JP6626407B2 - Continuous paper take-up device - Google Patents

Description

  The present invention relates to a continuous paper take-up device, and is particularly preferably applied to a continuous paper take-up device having a tension applying section for applying tension to printed continuous paper discharged from a printing device.

  Conventionally, a continuous paper take-up device is provided with a tension bar that contacts the continuous paper from above on the upstream side of a take-up shaft, and a winding linear speed, which is a take-up speed of the continuous paper take-up device, is determined by a discharge speed from a printing device. There is a type in which a speed is higher than a certain linear speed of a printing apparatus, and the tension bar is moved up and down to apply an appropriate tension to the continuous paper discharged from the printing apparatus, thereby performing a reliable winding roll ( For example, see Patent Document 1).

  Such a continuous paper winding device starts winding when the position of the tension bar reaches the lowermost position, and stops winding when the tension bar reaches the uppermost position. In the continuous paper take-up device, since the continuous paper is discharged from the printing device, when the take-up is stopped at the top of the tension bar, the tension bar is lowered by its own weight, and when reaching the bottom, the take-up resumes, and the take-up line is taken up. Since the speed is set faster than the printing device linear speed, the tension bar will rise.

JP-A-2003-261121

  However, in such a continuous paper take-up device, since the take-up speed is constant, when the take-up amount increases and the take-up diameter of the take-up shaft increases, it is set at the start of take-up so that appropriate tension is applied. The actual winding speed is higher than the winding speed. In this case, the tension applied to the continuous paper becomes larger than an appropriate tension, and the winding quality of the continuous paper may be reduced.

  The present invention has been made in consideration of the above points, and has as its object to propose a continuous paper winding device that can improve winding quality.

In order to solve such a problem, in a continuous paper take-up device of the present invention, a tension applying portion is provided upstream of a take-up shaft for winding continuous paper issued from a printing device and applies tension to the continuous paper; A position detecting sensor that detects the tension applying unit at a plurality of detection positions within the moving range of the unit, and the tension applying unit is detected by the position detecting sensor within a predetermined set time while the winding shaft is being rotated. In this case, a rotation speed setting unit that reduces the rotation speed of the winding shaft and a motor drive unit that rotates the winding shaft at the rotation speed set by the rotation speed setting unit are provided , and the position detection sensor controls the tension applying unit. A lower position detecting sensor for detecting a lowermost tension applying section, a tension applying section at a winding linear velocity down position, and a winding section. An upper position detection sensor for detecting a tension applying portion at the uppermost position of the tension applying portion control located below the speed down position, and a rotational speed setting portion, the tension rising from the lowermost position of the tension applying portion control. When the application section reaches the winding linear speed down position within the set time, the rotation speed of the winding shaft is reduced.

  Accordingly, in the present invention, when the winding diameter of the continuous paper on the winding shaft is increased and the winding linear speed is increased, the tension applied to the continuous paper is increased by reducing the rotation speed of the winding shaft. It is possible to prevent the paper from being excessively bent and to apply appropriate tension to the continuous paper regardless of the winding diameter.

  According to the present invention, when the winding diameter of the continuous paper on the winding shaft is increased and the winding linear speed is increased, the tension applied to the continuous paper is increased by reducing the rotation speed of the winding shaft. It is possible to prevent the paper from being excessively bent and to apply appropriate tension to the continuous paper regardless of the winding diameter. Thus, the present invention can realize a continuous paper winding device capable of improving winding quality.

FIG. 2 is a diagram illustrating a configuration of a continuous paper issuing device. It is a figure showing operation of a tension bar. It is a block diagram showing composition of a continuous paper winding device. It is a flowchart which shows a continuous paper winding processing procedure (1). It is a flowchart which shows the continuous paper winding processing procedure (2). It is a flowchart which shows a reference time measurement initial processing procedure.

  Hereinafter, embodiments for carrying out the invention (hereinafter, referred to as embodiments) will be described with reference to the drawings.

[1. Embodiment]
[1-1. Configuration of continuous paper issuing device]
As shown in FIG. 1, the continuous paper issuing device 1 includes a continuous paper take-up device 2 and a printing device 4. The printing device 4 performs printing on a rolled continuous paper (not shown), and discharges the printed continuous paper CP to the outside of the printing device 4. The continuous paper take-up device 2 takes up the printed continuous paper CP discharged from the printing device 4 around a take-up shaft 34.

[1-2. Configuration of continuous paper take-up device]
As shown in FIG. 1, the winding shaft 34 is a shaft around which the continuous paper CP is wound. The winding shaft 34 is rotated counterclockwise by the driving force of the DC motor 32 shown in FIG. The paper CP is wound up. The tension bar 36 is attached to a tension bar shaft 38 shown in FIG. 2 and can move up and down between the tension bar movable ranges h4. The tension bar 36 contacts the continuous paper CP wound by the winding shaft 34 from above. Accordingly, an appropriate tension is applied to the continuous paper CP by the weight of the tension bar 36 and the tension of the winding of the continuous paper CP. The tension bar shaft 38 is a shaft to which the tension bar 36 is attached, and a sensor shielding plate 44 is attached. The sensor shielding plate 44 moves together with the vertical movement of the tension bar 36. The guide roller 40 is a guide for guiding the continuous paper CP to the winding shaft 34 by contacting the lower side of the continuous paper CP.

