JP3431917B2 - Inkjet printer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet printer, and more particularly, to a small ink jet printer having a narrow width of a run-up portion and an overrun portion of an ink carriage.

[0002]

2. Description of the Related Art Referring to FIG. 42, a conventional ink jet printer 201 has a scanning guide 204 made of a linear metal rod and a linear movement along the scanning guide 204 to eject ink onto a recording paper 62. , And an ink carriage 203 for performing printing. Ink carriage 20
The ink carriage 203
An area called an run-up section provided to allow the ink carriage 203 to move from a stopped state to a certain speed, and an area called an overrun section provided to stop the ink carriage 203 moving at a constant speed are provided. ing. That is, the ink carriage 203 has the scanning guide 204.
When printing is performed from the position A to the position B in the drawing along the line, the run-up portion performs the run-up. Then, in the print area, printing is performed at a constant speed. When it reaches the overrun portion beyond the print area, the ink carriage 20
3 decelerates and then stops. The change in speed of the ink carriage 203 during this time is as shown in the figure.

On the other hand, referring to FIG. 43, the ink jet printer 301 conveys the recording paper 62 and
A heat roller 304 for applying heat to the recording paper 62 to forcibly dry the ink ejected on the recording paper 62.
A recording head 305 provided at a position facing the heat roller 304 for ejecting ink onto the recording paper 62 for printing, and an exhaust fan 306 for discharging heat accumulated in the inkjet printer 301 to the outside. Including and The recording paper 62 is heated by the heat roller 304, and ink is ejected onto the recording paper 62 by the recording head 305 to perform printing. After printing, the recording paper 62 is continuously heated by the same method. As a result, the ink ejected onto the recording paper 62 is dried (for example, refer to Patent Document 1).

[0004]

[Patent Document 1] Japanese Patent Application Laid-Open No. 8-258254

[0005]

However, the ink jet printer 201 requires the run-up portion and the overrun portion in addition to the printing area. Therefore, an area other than the area originally required for printing is required in the inkjet printer 201, which is an obstacle to downsizing the inkjet printer 201. Note that the inkjet printer 301 also has the same problem because printing is performed by a similar method.

In the ink jet printer 301, the entire heat roller 304 radiates heat, and the heat is also radiated to portions other than the recording paper 62. Further, the heat roller 304 dries one horizontal row of the recording paper 62 at a time. Therefore, the heat roller 304 itself becomes large and the amount of heat generated from the heat roller 304 also becomes large. As a result, the inkjet printer 301 becomes larger,
The power consumption of the inkjet printer 301 increases.
Further, since the distance between the heat roller 304 and the recording head 305 is structurally very small, heating the recording head 305 causes a problem such as deterioration of ink.
In order to reduce the influence of this heat, the exhaust fan 306
However, a space for installing the exhaust fan 306 is required, and electric power for driving the exhaust fan 306 is also required. Also in this respect, the inkjet printer 301 becomes large and the power consumption of the inkjet printer 301 increases.

The present invention has been made to solve the above problems, and an object thereof is to provide a small ink jet printer.

Another object of the present invention is to provide an ink jet printer which is small and has a large number and density of ink heads arranged on an ink carriage.

Still another object of the present invention is to provide an ink jet printer which is small in size and has no misalignment between dots during printing.

Still another object of the present invention is to provide an ink jet printer which is small in size, has no misalignment between dots during printing, and can be printed without arc-shaped distortion.

Still another object of the present invention is an ink jet printer which is small in size, has no misalignment between dots at the time of printing, can be printed without arcuate distortion, and can dry ink printed with a small amount of electric power. Is to provide.

Yet another object of the present invention is to provide an ink jet printer capable of drying printed ink without altering or solidifying the ink in the ink carriage.

Still another object of the present invention is to provide an ink jet printer capable of drying printed ink without causing deterioration of the ink ejected on the recording paper and deformation of the recording paper.

