JP2018138372A - Wood printing system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable printing of an ink line with high accuracy even when there is vibration and the like during processing by a process machine.SOLUTION: A print machine controller 440 comprises a discharge timing determination means (S450) which receives as input a same signal as a transfer signal output by a sequencer 420 for a servo motor 112 of a positioning transfer unit 110, estimates a transfer condition of a wood ( transfer start, stop, transfer restart) based on the transfer signal, and determines an ink discharge timing (the timing of start, stop and restart of printing).SELECTED DRAWING: Figure 3

Description

  The present invention relates to a wood printing system capable of accurately printing a black line indicating an assembly position when wood is crossed and assembled.

  At present, when building a wooden house, the wood required for it is processed in advance in a pre-cut factory. In that case, if it is a house using the conventional construction method, it is hoped that the precut factory will ship the assembly information such as the ink line that becomes the reference line for the rafters etc. on the feather pattern material etc. Yes. Further, in the case of a house using the 2 × 4 construction method, the precut factory is required to ship it as a panel in an assembled state based on assembly information such as a black line that becomes a reference line in the factory.

  In order to meet these demands, the applicant of the present application can print characters, symbols, and black lines on wood, and also reduce the time required for the entire process by printing when transported to the processing position by the processing machine. The apparatus which does is proposed (patent document 1). The apparatus proposed in Patent Document 1 directly inputs an encoder signal attached to an end of a drive shaft of a workpiece transfer positioning moving body to a printing press controller, and detects the movement and stop of wood by the printing press controller. By performing printing, a black line can be written at an accurate position even while the material is transported at a relatively high speed.

JP 2008-194895 A (0038, 0059 to 0062, 0077)

  Here, since the products to be processed differ from one house to another, the shape, product length, and ink mark printing position are various, and the wood to be processed by the pre-cut processing equipment is large. If done, it is accompanied by large vibrations. For this reason, even in the apparatus described in Patent Document 1, if a large vibration occurs during the printing start or during printing due to the influence of processing on the wood or the like, the encoder signal is disturbed by the influence, and the black line is generated. May be printed at the wrong position.

  In view of this, an object of the present application is to provide a wood printing system capable of printing a black line with high accuracy even when there is vibration during processing by a processing machine.

The printing system of the present invention made to achieve the above object includes a transfer positioning body that transfers wood in a transfer direction and positions it at a positioning position such as a processing position or a printing position, and a wood. A wood printing system including a wood processing device including a printing device that prints an image includes the following configuration.
(1-1) When the transfer signal corresponding to the transfer amount is input, the transfer positioning body includes a drive device that generates a drive force for transferring the wood in the transfer direction by the transfer amount. Being.
(1-2) Provide a command device that outputs a transfer signal for executing transfer / stop of wood to the drive device.
(1-3) A transfer signal output from the command device is also input to the printing device, and the printing device receives the transfer start signal, the start timing, the stop timing, and the restart timing. Discharge timing determining means for determining based on the feed amount estimated from the above.

  According to the printing system of the present invention, since the transfer positioning body and the printing apparatus operate based on the transfer signal, even if the transfer signal changes due to disturbance such as vibration, the change follows each other. Positioning position errors can be reduced. In addition, since the transfer signal is a signal for driving instructions and is close to the signal generation source, it is less affected by disturbances such as vibration than the case where the actual wood transfer amount is detected using a sensor or the like. is there. Therefore, the black line can be printed with high accuracy even when there is vibration during processing.

  According to the present invention, black lines can be printed with high accuracy even when there are vibrations or the like during processing by a processing machine.

It is a schematic diagram of a feather material processing machine of an embodiment. It is a block diagram which shows the control system of embodiment. It is a flowchart of control in an embodiment.

  Below, the Example of the feathers material processing machine to which this invention is applied is described.

  Hereinafter, in the feather material processing machine as an embodiment, a description will be given of an example of a printing system capable of accurately printing a black line at an accurate position. First, the configuration as a mechanical device will be described. As shown in FIG. 1, the feather material processing machine 1 includes an input conveyor 100, a processing machine main body 200, and a take-out conveyor 300.

  The input conveyor 100 is provided with a positioning transfer body 110 that can move in the longitudinal direction of the workpiece. In addition, the front end of the positioning transfer body 110 presses the rear end of the workpiece, and the workpiece is transferred and positioned by moving toward the take-out conveyor 300. The positioning transfer body 110 is provided with a servo motor 112 for driving in the left-right direction. The servo motor 112 drives and controls the transfer positioning of the positioning transfer body 110. This movement amount of the positioning transfer body 110 in the transfer direction corresponds to the movement amount of the workpiece in the transfer direction. The servo motor 112 has a built-in encoder.