  In the continuous paper winding device 2, the winding shaft 34 has an apparent outer diameter increasing as the continuous paper CP is wound. In FIG. 1, the apparent outer diameter of the winding shaft 34 in the thinnest state in the continuous paper winding device 2, the continuous paper CP, and the tension bar 36 are indicated by solid lines, and the winding shaft 34 in the thickest state is shown. The apparent outer diameter, the continuous paper CP, and the tension bar 36 are indicated by broken lines. Here, the thinnest state means that the continuous paper CP is the shortest in design and is wound around the winding shaft 34 (that is, the leading end of the continuous paper CP is taped to the winding shaft 34 when the winding operation is started). In this state, the winding diameter D, which is the apparent outer diameter of the winding shaft 34, is the minimum winding diameter Dn. The thickest state is a state in which the continuous paper CP is longest in design and is wound around the winding shaft 34, and the winding diameter D is the maximum maximum winding diameter Dc.

  In the continuous paper winding device 2, as the winding operation is continued, the winding diameter D gradually increases from the minimum winding diameter Dn and increases toward the maximum winding diameter Dc. Accordingly, in the continuous paper winding device 2, the winding linear speed VLw gradually increases from the minimum winding linear speed VLwn and increases toward the maximum winding linear speed VLwc. The winding amount of the paper CP increases.

  The printing apparatus linear speed VLp is a speed at which the continuous paper CP is discharged from the printing apparatus 4, and the printing apparatus linear velocity VLp during discharging the continuous paper CP is always a constant speed. The minimum winding diameter Dn is a state when the winding diameter D is still small (the thinnest state), and a winding linear velocity VLw that is a speed at which the continuous paper CP is wound on the winding shaft 34 in that state is: The minimum winding linear speed is VLwn. The maximum winding diameter Dc is a state when the winding operation continues and the winding diameter D increases (the thickest state), and the winding linear velocity VLw in this state is the maximum winding linear velocity VLwc. In the continuous paper winding device 2, when the rotation speed of the DC motor 32 is constant, (minimum winding linear speed VLwn <maximum winding linear speed VLwc), and the winding linear speed VLw starts the winding operation. Immediately after, the printing speed is set to be higher than the printing device linear speed VLp.

  The lower limit position Pmd of the tension bar operation shown in FIG. 2 is the lowermost position at which the tension bar 36 can physically descend. The tension bar operation uppermost position Pmu is the uppermost position at which the tension bar 36 can physically rise. The tension bar movable range h4 is a height from the tension bar operation lower limit position Pmd to the tension bar operation upper limit position Pmu, and represents a maximum range in which the tension bar 36 can physically operate.

  The lowermost position of the tension bar control Pcd as the lowermost position of the tension applying unit control is the lowermost position of an optimal design movement range of the tension bar 36, and the lower end of the descending sensor shielding plate 44 is positioned at the lower position detection sensor 42D. Is detected by shielding the light. The tension bar control uppermost position Pcu as the tension imparting unit control uppermost position is the uppermost position of the optimal design movement range of the tension bar 36, and the upper end of the ascending sensor shielding plate 44 is positioned at the upper position detection sensor 42U. Is detected by shielding the light. The tension bar control movable range h2 is a height from the tension bar control lowermost position Pcd to the tension bar control uppermost position Pcu, and represents an optimal design moving range (basic operation control range) of the tension bar 36. I have.

  Here, in the continuous paper take-up device 2 as described above, if the take-up operation is continued, the take-up diameter D increases, and the take-up linear velocity VLw increases. May increase, and the tension bar 36 may exceed the tension bar control uppermost position Pcu. The winding linear speed down position PLVwd is a position where it is determined that the tension force has become inappropriate when the tension bar 36 further rises beyond the tension bar control uppermost position Pcu. The winding line speed down position PLVwd is that the state of the upper position detection sensor 42U has transitioned from the shielded state to the unshielded state after the tension bar control uppermost position Pcu is detected in the winding operation for a predetermined time. Is detected by The movable range h1 of the tension bar winding line speed down control is a height from the lowermost position Pcd of the tension bar control to the winding line speed down position PLVwd, and represents a winding line speed down operation control range of the tension bar 36. I have.

  The position detection sensor 42 includes a lower position detection sensor 42D and an upper position detection sensor 42U. The lower position detection sensor 42D is a transmission type photoelectric sensor, for example, and detects that the tension bar 36 has reached the lowermost position Pcd of the tension bar control. The upper position detection sensor 42U is, for example, a transmission type photoelectric sensor, and detects that the tension bar 36 has reached the tension bar control uppermost position Pcu, and also detects that the winding bar has reached the take-up line speed lower position PLVwd. It is. The mounting position of the upper position detection sensor 42U is higher than the tension bar control uppermost position Pcu by the sensor shield plate length h3 (ie, the tension bar control uppermost position Pcu + sensor shield plate length h3).

  The sensor shield plate 44 is a plate-shaped member having a length of the sensor shield plate h3 in the up-down direction. The sensor shield plate length h3 ranges from the tension bar take-up linear speed down control movable range h1 to the tension bar control movable range h2. Is subtracted from the length obtained by subtracting 1 mm by 1 mm (that is, the take-up linear velocity down position PLVwd-the uppermost tension bar control position Pcu-1 mm). Therefore, the sensor shielding plate 44 changes the upper position detection sensor 42U from the non-shielding state to the shielding state when the tension bar 36 rises and reaches the tension bar control uppermost position Pcu, and the tension bar 36 further rises. When reaching the winding linear speed down position PLVwd, the upper position detection sensor 42U can be changed from the shielding state to the non-shielding state.

  An operation panel 46 (FIG. 1) is an operation input unit through which a user operates the continuous paper take-up device 2, and a switch 48 for instructing start or end of a take-up operation, and an illustration for instructing a take-up direction. It has a variety of switches, such as a switch that does not operate, and a display function that indicates the state of the device. The operation panel 46 outputs switch information to the microprocessor 10 as a control unit when the switch 48 is operated by the user. When the switch 48 is turned on based on the switch information, the microprocessor 10 controls the DC motor control circuit 30 (FIG. 3) to rotate the DC motor 32, thereby rotating the winding shaft 34 in the winding direction Rw. When the switch 48 is turned off, the DC motor 32 is stopped by controlling the DC motor control circuit 30 to stop the rotation of the winding shaft 34 and start the winding operation. finish.