Still another object of the present invention is that the hot air generated from the heat generating device does not deteriorate or solidify the ink in the ink carriage, and the wind pressure causes the flight of ink droplets ejected from the ink carriage. It is an object of the present invention to provide an inkjet printer that can dry printed ink without the need.

Still another object of the present invention is to dry printed ink without causing erroneous ejection of ink from an ink carriage or disturbance of printed figures or characters due to vibration of a heat generating device. An object is to provide an inkjet printer.

Still another object of the present invention is to provide an ink jet printer which is compact and capable of high speed printing.

[0017]

According to another aspect of the present invention, there is provided an ink jet printer having two support shafts rotatably provided around two predetermined shafts arranged at predetermined intervals and two support shafts. It has two columns fixed to the two support shafts so as to perform an arc motion around the two shafts as the shaft rotates, and a plurality of ink heads provided at predetermined positions from the support shafts of the two columns. Ink carriage,
A control unit for controlling the feeding of the recording paper, the rotational movement of the two support shafts, and the ejection of ink from the plurality of ink heads.

According to the first aspect of the present invention, the two support shafts, the ink carriage and the two columns form a link mechanism. Therefore, the ink carriage can perform a reciprocating arc motion, and even if the run-up portion and the overrun portion having the same distance as the conventional one are provided along the arc, the lateral widths of the run-up portion and the overrun portion are respectively the conventional inkjet printer. It becomes narrower. Therefore, the inkjet printer can be downsized. Further, since the ink carriage moves while maintaining the same posture, the scanning speeds of the ink heads are all the same. Therefore, there is no problem of misalignment between dots at the time of printing, which is caused by the difference in scanning speed between ink heads.

According to a second aspect of the invention, in addition to the configuration of the first aspect of the invention, the control means converts the image data based on the curvature of the locus during the reciprocating arc motion of the ink carriage, and converts the image data. Means for controlling the paper feed of the recording paper, the rotational movement of the two support shafts, and the ejection of ink from the plurality of ink heads based on the subsequent image data.

According to a second aspect of the invention, in addition to the action and effect of the first aspect of the invention, the image data is converted based on the curvature of the locus during the reciprocating arc movement of the ink carriage, and the image data after conversion is converted. Printing is performed based on the image data. Therefore, even if the ink carriage moves in an arc shape, it is possible to perform printing without arc distortion.

According to a third aspect of the present invention, in addition to the configuration of the first aspect of the invention, the control means includes means for preparing image data for one page, and reciprocating arc movement of the ink carriage. The prepared image data for one page is converted based on the curvature of the locus, and based on the converted image data, the paper feed of the recording paper, the rotational movement of the two support shafts, and the ink ejection from the plurality of ink heads. And means for performing control of.

According to a third aspect of the present invention, in addition to the operation and effect of the first aspect of the invention, after the image data for one page is prepared, the curvature of the locus during the reciprocating arc movement of the ink carriage. The image data is converted based on the above, and printing is performed based on the converted image data. Therefore, even if the ink carriage moves in an arc shape, it is possible to perform printing without arc distortion.

According to a fourth aspect of the present invention, in addition to the configuration of the first aspect of the invention, the control means is means for sequentially preparing a predetermined number of lines of data obtained by dividing one page of image data. And, based on the curvature of the locus during the reciprocating arc motion of the ink carriage, convert the data of the prescribed number of lines prepared,
Means for controlling the paper feed of the recording paper, the rotational movement of the two support shafts, and the ejection of ink from the plurality of ink heads based on the converted data.

According to a fourth aspect of the invention, in addition to the action and effect of the first aspect of the invention, image data for each predetermined number of lines are sequentially prepared, and the curvature of the locus during reciprocating arc movement of the ink carriage. A predetermined number of lines of image data is converted based on the above, and printing is performed based on the converted image data. Therefore, even when the image data can be obtained only every one line or every few lines, such as image data obtained from a facsimile, it is possible to perform printing without distortion in an arc shape.

