JP2017088365A - Conveyance device, drying device, image formation system, conveyance method and conveyance program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform processing for applying a tension to a sheet properly even when there is a device performing conveyance on the upstream side in an apparatus performing prescribed processing to a continuous sheet.SOLUTION: A conveyance device includes: a dancer roller as a movable roller which is movable in a preset direction; a cooling roller; a lifting motor which moves the movable roller in the preset direction; and a microcomputer part which controls conveyance of a continuous sheet with the plurality of rollers including the movable roller. In the state where the movable roller conveys the continuous sheet and the lifting motor moves the movable roller in the preset direction, when the movable roller stops movement in the preset direction without reaching the preset position, the lifting motor continues output of the driving force in the preset direction, when the microcomputer part performs conveyance at the slower speed than the normal conveyance speed after stopping, the movable roller moves in the preset direction following conveyance at the slower speed.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a transport device, a drying device, an image forming system, a transport method, and a transport program.

  2. Description of the Related Art Conventionally, an apparatus that performs printing on continuous paper is known. In such an apparatus, it is known to convey a sheet with tension. For example, in Japanese Patent Laid-Open No. 2015-120268 (Patent Document 1), speed control is performed so that the buffer member is raised from the control line during deceleration when the conveyance is stopped, and the buffer member is lowered when the conveyance is stopped during printing. However, it is described that paper slack is removed.

  The technique described in Patent Document 1 is to adjust the tension of the sheet when stopped by an apparatus upstream from the printing apparatus. However, when there is an apparatus that conveys the sheet upstream, there is a shortage of sheets when passing the sheet. Thus, the problem that the roller could not be lowered to the target position could not be solved. This problem applies not only to continuous paper but also to continuous conveyed objects.

  Therefore, the problem to be solved by the present invention is to perform a process of appropriately applying tension to the object to be conveyed even when there is an apparatus for conveying on the upstream side in an apparatus that performs a predetermined process on continuous objects to be conveyed. Is to be able to.

  In order to solve the above problems, an embodiment of the present invention includes a movable roller that is movable in a preset direction, a moving motor that moves the movable roller in the preset direction, and a plurality of rollers including the movable roller. A transfer control unit that controls the transfer of the continuous object to be conveyed at the position, and the movable roller conveys the continuous object to be conveyed, and the moving motor moves the movable roller in the preset direction. In the state where the movable roller cannot reach the preset position and stops moving in the preset direction, the moving motor continues to output the driving force in the preset direction, After the stop, when the transport control unit transports at a speed slower than the normal transport speed, the movable roller moves in the preset direction along with the transport at the slow speed. Apparatus characterized.

  According to the present invention, in an apparatus that performs a predetermined process on a continuous object to be conveyed, even when there is an apparatus that conveys upstream, it is possible to appropriately perform a process of applying tension to the object to be conveyed. Problems, configurations, and effects other than those described above will become apparent from the following description of embodiments.

It is a figure which shows the structure of the printing conveyance line which concerns on embodiment of this invention. It is a figure which shows the internal mechanical structure of the post-drying apparatus of the printing conveyance line shown in FIG. It is a block diagram which shows the control structure of the post-drying apparatus shown in FIG. It is a flowchart which shows the control procedure of the post-drying apparatus shown in FIG.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram illustrating a configuration of a print conveyance line according to an embodiment of the present invention. In this embodiment, duplex printing is performed using two inkjet printers on a roll paper.

  In FIG. 1, a printing conveyance line 1 according to the present embodiment includes a pretreatment device 2, a pre-coating device 3, a front surface printing machine (inkjet printer) 4, a turn bar 5, a back surface printing machine (from the upstream side in the conveyance direction of the roll paper 10. An ink jet printer) 6, a post-drying device 7, and a post-processing device 8. The roll paper 10 which is continuous paper is pulled out from the first roll 10a by the pre-processing device 2, and taken up by the post-processing device 8 through the print conveyance line 1, thereby forming the second roll 10b.

  In the printing conveyance line 1 schematically configured as described above, when normal double-sided printing is performed on a long print medium represented by the roll paper 10, first, the first roll is processed by the preprocessing device 2. The pre-coating device 3 applies the pre-coating liquid to both the front and back surfaces of the roll paper 10 on the roll paper 10 unwound. Next, an image is printed on the surface of the roll paper 10 by the front surface printing machine 4, and further, an image is printed on the back surface of the roll paper 10 by the back surface printing machine 6 sandwiching the turn bar 5. The roll paper 10 on which images are printed on both sides then enters the post-drying device 7 and is subjected to a heat drying process on both sides printed. The roll paper 10 that has been subjected to the heat-drying process is wound up by the post-processing device 8. Instead of winding, it may be configured to cut and stack to a predetermined size. In the present embodiment, the front surface printing machine 4 and the back surface printing machine 6 are each composed of an ink jet printer. Accordingly, the print conveyance line 1 constitutes an image forming system by the conveyance device constituting the post-drying device 7 and the back surface printing machine 6 installed upstream thereof.

