JP6787656B2 - Recording device - Google Patents

Description

The present invention relates to a recording device that records an image on a long recording medium.

Techniques for recording devices have been proposed. For example, Patent Document 1 discloses an inkjet printing apparatus. In this inkjet printing apparatus, printing is performed on continuous sheet-like fabrics. The inkjet printing device includes a tension control device, a wrinkle smoothing device, a texture correction device, a cloth position sensor, a transport unit, and a print unit. The tension control device applies an appropriate tension to the fabric. In the inkjet printing device, the fabric is maintained in a desired state by using a tension control device, a wrinkle smoothing device, a texture correction device, and a cloth position sensor. An adhesive is applied to the belt of the transport portion. The fabric is attached to the belt by a nip roll and sent to the printed portion. The printing unit has a line head type inkjet head.

Patent Document 2 discloses an inkjet recording device. This inkjet recording device includes a base material supply mechanism, a carriage mechanism, a platen, first and second transfer mechanisms, and a nip mechanism. The base material supply mechanism includes a flange unit and a hysteresis brake. The flange unit is mounted on a paper tube of a sheet base material. The hysteresis brake adds resistance torque to the rotation of the sheet base material being fed out of the paper tube. The carriage mechanism includes a carriage and a carriage transport mechanism. The carriage includes a plurality of recording heads and reciprocates in the main scanning direction by a carriage transport mechanism. In the inkjet recording device, the sheet base material is fed out from the paper tube held by the base material supply mechanism. At the time of image formation, transportation and stopping are repeated periodically. The extra rotation of the paper tube due to inertial force when the transfer is stopped is suppressed by the resistance torque due to the hysteresis brake. Along with this, the slack of the sheet base material is effectively reduced. In an inkjet recording device, the resistance torque by the hysteresis brake is determined according to the width of the sheet base material.

Japanese Unexamined Patent Publication No. 2001-63161 Japanese Unexamined Patent Publication No. 2004-299120

Depending on the recording device, an image may be recorded on a long recording medium. The recording device includes a transport unit and a recording unit. The long recording medium is set in the supply device, is fed out from the supply device, and is supplied to the transport unit. The transport unit transports the recording medium to the position where the recording unit is provided. The recording medium conveyed by the conveying unit passes through the recording unit. The recording unit records an image on a recording medium conveyed by the conveying unit. If the recording medium is long, the recording medium that is unwound from the feeding device and before reaching the transport unit may be loosened. The slack of the recording medium generated in the portion of the recording medium may cause wrinkles in the recording medium conveyed by the conveying unit. Wrinkles on the recording medium in the transport section cause deterioration in the quality of the recorded image.

An object of the present invention is to provide a recording device capable of suppressing the occurrence of slack in a long recording medium that is fed from a supply device and supplied to a transport unit.

One aspect of the present invention is a transport unit that transports a long recording medium fed from a supply device in a transport direction, and an inkjet head that ejects ink to the recording medium that is conveyed in the transport direction by the transport unit. A tension roller that rotates in a direction opposite to the direction corresponding to the transport direction in a state where the outer peripheral surface is in contact with the recording unit including the recording unit and the recording medium that is fed out from the supply device and has not reached the transport unit. And a tension motor that rotates the tension roller in a direction opposite to the direction corresponding to the transport direction, and a movement that reciprocates the recording unit including the inkjet head in the main scanning direction orthogonal to the transport direction. The transport unit is provided on the third side, which is downstream of the recording unit in the transport direction , and includes a first roller that rotates in a direction corresponding to the transport direction, and the first roller. A first motor that rotates in a direction corresponding to the transport direction, and a second roller that is provided on the fourth side that is upstream of the recording unit and rotates in a direction corresponding to the transport direction. With the first roller in a state where the inner peripheral surface is in contact with the outer peripheral surface of the first roller and the outer peripheral surface of the second roller, and the outer peripheral surface is horizontal between the first roller and the second roller. The recording medium, which includes an endless belt that is bridged by the second roller and rotates in a direction corresponding to the transport direction, and is placed on the horizontal outer peripheral surface of the endless belt, is intermittently mounted in the transport direction. conveyed to the tension roller, the second roller wherein we provided on the fourth side in the transport direction is from the inkjet head is, on the way the recording unit by the mobile unit is moving in the main scanning direction In the first motor, the recording unit that ejects ink and reciprocates in the main scanning direction by the moving unit is opposite to the first side in the main scanning direction and the first side in the main scanning direction. The first roller is intermittently rotated in correspondence with the timing of reaching at least one moving end of the second side in the main scanning direction, and the tension motor continuously rotates the tension roller. It is a recording device.

According to this, a tensile force in a direction opposite to the transport direction can be applied to a long recording medium conveyed in the transport direction. In the recording device, the recording medium can be conveyed in the conveying direction while pulling the recording medium in the direction opposite to the conveying direction. The recording medium can be kept wrinkle-free and can be passed through a recording unit including an inkjet head in that state. A tensile force can be applied to the recording medium in a state in which the recording medium is being conveyed in the conveying direction and in a state in which the recording medium is stopped. That is, when the recording medium is transported in the transport direction intermittently, the recording medium can be continuously pulled in the direction opposite to the transport direction.

In the recording device, the tension roller is provided on the side of the second surface of the recording medium opposite to the first surface of the recording medium on which an image is recorded, and the outer peripheral surface of the tension roller is the recording medium. It may be in contact with the second surface of. According to this, a tensile force can be applied to the recording medium through the second surface of the recording medium opposite to the first surface of the recording medium on which the image is recorded by the recording unit. It is possible to prevent the tension roller rotating in the direction opposite to the direction corresponding to the transport direction from coming into contact with the first surface of the recording medium.

