0001]The present invention relates to a printing apparatus, a printing method and a control device.
Background technique
[0002]Printing apparatus that performs printing by an inkjet method in a sheet-like recording medium is known (e.g., refer to Patent Document 1, Patent Document 2). The printing apparatus comprises a head having a plurality of nozzles, causes the recording medium is conveyed, and ejects ink while moving in a direction (main scanning direction) perpendicular to the head and the conveyance direction of the recording medium (sub scanning direction) It is configured.
[0003]
　Apparatus according to Patent Document 1 includes a media presser for pressing two edge portions in the width direction of the recording medium, respectively, and a detector for detecting the rotation angle of each media press. Then, by detecting in the detecting portion is configured to prevent a collision between the media presser and the head. However, for example, if each media press gets over the coupling portion of the recording medium, the state of the coupling portion (e.g., thickness degree) can not accurately detect the rotation angle of the media presser, the result sometimes the media retainer and the head collides.
[0004]
　Also, according to Patent Document 2 includes a pressing member for pressing two edge portions in the width direction of the recording medium, respectively, and a detector for detecting the rotational angle of the pressing member. Then, by detecting in the detecting portion is configured to prevent a collision between the holding member and the head. However, the coupling portion of the recording medium depending on the positional relationship between the rotation axis of each pressing member, will be the pressing member is jumped, and as a result, is that the pressing member and the head collides.
[0005]
　Further, Patent Document 1, the apparatus described in Patent Document 2 are both, the head receiving the collision, may malfunction enough to affect to accurately eject ink occurs, in this case, it has been difficult or impossible to resume printing.
CITATION
Patent Document
[0006]
Patent Document 1: JP 2009-269254 Patent Publication
Patent Document 2: JP 2010-264596 JP
Summary of the Invention
Problems that the Invention is to Solve
[0007]
　An object of the present invention, when the first pressing portion or the second pressing portion is displaced, while reliably preventing the printing unit to collide with the presser portion and the displacement, after which the printing unit is printing operation printing apparatus capable of quickly resume is to provide a printing method and a control device.
Means for Solving the Problems
[0008]
　These objects are achieved by the present invention described below.
　Printing apparatus of the present invention, a band-shaped recording medium, a conveying portion for conveying in the longitudinal direction of the recording medium, while moving in the width direction of the recording medium, the printing unit that performs printing on the recording medium,
　wherein a first pressing portion for pressing the one side in the width direction of the recording medium,
　and a second pressing portion that presses the other side in the width direction of the recording medium,
　and vertical displacement of the first pressing portion, the second 2 of the pressing portion of the vertical displacement and the comprises a detector for detecting respectively, and
　said printing unit includes a when the displacement of the first pressing portion by the detecting unit is detected, the by the detection unit between when the displacement of the second pressing portion is detected, characterized by a different mobile.
[0009]
　Accordingly, when the first pressing portion is displaced, or, any of when the second pressing portion is displaced, it is possible to reliably prevent that the print portion pressing portion which is the displacement collide. Further, thereafter, pressing part that the displacement be returned to its original state can also be detected by the detecting unit, the printing operation of the printing unit after the detection can be quickly resumed.
[0010]
　In the printing apparatus of the present invention, the detection unit, when the displacement amount of the first pressing portion exceeds a threshold value, and the first pressing portion is displaced in the vertical direction, of the second pressing portion If the displacement amount exceeds the threshold value, preferably set to the second pressing portion is displaced in the vertical direction.
[0011]
　Thus, involuntary printing by the printing unit (unnecessarily) can be prevented from being stopped, thus, it is possible to prevent lowering of the production efficiency of the printing apparatus.
[0012]
　In the printing apparatus of the present invention, the first pressing portion and the second pressing portions each have a cantilevered by a plate piece,
　the detector, the end of the free end of the plate piece preferably, detecting the displacement.
[0013]
　End of the free end of the plate piece are the most displacement is larger portion in each holding portion, the detection of displacement of each pressing portion becomes easy and reliable.
[0014]
　In the printing apparatus of the present invention, the detector is either located at the end of the free end of the plate piece, or the plate piece of the free end side end portion of the oppositely disposed reflective to preferably it has an optical sensor.
[0015]
　Thus, with a simple configuration, the displacement of each pressing portion can be detected accurately and reliably.
[0016]
　In the printing apparatus of the present invention, the detection unit, the has a reflection portion for reflecting light from the optical sensor,
　the optical sensor is arranged at the end of the free end of the plate piece,
　the reflection parts are preferably provided over a range of up to above the second holding portion from above the first pressing portion.
[0017]
　Thus, the reflection portion than individually provided in correspondence with the optical sensor, it is possible to suppress the number of parts.
[0018]
　In the printing apparatus of the present invention, the printing unit, the first and the movement limit position where the movement limitation by the first pressing portion, the second movement limit position where the movement limitation with the second pressing portion being movable between a,
　range of movement can move the printing section has a first region of the first movement limit position to above the first pressing portion, the first pressing portion a second region from the upper to the upper of the second holding portion, said from above the second holding part from being divided into a third area to the second movement limit position preferred.
[0019]
　Thus, depending on the case where the first pressing portion is pressing portion of the case of displaced second is displaced, the control of various operating pattern of the printed portion becomes easy.
[0020]
　In the printing apparatus of the present invention, the printing unit, when the displacement of the first pressing portion in a state of being positioned in the second area is detected, to stop the printing standby in the second region It preferred to move or to said third region is.
[0021]
　Thus, the printing unit to the first pressing portion that is displaced can be reliably prevented from colliding.
