JP2015139935A - Recording device and control method of recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively use the vicinity of a terminal end of a recording medium, in a recording medium which conveys the recorded recording medium to a cut position and then performs back-feeding.SOLUTION: A printer 10 conveys a recording medium by a plurality of conveyance rollers 23, 24 arranged in a conveyance path of a recording medium and performs recording on the recording medium by a recording head 20. Furthermore, the recording medium after recording is conveyed to a cut position provided on the downstream of the recording head 20, and the remaining recording medium after cutting is conveyed to the position of the recording head 20 reversely. When the recording medium comes off from the conveyance roller 23 on the upstream side during conveyance to the cut position, collision prevention means is validated for preventing collision between the recording medium and the conveyance roller 23 when the recording medium is conveyed reversely.

Description

  The present invention relates to a recording apparatus and a control method for the recording apparatus.

  2. Description of the Related Art Conventionally, in an apparatus for recording by recording a recording medium such as paper with a plurality of transport rollers, one having a function of back feeding after transporting the recording medium after recording is known (for example, Patent Document 1). reference). This function is a function for moving and cutting the recording medium to the position of the cutter downstream from the recording head when the recording medium is continuous paper. That is, when the recording medium is conveyed to the position of the cutter, the recording medium is fed out without being recorded. If the next recording is performed without winding up the unrecorded portion, the unrecorded portion remains as a large blank portion, so that the blank portion is prevented from being generated by back-feeding. Also, as described in Patent Document 1, when a perforation is provided at the page break position of the recording medium, the print start position of the next page is shifted unless back feed is performed after cutting at the perforation. End up.

JP 2012-232549 A

However, when the end of the recording medium is close, when the recording medium is conveyed to the cutter position, the end of the recording medium comes off the upstream roller. In this case, when the back feed is performed, the end of the recording medium removed from the roller may come into contact with the roller again, and the recording medium may be clogged. For this reason, the portion near the end of the recording medium is not recorded but discarded.
The present invention has been made in view of the above-described circumstances, and enables a recording apparatus that transports a recorded recording medium to a cut position and then back-feeds the recording medium so that the vicinity of the end of the recording medium can be used effectively. With the goal.

In order to achieve the above object, the recording apparatus of the present invention is provided with a plurality of transport rollers arranged in a transport path of the recording medium, a recording head for recording on the recording medium, and the continuous sheet-shaped recording medium. When the recording side is the upstream side and the discharging side is the downstream side, the recording medium after recording is transported to the cutting position by the cut position provided downstream of the recording head in the transport path and the transport roller. And a controller that transports the remaining cut recording medium in a reverse direction to the position of the recording head, and the controller is configured to perform recording from the upstream transport roller during transport to the cut position. Enabling a collision preventing means for preventing a collision between the recording medium and the upstream conveying roller when the recording medium is transported in the opposite direction when the medium is detached; And features.
According to the present invention, when the recording medium is conveyed in the reverse direction from the cut position, the end of the recording medium does not collide with the upstream roller, so that the recording medium is reversed without causing the recording medium to be clogged. Can be transported. Therefore, recording can be performed near the end of the recording medium.

According to the present invention, in the recording apparatus, the recording head performs recording on the recording medium in units of pages, and the control unit conveys a page boundary of the recording medium after recording to the cut position by the conveyance roller. The remaining cut recording medium is transported in the reverse direction to the position of the recording head, and when the remaining cut recording medium is the last page, the collision preventing means is in use. It is characterized by.
According to the present invention, when recording is performed on a recording medium in units of pages, even the final page can be conveyed and recorded in the reverse direction to the position of the recording head.

According to the present invention, in the recording apparatus, the recording head is disposed so as to face a platen disposed in the conveyance path, and the control unit uses the leading end surface of the recording head as the collision preventing unit. A function of moving in a direction orthogonal to the transport path is executed.
According to the present invention, the recording head facing the platen is moved on the recording medium, so that the lifting of the recording medium can be suppressed, and the collision between the conveyance roller and the recording medium can be avoided.

The present invention is characterized in that, in the recording apparatus, the control unit executes a function of releasing a nip of the upstream conveying roller as the collision preventing unit.
According to the present invention, it is possible to avoid a collision between the conveyance roller and the recording medium by releasing the nip of the conveyance roller.

In the recording apparatus according to the aspect of the invention, the control unit may start the conveyance of the remaining cut recording medium in the reverse direction until the end of the recording medium reaches the upstream conveyance roller. And executing the function.
According to the present invention, since the collision preventing means is made effective before the recording medium collides with the transport roller, the collision can be prevented more reliably.

According to the present invention, in the recording apparatus, when the length of the remaining cut recording medium is shorter than a predetermined length, the control unit discharges the recording medium without conveying it in the reverse direction. It is characterized by.
According to the present invention, when the remaining cut recording medium is too short to be suitable for reverse conveyance, the recording medium can be discharged to prevent the recording medium from being clogged.

In the recording apparatus, the recording apparatus includes a detection unit that detects the recording medium at a plurality of positions on the conveyance path, and the control unit is configured to record the recording medium at the plurality of positions by the detection unit during conveyance of the recording medium. It is characterized in that it is determined that an error has occurred when the medium is no longer detected.
According to the present invention, it is possible to quickly cope with an abnormality such as the length of a recording medium.