The recording device may include a control unit that controls the torque of the tension motor. According to this, the tensile force can be adjusted. For example, it is assumed that the long recording medium is a material that easily extends in the longitudinal direction of the recording medium corresponding to the transport direction. In this case, the elongation of the recording medium can be suppressed by reducing the torque generated by the tension motor. It is assumed that the long recording medium is made of a material that is difficult to extend in the longitudinal direction of the recording medium. In this case, the recording medium can be kept taut by increasing the torque generated by the tension motor.

Recording equipment, the outer peripheral surface than the recording portion in the fourth side of the conveying direction is provided in a state facing the outer circumferential surface of the endless belt, a pressing portion for pressing the recording medium against the transport unit A fixing portion for fixing the recording medium pressed by the pressing portion is formed on the outer peripheral surface of the endless belt, and the transport portion is placed on the horizontal outer peripheral surface of the endless belt. Is intermittently transported in the transport direction in a state of being fixed to the outer peripheral surface of the endless belt by the fixing portion, and the tension roller is on the fourth side of the endless belt in the transport direction and of the endless belt. With the position in the transport direction where the pressing portion is provided with respect to the outer peripheral surface as a reference position, the distance from the reference position is the intermittent feed amount per time when the transport unit intermittently transports the recording medium. It may be provided at a position that is 5 times or less of . In this case, the fixing portion fixes the recording medium placed on the horizontal outer peripheral surface of the endless belt to the outer peripheral surface of the endless belt by any of adhesive, suction, and electrostatic adsorption. You may.

According to which this can be fixed to the recording medium placed placed on a horizontal peripheral surface of the endless belt on the outer peripheral surface of the endless belt. An appropriate tensile force can be applied to the recording medium.

According to the present invention, it is possible to obtain a recording device capable of suppressing the occurrence of slack in a long recording medium that is fed from the supply device and supplied to the transport unit.

It is a front view which shows an example of a recording system. It is a perspective view which shows an example of a recording apparatus.

Embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is not limited to the configurations described below, and various configurations can be adopted in the same technical idea. For example, a part of the configurations shown below may be omitted or replaced with other configurations. Other configurations may be included.

<Recording system>
In the recording system 1, a long recording medium on which an image is recorded is produced. As the recording medium, cloth 3 is exemplified. The cloth 3 is a fiber woven fabric made of various materials. In the embodiment, a long cloth 3 will be described as an example as a long recording medium. That is, in the recording system 1, a long cloth 3 on which an image is recorded is produced. The recording system 1 includes a supply device 10, a recovery device 12, a plurality of fifth rollers 14, and a recording device 16. In the recording system 1, three fifth rollers 14 are provided at predetermined positions shown in FIG. However, the number and arrangement of the fifth rollers 14 are examples. The number and arrangement of the fifth rollers 14 in the recording system 1 are appropriately set in consideration of various conditions. Hereinafter, the supply device 10, the recovery device 12, the fifth roller 14, and the recording device 16 will be described with reference to FIGS. 1 and 2, and then an example of the recording method will be described. The recording method is executed by the recording system 1 when the long cloth 3 on which the image is recorded is produced.

<Supply device, recovery device and fifth roller>
For example, a roll-shaped cloth 3 is set in the supply device 10. The supply device 10 feeds out the set cloth 3. The cloth 3 unwound from the supply device 10 is conveyed to the side of the recording device 16 and supplied to the recording device 16. The collection device 12 collects the cloth 3 on which the image is recorded in the recording device 16. For example, the cloth 3 on which the image is recorded is wound into a roll by the collecting device 12. That is, in the recording system 1, the fabric 3 is unwound from the supply device 10, passes through the recording device 16, is further conveyed to the recovery device 12, and is recovered by the recovery device 12. As the supply device 10 and the recovery device 12, a supply device and a recovery device provided in a known recording system can be adopted. Therefore, other description of the supply device 10 and the recovery device 12 will be omitted.

The plurality of fifth rollers 14 form a transport path together with the tension roller 60, the transport unit 20, and the fourth roller 80 in the recording device 16. The transport path is a path through which the cloth 3 passes between the supply device 10 and the recovery device 12. That is, in the recording system 1, the cloth 3 is conveyed from the supply device 10 toward the recovery device 12. In the embodiment, the direction in which the fabric 3 is conveyed is referred to as a "transportation direction". Regarding the transport direction, the side of the collection device 12 is referred to as the "third side", and the side of the supply device 10 is referred to as the "fourth side". The third side in the transport direction is the downstream side in the transport direction, and the fourth side in the transport direction is the upstream side in the transport direction.

Each of the three fifth rollers 14 is rotatably supported in a direction corresponding to the transport direction. The fifth roller 14 is in contact with the first surface 4 or the second surface 5 of the fabric 3 on the outer peripheral surface. The first surface 4 of the cloth 3 is the surface of the cloth 3 on which the image is recorded. The second surface 5 of the cloth 3 is the surface of the cloth 3 opposite to the first surface 4. When the outer peripheral surface of the fifth roller 14 comes into contact with the cloth 3 being conveyed, the fifth roller 14 rotates in a direction corresponding to the conveying direction. In FIGS. 1 and 2, the arcuate arrows shown on the outer circumference or the inside of the fifth roller 14 indicate the rotation direction of the fifth roller 14. However, a motor may be connected to a part or all of the fifth rollers 14 among the three fifth rollers 14. The motor rotates the fifth roller 14 to which it is connected in a direction corresponding to the transport direction.

