JP6811227B2 - Recording device - Google Patents

Description

The present invention relates to a recording device that conveys and records a roll-shaped recording sheet.

As a recording device that records an image on a recording sheet such as roll paper that is rolled into a roll, there is an inkjet printer. In an inkjet printer, a long sheet drawn from a roll portion wound in a roll shape is conveyed by a conveying device while being guided by a conveying guide, and ink droplets are ejected from a plurality of recording heads to display an image on the long sheet. Record.

In such a transfer device, the long sheet is conveyed in the transfer direction by the transfer roller, and when the rolled portion of the stopped long sheet starts to rotate, the transfer roller is in the direction opposite to the transfer direction. Creates resistance. This resistance is a rotational load generated when the roll portion of the long sheet having mass is conveyed by the angular acceleration from the start of rotation to the rotation at a constant speed. Further, in such a transport device, since this rotational load acts as a back tension in the transport direction of the long sheet, if the back tension is large, the transport amount of the long sheet by the transport roller may be deviated.

On the other hand, Patent Document 1 relates to a transport device that eliminates the influence of the rotational load of such a long sheet, and corresponds to the weight of the long sheet so that the rotational load of the long sheet becomes a predetermined size. Discloses a configuration that limits the magnitude of acceleration during shifting of the transport roller.

JP-A-2007-246222

However, in Patent Document 1, when the weight of the roll paper is large, the rotational load due to the inertia of the roll paper increases, so it is necessary to reduce the acceleration of the transport roller in order to make this rotational load a predetermined size. .. Therefore, in Patent Document 1, the heavier the weight of the roll paper, the longer the time required for acceleration until the constant speed is reached, and the recording operation must be waited for, which causes a problem that the productivity is lowered.

An object of the present invention is to provide a recording device capable of transporting a recording sheet to a recording area with high accuracy without reducing productivity even if back tension occurs in the transport of a recording sheet such as a long sheet. It is to be.

The recording device of the present invention includes a holding means for holding a roll-shaped recording sheet, a first holding and transporting means for sandwiching and transporting a sheet portion pulled out from the roll-shaped recording sheet held by the holding means. In the transport direction of the sheet portion, a detection position is provided downstream of the pinch position of the first pinch transport means, and the detection means for detecting the sheet portion at the detection position and the sheet portion in the transport direction. A second sandwiching and transporting means that is provided downstream of the detection position and that sandwiches and transports the sheet portion while the sheet portion is sandwiched by the first sandwiching and transporting means, and the second sandwiching and transporting means. It has a recording means for recording on the sheet portion conveyed by the above, and a control means for controlling the transfer speed of the sheet portion by the first sandwiching transport means and the second sandwiching transport means. The means is a state in which the sheet portion is sandwiched by the first sandwiching and transporting means, and the transporting speed is accelerated to a first predetermined speed before the tip of the sheet portion reaches the detection position. The acceleration period of 1 is set, and the transfer speed is set to a constant speed at the first predetermined speed from before the tip of the sheet portion reaches the detection position until it is sandwiched by the second sandwich transfer means. The first constant speed period is set, and the transfer speed is set to the first after the tip of the sheet portion is sandwiched by the second sandwiching transfer means and before recording by the recording means is started. A second acceleration period for accelerating to a second predetermined speed faster than the predetermined speed of is set.

According to the present invention, even if back tension occurs in the transport of a recording sheet such as a long sheet, the recording sheet can be transported to the recording area with high accuracy without lowering the productivity.

It is a schematic diagram of the recording apparatus which concerns on Embodiment 1 of this invention. It is a block diagram which shows the structure of the recording apparatus which concerns on Embodiment 1 of this invention. It is a side view which shows typically the transport device which concerns on Embodiment 1 of this invention. It is a perspective view of the guide unit which concerns on Embodiment 1 of this invention. It is a top view which shows typically the transport device which concerns on Embodiment 1 of this invention. It is a flow chart which shows the operation when the roll paper is conveyed at a low speed by the transfer apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the transition of the speed of the roll paper at the time of conveying the roll paper by the transport apparatus which concerns on Embodiment 1 of this invention. It is a flow chart which shows the operation when the roll paper is conveyed at high speed by the conveying apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the transition of the speed of the roll paper when the roll paper is conveyed at high speed by the transport apparatus which concerns on Embodiment 1 of this invention. It is a flow chart which shows the operation when the size of the roll paper of the transfer apparatus which concerns on Embodiment 2 of this invention is a predetermined width or more. It is a flow chart which shows the operation when the size of the roll paper of the transfer apparatus which concerns on Embodiment 2 of this invention is less than a predetermined width. It is a top view which shows typically the transport device which concerns on Embodiment 2 of this invention, and is the figure which shows the transition of the speed of a roll paper.

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

(Embodiment 1)
<Configuration of recording device>
The configuration of the recording device 100 according to the first embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2. FIG. 1 is a schematic view of the recording device according to the first embodiment of the present invention, and FIG. 2 is a block diagram showing a configuration of the recording device according to the first embodiment of the present invention.

The recording device 100 can be connected to the personal computer 140, and has a transport device 1, a recording head 130, and the like. The recording device 100 exemplifies an inkjet printer here.

The transport device 1 pulls out the roll paper 101 of a long sheet wound in a roll shape and transports it. The roll paper 101 is pulled out from a roll-shaped recording sheet (not shown) held by the holding means. The transport device 1 may transport a long sheet made of a material other than the roll paper 101, such as a resin sheet.

The recording head 130 as a recording means forms an image by an inkjet method on a roll paper 101 as a sheet portion conveyed to a recording area facing the recording head 130 by the conveying device 1. As the recording head 130, a line head is used in which a plurality of nozzles are arranged in a width substantially the same as the maximum recording width of the roll paper used. The recording head 130 is not limited to this configuration, and records by repeatedly transporting and stopping the roll paper and scanning in the width direction (intersecting direction) orthogonal to the transport direction of the roll paper 101 at the time of stopping. A serial type recording head may be used. Ink is ejected from the recording head 130 to the sheet portion conveyed to the recording area facing the recording head 130.

The control unit 150 (see FIG. 2) of the transfer device 1 controls the overall operation of the recording device 100. Specifically, the control unit 150 includes a CPU 150a, a ROM 150b, and a RAM 150c.

The CPU 150a as the control means controls the entire operation of the control unit 150 by executing the control program stored in the ROM 150b.

The ROM 150b stores the control program.

The RAM 150c functions as a working area of the CPU 150a.

The recording device 100 is provided with a cutter (not shown) that separates and discharges the roll paper 101 from the discharging portion of the recording device 100.

<Structure of transport device>
The configuration of the transport device 1 according to the first embodiment of the present invention will be described in detail with reference to FIGS. 1 to 5. FIG. 3 is a side view schematically showing the transport device according to the first embodiment of the present invention, FIG. 4 is a perspective view of the guide unit according to the first embodiment of the present invention, and FIG. 5 is a perspective view. It is a top view which shows typically the transport device which concerns on Embodiment 1 of this invention.

The transport device 1 includes a guide unit 102, a feed unit 110, a transport unit 120, a tip detection sensor 129, an encoder 160, a transport motor 170 (see FIG. 2), and a photo sensor 190 (see FIG. 2). ,have.

The guide unit 102 regulates the position of the roll paper 101 in the width direction, and guides the roll paper (sheet portion) 101 drawn out from the feeding unit 110 and fed to the transport unit 120.

Specifically, as shown in FIGS. 4 and 5, the guide unit 102 includes a fixed guide 103, a movable guide 104, a frame 105, and a volume sensor 180 (see FIG. 2). The guide unit 102 regulates the movement of the roll paper 101 in the width direction by varying the position according to the width of the roll paper 101 to which the movable guide 104 is fed with the fixed guide 103 as the reference side. The volume sensor 180 (see FIG. 2) is provided on the back side of the frame 105, and outputs a signal of a resistance value that is displaced in conjunction with the movement of the movable guide 104 to the CPU 150a of the control unit 150.

The roll paper 101 is rotatably stored in the feeding unit 110 as the holding means. The feeding unit 110 feeds the roll paper 101 to be stored to the transport unit 120 via the guide unit 102. Specifically, the feeding unit 110 includes a spool shaft (not shown) and a torque limiter 111 (see FIG. 3).

The spool shaft is rotatably provided in the feeding unit 110 and holds the roll paper 101.