In addition to the structure of the invention described in any one of claims 1 to 4, the invention described in claim 5 further includes a heat generating device provided on the two columns.

According to a fifth aspect of the present invention, in addition to the functions and effects of the first aspect of the present invention, the heat generating device has a reciprocating arc motion in synchronization with the reciprocating arc motion of the ink carriage. Do. Therefore, the heat emitted from the heat generating device can dry the ink ejected onto the recording paper conveyed in the direction of the support shaft from the direction of the ink carriage in parallel with the printing. Further, since the heat generator itself also moves, the entire recording paper can be dried even if the heat generator is made small. For this reason,
The power consumption of the heat generator and the amount of heat released from the heat generator are reduced. Therefore, an exhaust fan for discharging heat to the outside is not needed, and the inkjet printer can be downsized.

In addition to the configuration of the invention described in any one of claims 1 to 4, the invention described in claim 6 further includes a heat generation device provided at the tip of the ink carriage.

According to a sixth aspect of the present invention, in addition to the actions and effects of the first aspect, the heat generating device has a reciprocating circular arc motion in synchronization with the reciprocating circular arc motion of the ink carriage. Do. Therefore, the heat emitted from the heat generating device can dry the ink ejected onto the recording paper conveyed from the direction of the support shaft to the direction of the ink carriage in parallel with the printing. Therefore, the heat generating device can be downsized, which in turn can downsize the inkjet printer. Further, since the heat generator itself also moves, the entire recording paper can be dried even if the heat generator is made small. For this reason,
The power consumption of the heat generator and the amount of heat released from the heat generator are reduced.

According to a seventh aspect of the present invention, in addition to the configuration of the fifth aspect, the lateral width of the heat generating device is determined by the relationship between the reciprocating motion width of the heat generating device and the width of the recording paper. ing.

According to the invention described in claim 7, in addition to the action and effect of the invention described in claim 5, since the heat generating device is provided on the two columns, the radius of the reciprocating arc motion of the heat generating device is increased. Is smaller than the radius of the reciprocating arc movement of the ink carriage. Therefore, the moving width of the heat generating device during the reciprocating arc motion is smaller than that of the ink carriage. Therefore, when the ink carriage is located at the leftmost and rightmost ends of the printing area, the horizontal width of the heat generating device is set so that the hot air can be sent to the left corner and the right corner of the printing area of the recording paper. The whole can be dried.

According to an eighth aspect of the present invention, in addition to the configuration of the fifth aspect, the heat generating direction of the heat generating device is a direction extending from the center of the heat generating device.

According to the invention described in claim 8, in addition to the action and effect of the invention described in claim 5, since the heat generating device is provided on the two columns, the radius of the reciprocating arc motion of the heat generating device is increased. Is smaller than the radius of the reciprocating arc movement of the ink carriage. Therefore, the moving width of the heat generating device during the reciprocating arc motion is smaller than that of the ink carriage. Therefore, when the ink carriage is located at the leftmost end and the rightmost end of the printing area, the direction of the hot air emitted from the heat generator is set so that the hot air can be sent to the left corner and the right corner of the printing area of the recording paper. It was designed to spread from the center of the heat generator.
As a result, the entire recording sheet can be dried.

According to a ninth aspect of the present invention, in addition to the constitution of the present invention according to any of the fifth to eighth aspects,
The ink in the ink carriage is provided at a position that does not deteriorate or solidify due to the heat generated from the heat generator.

According to a ninth aspect of the invention, in addition to the function and effect of the invention according to any of the fifth to eighth aspects, the heat generated from the heat generator alters or solidifies the ink in the ink carriage. There is nothing to do.

The invention described in claim 10 is the invention according to claims 5 to 8.
In addition to the configuration of the invention described in any one of 1, the heat generating device is provided at a position where the heat generated from the heat generating device does not cause the deterioration of the ink ejected on the recording sheet and the deformation of the recording sheet. .