<Recording device>
The recording device 16 is an inkjet recording device. In an inkjet recording device, ink is used as a recording agent. Therefore, in the recording device 16, an image is recorded on the cloth 3 using ink. The recording device 16 includes a transport unit 20, a third roller 30, a recording unit 40, a moving unit 50, a tension roller 60, a tension motor 61, a fourth roller 80, a third motor 81, and a control device. 90 is provided. In FIG. 1, the illustration of the recording unit 40 and the moving unit 50 is simplified and integrally shown. In FIG. 1, the illustration of the control device 90 is omitted. Hereinafter, each of the above-described configurations included in the recording device 16 will be described.

<Transport section>
The transport unit 20 is a belt conveyor. The transport unit 20 transports the cloth 3 unwound from the supply device 10 in the transport direction. The fabric 3 transported by the transport unit 20 passes through the recording unit 40. The transport unit 20 includes a first roller 21, a first motor 22, a second roller 23, and an endless belt 24. The first roller 21 is provided on the third side in the transport direction. The first motor 22 is connected to the first roller 21. The first motor 22 rotates the first roller 21 in a direction corresponding to the transport direction. The rotation of the first roller 21 by the first motor 22 is performed intermittently. In FIGS. 1 and 2, the arcuate arrow shown inside the first roller 21 indicates the direction of rotation of the first roller 21. The second roller 23 is provided on the fourth side in the transport direction.

The endless belt 24 is an annular belt. The endless belt 24 is bridged to the first roller 21 and the second roller 23 in a state where tension is applied. In the endless belt 24, the inner peripheral surface is in contact with the outer peripheral surface of the first roller 21 and the outer peripheral surface of the second roller 23. In a state where the endless belt 24 is bridged between the first roller 21 and the second roller 23, the outer peripheral surface of the endless belt 24 is in a horizontal state between the first roller 21 and the second roller 23. That is, in the transport unit 20, the transport direction is a horizontal direction.

As shown in FIG. 2, an adhesive portion 25 is formed on the outer peripheral surface of the endless belt 24. The adhesive portion 25 is formed on the outer peripheral surface of the endless belt 24 over the entire circumference. The adhesive portion 25 is formed of, for example, a known adhesive tape or adhesive. In FIG. 1, the adhesive portion 25 is not shown. In FIG. 2, the dot pattern attached to the outer peripheral surface of the endless belt 24 corresponds to the adhesive portion 25. In the transport unit 20, the endless belt 24 rotates intermittently in the direction corresponding to the transport direction as the first roller 21 is intermittently rotated by the first motor 22. The second roller 23 is driven by the intermittent rotation of the endless belt 24 and intermittently rotates in the direction corresponding to the transport direction. That is, in the transport unit 20, the fabric 3 is intermittently transported in the transport direction.

<Third roller>
The third roller 30 is a pressing portion. The third roller 30 as the pressing portion presses the cloth 3 against the outer peripheral surface of the endless belt 24 on which the adhesive portion 25 is formed. The third roller 30 is a roller called a nip roller. The third roller 30 is provided on the fourth side in the transport direction from the recording unit 40, with the outer peripheral surface facing the outer peripheral surface of the endless belt 24. The third roller 30 is rotatably supported in a direction corresponding to the transport direction. The width of the third roller 30 corresponds to the width W of the endless belt 24. For example, the width of the third roller 30 is set to be equal to or greater than the width W of the endless belt 24 (see FIG. 2).

As the pressing force by the third roller 30, for example, the own weight of the third roller 30 is used. An urging portion for urging the third roller 30 on the lower side in the vertical direction may be provided. By providing the urging portion, the pressing force can be increased as compared with the case where the third roller 30 has its own weight. An air cylinder is exemplified as the urging portion. In FIGS. 1 and 2, the urging portion is not shown. The cloth 3 passes between the endless belt 24 and the third roller 30. At this time, the outer peripheral surface of the third roller 30 comes into contact with the first surface 4 of the fabric 3 and rotates in a direction corresponding to the transport direction. Along with this, the cloth 3 is fixed to the outer peripheral surface of the endless belt 24 by the adhesive portion 25. The cloth 3 is conveyed in the conveying direction by the conveying section 20 in a state of being fixed to the outer peripheral surface of the endless belt 24. In FIGS. 1 and 2, the arcuate arrow shown on the outer circumference of the third roller 30 indicates the rotation direction of the third roller 30.

<Recording section>
The recording unit 40 records an image on the cloth 3 transported in the transport direction by the transport unit 20. In FIG. 2, the cross pattern attached to the portion of the cloth 3 shown on the third side in the transport direction from the recording unit 40 corresponds to the image recorded on the cloth 3. As shown in FIG. 2, the recording unit 40 includes an inkjet head 41K, 41M, 41Y, 41C and a carriage 42. The inkjet head 41K is an inkjet head that ejects black ink. The inkjet head 41M is an inkjet head that ejects magenta ink. The inkjet head 41Y is an inkjet head that ejects yellow ink. The inkjet head 41C is an inkjet head that ejects cyan ink.

A plurality of nozzles for ejecting ink of the corresponding color are formed in the inkjet heads 41K, 41M, 41Y, and 41C. According to the inkjet heads 41K, 41M, 41Y, 41C, a full-color image can be recorded on the cloth 3. The ink of each color is stored in the ink tank for each color, flows through the ink flow path for each color, and is supplied to the inkjet heads 41K, 41M, 41Y, and 41C, respectively. In FIGS. 1 and 2, the nozzle, the ink tank for each color, and the ink flow path are not shown.