[1-3. Control configuration of continuous paper take-up device]
As shown in FIG. 3, in the continuous paper take-up device 2, the microprocessor 10 supervises and controls each unit (the operation panel 46, the DC motor control circuit 30, the position detection sensor 42, and the like). The microprocessor 10 has a ROM (Read Only Memory) 12, a RAM (Random Access Memory) 14, and an I / O port 16, and reads and executes a predetermined program from the ROM 12 to control each unit. Various processing such as continuous paper winding processing is performed. Further, the microprocessor 10 controls the DC motor 32 by controlling the DC motor control circuit 30 based on the states of the switch 48, the lower position detection sensor 42D, and the upper position detection sensor 42U.

  The ROM 12 stores a control program for the microprocessor 10, rotation speed information (initial motor speed information) of the DC motor 32 to which an optimal tension is applied at the start of winding of the continuous paper CP, rotation direction information of the DC motor 32, and the like. And a speed reduction rate used when the winding linear speed is reduced. The control program of the microprocessor 10 includes a determination unit 18, a detection unit 20, a rotation speed setting unit 22, and a motor drive unit 24. The determination unit 18 determines the operation of the continuous paper take-up device 2 based on the switch information from the switch 48, the position determination of the tension bar 36 based on the sensor information from the lower position detection sensor 42D and the upper position detection sensor 42U, and the winding linear speed. Various determinations such as a down determination and a determination whether the count of the timer has reached the reference time t1 are performed. The detection unit 20 detects a state change of the switch 48, the lower position detection sensor 42D, and the upper position detection sensor 42U based on the obtained switch information and sensor information. The rotation speed setting unit 22 changes the winding speed of the winding shaft 34 by setting the rotation speed of the DC motor 32. The motor drive unit 24 drives the DC motor 32 by sending a motor control command to the DC motor control circuit 30 via the I / O port 16.

  The RAM 14 is used as a memory for managing various kinds of information in the continuous paper winding process, and also stores winding linear speed information described later. The I / O port 16 is an input / output port of the microprocessor 10 and sends out a motor control command from the motor drive unit 24 to the DC motor control circuit 30 and acquires switch information and centimeter information. The DC motor control circuit 30 controls the DC motor 32 that operates the winding shaft 34.

[1-4. Continuous paper winding processing procedure]
[1-4-1. Processing before reference time measurement initial processing]
Next, a specific processing procedure of the continuous paper take-up processing by the continuous paper take-up device 2 will be described with reference to the flowcharts of FIGS. When the user of the continuous paper issuing device 1 turns on the continuous paper take-up device 2, the microprocessor 10 reads out and executes the continuous paper take-up processing program from the ROM 12, thereby starting the continuous paper take-up processing procedure RT1. Move to step SP1.

  At step SP1, the microprocessor 10 determines whether or not the switch 48 is ON based on the switch state. If a negative result is obtained here, this indicates that the switch 48 is OFF, and at this time, the microprocessor 10 proceeds to step SP2, and determines whether or not the continuous paper take-up device 2 is operating. Determined by If a negative result is obtained here, the microprocessor 10 returns to step SP1 at this time and waits until the switch 48 is turned on by the user.

  Here, when the printing device 4 starts printing while the continuous paper take-up device is stopped, the printing device 4 starts discharging the continuous paper CP on which printing has been completed. When the continuous paper take-up device is stopped, the tension bar 36 is at the lowermost position Pmd of the tension bar operation. The user holds the leading end of the discharged continuous paper CP, dives the continuous paper CP under the tension bar 36, then hangs it on the guide roller 40, and then puts the continuous paper CP on the winding shaft 34. After the tip of the CP is taped, the switch 48 is depressed to turn it on. When detecting that the state of the switch 48 has changed from OFF to ON, the detection unit 20 sends the switch state to the determination unit 18.

  If the user turns on the switch 48 to obtain an affirmative result in step SP1, the microprocessor 10 proceeds to step SP4, and determines whether or not the continuous paper take-up device 2 is operating as in step SP2. The determination is made by the determination unit 18. If a negative result is obtained here, this means that the DC motor 32 is currently stopped and the switch 48 has been turned ON by the user who wants to start the winding operation. In step SP5, the motor drive unit 24 notifies the DC motor control circuit 30 of the initial motor speed information and the rotation direction in the ROM 12, starts the winding operation by operating the DC motor 32, and returns to step SP1. A positive result is obtained in step SP4, and the process proceeds to step SP6.

  The initial motor speed is set such that the winding linear speed VLw when the DC motor 32 is rotated at the initial motor speed is higher than the printing device linear speed VLp. For this reason, when the continuous paper winding device 2 starts the winding operation, the tension bar 36 of the heavy object is raised by the continuous paper CP, and the tension is applied between the winding shaft 34 and the tension bar 36. Become. In addition, the printing apparatus linear velocity VLp may change depending on the material, thickness, etc. of the continuous paper CP on which printing is performed, but since the winding linear velocity VLw is set based on the maximum speed of the printing apparatus linear velocity VLp, The winding linear speed VLw does not become slower than the printing device linear speed VLp due to the fluctuation of the printing device linear speed VLp. Further, once printing is started, the printing apparatus linear velocity VLp does not fluctuate until printing of one roll of continuous paper CP is completed. When the continuous paper take-up device 2 continues the take-up operation, the tension bar 36 rises, and accordingly, the tension bar shaft 38 and the sensor shielding plate 44 also rise.