[0022]
　In the printing apparatus of the present invention, when the printing unit is moved to or the third region waits in the second region, the transport unit, the original state before the first pressing portion is displaced preferably up to carry out the conveyance of the recording medium back.
[0023]
　Accordingly, the first pressing portion can return to ensure the original state before the displacement, it is possible to move the subsequent printing unit.
[0024]
　In the printing apparatus of the present invention, when the first pressing portion makes a conveyance of the recording medium by the conveying portion to return to the original state before the displacement, preferably to resume the printing.
[0025]
　Thus, the printing by the printing unit can be quickly restarted, thus, it is possible to prevent as much as possible a reduction in the production efficiency of the printing apparatus.
[0026]
　If the printing apparatus of the present invention, the printing unit, the displacement of one of the pressing portion of said first pressing portion and the second pressing portion is detected in a state of being positioned in the first region, preferably it waits in the first region.
[0027]
　Thus, the printing unit to the holding portion of one of the displacement can be reliably prevented from colliding.
[0028]
　In the printing apparatus of the present invention, when the printing unit is waiting in the first region, the transport unit, to carry out the conveyance of the recording medium to the holding portion of the one returns to the original state before displacement preferable.
[0029]
　This allows one of the pressing portion is returned to ensure the original state before the displacement, it is possible to move the subsequent printing unit.
[0030]
　In the printing apparatus of the present invention, when the pressing portion of the one makes a conveyance of the recording medium by the conveying portion to return to the original state before the displacement, preferably to resume the printing.
[0031]
　Thus, the printing by the printing unit can be quickly restarted, thus, it is possible to prevent as much as possible a reduction in the production efficiency of the printing apparatus.
[0032]
　In the printing apparatus of the present invention is moved, the printing unit, when the displacement of the second pressing portion in a state of being positioned in the second area is detected, to stop the printing, to the first region it is preferable to.
[0033]
　Thus, the printing unit to a second pressing portion that is displaced can be reliably prevented from colliding.
[0034]
　In the printing apparatus of the present invention, when the printing unit is moved to the first region, the transport unit may carry out the conveyance of the recording medium to the second pressing portion is returned to its original state before the displacement It is preferred.
[0035]
　Thus, the second pressing portion can return to ensure the original state before the displacement, it is possible to move the subsequent printing unit.
[0036]
　In the printing apparatus of the present invention, when the second pressing portion makes a conveyance of the recording medium by the conveying portion to return to the original state before the displacement, preferably to resume the printing.
[0037]
　Thus, the printing by the printing unit can be quickly restarted, thus, it is possible to prevent as much as possible a reduction in the production efficiency of the printing apparatus.
[0038]
　If the printing apparatus of the present invention, the printing unit, the displacement of one of the pressing portion of said first pressing portion and the second pressing portion is detected in a state of being positioned in the third region, preferably, waiting in the third region.
[0039]
　Thus, the printing unit to the holding portion of one of the displacement can be reliably prevented from colliding.
[0040]
　In the printing apparatus of the present invention, when the printing unit is waiting in the third region, the transport unit, to carry out the conveyance of the recording medium to the holding portion of the one returns to the original state before displacement preferable.
[0041]
　This allows one of the pressing portion is returned to ensure the original state before the displacement, it is possible to move the subsequent printing unit.
[0042]
　In the printing apparatus of the present invention, when the pressing portion of the one makes a conveyance of the recording medium by the conveying portion to return to the original state before the displacement, preferably to resume the printing.
[0043]
　Thus, the printing by the printing unit can be quickly restarted, thus, it is possible to prevent as much as possible a reduction in the production efficiency of the printing apparatus.
[0044]
　Printing method of the present invention is characterized by performing printing on a recording medium by using a printing apparatus of the present invention.
[0045]
　Accordingly, when the first pressing portion is displaced, or, any of when the second pressing portion is displaced, it is possible to reliably prevent that the print portion pressing portion which is the displacement collide. Further, thereafter, pressing part that the displacement be returned to its original state can also be detected by the detecting unit, the printing operation of the printing unit after the detection can be quickly resumed.
[0046]
　Control device of the present invention is a control device for controlling the printing apparatus of the present invention,
　and when the displacement of the first pressing portion is detected, and when the displacement of the second pressing portion is detected in, and controlling so as to the different mobile to the printing unit.
[0047]
　Accordingly, when the first pressing portion is displaced, or, any of when the second pressing portion is displaced, it is possible to reliably prevent that the print portion pressing portion which is the displacement collide. Further, thereafter, pressing part that the displacement be returned to its original state can also be detected in the detection unit, the printing operation of the printing unit after the detection can be quickly resumed.
BRIEF DESCRIPTION OF THE DRAWINGS
[0048]
[1] Figure 1 is a side view showing an embodiment of a printing apparatus of the present invention.
FIG. 2 is a block diagram of the main part of the printing apparatus shown in FIG.
FIG. 3 is a view seen from an arrow A direction in FIG.
[4] FIG. 4 is a view from the arrow B direction in FIG. 3.
FIG. 5 is a diagram showing a state where the first pressing portion is displaced from the state shown in FIG.
FIG. 6 is a diagram illustrating a first operation pattern of the printing apparatus shown in FIG. 1 in order.
[7] FIG. 7 is a diagram showing a first operation pattern of the printing apparatus shown in FIG. 1 in order.
[8] FIG. 8 is a diagram illustrating a first operation pattern of the printing apparatus shown in FIG. 1 in order.
[9] FIG. 9 is a diagram illustrating a first operation pattern of the printing apparatus shown in FIG. 1 in order.