  The printing device 120 is installed on the input conveyor side of the processing machine main body 200, and the sensor 113 is installed in the immediate vicinity of the right side of the printing device 120. The sensor 113 detects the leading end of the workpiece 300 that has been transferred by the positioning transfer body 110 and sends the signal to the sequencer.

  The feather material processing machine 1 according to the present embodiment has the above-described configuration, so that the printing apparatus 120 is driven while the workpiece is taken out by the positioning transfer body 110 and is transferred toward the conveyor 300. Printing on the work material and filling in the black line can be executed. The positioning transfer body 110 is also configured to execute transfer positioning for the cutting process by the circular saw 210.

  Next, the structure of the control system of the feather material processing machine 1 of this embodiment is demonstrated. As shown in FIG. 2, the control system of this embodiment includes a control computer 410, a sequencer 420, a processing machine 430, and a printing machine controller 440.

  The control computer 410 transmits processing data for processing to the sequencer 420, and transmits print data for printing characters / symbols and black lines to the printer controller 440. Further, a processing command is issued from the sequencer 420 to the processing machine 430 based on the processing data. Further, when a processing command is issued from the sequencer 420 to the processing machine 430, a drive instruction command is issued from the sequencer 420 to the servo motor 112, and input of the workpiece is started. The sensor 113 detects the leading end of the input work material on the take-out conveyor 300 side, and a signal is sent to the sequencer 420.

  The sequencer 420 outputs a print permission signal to the printer controller 440 when a material detection signal is input from the sensor 113. Simultaneously with the output of the print permission signal, a transfer signal corresponding to a drive command for setting the feed amount per pulse to 0.3 mm, for example, is output from the sequencer 420 to the servo motor 112 and the printer controller 440. When the sequencer 420 stops the wood at the machining position in the middle of feeding, the sequencer 420 outputs a transfer signal for feeding to the machining position and a transfer signal for feeding resumed after the machining is finished.

  The servo motor 112 executes the transfer, stop, and transfer restart of wood by the positioning transfer body 110 according to the transfer signal input from the sequencer 420. At this time, the servo motor 112 refers to the detection signal from the built-in encoder 450, moves the positioning transfer body 110 by a pulse corresponding to the transfer signal from the sequencer 420, stops, and a transfer signal for subsequent feeding is received. When input, control is performed such that the positioning transfer body 110 is moved by the pulse corresponding to the transfer signal.

  When printing data from the control computer 410 is input, the printing machine controller 440 expands the printing data into printing machine drive data for controlling the printing head at an ink discharge timing in consideration of the feeding speed by the positioning transfer body 110. The printing press controller 440 starts printing control based on printing press drive data when a print permission signal is input from the sequencer 420. At this time, the printing machine controller 440 controls the drive of the print head at the ink discharge timing in consideration of the feed speed based on the transfer signal input from the sequencer 420. In this print head drive control, the printer controller 440 estimates the transfer amount corresponding to the transfer signal, and determines the execution timing of drive control such as discharge, discharge stop, and discharge restart of the print head. More specifically, after starting the ink discharge based on the transfer signal, the printing machine controller 440 does not discharge the ink while the wood is stopped at the processing position, and the transfer signal corresponding to the restart of the transfer. Executes print head drive control while estimating wood transfer / stop / transfer restart based on the transfer signal, such as restarting ink discharge when wood transfer is resumed from the processing position again. To do.

  Next, the contents of the control process will be described. As shown in FIG. 3A, the control computer 410 transmits the processing data to the sequencer 420 and the printing data to the printer controller 440 (S110). When the machining completion signal is input from the sequencer 420 (S120: YES), the control computer 410 determines the presence or absence of the next workpiece (S130). If there is a next workpiece, the control computer 410 returns to S110 (S130: YES). If there is no next workpiece (S130: NO), the control computer 410 ends the process.