  In step SP6, the microprocessor 10 determines whether or not the reference time measurement initial processing has been completed by the determination unit 18. Since the reference time measurement initial process has not been started yet (that is, the reference time t1 has not been measured), the microprocessor 10 obtains a negative result in step SP6 and proceeds to step SP7, where the reference time shown in FIG. Move to step SP30 in measurement initial processing procedure SRT1.

[1-4-2. Reference time measurement initial processing]
In step SP30, the microprocessor 10 uses the determination unit 18 to determine a processing step in the reference time measurement initial processing. This processing step is stored in the RAM 14 as processing step information. When the processing first enters the reference time measurement initial processing procedure SRT1, the processing is set to the first step, and thereafter, the processing is set in the order of the second step and the third step. At present, since the processing step is set to the first step, the microprocessor 10 moves from step SP30 to step SP31.

  In step SP31, the microprocessor 10 determines whether or not the blocking state of the upper position detection sensor 42U has been detected by the detection unit 20. If a negative result is obtained here, this means that although the tension bar 36 has risen, it is still positioned below the tension bar control uppermost position Pcu, and at this time, the microprocessor 10 proceeds to step SP41. Then, the reference time measurement initial processing procedure SRT1 is completed, the procedure returns to step SP1 of the continuous paper winding processing procedure RT1 (FIG. 4), and the processing returns to step SP31 via steps SP4, SP6, and SP30, and returns to step SP31. The detection unit 20 determines again whether the blocking state is detected. As described above, the microprocessor 10 repeatedly executes the steps SP30, SP31, and SP41 of the reference time measurement initial processing procedure SRT1 and the steps SP1, SP4, and SP6 of the continuous paper winding processing procedure RT1 in order, thereby obtaining the upper position detection sensor. It waits until the 42U shielding state is detected.

  If an affirmative result is obtained in step SP31 by detecting the shielding state of the upper position detection sensor 42U, this indicates that the tension bar 36 has risen and has been positioned at the tension bar control uppermost position Pcu. Is determined by the determination section 18 as the tension bar control uppermost position Pcu, and the routine goes to Step SP32.

  As described above, when the continuous paper take-up device 2 starts the take-up operation while the continuous paper take-up device is stopped, in the first step of the reference time measurement initial processing procedure SRT1, the tension bar control is started from the lower limit position Pmd of the tension bar operation. By raising the tension bar 36 to the uppermost position Pcu, the slack of the continuous paper CP is removed, and the tension is applied to the continuous paper CP by the tension bar 36 normally.

  In step SP32, the microprocessor 10 sets the processing step information to the second step, and proceeds to step SP33. In step SP33, the microprocessor 10 controls the DC motor control circuit 30 by the motor driving unit 24 to stop the DC motor 32 in the same manner as in step SP3, thereby terminating the winding operation and proceeding to step SP41, where the reference time measurement initials are set. The processing step of the first step in the processing procedure SRT1 is completed, and the process returns to the step SP1 of the continuous paper winding processing procedure RT1 (FIG. 4), and through the steps SP4 and SP6, the step SP30 of the reference time measurement initial processing procedure SRT1 (FIG. 6). Then, the determination unit 18 determines the processing step in the reference time measurement initial process. At present, since the processing step is set to the second step, the microprocessor 10 moves from step SP30 to step SP34. Here, since the DC motor 32 is currently stopped and the winding is stopped, the tension bar 36 is discharged from the printing apparatus 4 from the tension bar control uppermost position Pcu to the tension bar control lowermost position Pcd. While applying tension by its own weight to the continuous paper CP.

  In step SP34, the microprocessor 10 determines whether or not the blocking state of the lower position detection sensor 42D has been detected by the detection unit 20. If a negative result is obtained here, this means that the tension bar 36 is lowered but is still positioned above the lowermost position of the tension bar control Pcd, and at this time, the microprocessor 10 proceeds to step SP41. The transfer reference time measurement initial processing procedure SRT1 is completed, the process returns to step SP1 of the continuous paper winding processing procedure RT1 (FIG. 4), and the steps are again performed via steps SP4 and SP6 and the reference time measurement initial processing procedure SRT1 (FIG. 6) SP30. The process proceeds to SP34, and the detection unit 20 determines again whether or not the shielding state of the lower position detection sensor 42D has been detected. As described above, the microprocessor 10 repeatedly executes the steps SP30, SP34, and SP41 of the reference time measurement initial processing procedure SRT1 and the steps SP1, SP4, and SP6 of the continuous paper winding processing procedure RT1 in order, so that the lower position detection sensor It waits until the shielding state of 42D is detected.

  If an affirmative result is obtained in step SP34 by detecting the blocking state of the lower position detection sensor 42D, this indicates that the tension bar 36 has moved down and has been positioned at the lowermost position Pcd of the tension bar control. Is determined by the determination unit 18 as the lowermost position Pcd of the tension bar control, and the routine goes to step SP35.

  In step SP35, the microprocessor 10 starts measuring the reference time t1, and proceeds to step SP36. The reference time t1 is a time when the tension bar 36 reaches the tension bar control lowermost position Pcd from the tension bar control lowermost position Pcd when the DC motor 32 is rotated at the initial motor speed in the thinnest state.

  In step SP36, the microprocessor 10 sets the processing step information to 3rd steps, and proceeds to step SP37. In step SP37, the microprocessor 10 starts the winding operation by controlling the DC motor control circuit 30 by the motor driving unit 24 and operating the DC motor 32 in the same manner as in step SP5, and proceeds to step SP41, where the reference time measurement initials are set. The processing step of the 2nd step in the processing procedure SRT1 is completed, the process returns to the step SP1 of the continuous paper winding processing procedure RT1 (FIG. 4), and the step SP30 of the reference time measurement initial processing procedure SRT1 (FIG. 6) is performed via steps SP4 and SP6. Then, the determination unit 18 determines the processing step in the reference time measurement initial process.