[10] FIG 10 is a diagram showing a second operation pattern of the printing apparatus shown in FIG. 1 in order.
[11] FIG 11 is a diagram showing a second operation pattern of the printing apparatus shown in FIG. 1 in order.
[12] FIG 12 is a diagram showing a second operation pattern of the printing apparatus shown in FIG. 1 in order.
[13] FIG 13 is a diagram showing a third operation pattern of the printing apparatus shown in FIG. 1 in order.
[14] FIG 14 is a diagram showing a third operation pattern of the printing apparatus shown in FIG. 1 in order.
[15] FIG 15 is a diagram showing a third operation pattern of the printing apparatus shown in FIG. 1 in order.
[16] FIG 16 is a diagram showing a third operation pattern of the printing apparatus shown in FIG. 1 in order.
[17] FIG 17 is a diagram showing a fourth operation pattern of the printing apparatus shown in FIG. 1 in order.
[18] FIG 18 is a diagram showing a fourth operation pattern of the printing apparatus shown in FIG. 1 in order.
[19] FIG 19 is a diagram showing a fourth operation pattern of the printing apparatus shown in FIG. 1 in order.
[20] FIG 20 is a diagram showing a second embodiment of a printing apparatus of the present invention.
DESCRIPTION OF THE INVENTION
[0049]
　Hereinafter, the printing apparatus of the present invention will be described in detail with reference to preferred embodiments illustrating the printing method and a control device in the accompanying drawings.
[0050]
　
FIG 1 is a side view showing an embodiment of a printing apparatus of the present invention. Figure 2 is a block diagram of the main part of the printing apparatus shown in FIG. Figure 3 is a view seen from an arrow A direction in FIG. Figure 4 is a view from the arrow B direction in FIG. 3. Figure 5 is a diagram showing a state where the first pressing portion is displaced from the state shown in FIG. 6-9 are diagrams showing the first operation pattern of the printing apparatus shown in FIG. 1 in order. 10 to 12 are diagrams showing the second operation pattern of the printing apparatus shown in FIG. 1 in order. 13 to 16 are diagrams showing a third operation pattern of the printing apparatus shown in FIG. 1 in order. 17 to 19 are diagrams showing a fourth operation pattern of the printing apparatus shown in FIG. 1 in order. In the following, for convenience of description, the "X direction" a direction of depth of the page in FIG. 1, the left-right direction "Y direction", a vertical direction referred to as "Z direction". Further, coordinate axes in FIGS. 3 to 19 (Fig. 20 as well), respectively, it corresponds to the coordinate axis in FIG.
[0051]
　Printing device 1 of the present invention, while conveying the workpiece W as a recording medium, a textile printing apparatus for performing printing on the workpiece W, it is possible to perform the printing process of the present invention.
[0052]
　As shown in FIGS. 1 and 2, the printing apparatus 1 includes a machine base 11, a conveying unit 12 for conveying the workpiece W, a printing unit 13 for performing applied to printed ink on the workpiece W, the printing section 13 a moving unit 14 for moving the, a drying unit 16 for drying the ink on the workpiece W, input of various conditions at the time of printing, an input operation unit 18 that setting is performed, the control unit for controlling the operation of these units, respectively and a 15 (control device of the present invention). The printing apparatus 1 includes a control unit 15 is the external electric power source 200 electrically connected to the.
[0053]
　In the present embodiment, directions X direction perpendicular to the conveying direction for conveying the workpiece W, the direction to a direction parallel to the conveying direction orthogonal to the Y direction, X direction and Y direction is a Z direction.
[0054]
　Conveying section 12 includes a feeding device 3 for feeding the workpiece W to form a long strip which is wound into a roll, a winding device 4 for winding the printed workpiece W, is arranged on the machine base 11, and a support device 5 for supporting the workpiece W at the time of printing.
[0055]
　Feeding device 3 is disposed in the feed direction (Y-direction) upstream of the workpiece W than the machine base 11. Feeding device 3, the workpiece W is wound into a roll, tensioner 32 multiplying the delivery roller (supply reel) 31 sends the workpiece W, the delivery tension in the workpiece W between the supporting device 5 and the rollers 31 and it has a door. Delivery roller 31, a motor (not shown) is connected can be rotated by the operation of the motor.
[0056]
　Note that the workpiece W has an ink absorbency, thin, film-like sheet having an ink non-absorbent, it is possible to use a thin film-like sheet. In the former case, for example, plain paper, high quality paper, and ink-jet recording special paper such as glossy paper, Other, woven fabric, and the like. In the latter case, for example, no surface treatment for ink jet printing (i.e., not to form an ink absorbing layer) plastic film, as well as and those plastics are coated on a substrate such as paper plastic film There are those that are bonded. As the plastic, but are not limited to, for example, polyvinyl chloride, polyethylene terephthalate, polycarbonate, polystyrene, polyurethanes, polyethylene, and polypropylene.
[0057]
　Winding device 4, to the feeding device 3 is disposed in the feed direction (Y-direction) downstream of the workpiece W than the machine base 11. Winding device 4, the take-up roller (winding reel) 41 for taking up the workpiece W into a roll, a tensioner 42, 43 and 44 to apply a tension to the work W between the supporting device 5 and the take-up roller 41 have. Winding roller 41, a motor (not shown) is connected can be rotated by the operation of the motor. Tensioner 42-44 are spaced respectively, apart in this order in a direction away from the winding roller 41.
