JPH0335159A - Display device for coiled steel plate - Google Patents

Abstract

PURPOSE:To print information without contacting and to make a display with flexibility at a high speed by deciding the switching of an object of printing by detecting a weld point, calculating the quantity of movement of a steel plate from the switching point of time and determining printing start timing. CONSTITUTION:When the steel plate 18 which is unwound from the coiled steel plate 11 is conveyed and its weld point passes a weld point detector 1, the detector 1 generates a detection signal. Further, a pulse generator 3 counts pulses corresponding to the coil length by utilizing the rotating speed of the roll. A print logic controller 5 calculates the coil length according to those pieces of information by using the output point of time of the detector 1 as counting start timing to calculate a position where the information is to be printed. A printing controller 6 performs processing such as the correction of print information according to pieces of information inputted from an actual- site console panel 7 and a remote console panel 8 and allows a printer 9 to start operating according to a print command from the controller 6. The printer 9 drives its print head 10 according to the print information supplied from a process computer 4 and jets ink dots to the print position of the steel plate 18, thereby printing the information.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a display device for a coil steel plate for displaying product information and various types of user-designated information on the surface of the coil steel plate.

[Prior art] For example, automobile manufacturers use cold-rolled steel sheets as the material for their products.Normally, steel sheets are delivered from manufacturers to users in the form of coiled steel sheets, but with matte products, there are no surface defects. Or it becomes a quality problem. For this reason, in response to user requests, manufacturers mark the areas where flaws occur on the surface of steel sheets during the manufacturing process to indicate flaws before shipping. Instead of this flaw display, or in addition to the flaw display, product information, various types of user-specified information, etc. are also displayed.

Conventionally, as a means for making the above-mentioned markings on a steel plate, a contact type display mechanism such as a rotating roller impregnated with ink or a stamp bar that prints characters or the like on the surface of the steel plate under pressure has been used.

[Problem to be solved by the invention] However, in the conventional display means described above.

Because it is a contact type in which the printing part comes into contact with the steel plate, high-speed display is not possible and wear of the printing part is inevitable. 3! To.

It is necessary to replace the printing part every time the displayed content changes.1
Workability was poor, and it was difficult to handle a wide variety of products and a large amount of information.

An object of the present invention is to provide a coiled steel plate display device that performs non-contact printing and enables high-speed and flexible display.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides identification markings on the surface of a belt-shaped steel plate made by welding a plurality of cold-rolled steel plates in the process of winding it into a coil shape. In the appended display device, a welding point detector detects a welded part of a steel plate being rewound and being conveyed, a steel plate moving speed detecting means detecting a moving speed of the steel plate being conveyed, and a steel plate moving speed detecting means A calculation unit that determines the timing of display start on the steel plate based on the speed detection signal and the detection signal from the welding point detector; and a non-contact display unit that displays pre-specified display content on the surface of the steel plate based on the calculation result of this calculation unit. The apparatus is configured to include a printing means for printing in the state.

[Operation] According to the above means, switching of the printing target is determined by detecting the welding point on the returned steel plate, and further, the amount of movement of the steel plate from the time of switching is calculated from the conveyance speed, and printing is started. Decide on timing.

By printing on the surface of the steel plate according to this timing, it is possible to print specified display contents at a desired position on a desired steel plate in a non-contact manner. Therefore, it is possible to have a structure that does not have parts that wear out, unlike the conventional case, and it is also possible to easily correspond to any specified display content.

[Embodiment] FIG. 1 is a block diagram showing a schematic configuration of an embodiment of the present invention.

First, the configuration of the conveyance line for the steel plate to be displayed will be explained.

The coiled steel plate 11 made by cold rolling is in an undisplayed state, and in consideration of workability, multiple steel plates with different thicknesses, widths, lengths, etc. are welded together in order and rolled. It has been taken. On the conveyance path of this coiled steel plate 11, there are sequentially a priddle roll 12, a steering roll 13, and so on. Pride roll 14. A loop car 15 and a steering roll 16 are provided. Additionally, a shear for cutting the steel plate into a predetermined length is installed on the inlet or outlet side of the line as necessary.