  In the printing conveyance line 1, in addition to normal printing conveyance, paper conveyance called inching can be performed. Inching is performed when paper is passed to the devices before and after the ink jet printer (the pre-processing device 2, the pre-coating device 3, the post-drying device 7, and the post-processing device 8) on the transport line or when the paper is replaced. This is a low-speed paper conveyance. In normal paper conveyance, in order to prevent the occurrence of paper meandering and jamming, it is necessary to convey the paper between the back surface printing machine 6 and the post-drying device 7 while maintaining tension. Even in a slack state where no tension is applied to the paper, the paper can be conveyed at a low speed.

  For example, the sheet between the back surface printing machine 6 and the post-drying device 7 is broken, and the amount of paper coming out from the exit of the back surface printing machine 6 is desired to pass through the post-drying device 7 and the post-processing device 8. If it is short, inching conveyance is carried out, the paper is temporarily stored near the exit of the back surface printing machine 6, and then returned to the printable state by passing through the post-drying device 7 and the post-processing device 8.

  FIG. 2 is a diagram illustrating the internal mechanical configuration of the post-drying apparatus.

 The post-drying device 7 mainly includes a dancer roller unit 73, a heating roller unit 71, a conveying roller unit 72, and a heating roller unit 71 from the upstream side in the sheet passing direction of the roll paper 10.

  The heating roller unit 71 includes six heating rollers 711 arranged in a staggered manner, and a heater lamp that is a heat source and a thermistor and a thermopile that are temperature measuring units are installed therein. The temperature of the heater lamp is controlled to a temperature necessary for drying the paper while the roll paper 10 is being conveyed. On the paper path in the post-drying device 7, the roll paper 10 comes into contact with the heating roller 711 and is conveyed. In this process, both sides of the paper are subjected to heat drying.

  For temperature control of the heater lamp during printing preparation or printing, a thermopile that performs temperature detection without contact with the heating roller 711 and a thermist that performs temperature detection by contact with the heating roller 711 are used. The contact-type thermistor detects the temperature of the heating roller 711 together with the thermopile when heating of the heater lamp is started during printing preparation (before paper conveyance). When the heating to the target temperature is completed, a verification check is performed. The verification check is to check that the detected temperature of the thermopile and the thermistor is the same when heating is completed to the target temperature, and to confirm that the detected temperature is correct.

  Further, when the thermistor is transported in a state where it is in contact with the heating roller 711, there is a possibility that the contact portion is worn by the rotation of the heating roller 711. For this reason, the thermistor is configured to be able to control contact / non-contact with the heating roller 711. The thermistor is controlled so as to come into contact with the heating roller 711 only at a timing when the verification check is performed while the sheet conveyance is stopped.

  The conveyance roller 724 of the conveyance roller unit 72 is driven by a conveyance motor 726 (FIG. 3). Further, by applying the brake 727 (FIG. 3), it can be fixed without being driven to rotate. The roll paper 10 is pressed against the conveyance roller 724 by the nip roller, and the roll paper 10 in the post-drying device 7 is conveyed by rotating the conveyance roller 724. Further, the speed control of the transport roller 724 is performed based on the speed data of the paper transport speed obtained from the ink jet printer and the height information of the dancer rollers 731 and 732 as the movable rollers.

  The dancer roller unit 73 includes a plurality of dancer rollers 731 and 732 that are movable up and down by a lifting motor 736 (FIG. 3) as a moving motor. The elevating motor 736 is connected via a one-way clutch, and transmits 100% of the driving force of the motor in the direction in which the dancer rollers 731 and 732 are raised, but transmits only a certain driving force in the direction in which it is lowered. For this reason, when the dancer rollers 731 and 732 are lowered while the roll paper 10 is stretched, the dancer rollers 731 and 732 that are controlled to move down act so that the paper falls, and give tension to the paper. During the conveyance of the paper, the dancer rollers 731 and 732 are continuously driven in the downward direction, and tension is applied to the roll paper 10 between the post-drying device 7 and the back surface printing machine 6, and the back surface printing device (inkjet printer). ) Absorbs the difference between the paper transport speed of 6 and the paper transport speed of the transport roller 724.

  In addition, an encoder for detecting the height of the dancer rollers 731 and 732 is attached to the position detection sensor unit 737, and the position information of the dancer rollers 731 and 732 and the state where the tension is applied against the roll paper 10 are applied. It is possible to grasp. During the conveyance of the roll paper 10, the conveyance roller 724 is speed controlled so as to keep the dancer rollers 731 and 732 at a certain height. Further, when the paper is passed through the post-drying device 7, the dancer rollers 731 and 732 are raised to the highest height (upper limit) so that the operator can easily perform the paper passing operation.