[0058]
　Supporting device 5 is disposed between the feeding device 3 and the winding device 4. Supporting device 5, a main driving roller 51 and driven roller 52 which are spaced from each other in the Y direction, and the endless belt (belt) 53 stretched and the main driving roller 51 and driven roller 52, a main driving roller 51 driven and a tensioner 54 and 55 for applying a tension to the workpiece W between the roller 52.
[0059]
　Main driving roller 51, a motor (not shown) is connected can be rotated by the operation of the motor. The driven roller 52 may be a rotational force of the driving roller 51 via the endless belt 53 is transmitted to rotate in conjunction with the main driving roller 51.
[0060]
　The endless belt 53 is a glue belt adhesive layer formed with an adhesive to the surface of the front side. Some of the work W in the adhesive layer is adhesive fixed, longitudinal direction of the workpiece W, i.e., is conveyed in the Y direction. Then, during this transport, the printing is to be performed stably in the workpiece W. Moreover, after the printing has been performed, the workpiece W is separated from the endless belt 53.
[0061]
　Tensioners 54 and 55, like the main driving roller 51 and driven roller 52 are spaced apart from each other in the Y direction.
[0062]
　Tensioner 54 may sandwich the workpiece W and the endless belt 53 your between the main driving roller 51, the tensioner 55 can sandwich the workpiece W and the endless belt 53 your between the driven roller 52. Accordingly, the workpiece W which tension is applied by the tensioner 54 and 55 is conveyed and is fixed to left endless belt 53 in a state where the tension is applied. Such a state, the workpiece W is prevented from or closer, for example, wrinkles or the like during conveyance, thus, when subjected to printing, the printing is accurate and high quality.
[0063]
　Printing unit 13, ink can be a discharging droplets D on the workpiece W that has been conveyed by the conveying unit 12 (see FIG. 3). This makes it possible to droplet D lands on the workpiece W, thus, the the workpiece W, rendering by the printing (recording) is performed. The ink is obtained by containing a dye or pigment as a coloring agent in water as solvent, black in this embodiment (K), 4 colors of cyan (C), magenta (M), yellow (Y) It is used.
[0064]
　The printing unit 13 includes a carriage unit 131 having a plurality of inkjet heads which are divided for each color of ink (ink ejection head). In the printer 1, as well as intermittent feeding (sub-scanning) in the Y-direction in a fixed state where the adhesive fixing the Repetitive out the workpiece W by the feeding device 3 in the endless belt 53, the movement unit the carriage unit 131 to the workpiece W in a fixed state 14 ejects ink from the carriage unit 131 while reciprocating (main scanning) in the X direction (the width direction of the workpiece W) by. This was completed printing can be performed until the image is formed on the workpiece W. Incidentally, the resulting image may be by multicolor printing (color printing), it may be by a single color printing.
[0065]
　Moving portion 14 is movably supported along a print portion 13 in the X direction during printing. Thus, the printing unit 13 can be reciprocated so as to straddle the upper work W, it is possible to impart ink onto the workpiece W therebetween (see FIG. 3).
[0066]
　4, as shown in FIG. 5, the mobile unit 14 includes a drive source 141 for moving the printing unit 13, extends along the X direction, and a frame 142 for supporting the drive source 141.
[0067]
　Driving source 141 is, for example, of the construction having a ball screw and a linear guide.
　Frame 142 in the present embodiment has a back plate 143 provided upright in the Z-direction, and a top plate 144 that protrudes from the back plate 143 in the X direction negative side.
[0068]
　As shown in FIG. 3, in the middle of the longitudinal direction of the back plate 143 includes a first pressing portion 2A for pressing the edge W1 of the right side in FIG. 3 of the workpiece W (one side in the width direction), the workpiece W a second pressing portion 2B is provided for pressing the edge W2 of the left side in FIG. 3 (one side in the width direction). Then, the printing unit 13 (carriage unit 131) includes a first moving limit position LT1 as the movement limitation by the first pressing portion 2A side, a second travel limit as the movement limitation with the second pressing portion 2B side it can be moved between a position LT2. The first movement limit position LT1 has a home position of the printing unit 13 (the normal standby position).
[0069]
　Further, between the first movement limit position LT1 and second movement limit position LT2, i.e., the print unit 13 moves the range A0 movable is includes a first movement limit position LT1 of the first pressing portion 2A the first region A1 to the upper, the second region A2 from above the first pressing portion 2A to above the second pressing portion 2B, the second movement limit from above the second pressing portion 2B it can be divided into a third area A3 to the position LT2. By separating in this manner the movement range A0 into three regions, it is easy to control the first operation pattern to fourth operation pattern will be described later.
[0070]
　Drying unit 16 is a conveyance direction downstream side of the workpiece W than the printing unit 13 is disposed between the take-up roller 41 of the supporting device 5 and the winding device 4. The drying unit 16 includes a chamber 161 which heater is incorporated. Accordingly, when the workpiece W passes through the chamber 161, the ink in the undried state located on the workpiece W, can be dried by the heat of the heater.
[0071]
　Note that both sides in the Y direction via the drying unit 16, the tensioner 42 and the tensioner 43 is disposed. Accordingly, the workpiece W can pass through the inside of the chamber 161 in a state in which tension is applied. Such a state, the workpiece W is prevented to wrinkled example during passing, therefore, can be reliably dried to the ink.
[0072]
　The input operation unit 18 is, for example, a touch panel or the like. Operator is the operator of the printing apparatus 1 is capable of inputting various conditions for printing through the input operation unit 18. The conditions are not particularly limited, for example, a print program, the conveying speed of the workpiece W, include thickness, and the like. The input operation unit 18 also serves as a display unit for displaying information in the printing apparatus 1.