  As described above, when the continuous paper winding device 2 stops the winding operation, the tension bar is controlled from the uppermost position Pcu of the tension bar control to the lowermost position Pcd of the tension bar control in the second step of the reference time measurement initial processing procedure SRT1. 36 is lowered by its own weight, the measurement of the reference time t1 is started, and the winding operation is started.

  At present, since the processing step is set to the third step, the microprocessor 10 moves from step SP30 to step SP38. In step SP38, the microprocessor 10 uses the detection unit 20 to determine whether or not the shielded state of the upper position detection sensor 42U has been detected, as in step SP31. If a negative result is obtained here, this means that although the tension bar 36 has risen, it is still positioned below the tension bar control uppermost position Pcu, and at this time, the microprocessor 10 proceeds to step SP41. Then, the reference time measurement initial processing procedure SRT1 is completed, the process returns to step SP1 of the continuous paper winding processing procedure RT1 (FIG. 4), and is again performed via steps SP4 and SP6 and SP30 of the reference time measurement initial processing procedure SRT1 (FIG. 6). In step SP38, the detection unit 20 determines again whether or not the shielding state of the upper position detection sensor 42U has been detected. As described above, during the measurement of the reference time t1, the microprocessor 10 sequentially and repeatedly executes the steps SP30, SP38, and SP41 of the reference time measurement initial processing procedure SRT1 and the steps SP1, SP4, and SP6 of the continuous paper winding processing procedure RT1. By doing so, it waits until it detects the shielding state of the upper position detection sensor 42U.

  If an affirmative result is obtained in step SP38 by detecting the shielding state of the upper position detection sensor 42U, this indicates that the tension bar 36 has risen and has been positioned at the tension bar control uppermost position Pcu. Is determined by the determination section 18 as the tension bar control uppermost position Pcu, and the routine goes to step SP39. In step SP39, the microprocessor 10 ends the measurement of the reference time t1, stores the measured reference time t1 in the RAM 14, and proceeds to step SP40.

  In step SP40, the microprocessor 10 controls the DC motor control circuit 30 with the motor drive unit 24 to stop the DC motor 32 in the same manner as in step SP33, thereby terminating the winding operation, and moving to step SP41, where the reference time measurement initials are set. By ending the 3rd step in the processing procedure SRT1, all the processing in the reference time measurement initial processing procedure SRT1 is ended, returning to the step SP1 of the continuous paper winding processing procedure RT1 (FIG. 4), and through the step SP4. Move to step SP6.

  As described above, when the continuous paper winding device 2 starts the winding operation in the reference time measurement initial processing, in the processing step of the 3rd step of the reference time measurement initial processing procedure SRT1, the tension bar control lowermost position Pcd is changed to the tension bar control initial position. The reference time t1 required for raising the tension bar 36 to the upper position Pcu is obtained, and the winding operation is stopped.

[1-4-3. Processing after reference time measurement initial processing]
Here, since the DC motor 32 is currently stopped and the winding is stopped, the tension bar 36 is discharged from the printing apparatus 4 from the tension bar control uppermost position Pcu to the tension bar control lowermost position Pcd. While applying tension by its own weight to the continuous paper CP. If a positive result is obtained in step SP6 due to the completion of the reference time measurement initial processing, the microprocessor 10 proceeds to step SP8, and the determination unit 18 determines whether the DC motor 32 is operating. If a negative result is obtained here, this means that winding is currently stopped, and at this time, the microprocessor 10 proceeds to step SP9.

  In step SP9, similarly to step SP34 (FIG. 6), the microprocessor 10 determines whether or not the blocking state of the lower position detection sensor 42D has been detected by the detection unit 20. If a negative result is obtained here, this means that although the tension bar 36 has been lowered, it is still positioned above the lowermost position Pcd of the tension bar control. At this time, the microprocessor 10 proceeds to step SP1. Returning to step SP9 via steps SP4, SP6 and SP8, the detection unit 20 determines again whether or not the shielding state of the lower position detection sensor 42D has been detected. As described above, the microprocessor 10 waits until the shielding state of the lower position detection sensor 42D is detected by sequentially and repeatedly executing the steps SP1, SP4, SP8, and SP9 of the continuous paper winding processing procedure RT1.

  If an affirmative result is obtained in step SP9 by detecting the shielded state of the lower position detection sensor 42D, this indicates that the tension bar 36 has moved down and has been positioned at the lowermost position Pcd of the tension bar control. Is determined by the determination unit 18 as the lowermost position Pcd of the tension bar control, and the routine goes to step SP10.

  In step SP10, the microprocessor 10 starts counting the timer, and proceeds to step SP11. In step SP11, the microprocessor 10 starts the winding operation by controlling the DC motor control circuit 30 by the motor driving unit 24 and stopping the DC motor 32 in the same manner as in step SP5, returns to step SP1, and returns to steps SP4 and SP6. To SP8.

  If a positive result is obtained in step SP8 by determining that the DC motor 32 is operating, the microprocessor 10 proceeds to step SP12, and determines whether or not the count of the timer has reached the reference time t1 (that is, whether or not a timeout has occurred). Is determined by the determination unit 18. If a negative result is obtained here, this indicates that the timer is currently counting up toward the reference time t1, at which time the microprocessor 10 returns to step SP1, and through steps SP4, SP6 and SP8, Moving again to step SP12, the determination unit 18 determines whether the count of the timer has reached the reference time t1. As described above, the microprocessor 10 waits until the count of the timer reaches the reference time t1 by sequentially and repeatedly executing steps SP1, SP4, SP6, SP8, and SP12 of the continuous paper winding processing procedure RT1.