The present invention is characterized in that, in the recording apparatus, the control unit retracts the recording head to a position that does not overlap a side edge of the recording medium during conveyance of the recording medium.
According to the present invention, it is possible to prevent problems such as the recording head being caught by the recording medium during conveyance of the recording medium. For example, it is more effective when the recording medium is a thick recording medium such as copy paper or when a staple of a stapler is attached to the recording medium.

In order to achieve the above object, a control method for a recording apparatus according to the present invention includes: transporting the recording medium by a plurality of transport rollers arranged in a transport path of the recording medium; and recording on the recording medium by a recording head. When the continuous sheet-like recording medium supply side is the upstream side and the discharge side is the downstream side, the recording medium after recording reaches the cut position provided downstream of the recording head in the conveyance path. When the recording medium is transported and transported in the reverse direction to the position of the recording head, and the recording medium is removed from the upstream transport roller during transport to the cut position, It is characterized in that a collision preventing means for preventing a collision between the recording medium and the upstream conveying roller when the recording medium is conveyed in the opposite direction is made effective.
According to the present invention, when the recording medium is conveyed in the reverse direction from the cut position, the end of the recording medium does not collide with the upstream roller, so that the recording medium is reversed without causing the recording medium to be clogged. Can be transported. Therefore, recording can be performed near the end of the recording medium.

  According to the present invention, since the recording medium can be transported in the reverse direction without causing the recording medium to be jammed, recording can be performed near the end of the recording medium.

FIG. 2 is a cross-sectional view of a main part of the printer according to the embodiment. It is a perspective view of a printer. FIG. 2 is a block diagram illustrating a configuration of a printer control system. FIG. 6 is an explanatory diagram of an operation of a printer. FIG. 6 is an explanatory diagram of an operation of a printer. 3 is a flowchart illustrating an operation of a printer. 3 is a flowchart illustrating an operation of a printer.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a side sectional view of a printer 10 according to an embodiment of a recording apparatus of the present invention, and FIG. 2 is a perspective view showing a frame configuration of the printer 10.
The printer 10 includes a recording head 20 that selectively ejects a plurality of recording wires, and a carriage 21 on which the recording head 20 is mounted. The printer 10 is a serial dot impact printer that records (prints) characters, images, symbols, and the like by hitting a recording wire from the recording head 20 to a recording medium. 1 including the printer main body 12 and the tractor 30 are accommodated in a case (not shown) of the printer 10 in the installed state and the used state.

The recording medium recorded by the printer 10 is a sheet of paper or synthetic resin, and includes a cut sheet cut to a predetermined length and a continuous sheet in which a plurality of sheets are connected. The cut sheet is, for example, cut sheet paper, copy paper, a passbook, or a cut film. The continuous sheet is roll paper, fanfold paper, or the like. As the fanfold paper, for example, paper having sprocket holes formed at the side ends can be used, and copy paper can be used in addition to plain paper.
The printer 10 includes a printer main body 12 constituting a recording unit, and a tractor 30 is disposed on the rear side of the printer main body 12. In FIG. 1, the left side in the drawing is the front (front) side of the printer 10, and the right side in the drawing is the rear (rear) side of the printer 10.
When a continuous sheet is used in the printer 10, the continuous sheet is supplied from the rear of the printer main body 12 to the recording head 20 by the tractor 30, recorded by the recording head 20, and discharged forward from the front portion of the printer main body 12. Here, the conveyance direction when the recording medium is conveyed from the rear to the front is defined as a positive direction, and is indicated by a reference numeral FW in the drawing. In addition, the direction in which the recording medium is conveyed in the reverse direction of the forward direction FW is the reverse direction, and is denoted by reference numeral RE in the drawing. When recording on a continuous sheet, the side on which the continuous sheet is supplied (right side in FIG. 1) is upstream, and the side on which the continuous sheet is discharged (left side in FIG. 1) is downstream.
When recording a cut sheet with the printer 10, the cut sheet is manually fed from the front of the printer body 12. The printer 10 performs recording by conveying the manually fed cut sheet to the recording head 20 in the reverse direction RE, and conveys and discharges the cut sheet after recording in the forward direction FW. In the printer 10, a cut sheet conveyance path that is manually fed from the front side and a conveyance path that conveys a continuous sheet supplied by the tractor 30 are linearly laid out.
In the following description, a case where the printer 10 performs recording on the recording medium 60 (FIG. 5) that is a continuous sheet will be described as an example. The recording medium 60 is fanfold paper, and the printer 10 records on the recording medium 60 in units of pages.

  In FIG. 1, reference numeral 62 denotes a conveyance path through which the recording medium 60 is conveyed in the printer 10. The conveyance path 62 is a substantially planar path from a pair of left and right tractors 30, 30 attached to the rear side of the printer main body 12, directly under the recording head 20, and to the front of the printer main body 12.

  The printer body 12 includes a pair of left and right side frames (a left side frame 25 and a right side frame 26), and a back frame 27 is bridged between the side frames 25 and 26 to constitute a body frame. Between the side frames 25 and 26, a platen 22, a carriage shaft 28, shafts of the first transport roller 23 and the second transport roller 24, and a pulley shaft of the tractor 30, which will be described later, are bridged.