[0073]
　Control unit 15, the transport unit 12, printing unit 13, the moving unit 14, drying unit 16 is connected detector 6 and an input operation unit 18 electrically, it has a function of controlling these operating respectively there. 2, the control unit 15 includes a CPU (Central Processing Unit) 151, a storage unit 152.
[0074]
　CPU151 executes the program for various processes such as the print process as described above.
　Storage unit 152 has, for example, a EEPROM (Electrically Erasable Programmable Read-Only Memory) or the like which is a kind of nonvolatile semiconductor memory capable of storing various programs.
[0075]
　The control unit 15, for example, an external power supply source 200 for applying a voltage of 200V are electrically connected. Thus, power is supplied to each part of the printing apparatus 1.
[0076]
　As described above, the frame 142 includes a first pressing portion 2A for pressing the edge W1 of the workpiece W, and the second pressing portion 2B for pressing the edge W2 of the workpiece W is provided (see FIG. 3 ). The first pressing portion 2A and the second pressing portion 2B, except that the arrangement position is different, since the same configuration, hereinafter, representatively described first pressing portion 2A.
[0077]
　As shown in FIG. 4, the first pressing portion 2A has been formed by bending an elongated plate piece, the end is cantilevered. The first pressing portion 2A is supported by the back plate 143 of the frame 142, a fixed stationary unit 21, abuts the abutting portion 22 to the edge W1 of the workpiece W, inclined with respect to the abutment 22 and an inclined portion 23. The first pressing portion 2A is preferably made of stainless steel having elasticity.
[0078]
　Fixing unit 21 is fixed to the back plate 143 of the frame 142 through, for example, bolts (not shown).
[0079]
　Abutment 22 extends toward the Y-direction positive side from the lower end portion of the fixed portion 21. Then, the abutting portion 22 abuts the edge W1 of the workpiece is W, the said edges W1 can be pressed onto the endless belt 53, i.e., can be sandwiched between the endless belt 53 . Thus, for example, edge W1 is or are folded to the back side of the workpiece W, even fluff has occurred at the edge W1, it is possible to suppress them, to prevent interference (collision) between the printing portion 13 . Accordingly, the workpiece W is maintained in a state suitable for printing, so that the stable and accurate printing is performed.
[0080]
　Inclined portion 23 is a portion extending further toward the Y direction positive side from the contact portion 22. The inclined portion 23 is inclined relative to abutment 22, in a state of being spaced apart from the workpiece W on the endless belt 53.
[0081]
　Meanwhile, as shown in FIG. 5, the workpiece W is fabric is more cemented serves (combined) as the junction W3 is formed. Each joint W3 is thicker than the portion of the front and rear. State the first pressing portion 2A and the second presser portion 2B, may get over the joint W3 during the conveyance of the workpiece W, in this case, the contact portion 22 is lifted from the workpiece W, that is, the deflected to become. The degree of lift, the printing unit 13 of moving in the X direction collides with abutment 22. Further, after the collision, deformation and breakage due to the collision can also be caused to the printing unit 13 and the contact portion 22, it is to continue printing becomes difficult or impossible. Therefore, in the printer 1, it has a valid configuration to eliminate this phenomenon. The following describes this configuration.
[0082]
　As shown in FIG. 3, the printing apparatus 1 is provided with a vertical displacement of the first pressing portion 2A, the detection unit 6 that detects respective vertical displacement and a second pressing portion 2B. Detector 6 is electrically connected to the control unit 15 (see FIG. 2).
[0083]
　The detection unit 6 has a first optical sensor 61A, a first reflecting member (reflecting portion) 62A, and a second optical sensor 61B, and a second reflecting member (reflecting portion) 62B .
[0084]
　4, as shown in FIG. 5, the first reflecting member 62A, the free end side as possible abutment 22 of the first pressing portion 2A, that is, disposed at a portion close to the inclined portion 23, is fixed there. First optical sensor 61A is a reflective optical sensor, opposite the first reflecting member 62A, disposed on the top plate 144 of the frame 142, is fixed.
[0085]
　Outgoing light L1 emitted from the first optical sensor 61A is reflected by the first reflecting member 62A, it is received by the first optical sensor 61A as reflected light L2, built in the first optical sensor 61A and form an image on the light receiving element is. The imaging position, the first optical sensor 61A and the distance M (see FIGS. 4 and 5) between the first reflecting member 62A is different by. Then, the detected distance M on the basis of the imaging position can be a vertical displacement amount of the contact portion 22 of the first pressing portion 2A. Incidentally, a detection portion for detecting the vertical displacement of the first pressing portion 2A, was the portion close to the free end side as possible abutment 22, the portion in the first holding portion 2A since in the most displacement amount is large portion, because of the displacement detection becomes easy and reliable.
[0086]
　Second reflecting member 62B is arranged at a portion closer to the free end side as possible abutment 22 of the second pressing portion 2B, it is fixed. The second optical sensor 61B, similarly to the first optical sensor 61A, a reflective optical sensor, to face the second reflection member 62B, disposed on the top plate 144 of the frame 142, is fixed . Incidentally, the principle for detecting the vertical displacement of the second pressing portion 2B is the same as the principle of detecting the vertical displacement of the first pressing portion 2A described above.
[0087]
　Printing device 1 includes a detection result of the detection unit 6, the position of the printing unit 13, i.e., a printing unit 13 position information of where your located out of the third region A3 from the first area A1 depending on, it is possible to run four operation patterns. The position information of the print unit 13, for example, obtained from the encoder built in the drive source 141 for moving the printing unit 13.