  A cooling fan is attached to the cooling roller portion 74 below the cooling rollers 741, 742, 743, and 744. The cooling fan is rotated during the conveyance of the paper, the wind is sent to the roll paper 10 being conveyed through the cooling roller portion 74, and the high temperature roll paper 10 is cooled through the conveyance roller portion 72. The cooling rollers 741 to 744 are movable rollers having a lift motor 746, a one-way clutch, and an encoder similar to the dancer rollers 731 and 732, and can be driven up and down by grasping the position. Therefore, the lifting motor 746 functions as a moving motor. Similarly to the dancer rollers 731 and 732, the driving force of the elevating motor 746 (FIG. 3) is transmitted only at a constant level in the lowering operation. Therefore, when the cooling rollers 741 to 744 are lowered while the roll paper 10 is stretched, the rolls It acts so as to hang down the paper 10 and stops.

  When cooling the roll paper 10 being conveyed, in order to widen the contact surface of the roll paper 10 with respect to the air blown by the cooling fan, the cooling rollers 741 to 744 are driven in the downward direction and set at a fixed position during conveyance. . In the fixed position, it is fixed so as not to move by the lock mechanism. When passing the paper for the first time with no paper in the post-drying device 7, the cooling rollers 741 to 744 are raised to the highest height (upper limit) in the same manner as the dancer rollers 731 and 732, Set it so that it is easy for the operator to pass the paper.

  In order to set a state in which there is no paper in the post-drying device 7 to a state where the paper (roll paper 10) can be fed and printed and conveyed, the operator performs the following procedure.

  1. A loading preparation operation is executed from the operation panel unit 76. In the loading preparation operation, the dancer rollers 731 and 732 and the cooling rollers 741 to 744 are raised to a position for passing the paper into the post-drying device 7 (upper limit position).

  2. Inching conveyance is carried out, and roll paper 10 for passing paper is accumulated between the back surface printing machine (inkjet printer) 6 and the post-drying device 7.

  3. From the entrance of the post-drying device 7 to the exit, the accumulated roll paper 10 is passed. The roll paper 10 coming out from the outlet of the post-drying device 7 is connected to the roll paper 10 at the entrance of the post-processing device 8.

  4. A loading execution operation is executed from the operation panel unit 76 (FIG. 3). In the loading execution operation, the cooling rollers 741 to 744 are lowered and set at a fixed position during conveyance.

  5. A print preparation operation (START operation) is executed from the operation panel unit 76. In the print preparation operation, the heating roller 711 is heated to the standby control temperature before printing, and after the heating is completed, a verify check is performed to confirm that the detected temperature of the thermopile is satisfactory. When the control of the heating roller 711 is completed, the dancer rollers 731 and 732 start to descend, the dancer rollers 731 and 732 come into contact with the paper in the controller area, and are set while being stopped while applying tension to the paper with the one-way clutch. To do. If the roll paper 10 is slack and the tension is not applied even when the dancer rollers 731 and 732 are lowered below the control line, the transport roller 724 is rotated to transport the excess roll paper 10 in the downward direction. Pull up the driving dancer rollers 731 and 732 to the control line.

  When the dancer rollers 731 and 732 or the cooling rollers 741 to 744 are lowered by the operations 4 and 5 described above, the length of the conveyance path through which the roll paper 10 in the post-drying apparatus 7 is conveyed becomes the dancer rollers 731 and 732 or It changes in a direction increasing as the cooling rollers 741 to 744 descend. As a result, when the roll paper 10 collected by inching is short and the roll paper 10 is not long enough for the increase of the conveyance path that increases as the dancer roller 731 and the cooling rollers 741 to 744 descend, The roll paper 10 is stretched between the printing machine (inkjet printer) 6 and the post-drying device 7, and the dancer rollers 731 and 732 or the cooling rollers 741 to 744 cannot be lowered to the target position, and the error stops. End up.

  In this state, the operator cancels the generated error and performs inching again, stores the roll paper 10 in front of the post-drying device 7, and repeats the operations 4 and 5 again. This operation needs to be repeated every time an error occurs due to insufficient roll paper 10.

  However, the method of canceling the error and repeating the inching and the paper passing execution operation increases the operation amount and operation time of the operator. Moreover, since the state that the dancer rollers 731 and 732 and the cooling rollers 741 to 744 are being lowered cannot be visually confirmed from the outside of the post-drying device 7, the operator can determine how much is left to complete the sheet passing operation. It is not possible to directly grasp whether the required amount of paper is required.

  Further, in order not to repeat the error and repeat the inching and sheet passing operation, if a large amount of the roll paper 10 is to be stored at once, the large amount of roll paper 10 is placed before the post-drying device 7. It is necessary to perform the above operations 1 to 5 from the accumulated state. However, if a large amount of roll paper 10 is stacked and stored between the back surface printing apparatus (inkjet printer) 6 and the post-drying apparatus 7, the roll paper 10 may be folded and creased or bent. . Further, since the roll paper 10 is pulled in a state where there is no tension, if the roll paper 10 is accumulated in a large amount, when the cooling rollers 741 to 744 or the dancer rollers 731 and 732 descend while pulling the roll paper 10, external drying is performed. The transport of the roll paper 10 in the apparatus is not stable, and troubles such as skew and jam are likely to occur.