The printer main body 12 includes a recording head 20 as a recording mechanism unit, a carriage 21, and a platen 22. The carriage 21 carries the recording head 20 and is inserted through the carriage shaft 28. A timing belt 48 is attached to the carriage 21, and the timing belt 48 is driven by a carriage drive motor 46 (FIG. 3). Therefore, when the carriage drive motor 46 rotates in the forward direction and the reverse direction, the carriage 21 reciprocates along the carriage shaft 28 and scans the recording head 20. The scanning direction of the recording head 20 is indicated by the symbol W in FIG. The scanning direction W is a direction orthogonal to the forward direction FW and the reverse direction RE, which are conveyance directions of the recording medium 60, and is the width direction of the recording medium 60.
A platen 22 is disposed immediately below the recording head 20. The platen 22 is a so-called flat platen having a flat surface facing the protruding surface from which the recording wire protrudes from the recording head 20. The platen 22 is urged upward by an urging unit such as a spring, and receives the output of the recording wire protruding from the recording head 20.

A stationary type ink ribbon cartridge 29 is detachably attached to the printer main body 12. The ink ribbon of the ink ribbon cartridge 29 is fed between the recording head 20 and the platen 22.
While the recording head 20 travels in the scanning direction W together with the carriage 21, the recording wire protrudes and strikes the ink ribbon, and the ink on the ink ribbon is conveyed between the platen 22 and the recording head 20. Adhere to the medium 60. Thereby, characters, symbols, images, etc. are recorded on the recording medium 60. A ribbon mask holder 51 that protects the recording medium 60 conveyed from the ink ribbon in the ink ribbon cartridge 29 in contact with the upper surface of the platen 22 is mounted on the carriage 21.

The printer main body 12 includes a first conveyance roller 23 and a second conveyance roller 24 as a sheet conveyance mechanism unit. The 1st conveyance roller 23 is provided with the 1st drive roller 23a arrange | positioned on the conveyance path | route 62, and the 1st driven roller 23b which is located under the conveyance path | route 62 and opposes the 1st drive roller 23a. The shaft of the first drive roller 23 a is connected to the transport motor 40 (FIG. 3) via a drive wheel train portion 41 disposed on the right side frame 26. For this reason, the first drive roller 23 a is driven by the transport motor 40. The first driven roller 23b is a driven roller that follows the rotation of the first drive roller 23a.
The second transport roller 24 includes a second drive roller 24a positioned below the transport path 62 and a second driven roller 24b positioned above the transport path 62 and facing the second drive roller 24a. The shaft of the second drive roller 24 a is connected to the transport motor 40 via the drive wheel train 41. For this reason, the second drive roller 24 a is driven by the transport motor 40. The second driven roller 24b is a driven roller that follows the rotation of the second drive roller 24a. The shafts of the first driving roller 23a, the first driven roller 23b, the second driving roller 24a, and the second driven roller 24b are bridged between the side frames 25 and 26.

The first transport roller 23 is located on the upstream side of the recording head 20 and the second transport roller 24 is located on the downstream side of the recording head 20 with respect to the positive direction FW. Specifically, the first transport roller 23 is positioned between the recording head 20 and the tractor 30, holds the recording medium 60 sent out from the tractor 30, and sends it out toward the recording head 20. The second transport roller 24 is located between the recording head 20 and a paper discharge port formed on the front surface of the printer body 12 and discharges the recording medium 60 after recording recorded by the recording head 20. .
A cutter 53 is disposed in a paper discharge port formed on the front surface of the printer main body 12. The cutter 53 has a downward fixed blade that faces the conveyance path 62. When the user pulls the recording medium 60 discharged from the paper discharge port upward, the recording medium 60 hits the blade of the cutter 53 and is cut.

  Between the first transport roller 23, the recording head 20, the second transport roller 24, and the cutter 53, the transport path 62 is a straight path that is substantially flat and has no left-right movement. In other words, the printer 10 is a flatbed printer.

  Two tractors 30 are attached to the rear portion of the printer main body 12 in the width direction of the recording medium 60. The tractor 30 has a drive shaft connected to the transport motor 40 via a drive wheel train 41, and a tractor drive pulley 30a is fitted to the drive shaft. A tractor belt 31 is hung on the tractor drive pulley 30a, and the tractor belt 31 is driven by the rotation of the tractor drive pulley 30a. The tractor belt 31 is provided with a plurality of pins 30 c that engage with sprocket holes formed in the side end of the recording medium 60. When the tractor driving pulley 30 a drives the tractor belt 31, the pin 30 c conveys the recording medium 60. The tractor 30 has a tractor driven pulley 30b that engages with the tractor belt 31 together with the tractor driving pulley 30a. The tractor belt 31 operates linearly between the tractor driving pulley 30a and the tractor driven pulley 30b. The pair of left and right tractors 30 are fixed at positions corresponding to the width of the recording medium 60, respectively, and apply conveying force to both side ends of the recording medium 60. Moreover, the tractor drive pulley 30a and the tractor driven pulley 30b of the pair of tractors 30 are respectively inserted through common shafts.

  In the printer 10 configured in this manner, while the recording head 20 is moved in the scanning direction W by the carriage 21, recording for one line is performed by ejecting a recording wire from the recording head 20. Each time one line is recorded by the recording head 20, the first transport roller 23, the second transport roller 24, and the tractor 30 transport the recording medium 60 for a predetermined length, and these operations are repeated. Further, before the recording head 20 starts recording, the recording medium 60 set on the tractor 30 is conveyed to the recording position of the recording head 20 by the tractor 30 and the second conveying roller 24. The recording medium 60 after recording is conveyed to the cutting position of the cutter 53 by the second conveying roller 24 as described above.