The invention described in claim 10 is the invention according to claims 5 to 8.
In addition to the action and effect of the invention described in any one of the above, the quality of the ink ejected onto the recording paper and the deformation of the recording paper are not caused by the heat generated from the heat generator.

The invention described in claim 11 is the invention according to claims 5 to 8.
In addition to the configuration of the invention described in any one of 1, the direction of the hot air generated from the heat generator is such that the heat does not cause deterioration or coagulation of the ink in the ink carriage, and the ink droplets ejected from the ink carriage by the wind pressure. This is the direction that does not cause flight bending.

The invention described in claim 11 is the invention according to claims 5 to 8.
In addition to the action and effect of the invention described in any one of the above, the ink generated in the ink carriage does not deteriorate or coagulate due to the heat generated from the heat generating device, and the ink drops ejected from the ink carriage due to the wind pressure. Does not cause flight bends.

The invention described in claim 12 is the invention according to claims 5 to 8.
In addition to the configuration of the invention described in any one of the above ones, a vibration absorbing member provided between the heat generating device and the two columns is further included.

The invention described in claim 12 is the invention according to claims 5-8.
In addition to the operation and effect of the invention described in any one of 1, the vibration is absorbed by the vibration absorbing member even when vibration of the heat releasing fan or the like in the heat generating device is generated, and the ink carriage There is no transmission to. Therefore, it is possible to prevent erroneous ejection of ink from the ink carriage and disturbance of printed figures and characters due to vibration generated by the heat generator.

The invention according to claim 13 is the invention according to claims 5 to 8.
In addition to the configuration of the invention described in any one of
Means for controlling the rotational movement of the two support shafts and control of ink ejection from a plurality of ink heads, and feeding the recording paper until the printing portion of the recording paper is dried, and from the heat generating device. And means for effecting heat generation of.

The invention described in claim 13 is the invention according to claims 5 to 8.
In addition to the action and effect of the invention described in any one of the above, even if an undried portion remains at the end of printing, only the heat generation device is operated to dry the ink. As a result, it is possible to eliminate stains on the printing surface due to overlapping and rubbing of the discharged recording sheets.

The invention according to claim 14 is the invention according to claims 5 to 8.
In addition to the configuration of the invention described in any one of
Means for controlling feeding of recording paper, rotational movement of two support shafts, and ink ejection from a plurality of ink heads, and means for controlling heat generation from a heat generator based on image data. Including and

The invention according to claim 14 is the invention according to claims 5 to 8.
In addition to the function and effect of the invention described in any one of the above, the heat generation device is controlled based on the image data. For this reason, the amount of heat generated from the heat generator is minimized by applying hot air only to the printed part and not to the non-printed part. You can Therefore, the power consumption of the inkjet printer can be suppressed.

[0045]

DETAILED DESCRIPTION OF THE INVENTION An inkjet printer, which is one of the embodiments of the present invention, will be described below with reference to the drawings.

[First Embodiment] Referring to FIGS. 1 and 2, an ink jet printer according to a first embodiment includes a support shaft 66, an ink carriage 63 having a plurality of ink heads 67, and one end. A pillar 65 that is pivotally attached to the support shaft 66 and has the other end fixed to the ink carriage 63.
A sheet tray 68 for storing the recording sheets 62, a recording sheet pickup roller 69 for taking out the recording sheets 62 one by one from the sheet tray 68, and the recording sheets 62 taken out by the recording sheet pickup roller 69 are sequentially conveyed. Recording sheet conveying roller 70 and recording sheet 62 for
And a control device (not shown) for controlling the paper feeding, the movement of the ink carriage 63, and the ejection of ink from the ink head 67.

The ink carriage 63 is the ink head 6
In addition to 7, an ink bottle for storing ink and the like are included.