  Further, when a large amount of heavy roll paper 10 such as cardboard is stacked, the pulling force of the roll paper 10 when the dancer rollers 731 and 722 or the cooling rollers 741 to 744 descend is weak. The roll paper 10 may not be lowered, but may be in contact with the roll paper 10, and an error may be erroneously detected when the roll paper 10 is insufficient and the dancer rollers 731 and 732 and the cooling rollers 741 to 744 cannot be lowered.

  In the printing preparation operation 5 described above, it is necessary to move the dancer roller and the cooling roller after the temperature control of the heating roller 711 is completed in order to prevent the thermistor performing the verification check from being worn. For this reason, even if the heating roller 711 is heated up to the standby control temperature, if the roll paper 10 is insufficient and the process is started again, the process starts again from the heating, and extra time is required.

  Furthermore, in the case of the post-drying device 7 which receives only speed data from the back surface printing device (inkjet printer) 6 and starts the conveyance control, the roll paper 10 actually starts to be conveyed from the standby state before the printing conveyance. By this time, since it is not possible to secure a preparation time for heating the heating roller 711, it is necessary to preheat to a temperature similar to the control temperature during printing conveyance in a standby stage before printing. For this reason, the temperature to be heated in the print preparation operation becomes as high as that during printing conveyance, and the heating time becomes longer.

Therefore, in the present embodiment, when the roll paper 10 is not passed, the paper is passed to the drying device 7 and the loading execution operation or the print preparation operation is performed to set the transportable state.
1) The amount of paper necessary for the dancer rollers 731 and 732 and the cooling rollers 741 to 744 to descend to their target positions cannot be visually confirmed.
2) When the roll paper 10 accumulated in front of the post-drying device 7 is too small, the operator needs to retry by repeating the error cancellation and inching, and the operation amount increases.
3) When too much roll paper 10 is collected in front of the post-drying device 7, the roll paper 10 is too heavy to allow the dancer rollers 731 and 732 and the cooling rollers 741 to 744 to pull the roll paper 10. An error is detected when there is not enough.
4) When the roll paper 10 collected in a large amount in front of the post-drying device 7 is pulled in, skew or jam occurs.
5) When the verify check is performed with the heating roller 711 during the print preparation operation, it takes time to increase the temperature when the heating roller 711 is heated close to the control temperature during conveyance.
It was configured to eliminate such problems.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 3 is a block diagram showing a control configuration of the post-drying apparatus according to the embodiment of the present invention. The reference numerals correspond to the mechanical configuration of FIG.

  In FIG. 3, the post-drying apparatus 7 includes a microcomputer unit 75 for controlling the device, an operation panel unit 76 operated by the operator, a transport roller unit 72 (transport roller 724) or dancer roller unit 73 (dancer rollers 731 and 732), cooling. Each device and sensor of the roller unit 74 (cooling rollers 741 to 744) and the heating roller 711 are connected via a bus 755 via an I / O interface.

  The microcomputer unit 75 that functions as a conveyance control unit instructs the control of each device unit of the post-drying apparatus 7 and performs a calculation necessary for the control, a ROM 751 that stores a program executed by the CPU 750, and a calculation The RAM 752 temporarily stores the result.

  The operation panel unit 76 has an LCD (Liquid Crystal Display) 760 for displaying information such as the state of the post-drying device 7, the menu item being operated by the operator, the set temperature of the heating roller, and the state of the post-drying device 7. The pattern of lighting or flashing changes, and is configured by an LED (Light Emitted Diode) 761 that notifies the operator of the state of the post-drying device 7 and a switch 762 for the operator to operate the post-drying device 7.

  The post-drying device 7 and the back surface printing machine (inkjet printer) 6 are connected by an I / F cable. When the paper is conveyed by printing, information on the conveyance speed of the roll paper 10 is transmitted from the back surface printing machine (inkjet printer) 6. It is transmitted to the post-drying device 7 via the I / F cable. The transport speed information is converted into speed data in the form used for controlling the transport motor 726 of the transport roller 724 by the transport speed receiving unit 705 and used for speed control of the transport roller 724.

  Further, during printing conveyance, the heater lamp 716 of the heating roller 711 causes the heating roller 711 to reach the target drying temperature based on the temperature information of the heating roller 711 detected by the thermistor, thermopile, etc. of the temperature detection sensor unit 717. Controlled.

  In addition, the dancer rollers 731 and 732 are driven in a direction in which the elevating motor 736 is lowered, and the dancer rollers 731 and 732 act so as to hang down the roll paper 10 being conveyed, thereby applying tension. Control. Based on the position information of the dancer rollers 731 and 732 detected by the position detection sensor unit 737 such as a position sensor or an encoder, the conveyance roller 724 is configured so that the dancer rollers 731 and 732 always maintain the control line position during paper conveyance. Speed control is carried out with respect to the driving speed.

  In addition, when the paper is passed through the post-drying device 7, the dancer rollers 731, 732 drive the lift motor 736 based on the position information of the dancer rollers 731, 732 detected by the position detection sensor unit 737 and dancer rollers 731, 732. To the upper limit position.