Further, paper detection sensors 42 and 44 (detection units) for detecting the recording medium 60 are arranged in the conveyance path 62. The paper detection sensor 42 detects the recording medium 60 at the nip position of the first transport roller 23. The paper detection sensor 44 detects the recording medium 60 between the nip position of the second transport roller 24 and the cutter 53.
The paper detection sensors 42 and 44 may have any configuration as long as they can output detection values corresponding to the presence or absence of the recording medium 60. In the present embodiment, the paper detection sensor 42 is a switch type sensor having a lever, and the paper detection sensor 44 is a light transmission type sensor. That is, the paper detection sensor 42 is a switch that includes a lever that hits the recording medium 60 and swings in the direction indicated by S in FIG. 4 and is turned on / off when the lever reaches a predetermined rotation position. The lever of the paper detection sensor 42 is configured so that the tip of the recording medium 60 conveyed in the forward direction FW from the tractor 30 side contacts the tip of the recording medium 60 conveyed in the reverse direction RE from the recording head 20 side. It is substantially V-shaped so that it can be rotated in any case. The paper detection sensor 44 includes a light emitting unit and a light receiving unit that are provided opposite to each other with the conveyance path 62 interposed therebetween, and detects the recording medium 60 based on the amount of light received by the light receiving unit.

FIG. 3 is a block diagram illustrating the configuration of the control system of the printer 10.
The printer 10 includes a control unit 101 that controls each unit of the printer 10. The control unit 101 executes a program stored in the storage unit 102 to execute initialization at the time of activation of each unit of the printer 10, printing operation, error detection, and the like.
An operation panel 115 is connected to the control unit 101. The operation panel 115 is disposed on the exterior of the main body of the printer 10 and includes a switch and an LED indicator. The control unit 101 detects an operation of a switch on the operation panel 115. In addition, the control unit 101 controls lighting and blinking of the LED of the operation panel 115 according to the operation state of the printer 10.

Paper detection sensors 42 and 44 are connected to the control unit 101, and the control unit 101 can acquire detection states of the paper detection sensors 42 and 44, respectively. Here, a sensor driving circuit that supplies an operating current to the paper detection sensors 42 and 44 may be provided between the control unit 101 and the paper detection sensors 42 and 44.
In addition, a head drive unit 111 is connected to the control unit 101. The head drive unit 111 outputs a drive current to a solenoid coil (not shown) included in the recording head 20 according to the control of the control unit 101. Thereby, a plurality of recording wires mounted on the recording head 20 are selectively launched.

  A motor driving unit 112 is connected to the control unit 101. The motor drive unit 112 operates each of the transport motor 40 and the carriage drive motor 46 according to the control of the recording head 20. The transport motor 40 and the carriage drive motor 46 may be stepping motors or DC servo motors. The motor driving unit 112 outputs a driving pulse and a driving current to the stepping motor, and rotates the stepping motor by the number of steps specified by the control unit 101. In addition, the motor driving unit 112 outputs a driving current to the servo motor and rotates the servo motor in the direction specified by the control unit 101.

  The control unit 101 operates the printer 10 according to the operation of the switch on the operation panel 115. The control unit 101 controls each of the above units to drive the transport motor 40 to transport the recording medium 60 and drive the carriage drive motor 46 and the recording head 20 to execute recording. Further, the control unit 101 detects “out of paper” where the recording medium 60 runs out and “paper jam” where the recording medium 60 is jammed based on the detection values of the paper detection sensors 42 and 44.

The controller 101 can execute a tear-off operation and a tear-off return operation when recording on the recording medium 60. Hereinafter, these operations will be described.
4 and 5 are explanatory diagrams showing the operation of the printer 10, and schematically showing the positional relationship of the main parts related to the conveyance of the recording medium 60. 4 and 5 are schematic diagrams. As shown in FIG. 4, the tractor 30, the first transport roller 23, the recording head 20, the second transport roller 24, and the cutter 53 of the printer 10 are arranged substantially linearly. The conveyance path 62 is a straight path along this arrangement. 4 shows a state during recording of the recording medium 60, and FIG. 5 shows a state where the end of the recording medium 60 enters the printer main body 12.
For convenience of explanation, the nip position of the first conveyance roller 23 is P1, the recording position of the recording head 20 is P2, the nip position of the second conveyance roller 24 is P3, and the detection position of the paper detection sensor 44 is the detection position. Let P4, and let the cutting position of the cutter 53 be P5. In the present embodiment, since the detection position of the paper detection sensor 42 substantially coincides with the nip position P1, the nip position P1 is regarded as the same position as the detection position.
Further, the recording medium 60 of the present embodiment is fanfold paper, and perforations 61 are formed at page break positions as shown in FIG. The perforation 61 extends in the width direction of the recording medium 60 and can be easily cut when a pulling force is applied to the perforation 61.