The torque limiter 111 as a load applying member applies a load by generating torque in a direction opposite to the rotation direction and the conveying direction of the roll paper 101 when the roll paper 101 held on the spool shaft is unwound. ing. As a result, the torque limiter 111 suppresses the rotational inertial force generated when the rotation of the roll paper 101 to be fed is stopped.

The transport unit 120 transports the roll paper 101, which is guided by the guide unit 102 and is fed, to the recording area facing the recording head 130. Specifically, the transport unit 120 includes a transport belt (drive belt) 121, a drive pulley 122, a driven pulley 123, a driven pulley 124, an upstream nip roller 125, a downstream nip roller 126, a platen 127, and the like. It has a support roller 128 and.

The upstream nip roller 125 (first rotating body) and the transport belt 121 form a first sandwiching and transporting means, and the downstream nip roller 126 (second rotating body) and the transport belt 121 form a second sandwiching and transporting means. Consists of. Further, the downstream nip roller 126 is arranged on the downstream side of the roll paper 101 in the transport direction with respect to the upstream nip roller 125. The downstream nip roller 126 sandwiches and conveys the roll paper 101, which is sandwiched and conveyed by the upstream nip roller 125 and the conveying belt 121, by sandwiching the roll paper 101 by the opposing conveying belt 121 and conveying it to the recording area facing the recording head 130.

The transport belt (drive belt) 121 is wound around the drive pulley 122, the driven pulley 123, and the driven pulley 124, and is rotationally driven by the drive pulley 122 to load the roll paper 101 fed from the feeding unit 110. And transport. As shown in FIG. 5, a plurality of transport belts 121 are provided in the width direction orthogonal to the transport direction (sheet transport direction) of the roll paper 101, and are arranged along the width direction. The number of transport belts 121 is exemplified here by three.

The drive pulley 122 is connected to a transfer motor 170 (see FIG. 2) and is driven by the transfer motor 170 to drive the transfer belt 121.

The driven pulley 123 rotates in response to the drive of the transport belt 121.

The driven pulley 124 rotates in response to the drive of the transport belt 121.

The upstream nip roller 125 (first rotating body) is located downstream of the driven pulley 123 of the transport belt 121 in the transport direction of the roll paper 101 and at a detection position where the tip detection sensor 129 detects the tip of the roll paper 101 to be transported. It is provided on the upstream side. The upstream nip roller 125 is a driven roller that comes into contact with the transport belt 121, which is a driving belt, and rotates drivenly. The upstream nip roller 125 sandwiches the roll paper 101 with the transport belt 121 and transports the roll paper 101 in the transport direction. The upstream nip roller 125 presses the transport belt 121 in the direction of arrow A in FIG. As shown in FIG. 5, the upstream nip rollers 125 are provided in the same number as a plurality of transport belts 121 provided in the width direction orthogonal to the transport direction of the roll paper 101, and hold each of the transport belts 121 at a pressing position (pinching). Press at position).

The downstream nip roller 126 (second rotating body) is provided on the downstream side of the detection position of the tip detection sensor 129 and on the upstream side of the recording area for recording facing the recording head 130 in the transport direction of the roll paper 101. ing. The downstream nip roller 126 presses the roll paper 101 toward the conveyor belt 121 to suppress contact between the recording head 130 and the roll paper 101. The downstream nip roller 126 is a driven roller that is driven to rotate in contact with the transport belt 121, which is a drive belt. The downstream nip roller 126 sandwiches the roll paper 101 with the transport belt 121 and transports the roll paper 101 in the transport direction. The downstream nip roller 126 presses the transport belt 121 in the direction of arrow A in FIG. As shown in FIG. 5, the downstream nip rollers 126 are provided in the same number as a plurality of transport belts 121 provided in the width direction orthogonal to the transport direction of the roll paper 101, and press each of the transport belts 121.

The platen 127 is provided inside the transport belt 121, and supports the transport belt 121 in a recording region facing the recording head 130.

The support roller 128 as the driven roller is arranged so as to face each of the upstream nip roller 125 and the downstream nip roller 126 via the transport belt 121. The support roller 128 suppresses the displacement of the transport belt 121 due to the pressing of the upstream nip roller 125 and the downstream nip roller 126 in the direction of the arrow A. Therefore, the material of the support roller 128 is a mold roller having high hardness.

The transport unit 120 having the above configuration sandwiches the roll paper 101 at each sandwiching position by the number of transport belts 121 in the width direction corresponding to the size of the roll paper 101 in the width direction, the upstream nip roller 125, and the downstream nip roller 126. Transport. For example, when transporting the roll paper 101a having the minimum size width shown in FIG. 5, the transport unit 120 sandwiches and transports the roll paper 101 by one transport belt 121, an upstream nip roller 125, and a downstream nip roller 126, respectively. .. At this time, the roll paper 101a is subjected to a conveying force by one upstream nip roller (first rotating body) 125 and one downstream nip roller (second rotating body) 126, respectively.

The tip detection sensor 129 as a detection means is provided with a detection position between the pinching position of the upstream nip roller (first rotating body) 125 and the pinching position of the downstream nip roller (second rotating body) 126. .. The tip detection sensor 129 detects the tip of the roll paper 101 when the tip of the roll paper 101 conveyed by the transport belt 121 passes the detection position of the tip detection sensor 129, and detects the detection result by the CPU 150a of the control unit 150. Output to.

The CPU 150a of the control unit 150 detects the movement amount of the transfer belt 121 based on the signal input from the photo sensor 190 that detects the rotation signal of the encoder 160, which will be described later, and determines the transfer speed of the roll paper (sheet unit) 101. Control. The CPU 150a detects the size of the roll paper 101 in the width direction by detecting the position of the movable guide 104 based on the resistance value of the signal input from the volume sensor 180 of the guide unit 102. The CPU 150a receives recorded data, commands, or the like transmitted from the personal computer 140.

The CPU 150a transports the feeding unit 110 or the transport based on the received recorded data and commands, the input signal from the tip detection sensor 129, the detected movement amount of the transport belt 121, and the size of the roll paper 101 in the width direction. Controls the operation of the unit 120. The CPU 150a serves as a recording means based on the received recorded data and commands, an input signal from the tip detection sensor 129 as a detection means, and a signal input from the photo sensor 190 that detects a rotation signal. It also controls the timing of ink ejection from the recording head 130.

The encoder 160 is a rotary encoder that is fixed and rotates coaxially with a driven pulley 124 that drives and rotates the driven conveyor belt 121. The encoder 160 includes a disk-shaped encoder scale (not shown) whose scale is swayed in the rotation direction.

The transfer motor 170 changes the rotation speed to drive the drive pulley 122 under the control of the CPU 150a of the control unit 150, and changes the speed of the transfer belt 121 to change the transfer feed rate of the roll paper 101 to be conveyed.

The photosensor 190 (see FIG. 2) detects the passage of the scales of the encoder scale of the encoder 160, and outputs a signal corresponding to the number of passed scales (pulses) to the CPU 150a.

<Force acting on roll paper>
The force acting on the roll paper 101 according to the first embodiment of the present invention will be described.

The roll paper 101 to be conveyed is provided with a conveying force F acting in the conveying direction and a back tension T acting in the direction opposite to the conveying force F.

Here, the pressing force in the direction of arrow A shown in FIG. 3 of the upstream nip roller 125 is N1, the pressing force in the direction of arrow A shown in FIG. 3 of the downstream nip roller 126 is N2, and the friction between the roll paper 101 and the transport belt 121. Assuming that the coefficient is μ, the transport force F can be obtained by Eq. (1).

F = N1 × μ + N2 × μ (1)
From the equation (1), the conveying force F increases as the pressing force N1 of the upstream nip roller 125 in the arrow A direction or the pressing force N2 of the downstream nip roller 126 in the arrow A direction increases. Further, the back tension T is a total value of the torque limiter tension due to the torque limiter 111 and the tension due to the inertial force of the roll paper 101. The inertial force of the roll paper 101 increases as the acceleration when the roll paper 101 is conveyed increases.

If the back tension T is large with respect to the transport force F, there is a possibility that the roll paper 101 may deviate from the target transport amount. Therefore, in order to perform transport with high accuracy, the back tension T is It is necessary to increase the transport force F.