The printing area of the ink head 67 will be described with reference to FIG. The reciprocating circular motion of the support column 65 around the support shaft 66 causes the ink carriage 63 attached to the tip of the supporting column 65 to perform a reciprocating circular motion. Images are sequentially printed on the recording paper 62 by this reciprocating arc motion. The range of motion of the ink carriage 63 during printing is set so that the ink head 67A located farthest from the support shaft 66 covers the recording paper 62. Further, the run-up portion and the overrun portion of the ink carriage 63 are provided outside the movement range of the ink carriage 63 during printing. Therefore, when the ink head 67A is located in the run-up portion and the overrun portion, the ink heads 67B to 67D located closer to the support shaft 66 than the ink head 67A do not eject ink. For example, the area on the recording paper 62 where the ink head 67D does not eject ink is the hatched area 7 in the figure.
Shown as 2. The inkjet printer is further provided with a maintenance mechanism 73 for cleaning the ink head 67 and the like, which is an extension of the overrun portion.

In the ink jet printer according to this embodiment, the scanning locus of the ink carriage 63 draws an arc. Therefore, the scanning speed differs for each ink head 67. When the ink ejection cycles from all the ink heads 67 are the same, deviations in scanning speed cause deviations between printed dots. Therefore, the control device controls by changing the ink ejection cycle for each of the ink heads 67A to 67D. Specifically, as the ink head 67D moves from the ink head 67A to the ink head 67A, the ink ejection cycle is delayed to solve the problem of the deviation between printed dots.

With reference to FIG. 4, the ink heads 67 are arranged radially from the support shaft 66. With this arrangement, the ink heads 67 can be arranged in a honeycomb shape, and the number and density of the ink heads 67 arranged in the ink carriage 63 can be increased.

In the ink jet printer described above, the ink carriage 63 makes an arc motion. Therefore, even if the running portion and the overrun portion having the same distance as the conventional one are provided along the arc, the lateral width of the running portion and the overrun portion can be made narrower than the conventional one. Therefore, the inkjet printer can be downsized.

Further, the maintenance mechanism 73 is provided on an extension of the scanning locus of the ink carriage 63 which makes an arc motion. However, the lateral movement width of the ink carriage 63 is defined by the radius of the arc movement, that is, the length from the support shaft 66 to the tip of the ink carriage 63. Therefore, even if the maintenance mechanism 73 is provided, the lateral movement width of the ink carriage 63 can be suppressed to about twice the length from the support shaft 66 to the tip of the ink carriage 63. Therefore, a small inkjet printer can be provided.

[Second Embodiment] Referring to FIGS. 5 and 6, an ink jet printer according to a second embodiment has two support shafts 66 arranged at predetermined intervals and a plurality of ink heads 67. The ink carriage 63 and one end thereof are respectively attached to the two support shafts 66, and the other end is attached to the ink carriage 63 at the above-mentioned predetermined interval.
One column 65, a paper tray 68 for storing the recording paper 62, a recording paper pickup roller 69 for taking out the recording paper 62 one by one from the paper tray 68, and a recording paper 62 taken out by the recording paper pickup roller 69. A recording paper transport roller 70 for sequentially transporting
A controller (not shown) for controlling the feeding of the recording paper 62, the movement of the ink carriage 63, and the ejection of ink from the ink head 67, and a receiver (not shown) for receiving the image data. including.

The ink carriage 63 is the ink head 6
In addition to 7, an ink bottle for storing ink and the like are included.

The two support shafts 66, the two columns 65 and the ink head 67 constitute a link mechanism, and the two columns 6
By performing the reciprocating arc motions of the carriage 5 about the two support shafts 66, the ink carriage 63 can perform the reciprocating arc motion while maintaining the same posture as shown in FIG. In addition, referring to FIG. 7, the ink carriage 63 is placed outside the movement range of the ink carriage 63 during printing.
The run-up section and the over-run section are provided.

Referring to FIG. 8A, when the image data 80 received by the receiving device is used as it is for printing on the recording paper 62 by the ink jet printer according to the present embodiment, the ink carriage 63 is scanned. Since the locus draws an arc, an image having an arc-shaped distortion as shown in the print result 82 is formed. Therefore, referring to FIG. 8B, the control device corrects image data 80, creates print image data 84, and prints on recording paper 62 based on print image data 84. As a result, a print result 86 having no distortion is formed on the recording paper 62.