  Similarly to the dancer rollers 731 and 732, the cooling rollers 741 to 744 are also based on the position information of the cooling rollers 741 to 744 detected by the position detection sensor unit 747 such as a position sensor and an encoder, and the cooling rollers 741 to 744 are passed during paper feeding. Is moved to the upper limit position, and after passing the paper, the elevating motor 746 is driven to set the cooling rollers 741 to 744 to the fixed position where the cooling rollers 741 to 744 are being conveyed.

  FIG. 4 is a flowchart showing a control procedure of the post-drying apparatus 7 shown in FIG.

  In this procedure, the operator first sets the dancer rollers 731 and 732 and the cooling rollers 741 to 744 of the post-drying device 7 to the upper limit position, and causes the roll paper 10 to pass through the post-drying device 7. In order to set the state in which printing can be transported from the state immediately after passing the paper, the heating roller 711 is controlled while waiting for printing while confirming that the temperature detected by the thermistor and the thermopile of the heating roller 711 is correct. Heat to temperature. Then, the cooling rollers 741 to 744 are lowered and fixed to the fixing position during conveyance, the dancer rollers 731 and 732 are lowered to the control line during conveyance, and tension is applied to the roll paper 10. There is a need to. FIG. 4 shows a series of control procedures until the print conveyance is set to a possible state.

  In the figure, when the operator starts the print preparation operation from the operation panel unit 76, the thermistor is brought into contact with the heating roller 711 and heating of the heating roller 711 is started (step S1). At this time, the target temperature of the heating roller 711 is set to a temperature that is lower than the control temperature during standby for printing and at which the verification check can be performed.

  In the verification check, the difference in temperature detected between the thermopile and the thermistor when the temperature of the heating roller 711 changes is observed. Therefore, if the temperature change of the heating roller 711 is small, the temperature difference detected between the thermopile and the thermistor cannot be correctly checked. However, if the heating is performed up to the control temperature during the standby state, it takes time to complete the heating of the heating roller 711. Therefore, the heating roller 711 is once raised to a temperature at which the verification check can be performed, and the verification check is performed (step S2).

  After the verification check is completed, the operation of the dancer rollers 731 and 732 and the cooling rollers 741 to 744 is performed, and the heating roller 711 is raised to the original control temperature in parallel. The temperature at which the verification check can be performed varies depending on the characteristics and configuration of the thermistor and the thermopile. For example, the detection temperature difference between the thermistor and the thermopile is determined to be a normal value in the range up to ± 20 ° C. In this case, the heating roller 711 is heated up to 50 ° C. and a verification check is performed, so that heating is performed at a temperature equal to or higher than a detection temperature difference that is a determination criterion from the detection temperature before heating, and a normal value / abnormal value is sufficiently determined. It is desirable that the temperature be such that

  In step S2, the heating roller 711 is heated and a verification check is performed. When it is confirmed by the verify check that there is no problem with the detected temperature, the thermistor is separated from the heating roller 711 and heated to the target control temperature during standby for printing. When the separation of the thermistor from the heating roller 711 is completed and the roll paper 10 can move on the heating roller 711, the operation of lowering the cooling rollers 741 to 744 from the upper limit position to the fixed position during conveyance is started (step) S3). The cooling rollers 741 to 744 descend while pulling the roll paper 10 being passed.

  Next, while the cooling rollers 741 to 744 are being lowered, whether or not the cooling rollers 741 to 744 have been lowered to the fixed position during paper conveyance is checked by looking at the value of the cooling roller encoder of the position detection sensor unit 747 (step S4). . If it is determined in this check that the cooling rollers 741 to 744 have been lowered to the fixed position during paper conveyance (step S4: No), the cooling rollers 741 to 744 are stopped and fixed to the fixed position. Then, the lowering operation of the dancer rollers 731 and 732 is started (step S5). The dancer rollers 731 and 832 also descend while pulling the roll paper 10 in the same manner as the cooling rollers 741 to 744.

  After that, when the dancer rollers 731 and 732 are lowered to the lower limit or lowered to a position below the height of the control line being conveyed (step S6: No), when the dancer rollers hit the roll paper 10, the dancer rollers are moved up and down. The motor continues to operate in the downward direction, but the roll paper 10 hits the lower limit and is stopped by the one-way clutch. When the conveying roller 724 is driven in this state and the rolled paper 10 in a stretched state is conveyed, the dancer rollers 731 and 732 can be pulled up. In order to raise the dancer rollers 731 and 832 to the control line, the rotation of the conveying roller 724 is started. When the transport roller 724 transports the roll paper 10 in the post-drying device 7, the roll paper 10 is not loosened and stretched, and the dancer rollers 731 and 732 are pulled up as the transport roller 724 transports the paper. It will be.

  The encoder detection position of the position detection sensor unit 737 of the dancer rollers 731 and 732 pulled up is checked (step S8). When the dancer rollers 731 and 732 are raised to the height of the control line being conveyed (step S8: No), the conveyance roller 724 is stopped (step S9). When the transport roller 724 stops, the dancer rollers 731 and 732 are moving in the downward direction at the position of the control line, and are in a stopped state while abutting against the roll paper 10 and applying tension.