On the other hand, if the pressing force N1 in the arrow A direction of the upstream nip roller 125 or the pressing force N2 in the arrow A direction of the downstream nip roller 126 is made too large in order to increase the conveying force F, the recording of the roll paper 101 that comes into contact with the paper 101. The damage to the surface increases. Further, when the roll paper 101 is a label sheet with a release paper, if the pressing force N1 in the direction of arrow A of the upstream nip roller 125 is excessively increased, the label area R1 in which the label of the roll paper 101 exists. The impact on the roll paper 101 due to the passage of the step between the label and the non-labeled region R2 where the label does not exist becomes large. Similarly, when the roll paper 101 is a label sheet, when the pressing force N2 in the arrow A direction of the downstream nip roller 126 is made too large, the label area R1 where the label of the roll paper 101 exists and the label are displayed. The impact on the roll paper 101 due to passing through the step with the non-labeled region R2 that does not exist becomes large. As a result, blurring occurs in the roll paper 101 being recorded, and the quality of the image recorded on the roll paper 101 deteriorates.

Therefore, the upstream nip roller 125 and the downstream nip roller 126 are preferably made of a roller having a low hardness in order to reduce the shake of the roll paper 101 as much as possible. Therefore, it is preferable that the upstream nip roller 125 and the downstream nip roller 126 have a low hardness such as a sponge roller and have a foam layer, instead of a roller having a high hardness such as a mold roller.

<Operation of recording device>
The operation of the recording device 100 according to the first embodiment of the present invention will be described in detail with reference to FIGS. 6 to 9. FIG. 6 is a flow chart showing an operation when the roll paper is conveyed at a low speed by the conveying device according to the first embodiment of the present invention, and FIG. 7 is a flow chart showing the operation when the roll paper is conveyed by the conveying device according to the first embodiment of the present invention. It is a figure which shows the transition of the speed of the roll paper at the time of this. FIG. 8 is a flow chart showing an operation when the roll paper is conveyed at high speed by the conveying device according to the first embodiment of the present invention, and FIG. 9 is a flow chart showing the operation of conveying the roll paper at high speed by the conveying device according to the first embodiment of the present invention. It is a figure which shows the transition of the speed of the roll paper at the time of transporting.

The recording apparatus 100 according to the first embodiment of the present invention performs a recording operation by high-speed transfer (first mode) for improving productivity and a recording operation (second mode) in which image quality is prioritized and low-speed transfer is performed. It is selectable. This selection can be set from a personal computer 140 connected to the recording device 100, an operation unit (not shown) arranged in the recording device 100, or the like. When the first mode is selected, the sheet portion of the roll paper is conveyed while being recorded at high speed, so that the number of recordings per hour is increased and the productivity is improved. On the other hand, when the second mode is selected, the sheet portion of the roll paper is conveyed at a low speed for recording, so that the number of recordings per hour is reduced, but a high-precision image is formed, so that the image quality is improved. ..

In FIGS. 7 and 9, the standby position of the roll paper (sheet portion) 101 is a position between the holding position of the upstream nip roller (first rotating body) 125 and the detection position of the tip detection sensor 129. This is the position where the tip of the roll paper 101 stands by. When the roll paper 101 is set by the user, when the roll paper 101 conveyed by the upstream nip roller 125 is detected by the tip detection sensor 129, the upstream nip roller 125 or the like rotates in the reverse direction and the tip of the roll paper 101 is returned to the standby position. stand by. The detection position of the tip of the roll paper is a position where the tip of the roll paper 101 is detected by the tip detection sensor 129. The pressing position (pinching position) of the downstream nip roller 126 is a position pressed by the downstream nip roller 126. The printing start position is a position where recording is started on the roll paper 101 in the recording area by the recording head 130 as a recording means.

First, with reference to FIGS. 6 and 7, the operation of the recording device 100 when the transfer device 1 conveys the roll paper (sheet portion) 101 at a transfer speed (low speed transfer) lower than a predetermined speed in the second mode. explain.

The CPU 150a of the control unit 150 of the recording device 100 starts the operation shown in FIG. 6 by receiving the recorded data, commands, and the like transmitted from the personal computer 140.

First, the CPU 150a receives a command and recorded data related to the transport speed set by the user from the personal computer 140 by an input operation related to the user's transport speed selection or the like to the personal computer 140 (S1). Here, the transport speed set by the user is less than a predetermined speed. The set transport speed is exemplified here at 200 mm / sec. Further, the predetermined speed is exemplified here at 300 mm / sec.

Next, the CPU 150a, which has received the command and the recorded data, drives the transport motor 170 of the transport unit 120 in the forward rotation to accelerate the drive pulley 122 and the transport belt 121, and accelerates the roll paper 101 to the set transport speed. Let (S2).

When the second mode (low-speed transfer) is set, the CPU 150a sets the first roll paper 101 in which the tip of the roll paper 101 is stopped at the standby position, as shown by L1 in FIG. Accelerate to 200 mm / sec (low speed transfer), which is the predetermined speed of.

At this time, since the roll paper 101 is sandwiched and conveyed by the upstream nip roller (first rotating body) 125, the pressing force N1 is applied by the upstream nip roller 125. Further, the transport speed of the roll paper 101 is increased in a state where the pressing force N1 is applied to the roll paper 101.

In this way, when the set transfer speed is less than the predetermined speed (low-speed transfer), the CPU 150a of the control unit 150 uses the upstream nip roller 125 (first rotating body) to reach the set transfer speed of the roll paper 101. Accelerate. The first acceleration period required for this acceleration is a period during which the tip of the roll paper 101 reaches the first predetermined speed of 200 mm / sec (low-speed transport) before reaching the detection position.

Next, the CPU 150a determines whether or not the tip of the roll paper 101 has counted a predetermined number of pulses conveyed from the standby position to the front of the detection position (S3). As the predetermined number of pulses at this time, 120 pulses are exemplified here. Further, the transport distance from the standby position at this time is exemplified here by 15 mm.

The CPU 150a repeats the process of step S2 when the predetermined number of pulses is not counted (S3: No).

On the other hand, when the CPU 150a counts a predetermined number of pulses (S3: Yes), the CPU 150a controls the transport motor 170 to drive the transport belt 121 at a constant speed to drive the roll paper 101 at a constant speed at a set transport speed. Transport (S4). During the first constant speed period during which the CPU 150a conveys at a constant speed, the pinching position where the tip of the roll paper 101 (sheet portion) is sandwiched between the transport belt 121 and the second rotating body before reaching the detection position. This is the period during which the transport speed is set to a constant speed at the first predetermined speed. As a result, the roll paper 101 is conveyed to the recording area facing the recording head 130 at a set transfer speed.

For example, as shown by L1 in FIG. 7, the CPU 150a moves the roll paper 101 at a constant speed of 200 mm / sec when the tip of the roll paper 101 when counting a predetermined number of pulses is conveyed to the front of the detection position. Transport.

Next, the CPU 150a determines whether or not the tip of the roll paper 101 is detected by the tip detection sensor 129 based on the input signal from the tip detection sensor 129 in a state where the transport belt 121 is driven at a constant speed. S5).

When the CPU 150a does not detect the tip of the roll paper 101 (S5: No), the process of step S5 is repeated.

On the other hand, when the CPU 150a detects the tip of the roll paper 101 (S5: Yes), whether or not the tip of the roll paper 101 counts a predetermined number of pulses conveyed from the roll paper tip detection position to the printing start position. Is determined (S6). As the predetermined number of pulses at this time, 965 pulses are exemplified here. Further, the transport distance from the roll paper tip detection position to the printing start position is exemplified here as 48 mm.

The CPU 150a repeats the process of step S6 when the predetermined number of passes is not counted (S6: No).

On the other hand, the CPU 150a causes the recording head 130 to start the printing operation when the predetermined number of pulses is counted (S6: Yes) (S7). The transport speed is the first predetermined speed when recording is performed on the sheet portion by the recording means in the second mode.

Next, the CPU 150a adds the number of pulses according to the paper length of the roll paper 101 to the predetermined number of pulses in which the tip of the roll paper 101 is conveyed from the roll paper tip detection position to the cutter position for cutting the roll paper 101. It is determined whether or not the number of pulses has been counted (S8). As the predetermined number of pulses at this time, 3016 pulses are exemplified here. Further, the transport distance from the roll paper tip detection position to the cutter position is exemplified here as 142 mm. Here, the paper length is the length of the label area R1 in the roll paper 101 in the transport direction.

The CPU 150a repeats the process of step S8 when the number of pulses obtained by adding the number of pulses according to the paper length of the roll paper 101 to the predetermined number of pulses is not counted (S8: No).