The control unit 101 controls the head driving unit 111 and the motor driving unit 112 to record characters and images for one page at a preset recording position between the perforations 61 of the recording medium 60. To do. After performing the recording for one page, the control unit 101 conveys the recorded page in the forward direction FW until the perforation 61 on the terminal end side (the tractor 30 side) reaches the cutting position P5 of the cutter 53. Here, the operation of conveying until the perforation 61 reaches the cutter 53 after recording is referred to as a tear-off operation. In the tear-off operation, the portion recorded by the recording head 20 is conveyed until it reaches the cutter 53, so the conveyance amount is at least the distance D from the recording position P2 to the cutting position P5.
When the perforation 61 reaches the cutting position P5, the control unit 101 stops the conveyance. When the user pulls the recording medium 60 upward during the stop, the recording medium 60 is cut at the perforation 61 by the cutter 53. The remaining recording medium 60 after being cut is upstream of the cut position P5. In FIG. 5, the length of the remaining recording medium 60 after cutting is indicated by a symbol F.

After the tear-off operation, the recording medium 60 between the cut position P5 and the recording position P2 is in an unrecorded blank (blank) state. Since such a long blank is wasted on the recording medium 60, before recording on the remaining recording medium 60 after the cut, an operation of conveying the blank to return to the recording position P2 is performed. This conveyance is called a tear-off return operation.
The control unit 101 starts a tear-off return operation after a predetermined time has elapsed after the conveyance is stopped or when a switch of the operation panel 115 is operated, and conveys the recording medium 60 in the reverse direction RE. The control unit 101 conveys in the reverse direction RE until the recording start position of the remaining pages after cutting reaches the recording position P2. Accordingly, the transport amount of the tear-off return operation is determined by the distance D and the length from the perforation 61 to the recording start position in the remaining recording medium 60 after cutting. When the recording start position reaches the recording position P2, the control unit 101 causes the recording head 20 to perform recording while conveying the recording medium 60 in the forward direction FW. In the tear-off operation and the tear-off return operation, the control unit 101 transports the recording medium 60 by the first transport roller 23 and the second transport roller 24, and the tractor 30 is not driven.

Incidentally, as shown in FIG. 5, when the length F of the remaining recording medium 60 after cutting is short, the end of the recording medium 60 may be detached from the tractor 30 during the tear-off operation. For example, when the length F of the recording medium 60 is short, the above state may occur after a page near the end of the recording medium 60 is recorded. FIG. 5 shows a state in which the remaining recording medium 60 after cutting is one page. The second transport roller 24 sandwiches the last page of the recording medium 60, and the page end 65, which is the end of the last page, is directly below the recording head 20.
In the state of FIG. 5, since the recording medium 60 is out of the nip portion of the first transport roller 23, the page end 65 hits the first transport roller 23 when the tear-off return operation is performed. At this time, the page edge 65 may not be nipped by the first transport roller 23 due to warping or bending of the recording medium 60 or due to the strength of the waist of the recording medium 60. In this case, the recording medium 60 collides with the first conveying roller 23 and bends, and a paper jam occurs.

  Such a state may occur when the page end 65 is detached from the first transport roller 23 by the tear-off operation and the page end 65 contacts the first transport roller 23 by the subsequent tear-off return operation. That is, it can occur when the length F of the remaining recording medium 60 after cutting is shorter than the distance C from the nip position P1 to the cutting position P5.

When the length F is shorter than the distance C (F <C), the control unit 101 enables a means for avoiding the collision of the page end 65 with the first transport roller 23 during the tear-off return operation. This means only needs to prevent the page edge 65 from turning up when it hits the first conveyance roller 23 and to nip the page edge 65 to the first conveyance roller 23.
Specifically, a squeezing operation is performed by sandwiching the page edge 65 or the vicinity thereof between the recording head 20 and the platen 22. In this operation, the recording head 20 moves in the scanning direction W (FIG. 2), so that bending or warping of the recording medium 60 is sandwiched between the head tip 20a of the recording head 20 and the platen 22 and corrected.
As another example of the above means, before the page end 65 reaches the first transport roller 23, the first drive roller 23a and the first driven roller 23b are separated from each other, and the page end 65 is moved to the first transport roller. The operation of conveying to the 23 side is mentioned. In this operation, since the space between the first drive roller 23a and the first driven roller 23b opens, the page end 65 enters the space and is easily nipped.
In the present embodiment, an example in which the recording medium 60 is squeezed by the recording head 20 will be described.

FIG. 6 is a flowchart showing the operation of the printer 10, and particularly shows the recording, tear-off operation, and tear-off return operation.
The control unit 101 performs recording on the recording medium 60 in units of pages (step S11). That is, the control unit 101 acquires recording data for one page from the storage unit 102, controls the head driving unit 111 and the motor driving unit 112, and causes the recording medium 60 to be transported and recorded by the recording head 20.
After completing the recording for one page, the control unit 101 determines whether or not the recording medium 60 is a copy sheet (step S12). Whether the recording medium 60 is plain paper or copying paper is set in advance together with the size of the recording medium 60 (including the size in the width direction, the page length, etc.), and the setting data is stored in the storage unit 102. . The control unit 101 makes a determination based on the data stored in the storage unit 102. When the printer 10 has a function of detecting a platen gap that is the distance between the front end surface of the recording head 20 and the platen 22 and the thickness of the recording medium 60, the control unit 101 uses these functions to record the recording medium 60. It may be determined whether or not is a copy sheet.