The inkjet heads 41K, 41M, 41Y, and 41C are mounted on the carriage 42 in a state of being positioned at predetermined positions. As shown in FIG. 2, the inkjet heads 41K, 41M, 41Y, and 41C are mounted on the carriage 42 in a state of being adjacent to each other in the main scanning direction. The arrangement order of the inkjet heads 41K, 41M, 41Y, 41C in the main scanning direction may be different from that in FIG. The order of these sequences is appropriately determined in consideration of various conditions. The main scanning direction coincides with the width direction of the endless belt 24 in which the outer peripheral surface is horizontal as described above, and is orthogonal to the transport direction (see FIG. 2).

<Moving part>
The moving unit 50 reciprocates the recording unit 40 in the main scanning direction. As shown in FIG. 2, the moving unit 50 includes two pulleys 51 and 52, a timing belt 53, and a second motor 54. The pulley 51 is provided on the second side in the main scanning direction with reference to the transport portion 20. The pulley 52 is provided on the first side in the main scanning direction with reference to the transport portion 20. The pulley 52 is rotatably supported. The timing belt 53 is bridged over the pulleys 51 and 52 in a state where tension is applied. The second motor 54 is connected to the pulley 51. The second motor 54 rotates the pulley 51. In FIG. 2, the arcuate arrow shown inside the pulley 51 indicates the rotation direction of the pulley 51. The recording unit 40 is attached to the timing belt 53 via the support unit 55.

<Tension roller and tension motor>
The tension roller 60 is provided between the supply device 10 and the transport unit 20 in the transport direction, and on the side of the second surface 5 of the fabric 3 that is transported between the supply devices 10. The outer peripheral surface of the tension roller 60 comes into contact with the second surface 5 of the fabric 3 that is fed out from the supply device 10 and before reaching the transport portion 20. The outer peripheral surface of the tension roller 60 is in a state of generating a predetermined frictional force with the second surface 5 of the fabric 3. For example, the outer peripheral surface of the tension roller 60 is formed of an elastic body such as rubber or elastomer. The tension motor 61 is connected to the tension roller 60. The tension motor 61 rotates the tension roller 60 in a direction opposite to the direction corresponding to the transport direction. The rotation of the tension roller 60 by the tension motor 61 is continuously performed. In FIG. 1, the arc-shaped arrow shown on the outer circumference of the tension roller 60 and in FIG. 2 the arc-shaped arrow shown inside the tension roller 60 indicate the rotation direction of the tension roller 60.

<Fourth roller and third motor>
The fourth roller 80 is provided on the third side of the recording unit 40 in the transport direction and at a position higher than the transport surface of the transport unit 20 in the vertical direction. The transport surface of the transport unit 20 is a horizontal surface of the outer peripheral surface of the endless belt 24 on the side of the recording unit 40 on which the cloth 3 is transported in the transport direction. In the embodiment, the position of the fourth roller 80 in the transport direction is set to the third side in the transport direction from the transport unit 20. The outer peripheral surface of the fourth roller 80 is in contact with the second surface 5 of the fabric 3 on which the image is recorded on the first surface 4. The outer peripheral surface of the fourth roller 80 is in a state of generating a predetermined frictional force with the second surface 5 of the fabric 3. The outer peripheral surface of the fourth roller 80 is formed of an elastic body such as rubber or elastomer like the tension roller 60. The third motor 81 is connected to the fourth roller 80. The third motor 81 rotates the fourth roller 80 in a direction corresponding to the transport direction. The rotation of the fourth roller 80 by the third motor 81 is performed intermittently in correspondence with the intermittent rotation of the first roller 21 by the first motor 22. In FIG. 1, the arc-shaped arrow shown on the outer circumference of the fourth roller 80 (third motor 81) and the arc-shaped arrow shown inside the fourth roller 80 in FIG. 2 indicate the rotation direction of the fourth roller 80.

As the fourth roller 80 rotates in the direction corresponding to the transport direction, the fabric 3 transported by the transport unit 20 and passed through the recording unit 40 is pulled toward the fourth roller 80. Along with this, the fabric 3 fixed to the outer peripheral surface of the endless belt 24 by the adhesive portion 25 is peeled off from the outer peripheral surface (adhesive portion 25) of the endless belt 24. As described above, the cloth 3 is collected by the collection device 12 after passing through the fourth roller 80.

<Control device>
The control device 90 includes an operation unit 91, a control unit 93, and an internal power supply 94. The operation unit 91 receives a predetermined command. For example, the operation unit 91 receives a start command for the recording method described later. The operation unit 91 includes a setting unit 92. In the operation unit 91, the setting unit 92 receives the current value of the current supplied to the tension motor 61. The current value of the current supplied to the tension motor 61 will be described. In this description, the tension motor 61 is defined as a predetermined value (referred to as a “reference value” for convenience of explanation) of the tensile force applied to the fabric 3 before reaching the conveying unit 20 and being fed out from the supply device 10. The current value of the current supplied to is taken as the first value. When increasing the torque generated by the tension motor 61 and making the tensile force larger than the reference value, the operator inputs a second value higher than the first value to the setting unit 92. Along with this, the setting unit 92 accepts a second value as the current value of the current supplied to the tension motor 61. When reducing the torque generated by the tension motor 61 and making the tensile force smaller than the reference value, the operator inputs a third value lower than the first value to the setting unit 92. Along with this, the setting unit 92 accepts a third value as the current value of the current supplied to the tension motor 61.