On the other hand, when the CPU 150a counts the number of pulses obtained by adding the number of pulses corresponding to the paper length of the roll paper 101 to the predetermined number of pulses (S8: Yes), the recording head 130 terminates the printing operation. Then, the CPU 150a stops the transfer motor 170 (S9), and then stops the printing operation.

The CPU 150a maintains the state of being driven at a constant speed in step S5 until the printing operation is completed. For example, as shown by L1 in FIG. 7, the CPU 150a maintains a state in which the roll paper 101 is conveyed at a constant speed of 200 mm / sec at the detection position until the printing operation is completed.

In this way, the CPU 150a of the control unit 150 sets the acceleration period during which the back tension T becomes large to just before the detection position where the tip detection sensor 129 detects the tip of the roll paper (sheet portion), and thereafter at the set transport speed. The roll paper 101 is conveyed at a constant speed. As for the back tension T acting on the roll paper 101 during constant speed transportation, the angular acceleration of the roll paper 101 becomes 0, so that the inertial force of the roll paper 101 becomes 0, and only the torque limiter tension by the torque limiter 111 is obtained. As a result, it is possible to prevent the transfer amount from shifting after the tip of the roll paper 101 is detected by the tip detection sensor 129.

Next, L2 and L3 shown in FIG. 7 show a case where the set transfer speed is set to 300 mm / sec (high-speed transfer) faster than 200 mm / sec and the roll paper 101 is continuously accelerated to 300 mm / sec. There is.

In the case of L2 shown in FIG. 7, since the acceleration period until the set transfer speed reaches 300 mm / sec is set to the front of the detection position, the load on the transfer motor 170 for driving the transfer belt 121 increases. There is a possibility of stepping out. Further, since the pressing force N1 in the direction of arrow A of the upstream nip roller 125 is not changed, the force for sandwiching the roll paper 101 between the upstream nip roller 125 and the transport belt 121 is insufficient, and the roll paper 101 sandwiching the roll paper 101 slips. Therefore, the transport speed set before passing the detection position of the tip detection sensor 129 may not reach 300 mm / sec.

Further, in the case of L3 shown in FIG. 7, since the acceleration is suppressed, the tension due to the inertial force of the roll paper 101 becomes small. However, the tip of the roll paper 101 has passed the detection position of the tip detection sensor 129 during acceleration, and even if the roll paper 101 slips while accelerating to 300 mm / sec, the detection position of the tip detection sensor 129 It cannot be detected after passing through, and there is a risk of deviation from the target transport amount.

Subsequently, the recording device 100 when the transport device 1 according to the first embodiment of the present invention transports the roll paper (sheet unit) 101 at a second predetermined speed (high-speed transport) in which the first mode is set. The operation will be described with reference to FIGS. 8 and 9.

The CPU 150a of the control unit 150 of the recording device 100 starts the operation shown in FIG. 8 by receiving the recorded data, commands, and the like transmitted from the personal computer 140.

First, the CPU 150a receives a command and recorded data related to the transport speed set by the user from the personal computer 140 by an input operation related to the selection of the transport speed of the user to the personal computer 140 (S21). Here, the transport speed in the first mode set by the user is a second predetermined speed. The set transport speed is high-speed transport, and the speed recorded by the recording means during transport is exemplified here at 300 mm / sec.

Next, the CPU 150a, which has received the command and the recorded data, drives the transport motor 170 of the transport unit 120 in the forward rotation to accelerate the drive pulley 122 and the transport belt 121, and roll paper (sheet) up to the transport speed of the first stage. Part) 101 is accelerated (S22). The transport speed of the first stage is exemplified here at 200 mm / sec.

For example, as shown by L4 in FIG. 9, the CPU 150a uses the roll paper 101 whose tip of the roll paper (sheet portion) 101 is stopped at the standby position with the upstream nip roller 125 constituting the first sandwiching and transporting means. Before the tip detection sensor 129 as the detection means detects the tip of the recording sheet that is being pinched and transported by the transport belt 121, the transport speed is set to 200 mm / sec, which is the first stage transfer speed (first predetermined speed). Accelerate until you reach it. Here, the standby position is downstream of the holding position between the upstream nip roller 125 and the transport belt 121, and upstream of the detection position of the tip detection sensor 129.

At this time, since the roll paper 101 is sandwiched and conveyed by the upstream nip roller 125, the pressing force N1 is applied by the upstream nip roller 125. Further, the transport speed of the roll paper 101 is increased in a state where the pressing force N1 is applied to the roll paper 101.

Next, the CPU 150a determines whether or not the tip of the roll paper 101 has counted a predetermined number of pulses conveyed to the front of the detection position (S23). As the predetermined number of pulses at this time, 120 pulses are exemplified here. Further, the transport distance from the standby position at this time is exemplified here by 15 mm.

The CPU 150a repeats the process of step S23 when the predetermined number of pulses is not counted (S23: No).

On the other hand, when the CPU 150a counts a predetermined number of pulses (S23: Yes), the CPU 150a controls the transfer motor to drive the transfer belt 121 at a constant speed to transfer the roll paper 101 to the first stage transfer speed (first stage). (S24).

For example, as shown by L4 in FIG. 9, the CPU 150a conveys the roll paper 101 at a constant speed of 200 mm / sec before the tip of the roll paper 101 reaches the detection position when the predetermined number of pulses is counted.

As described above, the CPU 150a of the control unit 150 rolls the roll paper 101 when the tip of the roll paper 101 passes the detection position of the tip detection sensor 129 before the transfer speed reaches the set transfer speed (300 mm / sec). The paper 101 is conveyed at a constant speed. When the tip of the roll paper is detected by the tip detection sensor 129, the detection accuracy is good because the speed is constant. The transport control up to this point is the same as the second mode described above. During the constant speed period during which the CPU 150a conveys at a constant speed, the tip of the roll paper 101 (sheet portion) is conveyed from before reaching the detection position to the holding position sandwiched between the transport belt 121 and the second rotating body. It is a period in which the speed is set to a constant speed at the first predetermined speed.

Next, the CPU 150a determines whether or not the tip of the roll paper 101 is detected by the tip detection sensor 129 based on the input signal from the tip detection sensor 129 in a state where the transport belt 121 is driven at a constant speed. S25).

When the CPU 150a does not detect the tip of the roll paper 101 (S25: No), the process of step S25 is repeated.

On the other hand, when the CPU 150a detects the tip of the roll paper 101 (S25: Yes), has the CPU 150a counted a predetermined number of pulses conveyed to the position where the tip of the roll paper 101 has passed the pressing position of the downstream nip roller 126? Whether or not it is determined (S26). As the predetermined number of pulses at this time, 600 pulses are exemplified here. Further, the transport distance from the detection position to the pressing position of the downstream nip roller 126 is exemplified here by 25 mm.

The CPU 150a repeats the process of step S26 when the predetermined number of pulses is not counted (S26: No).

On the other hand, when the CPU 150a counts a predetermined number of pulses (S26: Yes), the CPU 150a controls the transfer motor 170 to accelerate and drive the transfer belt 121 to the set transfer speed, and roll paper to the set transfer speed. Accelerate 101 again (S27). Here, the set transfer speed is a second predetermined speed.

For example, as shown by L4 in FIG. 9, the CPU 150a is located at the pinching position where the tip of the roll paper 101 when counting a predetermined number of pulses is the pressing position of the downstream nip roller 126 constituting the second pinching and transporting means. The reached roll paper 101 is accelerated until it reaches 300 mm / sec. This acceleration period is a second acceleration period in which the tip of the roll paper 101 is pinched by the second pinching and transporting means and then accelerated before recording by the recording means is started.

At this time, since the roll paper 101 is sandwiched and conveyed by the upstream nip roller 125 and the downstream nip roller 126, the pressing force N1 is applied by the upstream nip roller 125 and the pressing force N2 is applied by the downstream nip roller 126. To. Further, the transport speed of the roll paper 101 is further increased in a state where the pressing pressure N1 and the pressing pressure N2 are applied to the roll paper 101.

In this way, the CPU 150a of the control unit 150 implements the first mode in which the roll paper 101 is gradually accelerated to the set transfer speed.

Next, the CPU 150a determines whether or not the tip of the roll paper 101 has counted a predetermined number of pulses conveyed from the detection position to the front of the printing start position (S28). As the predetermined number of pulses at this time, 395 pulses are exemplified here. Further, the transport distance from the detection position is exemplified here by 31.6 mm.