  If a positive result is obtained in step SP12 by determining that the count of the timer has reached the reference time t1, this indicates that it is necessary to confirm where the tension bar 36 is located at this time. At this time, the microprocessor 10 proceeds to step SP13 (FIG. 5).

  In step SP13, the microprocessor 10 determines whether or not the blocking state of the upper position detection sensor 42U has been detected by the time the count of the timer reaches the reference time t1. If a positive result is obtained here, this means that when the count of the timer reaches the reference time t1, the tension bar 36 is located at the uppermost position Pcu of the tension bar control or above the uppermost position Pcu of the tension bar control. (Ie, the tension bar 36 has risen to at least the tension bar control uppermost position Pcu), and the microprocessor 10 proceeds to step SP14.

  In step SP14, the microprocessor 10 determines whether or not the shielding state of the upper position detection sensor 42U is currently detected by the detection unit 20. If a positive result is obtained here, this means that when the count of the timer reaches the reference time t1, the tension bar 36 is above the tension bar control uppermost position Pcu and is higher than the winding wire speed down position PLVwd. This indicates that the tension bar 36 has risen above the tension bar control uppermost position Pcu but has not reached the winding linear speed down position PLVwd. At this time, the microprocessor 10 proceeds to step SP16. Move to

  Actually, immediately after the reference time measurement initial processing is performed, the winding diameter D is close to the minimum winding diameter Dn. Therefore, after the reference time t1 has elapsed, the tension bar 36 is moved to the uppermost position Pcu of the tension bar control. Rise only slightly above the tension bar control uppermost position Pcu. Therefore, immediately after performing the reference time measurement initial process, the microprocessor 10 obtains a positive result in steps SP13 and SP14 and proceeds to step SP16.

  In step SP16, the microprocessor 10 controls the DC motor control circuit 30 by the motor drive unit 24 to stop the DC motor 32 in the same manner as in step SP3, thereby terminating the winding operation, and returning to step SP1 (FIG. 4). The process moves to step SP8 via steps SP4 and SP6, where a negative result is obtained, and the process moves to step SP9. Subsequently, the microprocessor 10 waits until the shield position of the lower position detection sensor 42D is detected by sequentially and repeatedly executing steps SP1, SP4, SP8, and SP9.

  If an affirmative result is obtained in step SP9 by detecting the shielded state of the lower position detection sensor 42D, this indicates that the tension bar 36 has moved down and has been positioned at the lowermost position Pcd of the tension bar control. Is determined by the determination unit 18 as the lowermost position Pcd of the tension bar control, and the routine goes to step SP10.

  In step SP10, the microprocessor 10 resets the timer and starts counting the timer, and proceeds to step SP11. In step SP11, the microprocessor 10 starts the winding operation by controlling the DC motor control circuit 30 by the motor driving unit 24 and operating the DC motor 32 in the same manner as in step SP5, returns to step SP1, and returns to steps SP4 and SP6. To SP8, and a positive result is obtained, and the process proceeds to SP12. Subsequently, the microprocessor 10 waits until the count of the timer reaches the reference time t1 by sequentially and repeatedly executing steps SP1, SP4, SP6, SP8, and SP12.

  Actually, when the time elapses after the reference time measurement initial processing is performed and the winding diameter D approaches the maximum winding diameter Dc from the minimum winding diameter Dn, the tension bar 36 starts the tension bar control. The reciprocating movement from the lower position Pcd to the position after the elapse of the reference time t1 is repeated, and the position after the elapse of the reference time t1 gradually increases from the uppermost position Pcu of the tension bar control to the winding line speed down position PLVwd. I will do it. At the same time, the moving speed of the tension bar 36 in the upward direction gradually increases.

  If the lower end of the sensor shielding plate 44 is located above the upper position detection sensor 42U and a negative result is obtained in step SP14, this means that the tension bar 36 is wound when the count of the timer reaches the reference time t1. It indicates that it has reached the take-up line speed down position PLVwd, and at this time, the microprocessor 10 proceeds to step SP15.

  In step SP15, the microprocessor 10 performs a rotation speed reduction process, which is a process of reducing the rotation speed of the DC motor 32, by the rotation speed setting unit 22 and the motor driving unit 24, and proceeds to step SP16. Specifically, the microprocessor 10 uses the rotation speed setting unit 22 to change the current rotation speed of the DC motor 32 stored in the RAM 14 to the speed reduction rate stored in the ROM 12 (tension bar control movable range h2 / A value obtained by multiplying the tension bar winding linear speed down control movable range h1) is set as a new rotation speed of the DC motor 32. As a result, the rotation speed of the DC motor 32 is reduced from the next winding operation by an amount corresponding to the interval between the winding linear speed down position PLVwd and the tension bar control uppermost position Pcu along the moving direction of the tension bar 36. Become. Therefore, the position of the tension bar 36 at the end of winding in the next winding operation is the tension bar control uppermost position Pcu.

  Thus, when the tension bar 36 is raised from the tension bar control lowermost position Pcd next time, the continuous paper take-up device 2 can prevent the tension bar control uppermost position Pcu from exceeding the tension bar control uppermost position Pcu after the elapse of the reference time t1. The upward movement speed of the reference time measurement 36 can be made as slow as immediately after the reference time measurement initial processing is performed.

  The user visually confirms that the trailing end of the continuous paper CP has been ejected from the printing apparatus 4 and confirms the end of continuous printing by the printing apparatus 4, and then presses the switch 48 to turn it off. When detecting that the state of the switch 48 has changed from ON to OFF, the detection unit 20 sends the switch state to the determination unit 18. If the user turns off the switch 48 and obtains a negative result in step SP1, this means that the switch 48 has been turned off by the user who wants to stop the DC motor 32. At this time, the microprocessor 10 Obtains a positive result in step SP2, moves to step SP3, and controls the DC motor control circuit 30 by the motor driving unit 24 to stop the DC motor 32 in the same manner as in step SP33, thereby terminating the winding operation, and completing step SP1. Then, the user waits until the user presses the switch 48 to turn it on after the user has taped the front end of the new continuous paper CP to the winding shaft 34.