  As shown in FIG. 3B, the sequencer 420 receives the machining data from the control computer 410 (S210: YES), and drives the servo motor 112 to start transferring the workpiece toward the machine body 200 ( S220). When the tip detection signal from the sensor 113 is input to the sequencer 420 (S230: YES), a print permission signal is output to the printer controller 440 (S240), and a transfer signal is sent to the servo motor 112. Output (S250). The transport signal is a signal for continuously feeding wood by a predetermined feed amount, and is also input to the printing machine controller 440. The servo motor 112 returns a completion signal to the sequencer 420 when the transfer of the feed amount corresponding to the transfer signal is completed. In response to the arrival of the transfer completion signal, the sequencer 420 determines whether or not the machining corresponding to the currently received machining data has been completed (S260). Then, while the machining is not completed (S260: NO), it is determined whether or not it is the timing for resuming the transfer by the next continuous feed (S270). When the timing for resuming the transfer is reached (S270: YES), A transfer signal for continuous feed is output (S280). This transfer signal is also input to the printer controller 440. Note that the sequencer 420 performs operations such as clamping, cutting, and unclamping with respect to the processing machine body 200 while the next transfer signal is output in S280 after the feeding corresponding to the transfer signal output in S250 is completed. When processing is performed on wood and the processing is completed and the transfer of the wood is completed (S260: YES), a processing completion signal is output to the control computer 410 and the processing is ended (S300).

  As shown in FIG. 3C, when the printing machine controller 440 receives printing data from the control computer (S410: YES), the printing machine controller 440 develops the printing data into printing machine drive data (S420). Then, it waits for a print permission signal to be input from the sequencer 420 (S430). When the print permission signal is input (S430: YES) and the transfer signal is input (S440: YES), the wood transfer state is estimated from the transfer signal, and the ink discharge timing by the print head is determined based on the printer drive data. Determine (S450). Then, control for driving the print head is executed when the determined ejection timing is reached (S460, S470). Here, the transfer state is estimated by a calculation based on the feed amount determined by the transfer signal and the feed speed (0.3 mm per pulse) by the servo motor 112. Further, the ink ejection timing is determined by calculation from the image information based on the printer drive data and the transfer status. In addition, when the estimated result of the current transfer state is a feed amount up to the middle of the image information to be continuously drawn, it is determined to be the ink discharge timing to the middle of the image to be drawn continuously. Is done. In such a case, the determination of whether or not printing is complete is “NO”, and when the drive control up to the ink discharge timing determined in S450 is completed, the ink discharge is interrupted and the next transfer signal is input. (S480 → S440). When the next transfer signal is input (S440: YES), the processing from S450 is executed. In this way, when the transfer is interrupted, the image to be continuously drawn is interrupted and is drawn halfway, and the transfer is resumed and the continuation is drawn at the same time. Thus, the printing press drive data generated in S420 is printed according to the wood transfer status estimated based on the input transfer signal, and when printing based on the printing press drive data is completed (S460: YES), This process ends.

  Since it is configured as described above, according to the present embodiment, vibration of the entire machine during processing, vibration of the transfer device due to backlash between gears during transfer, vibration of the transfer device when transfer is interrupted or resumed, etc. Even if this occurs, the black line can be accurately printed at an accurate position without affecting the control of the discharge timing of the printer controller 440.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and can be implemented in various modes without departing from the scope of the invention.

  For example, the present invention can of course be applied not only to the feather material processing machine but also to various precut processing apparatuses. Further, the signal line to the servo motor 112 may be branched instead of directly from the sequencer 420, or a transfer signal may be input to the printing press controller 440 via the controller of the servo motor 112.

  It can be used in a wood precut factory for wooden houses.

DESCRIPTION OF SYMBOLS 1 ... Feather pattern material processing machine 100 ... Input conveyor 110 ... Positioning transfer body 112 ... Servo motor 113 ... Sensor 120 ... Printing device 200 ... Processing machine main body 210 ... Circular saw 300 ... take-out conveyor 410 ... control computer 420 ... sequencer 430 ... processing machine 440 ... printer controller 450 ... built-in encoder

Claims (1)

A transport positioning body that transports wood in the transport direction and positions it at a positioning position that is an arbitrary position such as a processing position or a printing position, and a wood processing apparatus that includes a printing device that prints an image on the wood. A wood printing system comprising the following configuration in a wood printing system.
(1-1) When the transfer signal corresponding to the transfer amount is input, the transfer positioning body includes a drive device that generates a drive force for transferring the wood in the transfer direction by the transfer amount. Being.
(1-2) Provide a command device that outputs a transfer signal for executing transfer / stop of wood to the drive device.
(1-3) It is configured such that a transfer signal output from the command device is also input to the printing device, and the printing device is supplied with the start / stop / restart timing of printing. Discharge timing determining means for determining based on the feed amount estimated from the signal is provided.