The CPU 150a repeats the process of step S28 when the predetermined number of pulses is not counted (S28: No).

On the other hand, when the CPU 150a counts a predetermined number of pulses (S28: Yes), the CPU 150a controls the transport motor to drive the transport belt 121 at a constant speed to drive the roll paper 101 at a set transport speed (second). It is conveyed at a constant speed (predetermined speed) (S29). As a result, the roll paper 101 is conveyed to the recording head 130 at a predetermined speed.

For example, as shown by L4 in FIG. 9, the CPU 150a has a transfer speed of 300 mm / sec, which is a set transfer speed when the tip of the roll paper 101 reaches the front of the printing start position when counting a predetermined number of pulses. The roll paper 101 is conveyed at a constant speed. During the second constant speed period in which the CPU 150a transports the roll paper 101 at a constant speed at a second predetermined speed, the tip of the roll paper 101 (sheet portion) moves to the recording position of the recording area recorded by the recording means. It is a period in which the transport speed is set to a constant speed at the second predetermined speed until it is reached.

Next, the CPU 150a determines whether or not the tip of the roll paper 101 has counted a predetermined number of pulses conveyed from the detection position to the printing start position (S30). As the predetermined number of pulses at this time, 965 pulses are exemplified here. Further, the transport distance from the detection position to the print start position is exemplified here as 48 mm.

The CPU 150a repeats the process of step S30 when the predetermined number of pulses is not counted (S30: No).

On the other hand, the CPU 150a causes the recording head 130 to start the printing operation when the predetermined number of pulses is counted (S30: Yes) (S31). In the first mode, the transport speed when recording is performed by the recording means is a second predetermined speed.

Next, the CPU 150a counts whether or not the number of pulses obtained by adding the number of pulses according to the paper length of the roll paper 101 to the predetermined number of pulses at which the tip of the roll paper 101 is conveyed from the detection position to the cutter position is counted. Judgment (S32). As the predetermined number of pulses at this time, 3016 pulses are exemplified here. Further, the transport distance from the detection position to the cutter position is exemplified here as 142 mm. Here, the paper length is the length of the label area R1 in the roll paper 101 in the transport direction.

When the CPU 150a counts the number of pulses obtained by adding the number of pulses corresponding to the paper length (label length) of the roll paper 101 to the predetermined number of pulses (S32: Yes), the CPU 150a terminates the printing operation on the recording head 130. Then, the CPU 150a stops the transfer motor 170 (S33), and then stops the printing operation.

The CPU 150a maintains the state of being driven at a constant speed in step S29 until the printing operation is completed. For example, as shown by L4 in FIG. 9, the CPU 150a maintains a state in which the roll paper 101 is conveyed at a constant speed of 300 mm / sec until the printing operation is completed.

As described above, in the present embodiment, each time the number of the upstream nip roller 125 and the downstream nip roller 126 holding the roll paper 101 increases, the upstream nip roller and the downstream nip roller 126 step the transport speed of the roll paper 101. Accelerate to a predetermined speed (first acceleration period and second acceleration period). As a result, even if back tension occurs in the transport of the roll paper 101 when recording while transporting the roll paper 101, the roll paper 101 can be transported with high accuracy without lowering the productivity.

In the present embodiment, a constant speed period (first constant speed period) is set while the speed is gradually increased, and the roll is rolled when the tip of the roll paper 101 passes the detection position of the tip detection sensor 129. The paper 101 is conveyed at a constant speed in order to improve the detection accuracy of the tip detection sensor 129 that detects the ink ejection timing of the recording head 130 and the tip position of the roll paper which is a reference for cut control. Therefore, in the present embodiment, after the roll paper 101 is conveyed at a constant speed at the detection position of the tip detection sensor 129, the downstream nip roller 126 sandwiches the roll paper 101 at the sandwiching position, and then the set transfer speed is set. The transport speed is gradually accelerated so as to reach.

However, in the present embodiment, the passing speed of the detection position of the roll paper 101 is not limited to a constant speed, and the roll paper 101 is accelerated to the detection position of the tip detection sensor 129 according to the performance of the tip detection sensor 129. May be passed through. Then, after the downstream nip roller 126 sandwiches the roll paper 101 at the sandwiching position, the transport speed of the roll paper 101 is accelerated at a high acceleration so as to reach the set transport speed, and the roll paper 101 is gradually accelerated in stages. It may be.

In the present embodiment, the first mode of high-speed transport in which acceleration is carried out in two stages and the second mode of low-speed transport in which stepwise acceleration is not carried out can be selected. It may be eliminated and the acceleration mode may be set to only two-step acceleration.

(Embodiment 2)
Since the configurations of the recording device and the transport device according to the second embodiment of the present invention are the same as those of FIGS. 1 to 5, the description thereof will be omitted.

<Operation of recording device>
The operation of the recording device 100 according to the second embodiment of the present invention will be described in detail with reference to FIGS. 10 to 12. FIG. 10 is a flow chart showing an operation when the size of the roll paper of the transport device according to the second embodiment of the present invention is equal to or larger than a predetermined width. FIG. 11 is a flow chart showing an operation when the size of the roll paper of the transport device according to the second embodiment of the present invention is less than a predetermined width. FIG. 12 is a plan view schematically showing the transport device according to the second embodiment of the present invention and a diagram showing the transition of the speed of the roll paper.

The present embodiment is characterized in that the transport control of the first pinch transport means and the second pinch transport means is changed according to the size of the roll paper 101 in the width direction orthogonal to the transport direction of the roll paper 101. To do. Specifically, the recording device 100 according to the present embodiment is an embodiment when the roll paper 101a shown in FIG. 5 described above having a size in the width direction of the roll paper 101 less than a predetermined width is conveyed at a predetermined speed. The operation shown in FIG. 8 is performed in the same manner as in FIG. 8, but the recording device 100 according to the second embodiment of the present invention has a first mode in which a plurality of acceleration periods are provided depending on the size of the roll paper 101 in the width direction and the like. It is possible to select a second mode in which a single acceleration period for accelerating the transport speed to a predetermined speed is set before reaching the detection position without providing a plurality of acceleration periods. This selection can be set from a personal computer 140 connected to the recording device 100, an operation unit (not shown) installed in the recording device 100, or the like.

First, the CPU 150a as a control means sends commands and recorded data related to the set transport speed and paper width to the personal computer 140 by an input operation related to the user's transport speed selection, paper width selection, and the like (S41). Receive more. The CPU 150a detects the position of the movable guide 104 that the user moves according to the width of the roll paper 101 based on the resistance value of the signal input from the volume sensor 180 of the guide unit 102, and feeds the roll paper. The size of 101 in the width direction may be determined.

Next, the CPU 150a determines whether or not the size of the roll paper 101 to be recorded in the width direction is equal to or larger than a predetermined width based on the resistance value of the received command or the signal input from the volume sensor 180 of the guide unit 102. (S42).

When the size of the roll paper 101 in the width direction is equal to or larger than a predetermined width (S42: Yes), the CPU 150a drives the transfer motor 170 in the forward direction to accelerate the drive pulley 122 and the transfer belt 121, and sets the transfer speed. The roll paper 101 is accelerated to (S43). The set transport speed is exemplified here at 300 mm / sec.

For example, as shown by L5 in FIG. 12, the CPU 150a accelerates the roll paper 101 in which the tip of the roll paper (sheet portion) 101 is stopped at the standby position to a set transfer speed of 300 mm / sec.

At this time, since the roll paper 101 is sandwiched and conveyed by the plurality of upstream nip rollers 125 provided in the width direction, the plurality of upstream nip rollers 125 (the first roller and the second roller according to the present invention). A pressing force N1 is applied by each of the above. Each of the plurality of upstream nip rollers 125 is provided in a region different from that of the other upstream nip rollers 125 in the rotation axis direction of the upstream nip rollers 125. Further, the transport speed of the roll paper 101 is increased in a state where the pressing force N1 is applied to the roll paper 101 from the plurality of upstream nip rollers 125.

Next, the CPU 150a determines whether or not the tip of the roll paper 101 has counted a predetermined number of pulses conveyed to the front of the detection position of the tip detection sensor 129 (S44). As the predetermined number of pulses at this time, 120 pulses are exemplified here. Further, the transport distance from the standby position at this time is exemplified here by 15 mm.

The CPU 150a repeats the process of step S44 when the predetermined number of pulses is not counted (S44: No).