[0088]
　The first operation pattern of the four operation patterns is a first operation pattern shown in FIGS. 6-9. The second operation pattern is a second operation pattern shown in FIGS. 10 to 12. The third operation pattern is a third operation pattern shown in FIGS. 13 to 16. Fourth operation pattern is a fourth operation pattern shown in FIGS. 17 to 19. The switching of the operation patterns is performed by CPU151 of the control unit 15, a program for executing the respective operation patterns, are stored in advance in the storage unit 152 of the control unit 15.
[0089]
　First, it will be described with reference to FIGS for the first operation pattern.
　In the state shown in FIG. 6, the printing unit 13 is located in the second region A2, it is performed printing by ejecting droplets D on the workpiece W during conveyance. The first pressing portion 2A are displaced by being pressed upward by the joint portion W3 of the workpiece W. This displacement is detected by the first optical sensor 61A (detector 6).
[0090]
　If the displacement of the first pressing portion 2A is detected, as shown in FIG. 7, to stop the ejection of droplets D from the printing unit 13, i.e., to stop the printing. Further, also stop moving within the second region A2 of the printing unit 13, to wait the print unit 13 as is in the second region A2. In addition to the possible to wait for the printing unit 13 in the second region A2, which may be moved the print unit 13 to the third region A3 (see Printing unit 13 shown by the two-dot chain line in FIG. 7) . The transport of the workpiece W, it is preferable to stop, it may be continued.
[0091]
　Then, to perform the transfer of the workpiece W by the transport unit 12 from the state shown in FIG. Thus, as shown in FIG. 8, any, the first pressing portion 2A can get over the joint W3 to cause displacement, and as a result, the return to the original state before the displacement. Moreover, the displacement, i.e., displacement caused to return to the original state is also detected by the first optical sensor 61A.
[0092]
　Then, if the displacement of the first pressing portion 2A is detected, as shown in FIG. 9, to resume printing by the printing unit 13.
[0093]
　By the first operation pattern, when the first pressing portion 2A is displaced, or to stop the movement of the printing unit 13 in the second region A2, or the first pressing portion 2A which is the displacement opposite, namely, it is possible to move the printing unit 13 in the third region A3 and. Thus, the printing unit 13 to the first pressing portion 2A displaced can be reliably prevented from colliding. Further, after the collision avoidance can be first pressing portion 2A Once restored to the original state, to quickly resume printing by the printing unit 13.
[0094]
　Next, it will be described with reference to FIGS. 10 to 12 for the second operation pattern.
　In the state shown in FIG. 10, the printing unit 13 is located in the first region A1, it is about to start now printing. The first pressing portion 2A are displaced by being pressed upward by the joint portion W3 of the workpiece W. This displacement is detected by the first optical sensor 61A. Then, if the displacement of the first pressing portion 2A is detected, to wait the print unit 13 as is in the first region A1.
[0095]
　Then, to perform the transfer of the workpiece W by the transport unit 12 from the state shown in FIG. 10. Thus, as shown in FIG. 11, one, first pressing portion 2A can get over the joint W3 to cause displacement, and as a result, the return to the original state before the displacement. Moreover, this displacement is also detected by the first optical sensor 61A.
[0096]
　Then, if the displacement of the first pressing portion 2A is detected, as shown in FIG. 12, the printing unit 13 is moved to the second area A2, to resume the printing.
[0097]
　By the second operation pattern, when the first pressing portion 2A is displaced, it is possible to wait for the printing unit 13 in the first region A1. Thus, the printing unit 13 to the first pressing portion 2A displaced can be reliably prevented from colliding. Further, after the collision avoidance can be first pressing portion 2A Once restored to the original state, to quickly resume printing by the printing unit 13. The second operation pattern is here has become the operation pattern when the first pressing portion 2A is displaced, it can be a second pressing portion 2B is the same operation pattern also displaced .
[0098]
　Next, it will be described with reference to FIGS. 13 to 16 for the third operation pattern.
　In the state shown in FIG. 13, the printing unit 13 is located in the second region A2, it is performed printing by ejecting droplets D on the workpiece W during conveyance. The second pressing portion 2B is displaced by being pressed upward by the joint portion W3 of the workpiece W. This displacement is detected by the second optical sensor 61B (detector 6).
[0099]
　If the displacement of the second pressing portion 2B is detected, as shown in FIG. 14, and stops the printing by the printing unit 13. Also, moving the printing unit 13 to the first region A1. The transport of the workpiece W, it is preferable to stop, it may be continued.
[0100]
　Then, to perform the transfer of the workpiece W by the transport unit 12 from the state shown in FIG. 14. Thus, as shown in FIG. 15, either, the second pressing portion 2B can get over the joint W3 to cause displacement, and as a result, the return to the original state before the displacement. Moreover, the displacement, i.e., displacement caused to return to the original state is also detected by the second optical sensor 61B.
[0101]
　Then, if the displacement of the second pressing portion 2B is detected, as shown in FIG. 16, the printing unit 13 is moved to the second area A2, to resume the printing.
[0102]
　Such third operation pattern, when the second pressing portion 2B is displaced, the printing unit 13, opposite to the second pressing portion 2B that the displacement, i.e., is moved to the first area A1 be able to. Thus, the printing section 13 to the second pressing portion 2B which is displaced can be reliably prevented from colliding. Further, after the collision avoidance can be the second pressing portion 2B is Once restored to the original state, to quickly resume printing by the printing unit 13.
[0103]
　Next, will be described with reference to FIGS. 17 to 19 a fourth operation pattern.