  After step S2, the heating roller 711 is heated until reaching the control temperature during printing standby, but the dancer rollers 731 and 732 are in the control line. Therefore, when it is confirmed in step S10 that the heating roller 711 has been raised to the control temperature during standby for printing (step S10: No), the post-drying device 7 is ready for printing. Therefore, it is displayed on the operation panel unit 76 that printing is on standby, and this is notified to the operator.

  The above is the control procedure of the post-drying device 7 when the print preparation operation is performed in a state where the roll paper 10 is sufficiently slack. However, for example, when the paper 10 is passed through the post-drying device 7 and there is little slack in the roll paper 10, when the cooling rollers 741 to 744 in step S4 descend, or when the dancer rollers 731 and 732 in step S6 descend. Further, before the cooling rollers 741 to 744 or the dancer rollers 731 and 732 descend to the target positions, they hit the roll paper 10 and stop. In such a case, the process after step S12 is performed.

  That is, when the roll paper 10 is not loose enough while the cooling rollers 741 to 744 are lowered in step S4, the lifting motor 746 of the cooling rollers 741 to 744 continues to operate in the downward direction, but the roll paper is moved by the one-way clutch. It will be in the state which has stopped in contact with 10. The cooling roller 741 to 744 at this time is detected from the difference between the position detected by the encoder of the position detection sensor unit 747 and the position detected by the encoder of the position detection sensor unit 747 at the fixed position during conveyance of the cooling rollers 741 to 744. The amount of paper necessary for the rollers 741 to 744 to descend to the fixed position during conveyance can be checked. This paper amount and the paper amount required to set the dancer rollers 731 and 732 to descend from the upper limit to the control line are required for setting the post-drying device 7 in a state where it can be printed and conveyed. It becomes quantity.

  In step S12, information on the conveyance time or the conveyance amount when the sheet amount is conveyed by inching is displayed on the LCD 760 of the operation panel unit 76, and an inching is requested from the operator. At this time, the cooling rollers 741 to 744 continue to drive in the downward direction, and can be lowered as they are if inching is performed. When the operator performs inching according to the display on the operation panel unit 76, the cooling rollers 741 to 744 gradually descend along with the inching.

  Then, it is checked whether or not the cooling rollers 741 to 744 descending with inching descend to the fixed position during conveyance (step S13). If it is confirmed in step S13 that the cooling rollers 741 to 744 have been lowered to the fixing position during paper conveyance (step S13: No), the cooling rollers 741 to 744 are stopped and fixed, and then the dancer rollers 731 and 731, respectively. The descent of 732 is started (step S14).

  As with the cooling rollers 741 to 744, the dancer rollers 731 and 732 descend while pulling the roll paper 10 conveyed by inching. Therefore, it is further checked whether or not the dancer rollers 731 and 732 have been lowered to the control line during paper conveyance (step S15). When it is confirmed that the dancer roller has lowered to the control line (step S15: No), the transport roller 724 is driven in accordance with the inching transport speed data received from the back surface printing machine (inkjet printer) 6. Thereby, inching conveyance control is started (steps S16 and S17). In this case, since the conveying roller is driven in accordance with the inching conveying speed, the dancer rollers 731 and 732 maintain the position of the control line.

  While the inching is continued, the post-drying device 7 also continues the inching conveyance control. When the inching is stopped (step S16: No), the conveying roller 724 is stopped (step S9), and the post-drying device 7 is also returned to the state in which the printing preparation operation is being performed (step S10).

  At this time, after step S2, the heating roller 711 is heated until reaching the control temperature during standby for printing, but the dancer rollers 731 and 732 are in the control line, and the heating roller 711 is waiting for printing in step S10. When it is confirmed that the temperature has been raised to the control temperature, the post-drying device 7 is ready for printing. Therefore, it is displayed on the operation panel unit that printing is on standby, and this is notified to the operator.

  Similar to the case where the slack of the roll paper 10 is insufficient during the lowering of the cooling rollers 741 to 744 in step S4, the case where the slack of the roll paper 10 is insufficient during the lowering of the dancer rollers 731 and 732 in step S6, The elevating motor 736 of the dancer rollers 731 and 732 continues to operate in the downward direction, but the dancer rollers 731 and 732 are in contact with the roll paper 10 and stopped by the one-way clutch. At this time, from the difference between the encoder detection position of the position detection sensor unit 737 of the dancer rollers 731 and 732 and the encoder detection position of the control line, the amount of paper required for the dancer rollers 731 and 732 to descend to the control line is checked. be able to. This amount of paper is the amount of paper necessary to set the post-drying device 7 in a state where it can be printed and conveyed.

  In step S14, information on the conveyance time or conveyance amount when the sheet amount is conveyed by inching is displayed on the LCD 760 of the operation panel unit 76, and the operator is requested to perform inching. At this time, the dancer rollers 731 and 732 continue to be driven in the downward direction, and can be lowered as they are if inching is performed. When the operator performs inching according to the display on the operation panel section 76, the dancer rollers 731 and 732 gradually descend with the inching.