  By the way, if a negative result is obtained in step SP13, this means that, for example, the upper position detection sensor 42U or the like has failed, so that even if the timer count reaches the reference time t1, the tension bar 36 is not controlled by the tension bar control. This indicates a winding error state in which it has been determined that the upper position Pcu has not been reached. At this time, the microprocessor 10 proceeds to step SP17. In step SP17, as a take-up error process, the microprocessor 10 controls the DC motor control circuit 30 by the motor drive unit 24 to stop the DC motor 32 in the same manner as in step SP3, thereby terminating the take-up operation, and returning to step SP1. Return.

[1-5. effect]
In the conventional continuous paper take-up device, since the take-up speed is constant, when the take-up amount increases and the take-up diameter D increases, the take-up linear speed set at the start of take-up so that an appropriate tension is applied. The actual winding linear speed VLw becomes faster than VLw. At this time, since the printing apparatus linear speed VLp is the same, the rising speed of the tension bar 36 from the start of winding to the stop of winding is increased in proportion to the increase in the winding linear speed VLw, thereby giving the continuous paper CP. There is a possibility that the tension applied is larger than the appropriate tension and the winding quality of the continuous paper is reduced. Further, if the winding quality is reduced, the tension is increased, and there is a possibility that the print may be extended or the paper may be cut out, and the print quality may be reduced.

  On the other hand, the continuous paper take-up device 2 monitors the position of the tension bar when the take-up operation is performed for the reference time t1 from the lowermost position Pcd of the tension bar control, and moves the tension bar upward from the uppermost position Pcu of the tension bar control. Is shifted and reaches the winding linear speed down position PLVwd, it is determined that the winding diameter D has increased from the reference. At this time, the continuous paper take-up device 2 slows down the take-up speed by the interval between the lowermost position of the tension bar control Pcd and the take-up linear speed down position PLVwd (that is, the amount of deviation of the position of the tension bar from the reference). Thus, in the next winding operation, the position of the tension bar after the winding operation is returned from the winding linear speed down position PLVwd to the tension bar control uppermost position Pcu.

  For this reason, the continuous paper winding device 2 can reduce the winding linear speed VLw and increase the winding diameter D of the continuous paper CP on the winding shaft 34, thereby increasing the winding speed corresponding to the rotation speed of the winding shaft 34. Is increased, the rotation speed of the winding shaft 34 can be reduced in accordance with the actual winding speed, so that the tension is prevented from being excessively increased, and the winding quality can be improved.

  Accordingly, the continuous paper take-up device 2 can apply an appropriate tension to the normal continuous paper CP, prevent print extension and paper breakage due to an excessively large tension applied to the continuous paper CP, and improve print quality. Can be improved. At the same time, the continuous paper take-up device 2 has a large diameter D for winding the continuous paper CP on the take-up shaft 34, so that even if the rotation of the take-up shaft 34 is stopped, it is difficult to stop immediately because of inertia. In this case, it is possible to prevent the tension bar 36 from reaching the tension bar operation upper limit position Pmu.

  Further, the continuous paper winding device 2 performs a reference time measurement initial process when a new continuous paper CP winding operation is started, and measures a different reference time t1 depending on the material and thickness of the continuous paper CP. Therefore, the continuous paper take-up device 2 can cope with a change in the printing apparatus linear velocity VLp depending on the type of the continuous paper CP.

  When the tension bar 36 rises from the lowermost position Pcd of the tension bar control and the upper position detection sensor 42U changes from the non-shielding state to the shielding state, the continuous paper winding device 2 determines that the tension bar control has reached the uppermost position Pcu. After that, when the tension bar 36 further rises and the upper position detection sensor 42U changes from the shielded state to the non-shielded state, it is determined that the winding linear speed has reached the winding-down speed position PLVwd. Thus, the continuous paper take-up device 2 detects the take-up linear velocity down position PLVwd by the state transition of the upper position detection sensor 42U. For this reason, the continuous paper take-up device 2 detects the take-up linear speed down position PLVwd without separately providing a take-up linear speed down position PLVwd above the upper position detection sensor 42U. Thus, the number of position detection sensors can be reduced, and the configuration can be simplified.

  According to the above configuration, the continuous paper take-up device 2 includes a tension bar 36 provided on the upstream side of the take-up shaft 34 that takes up the continuous paper CP issued from the printing device 4 and applies tension to the continuous paper CP by its own weight. A position detection sensor 42 for detecting the tension bar 36 at a plurality of detection positions within the movement range of the tension bar 36, and a position detection sensor 42 for detecting the position of the tension bar 36 within a predetermined set time while the winding shaft 34 is rotating. The rotation speed setting unit 22 that reduces the rotation speed of the winding shaft 34 when detected by the sensor 42 and the motor drive unit 24 that rotates the winding shaft 34 at the rotation speed set by the rotation speed setting unit 22. It was provided.

  Thereby, the continuous paper take-up device 2 reduces the rotation speed of the take-up shaft 34 when the take-up diameter D of the continuous paper CP around the take-up shaft 34 increases and the take-up linear speed VLw increases. The tension applied to the continuous paper CP is prevented from becoming too large, and an appropriate tension can be applied to the normal continuous paper CP regardless of the winding diameter D.

