JP2013107259A - Printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress fluctuation of a cutting time by a cutter having a rotating blade which moves in a width direction of recording paper.SOLUTION: Standby position sensors 18a, 18b for detecting a standby position of the rotating blade 11 are arranged on both right and left sides on an outer side of the width direction of the recording paper. An intermediate position sensor 19 for detecting a moving position of the rotating blade 11 is arranged in the middle of these standby position sensors 18a, 18b. A halfway moving time T from when the rotating blade 11 cutting the recording paper is detected by either of the standby position sensors 18a, 18b until when it is detected by the intermediate position sensor 19 is measured. Based on deviation from a reference value Tof the measured halfway moving time T, a moving speed of the rotating blade 11 after detected by the intermediate position sensor 19 is controlled so as to suppress the fluctuation of the entire moving time of the rotating blade 11. Thereby, the fluctuation of the cutting time by the cutter 10 having the rotating blade 11 moving in the width direction of the recording paper can be suppressed.

Description

  The present invention relates to a printer including a cutter in which one of cutting blades that cooperate is a rotary blade that moves in the width direction of a recording sheet.

  Printers such as thermal printers, inkjet printers, and laser printers have a cutter that cuts printed recording paper into a predetermined length, and one of the cutting blades that cooperates with this cutter moves in the width direction of the recording paper. (For example, refer to Patent Documents 1-3). In the one described in Patent Documents 1-3, the other cutting blade is a fixed blade that extends in the width direction of the recording paper, and the carriage that rotatably supports the rotating blade is moved in the width direction of the recording paper to perform printing. The recorded recording paper is cut into a predetermined length.

  The cutter having the moving rotary blade engages a carriage that supports the rotary blade with a timing belt wound around a pulley, and rotates one of the pulleys in the forward and reverse directions by a motor. Many of them are moved back and forth in the width direction of the recording paper (see, for example, Patent Document 1). There is also a type in which the rotary blade is reciprocated in the width direction of the recording paper by engaging the carriage of the rotary blade with a spiral shaft provided with a spiral groove and rotating the spiral shaft in the forward and reverse directions with a motor (for example, , See Patent Document 2).

  In this type of cutter, the rotary blade is placed on standby at one end on the outer side in the width direction of the recording paper, and the recording paper is stopped at a predetermined cutting position, and the rotary blade is moved to the other end in the width direction for recording. Cut the paper, let the rotary blade moved to the other end side stand by on the outside in the width direction of the recording paper, and at the next cutting position, move the rotary blade from the other end side to the one end side in the reverse direction, Many papers are cut.

JP 2000-317884 A JP 2002-29109 A JP 2003-191549 A

  The cutter having a rotary blade that moves in the width direction of the recording paper described in Patent Documents 1-3 has a long moving distance of the rotary blade, so that there is a difference in cutting resistance due to the thickness and quality of the recording paper, There is a problem that the cutting time of the recording paper varies more greatly than other types of cutters such as a guillotine type and a rotary type due to a change in feed resistance of the rotary blade. If the cutting time of the recording paper fluctuates in this way, it also hinders printing and paper feeding performed between each cutting.

  Accordingly, an object of the present invention is to suppress fluctuations in cutting time in a cutter having a rotary blade that moves in the width direction of the recording paper.

  In order to solve the above-described problems, the present invention includes a cutter that cuts a printed recording paper into a predetermined length, and at least one of the cutting blades that cooperate with the cutter is disposed outside the recording paper in the width direction. In the printer having a rotary blade that waits in the width direction of the recording paper, a standby position sensor that detects the standby position of the rotary blade is arranged on both the left and right sides outside the width of the recording paper. At least one intermediate position sensor for detecting the moving position of the rotary blade is arranged between the standby position sensors on both sides, and the rotary blade for cutting the recording paper is detected by any one of the standby position sensors. Is measured by the one standby position sensor based on the deviation of the intermediate movement time from a preset reference value. So as to suppress the fluctuation of the entire Time to be detected in the other standby position sensor from being adopted a configuration for controlling the moving speed of the rotary blade after detected by the intermediate position sensor.