  Thereafter, the post-drying device 7 can be set in a printable state by performing the same control as in step S15 and subsequent steps.

The speed at which the cooling rollers 741 to 744 and the dancer rollers 731 and 732 descend is such that the cooling rollers 741 to 744 or the dancer rollers 731 and 732 have a sheet conveyance amount and an inching conveyance sheet conveyance speed that occur as the cooling rollers 741 to 744 or dancer rollers 731 and 732 descend Relationship with
It is necessary to descend at such a speed as to satisfy the relationship of the amount of paper transport generated as it descends ≧ the amount of paper transport for inching transport. By controlling in this way, the sheet is always stretched between the cooling roller and the dancer roller during inching sheet conveyance, and the sheet being conveyed can be stabilized.

  In the control of the above flowchart, the cooling rollers 741 to 744 are lowered in step S13 during the inching conveyance, or the dancers 731 and 732 are lowered in step S15. It is not necessary to lower the dancer rollers 731 and 732 to the target position. Even when short inching conveyance is repeated, the cooling rollers 741 to 744 or the dancer rollers 731 and 732 can be similarly lowered to the target position.

  By controlling in this way, when passing the roll paper 10 to the post-drying device 7, the operator does not need to loosen the roll paper 10 for the cooling rollers 741 to 744 or the dancer rollers 731 and 732 to descend. . Then, the cooling rollers 741 to 744 and the dancer rollers 731 and 732 can be lowered by inching after the printing preparation operation, and set at a position during printing. In addition, the inching can be completed with a minimum transport amount by performing inching according to the necessary amount displayed on the operation panel unit 76. In addition, since the heating to the control temperature during the standby state of the heating roller 711 and the lowering control of the cooling rollers 741 to 744 and the dancer rollers 731 and 732 can be executed in parallel in the printing preparation operation, the printing preparation operation can be performed. Control time can be shortened.

  In the present embodiment, when the cooling rollers 741 to 744 and the dancer rollers 731 and 732 are lowered in the paper loading execution operation and the print preparation operation, if the roll paper 10 is not loose enough to be lowered to the target position, The lowering operation of the cooling rollers 741 to 744 and the dancer rollers 731 and 732 is continued to abut against the roll paper 10 and stop. In this state, printing cannot be performed, but inching can be performed, and the cooling rollers 741 to 744 and the dancer rollers 731 and 732 are controlled to be lowered to the target position while the paper is conveyed by inching.

  As a result, even when the amount of roll paper 10 initially stored in front of the post-drying device 7 is small, the operator can cope without retrying from the error cancellation. In addition, since it is not necessary to store a large amount of roll paper 10, the roll paper 10 is not pulled down by the lowering of the cooling rollers 741 to 744 and the dancer rollers 731 and 732, which is a harmful effect caused by storing a large amount of the roll paper 10. In this case, there is no meandering at the time of paper conveyance due to the erroneous detection of the error and the influence of folds and bends of the stacked roll paper 10.

  The flowchart shown in FIG. 4 can be constructed as a program to be executed by a computer. The program may be stored in a recording medium. In that case, the program can be installed in the computer using the recording medium. The recording medium may be a non-transitory recording medium. The non-transitory storage medium is not particularly limited, and for example, a recording medium such as a CD-ROM can be used.

  In this embodiment, the roll paper 10 is described as an example of a continuous transported object. However, in addition to the roll paper 10, a roll-shaped film such as a polypropylene film is used as the continuous transported object. Prepreg, Z paper with perforations at predetermined intervals, and the like.

  As described above, according to the present embodiment, the following effects can be obtained. In the following description of the effects of the embodiments, each component of the claims corresponds to each part of the embodiment, and when the terms are different, the latter is shown in parentheses.

  The transport device according to the present embodiment moves movable rollers (dancer rollers 731 and 732, cooling rollers 741 to 744) movable in a preset direction, and moves the movable rollers in the preset direction (downward direction). A moving motor (elevating motors 736 and 746) to be moved, and a conveyance control unit (microcomputer unit 76) for controlling conveyance of a continuous object (roll paper 11) by a plurality of rollers including the movable roller, The movable roller conveys the continuous object to be conveyed, and the movable motor moves the movable roller in the preset direction. If the cooling roller cannot reach the fixed position) and stops moving in the preset direction (S4, S6), the moving motor When the output of the driving force in the preset direction is continued and stopped, and the conveyance control unit performs conveyance at a speed slower than the normal conveyance speed (inching conveyance), the movable roller Since it moves in the preset direction as it is transported at a low speed (S12 → S17, S18 → S17), even when there is a device for transporting upstream, it can be appropriately transferred to the transported object (roll paper 10). A process of applying tension can be performed.