On the other hand, when the CPU 150a counts a predetermined number of pulses (S44: Yes), the CPU 150a controls the transport motor to drive the transport belt 121 at a constant speed to drive the roll paper 101 at a set transport speed (second). It is conveyed at a constant speed (predetermined speed) (S45).

For example, as shown by L5 in FIG. 12, the CPU 150a brings the roll paper 101 to 300 mm when the tip of the roll paper 101 when counting a predetermined number of pulses is conveyed to the front of the detection position of the tip detection sensor 129. Transport at a constant speed at / sec.

Next, the CPU 150a determines whether or not the tip of the roll paper 101 is detected by the tip detection sensor 129 based on the input signal from the tip detection sensor 129 in a state where the transport belt 121 is driven at a constant speed. S46).

When the CPU 150a does not detect the tip of the roll paper 101 (S46: No), the process of step S46 is repeated.

On the other hand, when the CPU 150a detects the tip of the roll paper 101 (S46: Yes), the CPU 150a determines whether or not the tip of the roll paper 101 has counted a predetermined number of pulses conveyed from the detection position to the printing start position. (S47). As the predetermined number of pulses at this time, 965 pulses are exemplified here. Further, the transport distance from the detection position to the print start position at this time is exemplified here as 48 mm.

The CPU 150a repeats the process of step S47 when the predetermined number of pulses is not counted (S47: No).

On the other hand, when the CPU 150a counts a predetermined number of pulses (S47: Yes), the recording head 130 starts a printing operation (S48).

Next, the CPU 150a counts whether or not the number of pulses obtained by adding the number of pulses according to the paper length of the roll paper 101 to the predetermined number of pulses at which the tip of the roll paper 101 is conveyed from the detection position to the cutter position is counted. Judgment (S49). As the predetermined number of pulses at this time, 3016 pulses are exemplified here. Further, the transport distance from the detection position to the cutter position at this time is exemplified here as 142 mm.

The CPU 150a repeats the process of step S49 when the number of pulses obtained by adding the number of pulses according to the paper length of the roll paper 101 to the predetermined number of pulses is not counted (S49: No).

On the other hand, when the CPU 150a counts the number of pulses obtained by adding the number of pulses corresponding to the paper length of the roll paper 101 to the predetermined number of pulses (S49: Yes), the recording head 130 terminates the printing operation. Then, the CPU 150a stops the transfer motor 170 (S50), and then stops the image forming operation.

The CPU 150a maintains the state of being driven at a constant speed in step S45 until the printing operation is completed. For example, as shown by L5 in FIG. 12, the control unit 150 maintains the state in which the roll paper 101 is conveyed at a constant speed of 300 mm / sec until the printing operation is completed.

In this way, the CPU 150a of the control unit 150 sets the acceleration period in which the back tension T becomes large to the front of the detection position of the tip detection sensor 129, and thereafter conveys the roll paper 101 at a constant speed at a set transfer speed. As for the back tension T acting on the roll paper 101 during constant speed transportation, the angular acceleration of the roll paper 101 becomes 0, so that the inertial force of the roll paper 101 becomes 0, and only the torque limiter tension by the torque limiter 111 is obtained. As a result, it is possible to prevent the transfer amount from shifting after the tip of the roll paper 101 is detected by the tip detection sensor 129.

On the other hand, when the size of the roll paper 101 in the width direction is less than the predetermined width (when the size is the first size) (S42: No), the CPU 150a drives the transport motor 170 of the transport unit 120 in the forward rotation. The pulley 122 and the transport belt 121 are accelerated and driven. Then, the CPU 150a accelerates the roll paper 101 to the first stage transfer speed (S51). The transport speed of the first stage is exemplified here at 200 mm / sec.

At this time, since the roll paper 101 is sandwiched and conveyed by the upstream nip roller 125, the pressing force N1 is applied by the upstream nip roller 125. Further, the transport speed of the roll paper 101 is accelerated in a state where the pressing force N1 is applied to the roll paper 101. The first acceleration period required for this acceleration is a period in which the tip of the roll paper 101 reaches the first predetermined speed of 200 mm / sec before reaching the detection position of the tip detection sensor 129.

Next, the CPU 150a determines whether or not the tip of the roll paper 101 has counted a predetermined number of pulses conveyed to the front of the detection position (S52). As the predetermined number of pulses at this time, 120 pulses are exemplified here. Further, the transport distance from the standby position at this time is exemplified here by 15 mm.

The CPU 150a repeats the process of step S52 when the predetermined number of pulses is not counted (S52: No).

On the other hand, when the CPU 150a counts a predetermined number of pulses (S52: Yes), the CPU 150a controls the transfer motor 170 to drive the transfer belt 121 at a constant speed to transfer the roll paper 101 to the first stage transfer speed (first stage). It is conveyed at a constant speed (1 constant speed) (S53). When the tip of the roll paper 101 passes the detection position of the tip detection sensor 129, the CPU 150a conveys the roll paper 101 at a constant speed. When the tip of the roll paper is detected by the tip detection sensor 129, the detection accuracy is good because the speed is constant. During the constant speed transfer period of the CPU 150a, the transfer speed is set from before the tip of the roll paper 101 (sheet portion) reaches the detection position until it is sandwiched between the transfer belt 121 and the second rotating body. It is a period in which the constant speed is set at the first predetermined speed (200 mm / sec).

In this way, the CPU 150a of the control unit 150 passes the roll paper 101 at a constant speed when the tip of the roll paper 101 passes the detection position of the tip detection sensor 129 before the transport speed reaches the set transport speed. Transport with.

Next, the CPU 150a determines whether or not the tip of the roll paper 101 is detected by the tip detection sensor 129 based on the input signal from the tip detection sensor 129 in a state where the transport belt 121 is driven at a constant speed. S54).

When the CPU 150a does not detect the tip of the roll paper 101 (S54: No), the process of step S54 is repeated.

On the other hand, when the CPU 150a detects the tip of the roll paper 101 (S54: Yes), the CPU 150a conveys a predetermined number of pulses to a position where the tip of the roll paper 101 has passed the pressing position (pinching position) of the downstream nip roller 126. Is determined (S55). As the predetermined number of pulses at this time, 600 pulses are exemplified here. Further, the transport distance from the detection position to the downstream side nip roller 126 pressing position (pinching position) is exemplified here as 25 mm.

The CPU 150a repeats the process of step S55 when the predetermined number of pulses is not counted (S55: No).

On the other hand, when the CPU 150a counts a predetermined number of pulses (S55: Yes), the CPU 150a controls the transport motor 170 to accelerate and drive the transport belt 121 to the set transport speed, and roll paper to the set transport speed. Accelerate 101 again (S56). Here, the set transport speed is the transport speed of the second stage.

At this time, since the roll paper 101 is sandwiched and conveyed by the upstream nip roller 125 and the downstream nip roller 126, the pressing force N1 is applied by the upstream nip roller 125 and the pressing force N2 is applied by the downstream nip roller 126. To. Further, the transport speed of the roll paper 101 is further increased in a state where the pressing pressure N1 and the pressing pressure N2 are applied to the roll paper 101.

In this way, the CPU 150a of the control unit 150 gradually accelerates the roll paper 101 to the set second predetermined speed. For example, the CPU 150a is a roll in which the tip of the roll paper 101 reaches the pinching position, which is the pressing position of the downstream nip roller 126 which is sandwiched and conveyed by the downstream nip roller 126 and the conveying belt 121 which form the second sandwiching and conveying means. The paper 101 is accelerated until it reaches 300 mm / sec. This acceleration period is a second acceleration period in which the tip of the roll paper 101 is pinched by the second pinching and transporting means and then accelerated before recording by the recording means is started.

Next, the CPU 150a determines whether or not the tip of the roll paper 101 has counted a predetermined number of pulses conveyed from the detection position of the tip detection sensor 129 to the front of the print start position (S57). As the predetermined number of pulses at this time, 395 pulses are exemplified here. Further, the transport distance from the detection position is exemplified here by 31.6 mm.

The CPU 150a repeats the process of step S57 when the predetermined number of pulses is not counted (S57: No).

On the other hand, when the CPU 150a counts a predetermined number of pulses (S57: Yes), the CPU 150a controls the transport motor to drive the transport belt 121 at a constant speed to drive the roll paper 101 at a set transport speed (second). It is conveyed at a constant speed (predetermined speed) (S58). As a result, the roll paper 101 is conveyed to the recording head 130 at a predetermined speed. During the second constant speed period in which the CPU 150a transports the roll paper 101 at a constant speed at a second predetermined speed, the tip of the roll paper 101 (sheet portion) reaches the recording position recorded by the recording means. This is the period during which the transport speed is set to a constant speed at the second predetermined speed.