  That is, standby position sensors that detect the standby position of the rotary blade are arranged on both the left and right sides outside the width direction of the recording paper, and at least one intermediate position that detects the moving position of the rotary blade is located between these standby position sensors. The sensor is arranged to measure the halfway movement time from when the rotary blade for cutting the recording paper is detected by one of the standby position sensors until it is detected by one intermediate position sensor, and this measured halfway movement Based on the deviation of the time from the preset reference value, the fluctuation of the entire movement time from when the rotary blade is detected by one standby position sensor until it is detected by the other standby position sensor is suppressed. By controlling the moving speed of the rotary blade after detection by the intermediate position sensor, it is possible to suppress fluctuations in the cutting time in the cutter having the rotary blade moving in the width direction of the recording paper.

  By disposing the at least one intermediate position sensor symmetrically with respect to the central position between the left and right standby position sensors, the moving speed of the rotary blade is independent of the left and right moving directions of the rotary blade during cutting. The distance for controlling can be made constant. When an odd number of intermediate position sensors including one case is arranged, one intermediate position sensor can be arranged at the center position, and the remaining intermediate position sensors can be arranged symmetrically on both sides. Further, when an even number of intermediate position sensors are arranged, they can be arranged symmetrically with respect to the center position.

  In the printer according to the present invention, standby position sensors for detecting the standby position of the rotary blade are arranged on both the left and right sides of the recording paper in the width direction, and the moving position of the rotary blade is detected between these standby position sensors. At least one intermediate position sensor is arranged to measure a halfway movement time from when the rotating blade for cutting the recording paper is detected by one of the standby position sensors until it is detected by one intermediate position sensor. Based on the deviation of the measured midway travel time from a preset reference value, the fluctuation of the overall travel time from when the rotary blade is detected by one standby position sensor until it is detected by the other standby position sensor Since the moving speed of the rotary blade after detection is controlled by the intermediate position sensor, the fluctuation of the cutting time in the cutter having the rotary blade moving in the width direction of the recording paper is suppressed. Door can be.

Cutaway longitudinal sectional view showing an embodiment of a printer (A) is the front view which shows the cutter of FIG. 1, (b) is the rear view of (a). Side view of FIG. Sectional view along line IV-IV in Fig. 2 (a) Control flowchart for controlling the operation of the cutter of FIG. Rear view showing a modification of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. This printer is a thermal printer, and as shown in FIG. 1, a reel 1 for loading a recording paper S of a roll paper into a paper feeding unit, a pressing roller 2 for pressing the outer periphery of the recording paper S, and a leading end of the roll paper 11 A loading roller 3a and a loading pinch roller 3b that are fed out from the reel 1 while sandwiching the sheet, a feed roller 4 that feeds the recording paper S to the printing unit, a pinch roller 5 that presses the recording paper S against the feed roller 4, and a pair of bobbins 6a A wound ink ribbon 6, a thermal head 7 for printing on the recording paper S, a platen roller 8 facing the thermal head 7, and a cutter 10 for cutting the printed recording paper S into a predetermined length. Basically configured, the cut recording paper S is discharged to the outside from a paper discharge port 9 a provided on the front surface of the casing 9. Although not shown, the printer includes a controller that controls the operation of each unit. This controller also controls the operation of the cutter 10 described later.

  As shown in FIGS. 2A, 2B and 3, the cutter 10 is a rotary blade 11 whose upper cutting blade moves in the width direction of the recording paper S, and its lower cutting blade is the width of the recording paper S. The fixed blade 12 extends in the direction. The rotary blade 11 is rotatably supported by a carriage 14 guided in the width direction on the front side of the upper frame 13a. The carriage 14 is locked to a timing belt 16 wound around a driving pulley 15a and a plurality of driven pulleys 15b. The rotary blade 11 supported by the carriage 14 reciprocates in the width direction of the recording paper S by rotating the drive pulley 15a in the forward and reverse directions by the DC motor 17 attached to the lower frame 13b. The fixed blade 12 is fixed to the front side of the lower frame 13b so as to cooperate with the rotary blade 11, and the upper and lower frames 13a, 13b extending in the width direction are connected at both ends.

  On the back side of the upper frame 13a, standby position sensors 18a and 18b for detecting the standby position of the rotary blade 11 are attached on the left and right sides outside the width direction of the recording paper S, and the standby position sensors 18a and 18b One intermediate position sensor 19 for detecting the moving position of the rotary blade 11 is attached to the intermediate center position. The rotary blade 11 moves rightward from the standby position detected by the standby position sensor 18a on the left side (right side in the rear view of FIG. 2B) in one cut, and cuts the recording paper S as it is. The standby position is detected at the standby position detected by the standby position sensor 18b, and in the next cutting, the recording paper S is cut by moving leftward.