  When the recording medium 60 is copy paper (step S12; Yes), the control unit 101 moves the carriage 21 to the center in the width direction of the recording medium 60 (step S13), and conveys the recording medium 60 according to the cut position P5. (Step S14). The operation of moving the carriage 21 in step S13 is an operation for preventing the recording head 20 from being caught on the copy paper. The copy paper has a thickness, and a staple of a stapler, a piece of paper for binding the paper, and the like may be attached, and these are usually provided at the end in the width direction. If the recording head 20 is at the end in the width direction of the copy paper when the copy paper is conveyed, the recording head 20 may hit the needle or a piece of paper and get caught. In particular, in the tear-off operation, since a long distance is transported quickly, it is easier to catch than when transporting one line at a time during recording. Accordingly, in step S13, the recording head 20 is moved to a position that avoids the side edge of the recording medium 60. The size in the width direction of the recording medium 60 and the position of the side edge of the recording medium 60 in the scanning direction W may be set in advance and stored in the storage unit 102, or a paper width sensor (not shown) mounted on the carriage 21. May be detected.

If the recording medium 60 is not a copy sheet (step S12; No), the control unit 101 proceeds to step S14 while keeping the carriage 21 in the retracted position (for example, the 0-digit position in the scanning direction W). The recording medium 60 is conveyed.
In step S14, the recording medium 60 is conveyed in the forward direction FW until the perforation 61 on the end side of the page recorded in step S11 reaches the cut position P5. The conveyance in step S14 corresponds to the tear-off operation described above.

  Here, the control unit 101 determines whether or not the rear-side paper detection sensor 42 is in an undetected state during conveyance (step S15). If the paper detection sensor 42 has detected the recording medium 60 until the conveyance is completed (step S15; No), the control unit 101 moves the carriage 21 to the center in the width direction of the recording medium 60 (step S16). Then, the recording medium 60 is conveyed in the reverse direction RE (step S17). The conveyance in step S17 corresponds to the above tear-off return operation. In the tear-off return operation, since the transport direction is reversed from the forward direction FW to the reverse direction RE, the recording medium 60 may be lifted. Therefore, the control unit 101 moves the carriage 21 to the center in step S16 to prevent the recording medium 60 from being lifted. When the recording start position of the recording medium 60 is conveyed to the recording position P2 by the tear-off return operation, the control unit 101 moves the carriage 21 to the standby position (step S18), returns to step S11, and records the next page. .

On the other hand, when the paper detection sensor 42 is in an undetected state during conveyance of the tear-off operation (step S15; Yes), the control unit 101 determines that the remaining cut recording medium 60 is the last page (step S15). Step S19).
The control unit 101 determines whether or not the last page length of the recording medium 60 is a recordable length (step S20). The control unit 101 makes a determination by comparing the page length F (FIG. 5) of the recording medium 60 set in advance with the distance B (FIG. 5) between the nip position P1 and the nip position P3. That is, when the page length F is shorter than the distance B (F <B), the recording medium 60 is detached from both the paper detection sensors 42 and 44 during the tear-off return operation, and thus cannot be normally conveyed. In this case, the control unit 101 determines that the length is not recordable (step S20; No), conveys the recording medium 60 in the forward direction FW, and discharges it from the paper discharge outlet (step S21).

If the page length F is greater than or equal to the distance B (F ≧ B), the control unit 101 determines that the final page length of the recording medium 60 is a recordable length (step S20; Yes). In this case, the control unit 101 executes a paper scooping operation that reciprocates the carriage 21 in the scanning direction W (step S22). In the paper scooping operation, it is preferable to reciprocate the carriage 21 a plurality of times in the scanning direction W, but the number of scans is not particularly limited.
The control unit 101 moves the carriage 21 to the center in the width direction of the recording medium 60 (step S23), and executes conveyance in the reverse direction RE (step S24). The conveyance in step S24 corresponds to a tear-off return operation. The purpose of moving the carriage 21 to the center in step S23 is as described in step S16.

Note that the paper scooping operation in step S22 is not limited to the conveyance in the reverse direction RE in step S24, and may be executed after the conveyance is started. In this case, it is desirable to perform a paper scooping operation before the page end 65 of the recording medium 60 reaches the first transport roller 23. That is, it is desirable to execute before the transport amount from the start of transport in the reverse direction RE becomes equal to or greater than “distance C−page length F”.
After transporting in the reverse direction RE, the control unit 101 performs recording on the last page of the recording medium 60 (step S25), and after recording, transports the last page in the forward direction FW and discharges it from the discharge port ( Step S21).

FIG. 7 is a flowchart showing the operation of the printer 10, and particularly shows an error detection process executed when the recording medium 60 is conveyed in FIG.
The control unit 101 can execute the error detection process of FIG. 7 independently of the operation shown in FIG. 6 by executing the program stored in the storage unit 102. The control unit 101 detects that the conveyance in the forward direction FW or the reverse direction RE is started (step S31), and starts monitoring the detection state of the paper detection sensors 42 and 44. The control unit 101 determines whether or not both of the paper detection sensors 42 and 44 are in the undetected state at the same time (step S32), and when either one detects the recording medium 60 (step S32; No) ) Continue monitoring until the transfer is complete. That is, the control unit 101 determines whether or not the conveyance is completed (step S33). If the conveyance is not completed (step S33; No), the control unit 101 returns to step S32 and continues monitoring. Further, when the conveyance is completed (step S33; Yes), this process is terminated.