Next, the CPU 150a determines whether or not the tip of the roll paper 101 has counted a predetermined number of pulses conveyed from the detection position to the printing start position (S59). As the predetermined number of pulses at this time, 965 pulses are exemplified here. Further, the transport distance from the detection position to the print start position is exemplified here as 48 mm.

The CPU 150a repeats the process of step S59 when the predetermined number of pulses is not counted (S59: No).

On the other hand, the CPU 150a causes the recording head 130 to start the printing operation when the predetermined number of pulses is counted (S59: Yes) (S60).

Next, the CPU 150a counts the number of pulses obtained by adding the number of pulses according to the paper length of the roll paper 101 to the predetermined number of pulses in which the tip of the roll paper 101 is conveyed from the detection position of the tip detection sensor 129 to the cutter position. It is determined whether or not it has been done (S61). As the predetermined number of pulses at this time, 3016 pulses are exemplified here. Further, the transport distance from the detection position to the cutter position is exemplified here as 142 mm. Here, the paper length is the length of the label area R1 in the roll paper 101 in the transport direction.

When the CPU 150a counts the number of pulses obtained by adding the number of pulses corresponding to the paper length of the roll paper 101 to the predetermined number of pulses (S61: Yes), the CPU 150a terminates the printing operation on the recording head 130. Then, the CPU 150a stops the transfer motor 170 (S62), and then stops the printing operation.

The CPU 150a maintains the state of being driven at a constant speed in step S58 until the printing operation is completed.

In the first embodiment, when the set transport speed is a predetermined speed, the roll paper 101 is accelerated stepwise in two steps until the set transport speed is reached. On the other hand, in the second embodiment of the present invention, when the set transport speed is a predetermined speed, the transport speed of the roll paper 101 is accelerated according to the size of the roll paper 101 in the width direction. Change the acceleration control.

Specifically, the roll paper 101b shown in FIG. 12 having a size in the width direction equal to or larger than a predetermined width (when the size is the second width) is sandwiched by three upstream nip rollers 125 and three transport belts 121. Transfer force is applied from each of the three upstream nip rollers 125 and the three transfer belts 121. As a result, the roll paper 101b is provided with a sufficiently large conveying force F (T2 <F) from the upstream nip roller 125 with respect to the tension T2 due to the inertial force of the roll paper 101b according to the above equation (1). Therefore, the recording device 100 can accelerate the roll paper 101b to a second predetermined speed of 300 mm / sec before the tip of the roll paper 101b is detected by the tip detection sensor 129.

In this state, the seat portion is sandwiched between the transport belt and the first rotating body, and the tip of the seat portion accelerates the transport speed to the second predetermined speed before reaching the detection position. A second mode for setting the acceleration period can be selected.

On the other hand, the roll paper 101a shown in FIG. 5 whose size in the width direction is less than a predetermined width (when the size is the first width) is sandwiched by one upstream nip roller 125 and one transport belt 121, and one piece. A transport force is applied from the upstream nip roller 125 and one transport belt 121.

As a result, the roll paper 101a does not apply a sufficiently large conveying force F from the upstream nip roller 125 to the tension T2 due to the inertial force of the roll paper 101a. Therefore, the recording device 100 accelerates and controls the transport speed of the roll paper 101a when it is sandwiched only by the upstream nip roller 125 until it reaches 200 mm / sec, and is sandwiched by both the upstream nip roller 125 and the downstream nip roller 126. By accelerating and controlling the transport speed of the roll paper 101a up to 300 mm / sec, the first mode of accelerating in stages can be selected.

As described above, in the present embodiment, acceleration control for accelerating the transport speed of the roll paper 101 according to the number of the upstream nip rollers 125 and the transport belt 121 provided along the width direction sandwiching the roll paper 101. To change. For example, in the case of a recording sheet of the first size whose size in the width direction is less than a predetermined width, the recording sheet is brought into contact with the first roller, and the recording sheet is sandwiched and conveyed without contacting the second roller. In the case of a recording sheet of a second size whose size in the direction is larger than the first size, the first roller and the second roller come into contact with each other to sandwich and convey the recording sheet, so that the recording of the first size is performed. In the case of a sheet, the first mode (two-step acceleration mode) according to the second embodiment of the present invention is selected, and in the case of a recording sheet of a second size, the second mode according to the second embodiment of the present invention is selected. The mode (one-step acceleration mode) is selected.

This reduces the number of steps in accelerating when recording on a large-sized recording sheet that is larger than the smaller size in the width direction, so that the size in the width direction is larger than the small size. The number of records increases and productivity improves. Further, the acceleration period for receiving the tension due to the inertial force that becomes resistance to the conveying force can be set before the tip of the roll paper 101 passes the detection position of the tip detection sensor 129, and the tip detection sensor 129 can be set to the roll paper 101. It is possible to prevent the transfer amount from shifting due to acceleration after detecting the tip of the paper.

In the present embodiment, when the number of the upstream nip rollers 125 and the transport belt 121 provided along the width direction holding the roll paper 101 exceeds a predetermined number, it is determined whether the set speed is low speed transport or high speed transport. Instead, the roll paper 101 may be accelerated to a set transport speed before the tip of the roll paper 101 passes the detection position of the tip detection sensor 129.

Further, in the present embodiment, when the size of the roll paper 101 in the width direction is equal to or larger than a predetermined width, the roll paper 101 is transferred to an arbitrary transfer speed exceeding the transfer speed when the roll paper 101 is conveyed by the upstream nip roller 125 and the transfer belt 121. It may be accelerated.

Further, in the present embodiment, when the transport speed set by the user is less than a predetermined speed (for example, low-speed transport of 200 mm / sec), the upstream nip roller does not determine the size of the roll paper 101 in the width direction. The roll paper 101 may be accelerated until the transfer speed set by the transfer by the transfer 125 and the transfer belt 121 is reached.

Further, in the present embodiment, when the transport speed set by the user is less than a predetermined speed (for example, low speed transport of 200 mm / sec), the upstream nip roller 125 and the transport belt 121 provided along the width direction roll. The roll paper 101 may be accelerated until the transfer speed set is reached only by the transfer by the upstream nip roller 125 and the transfer belt 121 without determining the number of sheets to be sandwiched.

It goes without saying that the present invention is not limited to the above-described embodiment and can be variously modified without departing from the gist thereof.

Specifically, in the first embodiment and the second embodiment, the two nip rollers, the first sandwiching and conveying means and the second sandwiching and conveying means, are arranged, but along the conveying direction of the roll paper 101. The transport force F may be applied to the roll paper 101 by three or more nip rollers provided therein. In this case, since a transport force F larger than the back tension T can be obtained even if the pressing force of each roller is reduced, the damage to the roll paper 101 due to the pinching force of the pinching transport means can be minimized. it can.

Further, in the first and second embodiments, the transport belt 121 may be removed and the support roller 128 may be changed to a drive roller that is rotationally driven by a drive motor. In this case, the upstream nip roller 125 constituting the first pinching and transporting means and the drive roller constituting the nip, and the downstream nip roller 126 constituting the second pinching and transporting means and the drive roller constituting the nip are used. It constitutes a sandwiching and transporting means. Then, the upstream nip roller 125 and the downstream nip roller 126 as the driven rollers that rotate in a driven manner are brought into contact with the drive roller to rotate the driven roller in a driven manner. At this time, each nip roller in contact with the recording surface of the roll paper 101 preferably has a foam layer such as a sponge roller and has a low hardness.

Further, in the first and second embodiments described above, the case of accelerating the transport speed to a predetermined speed of 300 mm / sec has been described as an example, but the transport speed may be accelerated to an arbitrary predetermined speed other than 300 mm / sec. Can be done.

Further, in the first embodiment and the second embodiment, the stepwise acceleration is set to two steps, but it may be increased to three steps or more.

Further, in the first and second embodiments, it is possible not to provide the support roller 128 for suppressing the displacement of the transport belt 121 due to the pressing in the direction of the arrow A. In such a configuration, it is preferable to adjust the pressing force of the upstream nip roller 125 and the downstream nip roller 126 in the direction of arrow A.