[2. Other Embodiments]
In the above-described embodiment, the case where the uppermost position Pcu of the tension bar control and the winding line speed down position PLVwd are detected by one upper position detection sensor 42U has been described. The present invention is not limited to this, and a winding line speed down position detection sensor for detecting the winding line speed down position PLVwd may be separately provided above the upper position detection sensor 42U as the control uppermost position detection sensor.

  Further, in the above-described embodiment, the case has been described in which the reference time measurement initial process is performed when the winding operation of the new continuous paper CP is started to measure the reference time t1. The present invention is not limited to this. For example, when the winding operation is repeatedly performed by using the same type of continuous paper CP, the reference time t1 is not measured each time a new continuous paper CP is started to be wound. A fixed value reference time t1 may be used.

  Further, in the above-described embodiment, the case where the winding shaft 34 is rotated by the DC motor 32 has been described. The present invention is not limited to this, and the winding shaft 34 may be rotated by various driving units such as a pulse motor.

  Furthermore, in the above-described embodiment, a case has been described in which the transmission type photoelectric sensor is used for the lower position detection sensor 42D and the upper position detection sensor 42U. The present invention is not limited to this, and various other types of sensors may be used.

  Further, in the above-described embodiment, the case has been described where the determination unit 18, the detection unit 20, the rotation speed setting unit 22, and the motor drive unit 24, which are the control programs of the microprocessor 10, are stored in the ROM 12. The present invention is not limited to this, and the microprocessor 10, outside the ROM 12, may store the determination unit 18, the detection unit 20, the rotation speed setting unit 22, and the motor drive unit 24.

  Further, in the above-described embodiment, the tension bar 36 as a tension applying unit, the position detection sensor 42 as a position detection sensor, the rotation speed setting unit 22 as a rotation speed setting unit, and the motor driving unit as a motor driving unit The case where the unit 24 constitutes the continuous paper winding device 2 as the continuous paper winding device has been described. The present invention is not limited to this, and a continuous paper winding device may be configured by a tension applying unit having various other configurations, a position detection sensor, a rotation speed setting unit, and a motor driving unit.

  The present invention can be used not only for a computer that causes a printer to print an image, but also for various electronic devices that perform various processes related to images, such as an image scanner, a facsimile machine, and a copying machine.

  1 continuous paper issuing device, 2 continuous paper take-up device, 4 printing device, 10 microprocessor, 12 ROM, 14 RAM, 16 I / O port, 18 judgment Unit, 20 detection unit, 22 rotation speed setting unit, 24 motor drive unit, 30 DC motor control circuit, 32 DC motor, 34 winding shaft, 36 tension bar, 38: tension bar shaft, 40: guide roller, 42: position detection sensor, 42U: upper position detection sensor, 42D: lower position detection sensor, 44: sensor shielding plate, 46: operation panel, 48 ... Switch, CP ... Continuous paper, Rw ... Winding direction, D ... Winding diameter, Dc ... Maximum winding diameter, Dn ... Minimum winding diameter, VLp ... Printing device linear speed, VLw ... … Winding line speed, VLw ...... Maximum winding linear velocity, VLwn ... Minimum winding linear velocity, Pcd ... Lowermost position of tension bar control, Pcu ... Uppermost position of tension bar control, PLVwd ... Lowering winding velocity, Pmd ... Lowermost position of tension bar operation, Pmu... Uppermost position of tension bar operation, h1... Movable range of tension bar winding wire speed down control, h2... Movable range of tension bar control, h3... Sensor shield plate length, h4. ... Tension bar movable range, t1 ... Reference time.

Claims (6)

A tension applying unit that is provided on the upstream side of a winding shaft that winds the continuous paper issued from the printing apparatus and applies tension to the continuous paper;
A position detection sensor that detects the tension applying unit at a plurality of detection positions within a movement range of the tension applying unit;
While the winding shaft is being rotated, when the tension applying unit is detected by the position detection sensor within a predetermined set time, a rotation speed setting unit that reduces the rotation speed of the winding shaft,
Have a motor drive unit for rotating the winding shaft by the rotational speed set by the rotational speed setting unit,
The position detection sensor,
A lower position detection sensor that detects the tension applying unit at the lowermost position of the tension applying unit control;
An upper position detection sensor that detects the tension applying unit at the winding linear speed down position, and the tension applying unit at the uppermost position of the tension applying unit control located below the winding linear speed down position;
Has,
The rotation speed setting unit,
A continuous paper take-up device that reduces the rotation speed of the take-up shaft when the tension applying unit that rises from the lowermost position of the tension applying unit control reaches the winding linear speed down position within the set time . The rotation speed setting unit, when the tension applying unit at the winding linear speed down position is detected by the upper position detection sensor within the set time, controls the winding linear speed down position and the tension applying unit control. The continuous paper take-up device according to claim 1 , wherein the rotation speed of the take-up shaft is reduced by the rotation speed according to an interval from an upper position. The upper position detection sensor is a single sensor, and the rotation speed setting unit is:
When the upper position detection sensor detects the rising tension applying section, it is determined that the tension applying section is at the uppermost position of the tension applying section control, and thereafter, the upper position detection of the rising tension applying section is performed. when the sensor no longer detects the continuous paper winding device, wherein the tension applying section to claim 1 determines that in the winding linear velocity down position. The upper position detection sensor,
A take-up linear speed down position detection sensor that detects the tension applying section at the take-up linear speed down position,
The continuous paper take-up device according to claim 1 , further comprising: a control uppermost position detection sensor that detects the tension applying unit at the uppermost position of the tension applying unit control. The continuous paper take-up device according to claim 1 , further comprising: a control unit that measures the set time when performing the first take-up operation of the continuous paper and applies the set time to a subsequent take-up operation. The continuous paper take-up device according to claim 5 , wherein the control unit measures the set time for each type of the continuous paper.

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