The control unit 93 executes arithmetic processing and controls various processes executed by the recording device 16. For example, the control unit 93 controls the ejection of ink from the inkjet heads 41K, 41M, 41Y, 41C. The control unit 93 controls the drive of the first motor 22, the second motor 54, the tension motor 61, and the third motor 81, respectively. The internal power supply 94 is connected to an external power supply. The internal power supply 94 is connected to, for example, the first motor 22, the second motor 54, the tension motor 61, and the third motor 81. In FIG. 2, the illustration of the electric cable connecting the internal power supply 94, the first motor 22, the second motor 54, the tension motor 61, and the third motor 81 is omitted. The internal power supply 94 supplies current to the first motor 22, the second motor 54, the tension motor 61, and the third motor 81.

<Recording method>
The recording method will be described. The recording method is started at the timing when the operation unit 91 receives the image recording start command and the control unit 93 acquires the command. Prior to the input of the start command, the operator inputs the current value to the setting unit 92 of the operation unit 91. The control unit 93 acquires the current value received by the setting unit 92. The recording method is controlled by the control unit 93. With the execution of the recording method, the supply device 10 and the recovery device 12 also start operations at predetermined timings. That is, in the supply device 10, the feeding of the cloth 3 is started at a predetermined timing. The recovery device 12 starts collecting the fabric 3 at a predetermined timing.

The control unit 93 that started the recording method controls the drive of the tension motor 61, the moving unit 50 (second motor 54), the transport unit 20 (first motor 22), and the third motor 81. Along with this, for example, in the internal power supply 94, the continuous supply of the current of the current value acquired by the control unit 93 to the tension motor 61 is started. The current from the internal power supply 94 is continuously supplied to and flows through the tension motor 61. The tension motor 61 rotates. The tension roller 60 is continuously rotated by the tension motor 61 in a direction opposite to the direction corresponding to the transport direction.

The moving unit 50 and the transport unit 20 operate as follows. That is, in the moving unit 50, the current supplied from the internal power supply 94 flows through the second motor 54 according to the control by the control unit 93, and the second motor 54 reciprocates clockwise and counterclockwise. .. As the second motor 54 rotates, the pulley 51 reciprocates to the left and right sides and rotates. When the pulley 51 rotates counterclockwise as the second motor 54 rotates in a predetermined direction, the timing belt 53 also rotates counterclockwise. The pulley 52 rotates in accordance with the timing belt 53 that rotates counterclockwise. Along with this, the recording unit 40 moves from the first side to the second side in the main scanning direction. When the recording unit 40 reaches the moving end on the second side in the main scanning direction, the rotation direction of the second motor 54 is reversed, and the pulley 51 rotates clockwise. When the pulley 51 rotates clockwise, the timing belt 53 also rotates clockwise. The pulley 52 rotates in accordance with the timing belt 53 that rotates clockwise. Along with this, the recording unit 40 moves from the second side to the first side in the main scanning direction. When the recording unit 40 reaches the moving end on the first side in the main scanning direction, the rotation direction of the second motor 54 is reversed again, and the pulley 51 rotates counterclockwise again.

The transport unit 20 transports the fabric 3 in the transport direction in correspondence with the reciprocating movement of the recording unit 40 in the main scanning direction described above. In the transport of the fabric 3 by the transport unit 20, the timing at which the recording unit 40 reaches the moving end on the second side in the main scanning direction and is stopped for a predetermined period, and the movement of the recording unit 40 on the first side in the main scanning direction. It is performed intermittently at the timing when it reaches the end and is stopped for a predetermined period. That is, the control unit 93 controls the rotation of the first motor 22 by controlling the supply of electric power from the internal power supply 94 to the first motor 22 in accordance with the timings described above. In the ink of each color, the recording unit 40 is moving from the first side to the second side in the main scanning direction at a predetermined timing, and the recording unit 40 is moving from the second side to the first side in the main scanning direction. At a predetermined timing, the ink is ejected from the inkjet heads 41K, 41M, 41Y, 41C toward the first surface 4 of the fabric 3. The inks of each color ejected from the inkjet heads 41K, 41M, 41Y, and 41C land on the first surface 4 of the fabric 3. An image is recorded on the first surface 4 of the fabric 3 by the ink of each color that has landed.

The control unit 93 controls the intermittent rotation of the third motor 81 by controlling the supply of electric power from the internal power supply 94 to the third motor 81 in correspondence with the transport of the fabric 3 by the transport unit 20. Along with this, the fourth roller 80 rotates intermittently by a predetermined amount. In response to the rotation of the fourth roller 80, the fabric 3 is pulled toward the fourth roller 80 and peeled from the outer peripheral surface of the endless belt 24 fixed by the adhesive portion 25. The moving unit 50 operates until the recording of the image is completed. Therefore, the reciprocating movement of the recording unit 40 in the main scanning direction is repeated until the recording of the image is completed. The transport unit 20 is stopped at a predetermined timing, for example, after the recording of the image is completed. With the stop of the transport unit 20, the recording method ends. The rotation of the tension roller 60 by the tension motor 61 and the rotation of the fourth roller 80 by the third motor 81 also stop. Upon termination of the recording method, the supply device 10 and the recovery device 12 also terminate their operations.

<Effect of embodiment>
According to the embodiment, the following effects can be obtained.

(1) In the recording device 16 of the recording system 1, a tension roller 60 is provided between the supply device 10 and the transport unit 20 in the transport direction (see FIG. 1). A tension motor 61 is connected to the tension roller 60 (see FIG. 2). The tension motor 61 rotates the tension roller 60 in a direction opposite to the direction corresponding to the transport direction. The tension roller 60 rotates in a direction opposite to the direction corresponding to the transport direction in a state of being fed from the supply device 10 and in contact with the cloth 3 before reaching the transport portion 20 at the above-mentioned position.