1 Transport device 100 Recording device 101 Roll paper 101a Roll paper 101b Roll paper 102 Guide unit 103 Fixed guide 104 Movable guide 105 Frame 110 Feeding unit 111 Torque limiter 120 Transport unit 121 Transport belt 122 Drive pulley 123 Driven pulley 124 Driven pulley 125 Upstream Side nip roller 126 Downstream side nip roller 127 Platen 128 Support roller 129 Tip detection sensor 130 Recording head 140 Personal computer 150 Control unit 150a CPU
150b ROM
150c RAM
160 Encoder 170 Conveyor motor 180 Volume sensor 190 Photo sensor

Claims (26)

A holding means for holding a roll-shaped recording sheet and
A first sandwiching and transporting means for sandwiching and transporting a sheet portion pulled out from the roll-shaped recording sheet held by the holding means.
In the transport direction of the seat portion, a detection position is provided downstream of the pinch position of the first pinch transport means, and the detection means for detecting the seat portion at the detection position and
A second sandwiching and transporting means that is provided downstream of the detection position in the transporting direction of the sheet portion and that sandwiches and transports the sheet portion while the sheet portion is sandwiched by the first sandwiching and transporting means. When,
A recording means for recording on the sheet portion conveyed by the second sandwiching and conveying means, and
It has a first pinching transport means and a control means for controlling the transport speed of the seat portion by the second pinching transport means.
The control means
A first acceleration that accelerates the transport speed to a first predetermined speed before the tip of the seat portion reaches the detection position in a state where the seat portion is sandwiched by the first pinching transport means. Set the period and
A first constant speed period in which the transfer speed is constant at the first predetermined speed from before the tip of the sheet portion reaches the detection position until it is sandwiched by the second sandwich transfer means. Set and
After the tip of the sheet portion is sandwiched by the second sandwiching transport means, the transport speed is accelerated to a second predetermined speed faster than the first predetermined speed before starting recording by the recording means. Set a second acceleration period to
A recording device characterized by that. The control means
The sheet has a first mode for setting the first acceleration period, the first constant speed period, and the second acceleration period, and the sheet portion is sandwiched between the first sandwiching and transporting means. A second mode, in which a single acceleration period for accelerating the transport speed to the second predetermined speed before the tip of the portion reaches the detection position, can be selected.
The recording device according to claim 1. The control means
When the seat portion has a first width in a direction intersecting the transport direction, the first mode is selected, and when the seat portion has a second width larger than the first width, the first mode is selected. Select the second mode,
2. The recording device according to claim 2. The first sandwiching and transporting means
A first roller and a second roller provided in a region different from that of the first roller in the rotation axis direction of the first roller are provided.
The sheet part
When the first sandwiching and transporting means conveys the sheet portion having the first width, the first sandwiching and transporting means comes into contact with the first roller without contacting the second roller, and the first sandwiching and transporting means. Touches the first roller and the second roller when the seat portion having the second width is conveyed.
The recording device according to claim 3, wherein the recording device is characterized by the above. The transport speed is
In the first mode and the second mode, when recording is performed on the sheet portion by the recording means, the speed is the second predetermined speed.
2. The recording device according to claim 2. The control means
There is no first mode for setting the first acceleration period, the first constant speed period and the second acceleration period, and the first acceleration period and the first acceleration period without the second acceleration period. A second mode for setting a constant speed period and a second mode can be selected.
The recording device according to claim 1. The transport speed is
When recording is performed on the sheet portion by the recording means in the first mode, the speed is the second predetermined speed, and when recording is performed on the sheet portion by the recording means in the second mode. , The first predetermined speed,
The recording device according to claim 6, wherein the recording device is characterized by the above. The control means
A second constant speed period is set in which the transport speed is set to a constant speed at the second predetermined speed until the tip of the sheet portion reaches the recording position recorded by the recording means.
The recording device according to claim 1. The control means
Based on the detection result of the detection means, the recording means controls the timing of recording on the sheet portion.
The recording device according to claim 1. The first sandwiching and transporting means and the second sandwiching and transporting means
It is composed of a drive roller that is rotationally driven and a driven roller that comes into contact with the drive roller and rotates driven by the rotation of the drive roller.
The recording device according to claim 1. The driven roller in contact with the recording surface of the sheet portion comprises a foam layer.
10. The recording device according to claim 10. When the first pinching transport means starts transporting the seat portion, the position of the tip of the seat portion is downstream of the pinching position of the first pinching transport means in the transport direction of the seat portion. And upstream of the detection means,
The recording device according to claim 1. The holding means is
A load applying member that applies a load in a direction opposite to the transport direction of the sheet portion when the sheet portion is conveyed from the roll-shaped recording sheet is provided.
The recording device according to claim 1. A holding means for holding a roll-shaped recording sheet and
A transport belt for transporting a sheet portion pulled out from the roll-shaped recording sheet held by the holding means, and a transport belt.
A recording means for recording on the sheet portion conveyed by the transfer belt, and
A first rotating body that comes into contact with the transport belt and transports the seat portion together with the transport belt.
In the transport direction of the seat portion, a detection position is provided downstream of the sandwiching position between the first rotating body and the transport belt, and a detection means for detecting the seat portion at the detection position.
In the transport direction of the seat portion, the seat portion is provided downstream of the detection position, is in contact with the transport belt, and is sandwiched between the transport belt and the first rotating body together with the transport belt. , A second rotating body that sandwiches and conveys the seat portion, and
A control means for controlling the transfer speed of the seat portion by the transfer belt, and
Have,
The control means
In a state where the seat portion is sandwiched between the transport belt and the first rotating body, the transport speed is accelerated to the first predetermined speed before the tip of the seat portion reaches the detection position. Set the first acceleration period,
First, the transport speed is set to a constant speed at the first predetermined speed from before the tip of the seat portion reaches the detection position until it is sandwiched between the transport belt and the second rotating body. Set the constant speed period of
After the tip of the sheet portion is sandwiched between the transport belt and the second rotating body, the transport speed is accelerated to a second predetermined speed before recording by the recording means is started. Set the acceleration period,
A recording device characterized by that. The control means
A first mode for setting the first acceleration period, the first constant speed period, and the second acceleration period, and a state in which the seat portion is sandwiched between the transport belt and the first rotating body. Then, it is possible to select a second mode in which a single acceleration period for accelerating the transport speed to the second predetermined speed is set before the tip of the seat portion reaches the detection position. ,
14. The recording device according to claim 14. The control means
When the seat portion has a first width in a direction intersecting the transport direction, the first mode is selected, and when the seat portion has a second width larger than the first width, the first mode is selected. Select the second mode,
The recording device according to claim 15. The first rotating body is
A first roller and a second roller provided in a region different from that of the first roller in the rotation axis direction of the first rotating body are provided.
The sheet part
When the first rotating body conveys the seat portion having the first width, the first rotating body comes into contact with the first roller without contacting the second roller, and the first rotating body is said. When the seat portion having the second width is conveyed, it comes into contact with the first roller and the second roller.
16. The recording device according to claim 16. The transport speed is
In the first mode and the second mode, when recording is performed on the sheet portion by the recording means, the speed is the second predetermined speed.
The recording device according to claim 15. The transport speed is
When recording is performed on the sheet portion by the recording means in the first mode, the speed is the second predetermined speed, and when recording is performed on the sheet portion by the recording means in the second mode. , The first predetermined speed,
The recording device according to claim 15. The control means
There is no first mode for setting the first acceleration period, the first constant speed period and the second acceleration period, and the first acceleration period and the first acceleration period without the second acceleration period. A second mode for setting a constant speed period and a second mode can be selected.
14. The recording device according to claim 14. The control means
A second constant speed period is set in which the transport speed is set to a constant speed at the second predetermined speed until the tip of the sheet portion reaches the recording position recorded by the recording means.
14. The recording device according to claim 14. The control means
Based on the detection result of the detection means, the recording means controls the timing of recording on the sheet portion.
14. The recording device according to claim 14. The first rotating body and the second rotating body rotate in accordance with the rotation of the transport belt.
14. The recording device according to claim 14. The position of the tip of the seat is
When the movement of the transport belt starts, it is downstream of the sandwiching position between the first rotating body and the transport belt and upstream of the detection position in the transport direction of the seat portion.
14. The recording device according to claim 14. The holding means is
A load applying member that applies a load in a direction opposite to the transport direction of the sheet portion when the sheet portion is conveyed from the roll-shaped recording sheet is provided.
14. The recording device according to claim 14. Each of the first rotating body and the second rotating body includes a foam layer.
14. The recording device according to claim 14.

Images