　In the state shown in FIG. 17, the printing unit 13 is located in the third region A3, trying to continue printing further moves to the second area A2. The second pressing portion 2B is displaced by being pressed upward by the joint portion W3 of the workpiece W. This displacement is detected by the second optical sensor 61B. Then, if the displacement of the second pressing portion 2B is detected to wait for the printing unit 13 as is in the third region A3.
[0104]
　Then, to perform the transfer of the workpiece W by the transport unit 12 from the state shown in FIG. 17. Thus, as shown in FIG. 18, either, the second pressing portion 2B can get over the joint W3 to cause displacement, and as a result, the return to the original state before the displacement. Moreover, this displacement is also detected by the second optical sensor 61B.
[0105]
　Then, if the displacement of the second pressing portion 2B is detected, as shown in FIG. 19, the printing unit 13 is moved to the second area A2, to resume the printing.
[0106]
　Such fourth operation pattern, when the second pressing portion 2B is displaced, it is possible to wait for the printing unit 13 in the third region A3. Thus, the printing section 13 to the second pressing portion 2B which is displaced can be reliably prevented from colliding. Further, after the collision avoidance can be the second pressing portion 2B is Once restored to the original state, to quickly resume printing by the printing unit 13. The fourth operation pattern is here has become the operation pattern when the second pressing portion 2B displaced, it is possible to first pressing portion 2A is the same operation pattern also displaced .
[0107]
　In the printer 1 as described above, the printing unit 13, and when the displacement of the first pressing portion 2A by the detector 6 is detected, when the displacement of the second pressing portion 2B by the detection unit 6 is detected and in, the different mobile, i.e., the moving direction (destination) is different. Also the movement amount "standby (stop)" is a zero, and be included in one embodiment of the mobile.
[0108]
　Such control as described above, when the first pressing portion 2A is displaced, or, any of when the second pressing portion 2B is displaced, the printing unit 13 collides with the pressing portion which is the displacement it is possible to prevent the reliability. Further, it is possible to quickly resume the printing operations of subsequent printing unit.
[0109]
　Further, regardless of the displacement of the first pressing portion 2A, the first than the pressing portion 2A is determined to have displaced, neither stops the printing by the printing unit 13 with a minute displacement collision does not occur Banara not a decrease in production efficiency of the printing apparatus 1 is concerned. This concern is also true for the displacement of the second pressing portion 2B.
[0110]
　Therefore, setting the first threshold value of the displacement amount of the first pressing portion 2A that would crash occurs, when the actual displacement amount of the first pressing portion 2A exceeds the first threshold value, the 1 of the pressing portion 2A and displaced.
[0111]
　Similarly, to set a second threshold value of the displacement amount of the second pressing portion 2B that would crash occurs, when the actual displacement amount of the second pressing portion 2B exceeds the second threshold value, the second pressing portion 2B is the displaced.
[0112]
　By performing the determination of the presence or absence of displacement on the basis of such first threshold value and second threshold value, disappointing printing by the printing unit 13 (unnecessarily) it can be prevented from being stopped . The first threshold or the second threshold value, as a pre-designed value, or has been experimentally determined, are stored in the storage unit 152.
[0113]
　
FIG. 20 is a diagram showing a second embodiment of a printing apparatus of the present invention.
[0114]
　Hereinafter, the printing apparatus of the present invention with reference to this drawing, a description of a second embodiment of a printing method and a control apparatus will be described by focusing on differences from the embodiment described above, the same matters will their description omitted.
[0115]
　This embodiment, except that the arrangement position of the optical sensor and the reflective portion is the same as the first embodiment.
[0116]
　In the printer 1 of this embodiment shown in FIG. 20, the first optical sensor 61A is arranged at a portion closer to the free end side as possible abutment 22 of the first pressing portion 2A, is fixed. The second optical sensor 61B is arranged at a portion closer to the free end side as possible abutment 22 of the second pressing portion 2B, it is fixed.
[0117]
　The reflecting member 63, over a range of from above the abutting portion 22 of the first pressing portion 2A to above the abutting portion 22 of the second pressing portion 2B (second region A2), the ceiling frame 142 It is provided in the plate 144. This makes it possible to the first optical sensor 61A and the second optical sensor 61B share a single reflecting member 63, thus, it is possible to suppress the number of parts.
[0118]
　Above, the printing apparatus of the present invention have been described for the embodiment shown a printing method and a control apparatus, the present invention is not limited thereto. Parts constituting the printing apparatus and the control device can be replaced with an arbitrary configuration capable of exhibiting the same function. Or it may be added with a arbitrary structures.
[0119]
　The printing apparatus of the present invention, a printing method and a control device, among the respective embodiments, it may be a combination of any two or more configurations (features).
[0120]
　The detecting unit, the was the sensor of the so-called "contactless" In each embodiment is not limited thereto, for example, may be a sensor of the "contact".