Therefore, a tensile force can be applied to the cloth 3. That is, the cloth 3 unwound from the supply device 10 and before being fixed to the outer peripheral surface of the endless belt 24 by the adhesive portion 25 is pulled by this tensile force in the direction opposite to the transport direction. It is possible to suppress the occurrence of slack in the fabric 3 that is fed from the supply device 10 and is supplied to the transport unit 20. In the recording device 16, the cloth 3 can be fixed to the outer peripheral surface of the endless belt 24 on which the adhesive portion 25 is formed while being pulled in the direction opposite to the transport direction, and can be transported in the transport direction. In a state where the cloth 3 is fixed to the outer peripheral surface of the endless belt 24, it is possible to suppress the occurrence of wrinkles on the cloth 3.

(2) The tension roller 60 is provided between the supply device 10 and the transport unit 20 in the transport direction, and on the side of the second surface 5 of the fabric 3 that is transported between them (see FIGS. 1 and 2). Therefore, a tensile force can be applied to the cloth 3 via the second surface 5 of the cloth 3. A tension roller 60 that rotates in a direction opposite to the direction corresponding to the transport direction on the first surface 4 of the fabric 3 on which an image is recorded by inks of each color ejected from the inkjet heads 41K, 41M, 41Y, and 41C. It is possible to prevent the outer peripheral surfaces from coming into contact with each other.

The inventor examined the position in the transport direction in which the tension roller 60 is provided when the fabric 3 is intermittently transported in the transport direction by the transport unit 20. In this study, the inventor used the position where the cloth 3 is fixed to the outer peripheral surface of the endless belt 24 by the third roller 30 as the reference position. As a result of the examination, the inventor has found a configuration in which the distance from the reference position to the tension roller 60 is 5 times or less the intermittent feed amount. That is, by providing the tension roller 60 at such a position, it was possible to apply an appropriate tensile force to the fabric 3. The intermittent feed amount is the amount of movement of the cloth 3 that is transported at one time in the intermittent transportation of the cloth 3 by the transport unit 20 in the transport direction. In other words, in the transport unit 20, the fabric 3 is transported in the transport direction by the intermittent feed amount.

(3) In the control device 90, the operation unit 91 is provided with a setting unit 92 (see FIG. 2). The setting unit 92 receives the current value of the current supplied to the tension motor 61. The control unit 93 controls the current value of the current supplied from the internal power supply 94 to the tension motor 61 to the value received by the setting unit 92. Therefore, in the recording device 16, the torque generated by the tension motor 61 can be changed by appropriately setting the current value in the setting unit 92. That is, in the recording device 16, the torque of the tension motor 61 is controlled by the control unit 93 according to the current value received by the setting unit 92, and the tensile force acting on the fabric 3 via the tension roller 60 is adjusted. can do. For example, it is assumed that the cloth 3 is a material that easily stretches in the longitudinal direction of the cloth 3 corresponding to the transport direction. In this case, the elongation of the fabric 3 can be suppressed by reducing the torque generated by the tension motor 61. On the other hand, it is assumed that the cloth 3 is a material that is difficult to stretch in the longitudinal direction of the cloth 3 corresponding to the transport direction. In this case, by increasing the torque generated by the tension motor 61, the fabric 3 can be kept taut.

(4) In the recording method executed by the recording device 16 of the type in which the recording unit 40 is reciprocated in the main scanning direction by the moving unit 50 to record an image, a current is intermittently passed through the first motor 22. , A current is continuously passed through the tension motor 61. Along with this, in the transport unit 20, the fabric 3 is intermittently transported in the transport direction in a state corresponding to the reciprocating movement of the recording unit 40 in the main scanning direction by the moving unit 50. The tension roller 60 is continuously rotated by the tension motor 61 in a direction opposite to the direction corresponding to the transport direction. Therefore, the transport unit 20 can apply a tensile force to the fabric 3 in a state in which the fabric 3 is being transported in the transport direction and in a state in which the transport of the fabric 3 is stopped. That is, when the cloth 3 is transported in the transport direction intermittently, the cloth 3 can be continuously pulled in the direction opposite to the transport direction. In a state where the transport of the fabric 3 by the transport unit 20 is stopped, it is possible to suppress the occurrence of slack in the fabric 3 that is fed from the supply device 10 and is supplied to the transport unit 20.

<Modification example>
The embodiment can also be as follows. Some of the configurations shown in the following modifications can be adopted in combination as appropriate. Hereinafter, points different from the above will be described, and description of the same points will be omitted as appropriate.

(1) Regarding the transport direction, for convenience of explanation, the downstream side in the transport direction is set as the "third side", and the upstream side in the transport direction is set as the "fourth side" (see FIGS. 1 and 2). The settings of the third side and the fourth side in the transport direction may be opposite to the above. That is, the upstream side in the transport direction can be set as the "third side", and the downstream side in the transport direction can be set as the "fourth side". In this case, the first roller 21 to which the first motor 22 is connected is provided on the third side in the transport direction, which is the upstream side in the direction in which the fabric 3 is transported. The second roller 23 is provided on the fourth side in the transport direction, which is the downstream side in the transport direction of the fabric 3.

(2) In the recording device 16, the recording of the image on the cloth 3 is performed while the moving unit 50 reciprocates the recording unit 40 in the main scanning direction (see FIG. 2). As an inkjet recording device, a recording device of a type different from that of the recording device 16 has been put into practical use. In this different type of recording device, the recording unit includes an inkjet head called a line type. In this case, in the recording unit, the inkjet heads for each color are mounted on the carriage in a state of being adjacent to each other in the transport direction. In the line type inkjet head, a plurality of nozzles are arranged in the main scanning direction. The configuration of the embodiment in which a tensile force is applied to the fabric 3 by a tension roller 60 that rotates in a direction opposite to the direction corresponding to the transport direction may be adopted for a recording device having a line-type inkjet head for the recording unit. it can. The recording unit including the line-type inkjet head has a configuration adopted in a known inkjet recording device. Therefore, the description of the line type inkjet head and the recording unit including the line type inkjet head will be omitted.