  In addition, the continuous speed at which the movable roller generates a speed at which the movable roller (dancer rollers 731 and 732, cooling rollers 741 to 744) moves in the preset direction (downward direction) with its movement. The relationship between the transport amount of the transported object (roll paper 10) and the transport amount transported at a speed slower than the normal transport speed (inching transport) occurs with the movement in the preset direction. Since the relationship that the transport amount of the transported object is equal to or greater than the transport amount transported at a speed slower than the normal transport speed is established, tension can be reliably applied to the transported object.

  Since an operation panel (operation panel unit 76) for displaying a conveyance amount that is conveyed (inching conveyance) at a speed slower than the normal conveyance speed at which the above relationship is established, an operation panel (operation panel unit 76) is displayed. Speed) can be set.

  The drying device (post-drying device 7) includes the transport device and the heating roller 711 provided on the upstream side or the downstream side in the continuous transported material transport direction of the movable roller, so that tension is applied. The drying process can be performed in a stretched state.

  Since the image forming system (print transport line 1) includes the transport device and the image forming device (back surface printing machine 6) provided upstream of the transport device in the continuous transported object transport direction. The continuous object to be imaged can be conveyed in a tensioned state.

  Since the image forming apparatus (back surface printing machine 6) is an apparatus (inkjet printer) that ejects liquid onto a recording medium and ejects liquid to be printed (tension paper 10), tension is applied to the recording medium (roll paper 10) wet with the liquid. Can be transported.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention, and all technical matters included in the technical idea described in the claims are included. The subject of the present invention. The above embodiment shows a preferable example, but those skilled in the art can realize various alternatives, modifications, variations, and improvements from the contents disclosed in this specification, These are included in the technical scope described in the appended claims.

1 Print transport line (image forming system)
6 Back side printing machine (inkjet printer: image forming device)
7 Drying device 10 Roll paper (continuous conveyed object),
75 Microcomputer unit (transport control unit)
76 Operation panel section 711 Heating roller 721, 722, 723, 724 Conveying roller 731, 732 Dancer roller (movable roller)
736,746 Lifting motor (moving motor)
741,742,743,744 Cooling roller (movable roller)

JP2015-120268A

Claims (9)

A movable roller movable in a preset direction;
A moving motor for moving the movable roller in the preset direction;
A conveyance control unit for controlling conveyance of a continuous object to be conveyed by a plurality of rollers including the movable roller;
With
The movable roller cannot reach the preset position while the movable roller conveys the continuous object to be conveyed and the moving motor moves the movable roller in the preset direction. When the movement in the selected direction is stopped, the moving motor continues to output the driving force in the preset direction, and after the stop, the transfer control unit transfers at a speed slower than the normal transfer speed. When the transfer is performed, the movable roller moves in the preset direction along with the transfer at the slow speed. It is a conveying apparatus of Claim 1, Comprising:
The speed at which the movable roller moves in the preset direction is such that the movable roller transports at a speed that is slower than the normal transport speed and the transport amount of the continuous transport object generated along with its movement. The relationship with the transport amount is established that the transport amount of the continuous objects to be transported generated in accordance with the movement in the preset direction is equal to or greater than the transport amount transported at a speed slower than the normal transport speed. Conveying device that is speed. It is a conveyance apparatus of Claim 2, Comprising:
A transport apparatus comprising an operation panel that displays a transport amount that is transported at a speed slower than the normal transport speed at which the relationship is established. It is a conveying apparatus of any one of Claim 1 thru | or 3, Comprising:
The conveying device in which the movable roller includes a dancer roller and a cooling roller. A transport device according to any one of claims 1 to 4,
A heating roller provided on the upstream side or the downstream side in the continuous transported object conveyance direction of the movable roller;
Drying device equipped with. A transport device according to any one of claims 1 to 4,
An image forming apparatus provided on the upstream side of the continuous conveyance object conveyance direction of the conveyance apparatus;
An image forming system. The image forming system according to claim 6,
An image forming system in which the image forming apparatus is an apparatus for discharging a liquid to be printed by discharging the liquid onto a recording medium. A moving method in which a movable roller is moved by a moving motor in a preset direction and a continuous object is conveyed by a plurality of rollers including the movable roller.
The movable roller cannot reach the preset position in a state where the movable object is conveyed by the movable roller and the movable motor moves the movable roller in the preset direction. When the movement in the set direction is stopped, the output of the driving force in the preset direction of the moving motor is continued, and after the stop, the transfer at a speed slower than the normal transfer speed is performed, A transport method for moving the movable roller in the preset direction along with the transport at the slow speed. On the computer,
A procedure for moving the movable roller in a preset direction by a moving motor;
A procedure of conveying a continuous object to be conveyed by a plurality of rollers including the movable roller;
The movable roller cannot reach the preset position in a state where the movable object is conveyed by the movable roller and the movable motor moves the movable roller in the preset direction. When the movement in the set direction is stopped, the procedure of continuing the output of the driving force in the preset direction of the moving motor;
After the stop, a procedure for performing conveyance at a speed slower than a normal conveyance speed and moving the movable roller in the preset direction along with the conveyance at the slow speed;
Conveying program to execute.