DESCRIPTION OF SYMBOLS
[0121]
　1 ... printing apparatus, 2A ... first pressing portion, 2B ... second pressing portion, 21 ... fixed portion, 22 ... contact portion, 23 ... inclined portion, 3 ... feeding device, 31 ... delivery roller (supply reel ), 32 ... tensioner, 4 ... retractor, 41 ... winding rollers (winding reel), 42 ... tensioner, 43 ... tensioner, 44 ... tensioner, 5 ... supporting device, 51 ... main driving roller, 52 ... driven roller, 53 ... endless belt (belt), 54 ... tensioner, 55 ... tensioner, 6 ... detection unit, 61A ... first optical sensor, 61B ... second optical sensor, 62A ... first reflecting member (reflecting portion) 62B ... second reflecting member (reflecting portion), 63 ... reflection member, 11 ... machine stand, 12 ... transport unit, 13 ... printing section, 131 ... carriage unit, 14 ... mobile unit, 141 ... driving source, 142 ... frame , 143 ... back plate, 144 ... top plate, 15 ... control unit, 151 ... CPU (Central Processing Unit), 152 ... storage unit, 16 ... drying unit, 161 ... chamber, 18 ... input operating unit, 200 ... external power supply source, A0 ... moving range, A1 ... first area, A2 ... second area, A3 ... third region, D ... liquid droplets, L1 ... exit light, L2 ... reflected light, LT1 ... first movement limit position, LT2 ... second movement limit position, M ... distance, W ... workpiece, W1 ... edge, W2 ... edge, W3 ... joint

claims

A strip of the recording medium, a conveying portion for conveying in the longitudinal direction of the recording medium,
　while moving in the width direction of the recording medium, and a printing unit that performs printing on the recording medium,
　one of a width direction of the recording medium a first pressing portion for pressing the side,
　and a second pressing portion that presses the other side in the width direction of the recording medium,
　and vertical displacement of the first pressing portion, the vertical direction of the second pressing portion comprising a detector for detecting the displacement and, respectively, the,
　the printing unit includes a when the displacement of the first pressing portion by the detecting unit is detected, displacement of the second pressing portion by the detecting unit There printing apparatus characterized by between when detected, a different mobile.
[Requested item 2]
　Wherein the detection unit, when the displacement amount of the first pressing portion exceeds a threshold value, and the first pressing portion is displaced in the vertical direction, the displacement amount of the second pressing portion is greater than a threshold value If printing apparatus according to claim 1, wherein the second pressing portion is displaced in the vertical direction.
[Requested item 3]
　The first pressing portion and the second pressing portions each have a cantilevered by a plate piece,
　the detecting unit, the claims for detecting the displacement of the end portion of the free end of the plate piece the printing apparatus according to 1 or 2.
[Requested item 4]
　Wherein the detection unit is either located at the end of the free end of the plate piece, or claim 3 having a reflection type optical sensor disposed opposite to an end portion of the free end of the plate piece the printing apparatus according to.
[Requested item 5]
　Wherein the detection unit includes a reflection part that reflects the light from the optical sensor,
　the optical sensor is arranged at the end of the free end of the plate piece,
　the reflection portion, the first printing device according to the upper pressing unit in claim 4 is provided over a range of up to above the second pressing portion.
[Requested item 6]
　The printing unit is movable between the first and the movement limit position where the movement limitation by the first pressing portion, and the second movement limit position where the movement limitation with the second pressing portion There,
　the movement range the printing unit is movable in a first movement limit position and the first region to above the first pressing portion, upwardly from said second of said first holding portion a second region of to above the pressing portion, according to any one of the third of claims 1 divided into a region 5 from above the second holding portion to the second movement limit position of the printing apparatus.
[Requested item 7]
　The printing unit, when the displacement of the first pressing portion in a state of being positioned in the second area is detected, to stop the printing, or the third waiting in the second region the printing apparatus according to claim 6 to move to the area.
[Requested item 8]
　If the printing unit is moved to the one or the third region waits in the second region, the transport unit, the transport of the recording medium to the first pressing portion is returned to its original state before the displacement the printing apparatus according to claim 7 for performing.
[Requested item 9]
　If the first pressing portion makes a conveyance of the recording medium by the conveying portion to return to the original state before the displacement, the printing apparatus according to resume claim 8 the printing.
[Requested item 10]
　The printing unit, when the displacement of the one pressing portion of the first said state located in the region of the first pressing portion and the second pressing portion is detected, the waiting in the first region printing apparatus according to any one of claims 6 to 9.
[Requested item 11]
　If the printing unit is waiting in the first region, the transport unit, the printing apparatus according to claim 10, the pressing portion of the one to perform the conveyance of the recording medium to return to the original state before the displacement.
[Requested item 12]
　If the pressing portion of the one makes a conveyance of the recording medium by the conveying portion to return to the original state before the displacement, the printing apparatus according to resume claim 11 said printing.
[Requested item 13]
　The printing unit, when the displacement of the second pressing portion in a state of being positioned in the second area is detected, to stop the printing of claims 6 to 12 to move to the first region printing apparatus according to any one.
[Requested item 14]
　If the printing unit is moved to the first region, the transport unit, the printing apparatus according to claim 13, wherein the second pressing portion for conveying the recording medium to return to the original state before the displacement .
[Requested item 15]
　Wherein when the second pressing portion makes a conveyance of the recording medium by the conveying portion to return to the original state before the displacement, the printing apparatus according to resume claim 14 said printing.
[Requested item 16]
　The printing unit, when the displacement of one of the pressing portion of said first pressing portion and the second pressing portion is detected in a state of being positioned in the third region, waiting in the third region printing apparatus according to any one of claims 6 to 15.
[Requested item 17]
　If the printing unit is waiting in the third region, the transport unit, the printing apparatus according to claim 16, the pressing portion of the one to perform the conveyance of the recording medium to return to the original state before the displacement.
[Requested item 18]
　If the pressing portion of the one makes a conveyance of the recording medium by the conveying portion to return to the original state before the displacement, the printing apparatus according to resume claim 17 said printing.
[Requested item 19]
　Printing method characterized by performing printing on a recording medium by using a printing apparatus according to any one of claims 1 to 18.
[Requested item 20]
　A controller for controlling the printing apparatus according to any one of claims 1 to 18,
　and when the displacement of the first pressing portion is detected, displacement of the second pressing portion is detected and, the control apparatus characterized by controls to different moving to the printing unit when the.