  On the other hand, when both of the paper detection sensors 42 and 44 are simultaneously undetected (step S32; Yes), the control unit 101 determines that an error has occurred (step S34). In this case, the length of the recording medium 60 is shorter than the distance E between the nip position P1 that is the detection position of the paper detection sensor 42 and the detection position P4 of the paper detection sensor 44. During conveyance of the last page of the recording medium 60, the control unit 101 determines by comparing the page length F with the distance B in step S20 of FIG. Therefore, in step S32, unlike step S20, the remaining recording medium 60 has two or more pages, but if the length of the recording medium 60 is shorter than the distance E, it is determined as Yes. For example, the last page of the recording medium 60 may be shorter than the setting for some reason. Further, although the length of the recording medium 60 is longer than the distance E, if the recording medium 60 is not detected by the paper detection sensors 42 and 44 for other reasons, “Yes” is determined in step S32. For example, there is a case where a paper jam (clogging) occurs in the recording medium 60 and the recording head 20 is rounded around the recording head 20. Thus, when it is determined Yes in step S33, it is desirable to stop recording and conveyance and confirm by the user or operator. For this reason, the control unit 101 notifies the occurrence of an error by a method such as stopping the transport operation and turning on or blinking the LED of the operation panel 115 (step S35), and ends this process. In step S35, the conveyance is stopped by the interrupt control even during the operation of FIG. In step S35, if the carriage 21 is operating in the scanning direction W, this operation may also be stopped.

As described above, the printer 10 according to the embodiment to which the present invention is applied includes the first transport roller 23, the second transport roller 24, and the recording medium, which are a plurality of transport rollers arranged in the transport path 62 of the recording medium 60. And a recording head 20 for recording on the recording medium 60. A cut position P5 is provided downstream of the recording head 20 in the conveyance path 62 when the upstream side is the side to which the continuous sheet-like recording medium 60 is supplied and the downstream side is the downstream side. The printer 10 causes the control unit 101 to transport the recording medium 60 after recording to the cut position P5 by the first and second transport rollers 23 and 24, and reversely cut the recording medium 60 to the position of the recording head 20. Transport. When the recording medium 60 is detached from the first conveyance roller 23 during conveyance up to the cutting position P5, the control unit 101 collides the recording medium 60 with the first conveyance roller 23 when conveying the recording medium 60 in the reverse direction. Enable anti-collision means to prevent
Thereby, the end of the recording medium 60 does not collide with the first transport roller 23 in the tear-off return operation, so that the recording medium 60 can be prevented from being clogged. Therefore, recording can be performed near the end of the recording medium 60, for example, on the last page.

In addition, the printer 10 performs recording on the recording medium 60 in units of pages, and the control unit 101 conveys the perforation 61 of the recording medium 60 after recording to the cut position P5 by the first and second conveying rollers 23 and 24. . The control unit 101 conveys the cut recording medium 60 in the reverse direction to the position of the recording head 20, and sets the collision preventing means to the use state when the cut recording medium 60 is the last page. As a result, when recording is performed on the recording medium 60 in units of pages, even the final page can be recorded.
In addition, the recording head 20 is disposed to face the platen 22 disposed in the conveyance path 62, and the control unit 101 orthogonally crosses the head tip 20 a of the recording head 20 to the conveyance path 62 of the recording medium 60 as a collision prevention unit. Move in the scanning direction W. Thereby, the recording head 20 is moved on the recording medium 60 to suppress the floating of the recording medium 60, and the collision between the first conveying roller 23 and the recording medium 60 can be avoided.
Moreover, the control part 101 may cancel | release the nip of the upstream 1st conveyance roller 23 and the 2nd conveyance roller 24 as a collision prevention means.
According to the above embodiment, if the page length F of the last page of the recording medium 60 is equal to or greater than the distance E, the tear-off return operation can be executed and recorded on the last page. It can be used without waste.

Further, the control unit 101 starts the conveyance of the recording medium 60 after being cut in the reverse direction and before the end of the recording medium 60 reaches the first conveyance roller 23 on the upstream side, for example, Since the paper scooping operation is executed, collision can be prevented more reliably.
If the length of the cut recording medium 60 is shorter than a predetermined length set in advance, the control unit 101 discharges the recording medium 60 without conveying it in the reverse direction. For example, in step S20, when the remaining length of the recording medium 60 is shorter than the distance B, the recording medium 60 is discharged without recording, so that the recording medium 60 can be prevented from being jammed.

The printer 10 also includes paper detection sensors 42 and 44 that detect the recording medium 60 at a plurality of positions in the transport path 62. Since the control unit 101 determines that an error has occurred when the recording medium 60 is no longer detected by the paper detection sensors 42 and 44 during conveyance of the recording medium 60, the control unit 101 promptly responds to an abnormality in the length of the recording medium 60. Yes.
Further, the control unit 101 retracts the recording head 20 to a position where it does not overlap the side edge of the recording medium 60 during conveyance of the recording medium 60. Thereby, problems such as the recording head 20 being caught by the recording medium 60 during conveyance can be prevented. For example, this is more effective when the recording medium 60 is a thick recording medium 60 such as copy paper or when a staple of a stapler is attached to the recording medium 60.