Further, the configuration of the embodiment in which the tension roller 60 exerts a tensile force on the cloth 3 can be adopted in a recording device of a method different from the inkjet method. As an example of a long recording medium targeted by the recording system 1, a long cloth 3 is taken as an example. The long recording medium may be a medium made of a material different from that of the cloth 3. That is, the configuration of the embodiment can also be adopted as a recording device of a recording system that records an image for a long recording medium different from the long cloth 3. The recording medium including the cloth 3 may be fixed to the outer peripheral surface of the endless belt 24 by a fixing portion different from the adhesive portion 25. For example, the cloth 3 placed on the outer peripheral surface of the endless belt 24 may be sucked from the inner peripheral surface side of the endless belt 24. In addition, static electricity may be used. The third roller 30 may be omitted. The third roller 30 is adopted or omitted depending on the fixing method of the fixing portion for fixing the recording medium including the cloth 3 to the outer peripheral surface of the endless belt 24.

(3) The cloth 3 is set in the supply device 10 in a state of being rolled up in a roll shape, and is wound up in a roll shape by a recovery device 12 and collected (see FIG. 1). In the recording system, the supply and recovery of the long cloth 3 as the recording medium may be performed in the following states. That is, for example, the cloth 3 is in a state of being alternately folded in a predetermined direction, and is housed in a predetermined trolley or the like. The predetermined direction described above is, for example, a transport direction and a direction opposite thereto. The supply device includes an introduction roller that is rotated by a motor or the like. In the feeding device, the cloth 3 is fed out from the inside of the trolley set in the feeding device by rotating the roller for introduction. The fed cloth 3 is supplied to the transport unit 20 via the fifth roller 14 and the like as described above. At that time, the cloth 3 is in contact with the outer peripheral surface of the tension roller 60 on the second surface 5 as described above.

The collection of the cloth 3 is also carried out by accommodating the cloth 3 in a trolley different from the trolley on the supply side in a state of being alternately folded in a predetermined direction as in the case of supply. In this case, the recovery device includes a shake-off portion. In the swing-off portion, the lower portion in the vertical direction is swung by a motor or the like with the upper portion in the vertical direction as a fulcrum in the transport direction and in the opposite direction. Such a supply device and a recovery device are devices already adopted in a known recording device for a long recording medium such as the above-mentioned cloth 3. Therefore, other description of such a supply device and a recovery device will be omitted.

(4) The tension roller 60 is provided on the side of the second surface 5 of the fabric 3 (see FIGS. 1 and 2). In this case, the outer peripheral surface of the tension roller 60 is in contact with the second surface 5 of the fabric 3. The tension roller may be provided on the side of the first surface 4 of the fabric 3. In this case, the outer peripheral surface of the tension roller is in contact with the first surface 4 of the fabric 3. The tension roller is rotated by the tension motor in a direction opposite to the direction corresponding to the transport direction in a state where the tension roller is fed from the supply device 10 and is in contact with the first surface 4 of the fabric 3 before reaching the transport portion 20. By doing so, a tensile force can be applied to the fabric 3 in the same manner as described above.

(5) In the operation unit 91, the setting unit 92 receives the current value of the current supplied to the tension motor 61. A current having a current value received by the setting unit 92 is supplied to the tension motor 61. The tension motor 61 is driven in a state where torque corresponding to this current value is generated. As a set value for adjusting the torque generated by the tension motor 61, the value accepted by the setting unit of the operation unit may be a value different from the current value. The value accepted by the setting unit may be, for example, a ratio to a predetermined value as a reference. In addition, the torque generated by the tension motor 61 may be adjusted by a known method.

(6) In the recording device 16, the transport of the fabric 3 by the transport unit 20 is performed at the timing when the recording unit 40 reaches each moving end on the first side or the second side in the main scanning direction and is stopped for a predetermined period. It is done intermittently. As described above, the inks of each color are transferred from the inkjet heads 41K, 41M, 41Y, 41C to the cloth 3 at a predetermined timing when the recording unit 40 is moving between the first side and the second side in the main scanning direction. It is discharged toward. The transport of the fabric 3 by the transport unit 20 may be performed in correspondence with one reciprocating movement of the recording unit 40 in the main scanning direction. The ink of each color is moved at a predetermined timing when the recording unit 40 is moving from the first side to the second side in the main scanning direction, or the recording unit 40 is moving from the second side to the first side in the main scanning direction. At a predetermined timing, the ink is ejected from the inkjet heads 41K, 41M, 41Y, 41C toward the cloth 3.

For example, it is assumed that the ink is ejected at a predetermined timing when the recording unit 40 is moving from the first side to the second side in the main scanning direction. In this case, the ink is not ejected at the timing when the recording unit 40 is moving from the second side to the first side in the main scanning direction. In the transport of the fabric 3 by the transport unit 20, after the recording unit 40 reaches the moving end on the second side in the main scanning direction and stops, the fabric 3 moves again from the second side to the first side in the main scanning direction, and the main It is performed at a predetermined timing while reaching the first side in the scanning direction and stopping. In contrast to this, it is assumed that the ink is ejected at a predetermined timing when the recording unit 40 is moving from the second side to the first side in the main scanning direction. In this case, the ink is not ejected at the timing when the recording unit 40 is moving from the first side to the second side in the main scanning direction. In the transport of the fabric 3 by the transport unit 20, after the recording unit 40 reaches the moving end on the first side in the main scanning direction and stops, the fabric 3 moves again from the first side to the second side in the main scanning direction, and the main It is performed at a predetermined timing while reaching the second side in the scanning direction and stopping.