When printing, the coiled steel sheet 11 is unwound, passed through the above-mentioned rolls and devices in sequence, and then wound up again. After exiting the priddle roll 14, the specified content is printed by a printing device, which is one of the components of a later display device. The printing device according to the present invention is of an inkjet type, and is equipped with a plurality of nozzles that eject ink dots, and flies the ink dots onto the surface of a steel plate according to print information, and uses the conveyance of the steel plate as a main scan (or sub scan). , which performs printing using the same principle as an inkjet recording device. In this case, since the printing part is spaced apart from the surface of the steel plate, printing is performed in a non-contact state. Therefore, unlike conventional nozzles, there are no parts that wear out, and since the ink dots fly and stop from the nozzle are controlled to print according to the printed content, they can be replaced according to the printed content, unlike conventional nozzles. It has no part to do.

Although the ink dots adhering to the steel plate 18 are liquid, they are dry and will not cause characters or the like to become illegible or stain.

Next, the configuration of the display device will be explained.

On each entry side of the priddle rolls 12 and 14.

Welding point detectors 1 and 2 for detecting welding positions are provided. Furthermore, a pulse generator 3 is attached to one of the priddle rolls 14 for detecting its rotation speed.

The welding point detector 1 and the welding point detector 2 (reserve equipment used as an alternative when the welding point detector 1 is out of order) are connected to a process computer 4 as a host computer that controls the printing process and the steel plate conveyance process. A plant logic controller (hereinafter referred to as PLO) is connected to this process computer 4.
5 is connected. PLC5 as this lower-level computer
In addition to the detection signals of the welding point detectors 1 and 2, the detection signal of the pulse generator 3 is applied. PLC5
A print control device 6 is connected to the print control device 6, and to this print control device 6 are connected an on-site operation panel 7 installed on the line and a remote operation panel 8 installed in a driver's cab away from the line.

Furthermore, a printing device 9 that drives a print head 10 is connected to the printing control device 6 .

Next, the operation of the display device with the above configuration will be explained.

The process computer 4 stores in advance printing information for the product (steel plate). This printed information is set for each product (for each steel plate classified by welding points), and correspondence with that product is performed based on the detection of welding points by welding point detectors 1 and 2. The printing information includes an instruction as to whether or not to print, board thickness, board width, and one type. In addition to modifying print information, operations such as automatic/manual operation mode selection and use/non-use of the printing device are performed by on-site operation 1117 or remote control 118.

When the steel plate 18 unwound from the coiled steel plate 11 is conveyed sequentially and its welding point passes the welding point detector l, the welding point detector l generates a detection signal.

Further, the pulse generator 3 counts the number of pulses corresponding to the coil length from the roll rotation speed.

Based on this information, the PLC 5 calculates the coil length using the output time of the welding point detection al as the count start timing, further calculates the position to be printed, and sends a printing command to the printing control device 6.

The printing control device 16 includes an on-site operation panel 7 and a remote control 518.
In addition to correcting the printing information according to the information inputted from the printer, the printer 9 executes various corresponding processes, and starts the operation of the printing device 9 based on a printing command from the printing control device 6. The printing device 9 drives the print head 1O according to print information given by the process computer 4 (selected according to the number of times of detection by the welding point detector 1). Due to this drive, ink dots fly from the print head 10 toward the printing position on the steel plate 18, and print information is printed. The printed steel plate 18 is conveyed to the loop car 15 and wound up to become a labeled product 17.

The above printed content is determined by the user's request or the internal regulations of the steel plate manufacturer, and an example thereof is as follows.

[First example: Example of steel sheet manufacturer specifications] NlPP0N
5TEEL O, 8AB where 0.8 is the plate thickness, A
represents the wood type, and B represents the variety.

FIG. 2 is a flowchart showing the tracking process (the process of calculating the print position based on the output of the welding point detector 1 and the pulse generator 3) by the PLC 5 (in the figure, S is an abbreviation that means step). .

This tracking process is performed using a micro counter (a counter that determines the printing location) shown in Fig. 3 and a macro counter (a counter that determines the printing location) shown in Fig. 4. It has two tracking functions: a counter for starting the

First, it is determined whether or not the welding point detector l has detected a welding point (S21), if a welding point has been detected.

