch roll according to claim 4, wherein the area of the mat sensor A and the mat sensor B is the same as each work area.

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