  As shown in FIG. 4, the carriage 14 is provided with a position detection plate 20 that protrudes toward the back side of the upper frame 13 a, and the position detection plate 20 is a light emitting portion 19 a and a light receiving portion of an optical intermediate position sensor 19. The moving position of the carriage 14, that is, the rotary blade 11 is detected by blocking the space 19 b. Although not shown, the standby position sensors 18 a and 18 b are also of the same optical type as the intermediate position sensor 19. Each of these position sensors may be another type of sensor such as a magnetic type or a contact type.

  Upper and lower paper guides 21a and 21b for guiding the recording paper S are attached to the upper and lower frames 13a and 13b, respectively, and the recording paper S is guided between the rotary blade 11 and the fixed blade 12 from the back side. . The upper paper guide 21a is provided with a rising portion 22 that rises on the front side. The carriage 14 includes a base portion 14 a guided by sliding portions 23 a and 23 b between the upper frame 13 a and the rising portion 22, and a blade support portion 14 b projecting to the front side of the rising portion 22. The rotary blade 11 is rotatably supported. Further, a belt locking tool 24 for locking the timing belt 16 is incorporated in the base portion 14a, and a position detection plate 20 is provided on the belt locking tool 24.

  Hereinafter, the control of the operation of the cutter 10 by the controller will be described. The controller includes a timer and performs PMW (Pulse Width Modulation) control of the DC motor 17 based on detection outputs of the standby position sensors 18a and 18b and the intermediate position sensor 19. The PMW control is to control the duty (driving time rate) by changing the pulse width of a constant cycle for driving the motor.

FIG. 5 is a control flowchart for cutting the recording paper S by moving the rotary blade 11 to the right from the left standby position. In the controller, a reference value T ₀ of the midway movement time T until the rotary blade 11 is detected by the intermediate position sensor 19 from the left standby position at the time of cutting is preset. First, the controller drives the DC motor 17 to rotate forward with a duty of 100% based on the cut operation command. Next, the rotary blade 11 measures the middle movement time T until detected by the intermediate position sensor 19 is detected by the left standby position sensor 18a, the reference value T ₀ the measured midway movement time T Based on the deviation time ΔT, the duty of the DC motor 17 that controls the moving speed of the rotary blade 11 after being detected by the intermediate position sensor 19 is determined. In this embodiment, determines the reference duty after detecting the intermediate position sensor 19, raised than the reference duty duty when abruptly moving time T is larger than the reference value T _0, is smaller than the reference value T ₀ is the duty Is made lower than the reference duty. After that, the controller normally drives the DC motor 17 with the determined duty. Finally, when the rotary blade 11 is detected by the right standby position sensor 18b, the DC motor 17 is braked so that the rotary blade 11 is moved. Stop and complete one cut. Although illustration is omitted, even when cutting is performed by moving the rotary blade 11 from the right standby position to the left, the control flow is the same as the DC motor 17 is reversely driven.

Standard recording sheet S ₀ of the same width, _{respectively,} a recording sheet larger recording sheet S ₁ of the cut resistance than S _0, and the recording sheet S ₀ also available a small recording sheet S ₂ having cut resistance than the control shown in FIG. 5 As shown in the flowchart, the cutter 10 was controlled when the rotary blade 11 was cut by moving it from the left standby position to the right. In any case, the duty of the DC motor 17 in the first half stroke until the rotary blade 11 is detected by the center intermediate position sensor 19 is 100%. The intermediate movement time T of each recording paper S ₁ and S ₂ is measured with the intermediate movement time 0.10 second of the recording paper S ₀ at this time as the reference value T ₀ , and the intermediate position sensor is based on the deviation time ΔT. the duty of the DC motor 17 in the second half stroke after detection at 19, the remaining traveling time at the latter half stage is controlled to be the same as the standard of the recording sheet S _0. Reference duty in the second half stroke of the recording sheet S ₀ was 50%.