Reset macro counter PLI (P +, s = O)
At the same time as (S22), the micro counter PL2 is reset (PLm set 0) (S23), and then the pulses from the pulse generator 3 are counted (S23) (PI(ae>-ΣPL(i)+PL□ =Pi,
t+ct+PLa=PLI5□).

Next, +PL* and P L can * t (=printing interval) are compared and determined (S22), P14≧P Lcon*t
If the condition is not satisfied, the process returns to step S24.

When PL2≧PL con++L, PLI and Ll
Compare and judge ldJ (=print head distance)526)
, if PLI≧L@4j, the print command is sent to the print control device 6.
(S27). The timing for sending this print command is as shown in FIG. Furthermore, it is determined whether the printing is completed (328), and if it is not completed, the process returns to step S22, and if it is completed, the printing operation is ended.

FIG. 5 is a flowchart showing data transmission processing by the print control device 16.

In this embodiment, printed information is transmitted at a distance It x s closer to the installation position of the welding point detector l. For this,
First, it is determined whether the previous xl was equal to the set value (S51), and if they matched.

Process calculation 4m! 4, the data (company name, board thickness, 9 board widths, etc.) is read (S52). When it is determined that this data has been read successfully (S53), the control code is converted ( S54), and further creates a transmission pattern for sending to the print control device 6 (
S SS), the above processing contents are stored in the built-in memory by the CPU built in the PLC5 (S 5
6) When it is determined that this storage process has ended (S57)
, to track changes in the data (558), and after performing block processing of print commands (S59), output processing to the print control device 16 is executed (S60).
, this output process is the point at which the data change point is reached. The reason for blocking the print command is to prevent printing errors due to changes in print data during transmission.When it is determined that 0 or more processes have been completed (S61), the print command is blocked. The process is canceled (S62), and the process returns to step S51.

[Effects of the Invention] As is clear from the above, according to the present invention, there is provided a display device that adds an identification mark to the surface of a belt-shaped steel plate formed by welding a plurality of cold-rolled steel plates in the process of winding it into a coil shape. , a welding point detector for detecting a welded part of a steel plate being rewound and being conveyed; a steel plate moving speed detecting means for detecting a moving speed of the steel plate being conveyed; a speed detection signal from the steel plate moving speed detecting means; a calculation unit that determines the timing to start displaying on the steel plate based on a detection signal from the welding point detector; and a calculation unit that prints pre-designated display content on the surface of the steel plate in a non-contact manner based on the calculation result of the calculation unit. By providing a printing means, it is possible to handle any type of printed information (compatible with a variety of printed information), and there is no need to replace the printed information even if the printed information changes, resulting in high printing This enables display with a high degree of freedom depending on quality. Furthermore, since printing can be performed in a non-contact manner, there is no wear, high-speed printing is possible, a long life is maintained, and maintenance is easy.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a schematic configuration of an embodiment of the present invention, FIG. 2 is a flowchart showing tracking processing by the PLC 5, and FIG. 3 is a part of the tracking processing in FIG. 2.
FIG. 4 is an explanatory diagram showing macro counter processing, which is one of the tracking processes shown in FIG. 2, and FIG. be. In the figure. l: Welding point detector 3: Pulse generator 4: Process computer 5: PLC 6: Printing control device 7: Field operation panel 8: Remote operation panel 9: Printing device 10: Print head 11: Coil steel plate 18: Steel plate

Claims (1)

[Claims] A welding inspection that detects welds on a steel plate that is being rewound and transported using a display device that attaches an identification mark to the surface of a strip of steel plate that is made by welding multiple cold-rolled steel plates that are connected together into a coil during the process of winding it into a coil. a steel plate moving speed detecting means for detecting the moving speed of the steel plate being transported; and a timing for starting displaying the steel plate based on a speed detection signal from the steel plate moving speed detecting means and a detection signal from the welding point detector. 1. A display device for a coiled steel plate, comprising: a calculation unit that determines the calculation result; and a printing unit that prints predetermined display content on the surface of the steel plate in a non-contact manner based on the calculation result of the calculation unit.