(7) The transport unit 20 is a belt conveyor including a first roller 21, a first motor 22, a second roller 23, and an endless belt 24. The transport unit 20 may be a transport unit of a type different from that of the belt conveyor. For example, the transport unit may be a transport drum. When a transport drum is adopted as the transport unit, the cloth 3 is placed on the outer peripheral surface of the transport drum. The transport drum is intermittently rotated to one side in the circumferential direction by the drive unit in the same manner as the intermittent rotation of the first roller 21 by the first motor 22 described above. The rotation direction of the transport drum is the same as that of the first roller 21 described above. Along with this, the fabric 3 is conveyed in the conveying direction. The fabric 3 conveyed by the transfer drum passes through the recording unit 40 during transfer. The recording unit 40 is provided so as to face the outer peripheral surface of the transport drum. An adhesive portion 25 is provided on the outer peripheral surface of the transport drum. For example, an adhesive portion 25 is formed on the outer peripheral surface of the transport drum over the entire circumference. The cloth 3 is conveyed in a state of being attached to the adhesive portion 25. The transport drum is a known transport unit. A recording device including a transport drum is also a known recording device. Therefore, other description of the transport drum and the recording device including the transfer drum will be omitted.

1 Recording system, 3 Fabric, 4 1st surface, 5 2nd surface 10 Supply device, 12 Recovery device, 14 5th roller, 16 Recording device 20 Conveyor, 21 1st roller, 22 1st motor, 23 2nd roller 24 Endless belt, 25 Adhesive part, 30 Third roller, 40 Recording part 41K, 41M, 41Y, 41C Inkjet head, 42 Carriage 50 Moving part, 51, 52 Pulley, 53 Timing belt 54 Second motor, 55 Support part, 60 Tension roller 61 Tension motor, 80 4th roller, 81 3rd motor 90 Control device, 91 Operation unit, 92 Setting unit, 93 Control unit 94 Internal power supply, W width

Claims (5)

A transport unit that transports a long recording medium unwound from a feeder in the transport direction,
A recording unit including an inkjet head that ejects ink to the recording medium transported in the transport direction by the transport unit.
A tension roller that rotates in a direction opposite to the direction corresponding to the transport direction in a state where the outer peripheral surface is in contact with the recording medium that is fed out from the supply device and before reaching the transport unit.
A tension motor that rotates the tension roller in a direction opposite to the direction corresponding to the transport direction, and
A moving unit that reciprocates the recording unit including the inkjet head in the main scanning direction orthogonal to the transport direction is provided.
The transport unit
A first roller provided on the third side, which is downstream of the recording unit in the transport direction, and rotating in a direction corresponding to the transport direction.
A first motor that rotates the first roller in a direction corresponding to the transport direction, and
A second roller provided on the fourth side, which is an upstream side in the transport direction from the recording unit, and rotating in a direction corresponding to the transport direction.
With the first roller in a state where the inner peripheral surface is in contact with the outer peripheral surface of the first roller and the outer peripheral surface of the second roller, and the outer peripheral surface is horizontal between the first roller and the second roller. Includes an endless belt that is bridged over the second roller and rotates in a direction corresponding to the transport direction.
The recording medium placed on the horizontal outer peripheral surface of the endless belt is intermittently conveyed in the conveying direction.
The tension roller is provided et is from the second roller to a fourth side of the conveying direction,
The inkjet head ejects ink while the recording unit is moving in the main scanning direction by the moving unit.
In the first motor, the recording unit that reciprocates in the main scanning direction by the moving unit has the first side in the main scanning direction opposite to the first side in the main scanning direction. The first roller is intermittently rotated in accordance with the timing of reaching at least one moving end of the second side of the above.
The tension motor is a recording device that continuously rotates the tension roller . The tension roller is provided on the side of the second surface of the recording medium opposite to the first surface of the recording medium on which an image is recorded, and the outer peripheral surface of the tension roller is the second surface of the recording medium. The recording device according to claim 1, which is in contact with. The recording device according to claim 1 or 2, further comprising a control unit for controlling the torque of the tension motor. The outer peripheral surface is provided on the fourth side of the recording unit in the transport direction so as to face the outer peripheral surface of the endless belt, and is provided with a pressing portion that presses the recording medium against the transport portion.
A fixing portion for fixing the recording medium pressed by the pressing portion is formed on the outer peripheral surface of the endless belt.
The transport unit intermittently transports the recording medium placed on the horizontal outer peripheral surface of the endless belt in the transport direction in a state of being fixed to the outer peripheral surface of the endless belt by the fixed portion.
The tension roller is located on the fourth side of the second roller in the transport direction and from the reference position with the position in the transport direction where the pressing portion is provided with respect to the outer peripheral surface of the endless belt as a reference position. The method according to any one of claims 1 to 3, wherein the distance is provided at a position where the transfer unit is provided at a position where the intermittent feed amount per time when the recording medium is intermittently conveyed is 5 times or less . Recording device. The fourth aspect of the present invention, wherein the fixing portion fixes the recording medium placed on the horizontal outer peripheral surface of the endless belt to the outer peripheral surface of the endless belt by any of adhesive, suction, and electrostatic adsorption. Recording device.

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