  The above-described embodiment is merely an aspect of the present invention, and can be arbitrarily modified and applied within the scope of the present invention. For example, in the above embodiment, the case where the printer 10 prints fanfold paper in units of pages has been described as an example. However, the present invention is not limited to this, and the recording medium 60 may be roll paper. It may be a long sheet of other forms. Moreover, although the structure provided with the cutter 53 cut by a user's force was illustrated in the said embodiment, you may provide the auto cutter unit which cuts automatically instead of the cutter 53. FIG. In this case, the control unit 101 can drive the auto cutter unit after the tear-off operation and automatically shift to the tear-off return operation after cutting.

  Further, in the above embodiment, as a means for preventing the page edge 65 from colliding with the first transport roller 23, a paper scooping operation by the recording head 20 and an operation for releasing the nip of the first transport roller 23 are given as examples. explained. The present invention is not limited to this, and for example, a paper guide for guiding the page end 65 to the nip portion of the first transport roller 23 may be provided between the first transport roller 23 and the recording head 20. This paper guide is a movable paper guide having an effective state for guiding the page edge 65 and an ineffective state, and it is only necessary to be able to switch between valid and invalid by the control of the control unit 101. Of course, other means can be used. In the above embodiment, the case where recording is performed on a continuous sheet fed by the tractor 30 has been described as an example. However, for example, the roll paper is configured to have a roll paper holding unit that holds roll paper, and the roll paper is used as the printer main body 12. When supplying from the rear side, the above operation may be executed.

  Moreover, in the said embodiment, the number of the conveyance rollers provided in the conveyance path | route 62 is not limited, You may arrange | position three or more conveyance rollers. Further, the present invention is not limited to a dot impact printer, but can be applied to an ink jet printer, a thermal sublimation printer, a laser printer, and the like, and is applied to a recording apparatus incorporated in another device (such as a copying machine). It is also possible. In addition, it is needless to say that other detailed configurations according to the above embodiment can be arbitrarily changed.

  DESCRIPTION OF SYMBOLS 10 ... Printer (recording apparatus), 12 ... Printer main body, 20 ... Recording head, 20a ... Head end, 21 ... Carriage, 22 ... Platen, 23 ... 1st conveyance roller (conveyance roller), 24 ... 2nd conveyance roller (conveyance) Roller), 30 ... Tractor, 40 ... Conveyance motor, 42 ... Paper detection sensor (detection unit), 44 ... Paper detection sensor (detection unit), 53 ... Cutter, 60 ... Recording medium, 61 ... Perforation, 62 ... Conveyance path 65, page edge, 101, control unit, FW, forward direction, RE, reverse direction, W, scanning direction, P1, nip position, P2, recording position, P3, nip position, P4, detection position, P5, cut position. .

Claims (9)

A plurality of transport rollers arranged in the transport path of the recording medium;
A recording head for recording on the recording medium;
When the upstream side is the side on which the continuous sheet-like recording medium is supplied and the downstream side is the downstream side, a cut position provided downstream of the recording head in the transport path;
A controller that transports the recording medium after recording to the cut position by the transport roller, and transports the remaining cut recording medium to the position of the recording head in a reverse direction;
When the recording medium is removed from the upstream-side transport roller during transport to the cut position, the control unit determines whether the recording medium and the upstream-side transport roller are transported in the reverse direction. Enable anti-collision means to prevent collisions,
A recording apparatus. Recording is performed in page units on the recording medium by the recording head,
The control unit causes the conveyance roller to convey the boundary between pages of the recording medium after recording to the cut position, and conveys the remaining cut recording medium in the reverse direction to the position of the recording head,
When the remaining cut recording medium is the last page, the collision preventing means is put into use;
The recording apparatus according to claim 1. The recording head is disposed to face a platen disposed in the transport path;
3. The recording apparatus according to claim 1, wherein the control unit performs a function of moving a leading end surface of the recording head in a direction orthogonal to a conveyance path of the recording medium as the collision prevention unit. .   The recording apparatus according to claim 1, wherein the control unit executes a function of releasing a nip of the upstream conveying roller as the collision preventing unit.   The control unit executes the function from the start of reverse conveyance of the remaining cut recording medium until the end of the recording medium reaches the upstream conveyance roller, The recording apparatus according to claim 3, wherein the recording apparatus is a recording apparatus.   2. The control unit according to claim 1, wherein when the length of the remaining cut recording medium is shorter than a predetermined length set in advance, the control unit discharges the recording medium without conveying it in the reverse direction. The recording apparatus according to any one of 5. A detection unit for detecting the recording medium at a plurality of positions in the transport path;
The control unit determines that an error has occurred when the detection unit no longer detects the recording medium at a plurality of positions during conveyance of the recording medium. The recording device described in 1.   The recording apparatus according to claim 1, wherein the control unit retracts the recording head to a position that does not overlap a side end of the recording medium during conveyance of the recording medium. . Transport the recording medium by a plurality of transport rollers arranged in the transport path of the recording medium,
Recording on the recording medium by a recording head,
When the continuous sheet-like recording medium is supplied on the upstream side and discharged on the downstream side,
The recording medium after recording is transported to the cut position provided downstream of the recording head in the transport path, and the operation of transporting the remaining cut recording medium in the reverse direction to the position of the recording head is performed.
Collision to prevent collision between the recording medium and the upstream conveying roller when the recording medium is conveyed in the opposite direction when the recording medium is removed from the upstream conveying roller during conveyance to the cut position Enabling prevention measures,
A control method for a recording apparatus.

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