Table 1 shows the control results. In the recording paper S _{1 having} a large cutting resistance, the midway moving time T is 0.15 seconds, which is longer than that of the recording paper S _0, and the duty in the second half process is increased to 75%, which is faster than the moving speed at the reference duty. is, remaining travel time in the second half stroke has the same 0.20 seconds with the standard of the recording sheet s _0. In the recording paper S _{2 having} a small cutting resistance, the midway movement time T is 0.08 seconds, which is shorter than that of the recording paper S ₀ , the duty in the second half stroke is reduced to 40%, and the remaining movement time in the second half stroke is standard. has become of the recording sheet _{s 0} with the same 0.20 seconds.

  From these control results, it can be seen that fluctuations in the overall movement time of the rotary blade 11 during cutting can be suppressed when the cutting resistance of the recording paper changes. In the above-described embodiment, the remaining movement time in the second half stroke is controlled to be constant. However, the overall movement time is made constant after limiting the duty in the second half stroke so as not to become too high. You may control as follows. This is because if the duty in the second half stroke is too high, it becomes difficult to control the stop position of the rotary blade.

  FIG. 6 shows a modification of the arrangement of the intermediate position sensor 19 shown in FIG. In this modification, two intermediate position sensors 19 are arranged at positions symmetrical with respect to the center position between the standby position sensors 18a and 18b on both sides. Each intermediate position sensor 19 is arranged inside the width of the recording sheet S to be printed, so that a part of the recording sheet S can be cut by the midway moving time T and the difference in cutting resistance can be detected. It has become. Either intermediate position sensor 19 may be used for each movement of the rotary blade 11 in the left-right direction. However, the intermediate position sensor 19 on the movement start side is lengthened so as to lengthen the stroke on the second half side for controlling the duty. Is preferably used. Note that each intermediate position sensor 19 may be disposed outside the width of the recording paper S in order to cope with a change in the feeding resistance of the mechanical rotary blade.

  In the embodiment described above, the upper cutting blade of the cutter is a rotary blade and the lower cutting blade is a fixed blade. Conversely, the upper cutting blade can be a fixed blade and the lower cutting blade can be a rotary blade. It can also be a rotating blade. In addition, the cutting is performed when the rotary blade moves in both the left and right directions. However, the rotary blade moved for each cutting may be returned to the original position, and the cutting may be performed only when the rotary blade moves in one direction. .

  In the embodiment and the modification described above, the number of intermediate position sensors is one and two. However, three or more intermediate position sensors may be arranged and used depending on the width of the recording paper. .

  In the above-described embodiment, the thermal printer is used. However, the printer according to the present invention can be applied to other printers such as an ink jet printer and a laser printer.

S Recording Paper 1 Reel 2 Pressing Roller 3a Loading Roller 3b Loading Pinch Roller 4 Feed Roller 5 Pinch Roller 6 Ink Ribbon 6a Bobbin 7 Thermal Head 8 Platen Roller 9 Casing 9a Discharge Port 10 Cutter 11 Rotating Blade 12 Fixed Blades 13a, 13b Frame 14 Carriage 14a Base 14b Blade support 15a, 15b Pulley 16 Timing belt 17 DC motor 18a, 18b Standby position sensor 19 Intermediate position sensor 19a Light emitting part 19b Light receiving part 20 Position detection plates 21a, 21b Paper guide 22 Rising parts 23a, 23b Sliding Moving part 24 Belt lock

Claims (2)

  Rotation that includes a cutter that cuts a printed recording paper to a predetermined length, waits at least one of the cutting blades that cooperate with the cutter outside in the width direction of the recording paper, and moves in the width direction of the recording paper In the printer using the blade, standby position sensors for detecting the standby position of the rotary blade are arranged on both the left and right sides outside the recording paper in the width direction, and the rotary blade is positioned between the standby position sensors on both the left and right sides. At least one intermediate position sensor for detecting the movement position is arranged, and from when the rotary blade for cutting the recording paper is detected by any one of the standby position sensors until it is detected by one of the intermediate position sensors A midway movement time is measured, and based on a deviation of the measured halfway movement time from a preset reference value, the other standby position sensor is detected after the rotary blade is detected by the one standby position sensor. So as to suppress the movement of the time variation of the whole to be detected by the sub printer being characterized in that so as to control the moving speed of the rotary blade after detected by the intermediate position sensor.   The printer according to claim 1, wherein the at least one intermediate position sensor is arranged symmetrically with respect to a center position between the left and right standby position sensors.

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