A method of creating the print image data 84 will be described with reference to FIG. The image data 80 received by the receiving device is rectangular image data having a diagonal line of (X0, Y0)-(Xm, Yn). Print image data 84 corresponding to a certain coordinate (Xp, Yp) in the image data 80
The coordinates above can be represented as (Xp, Yp + R (Xp)). That is, the x coordinate does not change, but the y coordinate changes by the value R (Xp) defined by the coordinate value Xp.
(X0, Y0) on the image data 80, (X (m / 2),
A straight line passing through (Y0) and (Xm, Y0) is (X0, Yp + R (X0)), (X
It is converted into a concave arc curve passing through (m / 2), Yp + (R (X (m / 2)))) and (Xm, Yp + R (Xm)). The curvature of the concave arc curve is the same as the curvature of the convex arc curve that is the scanning locus of the ink carriage 63.

Print image data 8 thus obtained
By performing printing using No. 4, it is possible to form an arc-free image similar to the image data received on the recording paper 62 conveyed from the support shaft 66 in the direction of the ink carriage 63.

The printing operation of the ink jet printer will be described with reference to FIG. The control device clears a receiving memory (not shown) provided in the inkjet printer for receiving the image data 80 and a printing memory (not shown) for storing the print image data 84. (S1).

The receiving device uses the image data 80 for one page.
Is received and stored in the receiving memory (S2). If the received image data 80 is not bitmap data,
A process (rasterization process) of converting into bitmap data is performed.

The control unit controls the image data 80 for one page.
After being converted into the print image data 84 according to the above method,
It is stored in the print memory (S3).

The controller sets 1 to the value of the counter (not shown) (S4). The control device controls the print image data D required for one scan of the ink carriage 63.
(T) is read from the printing memory, and printing is performed based on this print image data D (t) (S5). The print image data D (t) will be described later.

The control device determines whether or not the printing for one page is completed (S6). If the printing for one page is completed (YES in S6), the printing process is ended. If the printing for one page is not completed (NO in S6), the counter is incremented by 1 (S7), and the processes from S4 onward are repeated.

Referring to FIG. 11, print image data D
(T) will be described. One-time ink carriage 63
If the number of pixels in the Y direction (conveyance direction of the recording paper 62) required for the scanning of 1 is h, the ink carriage 63
Print image data D required in the t-th scanning of
(T) is (x0, y (h ×
(T-1)))-(xm, y (h * t-1)) is data in a rectangular area having a diagonal line.

When the receiving device is connected to a scanner or a facsimile, image data is received line by line or every few lines. Therefore, in such a case, the printing operation can be performed while performing the receiving operation, so that the printing speed can be improved. Further, since it is not necessary to have a receiving memory for one page, the cost of the inkjet printer can be reduced.

A case where the printing operation is performed while the receiving operation is performed will be described with reference to FIG. The control device clears the printing memory (S11) and the receiving memory (S12). The control device determines whether the reception of the image data 80 for one page is completed (S13). If the reception of the image data 80 for one page is not completed (NO in S13), the receiving device receives the image data 80 for one line and stores it in the reception memory (S14). If the received image data 80 is not bitmap data, processing (rasterization processing) for converting it to bitmap data is performed.

The control unit controls the image data 80 for one line.
Is converted according to the above method, and the converted data is additionally stored in the printing memory (S15).

The control device determines whether or not the print image data 84 required for one scan of the ink carriage 63 is stored in the print memory (S16). If the print image data 84 required for one scan is not stored (NO in S16), the process returns to S12, and the processing from S12 is repeated until the print image data 84 required for one scan is stored.

If the print image data 84 required for one scan is stored (YES in S16), the control device reads the print image data D (1) from the print memory and stores it in the print image data D (1). Based on this, printing is performed (S17).

In preparation for the next printing, the control device controls the print image data D (t) (t ≧ t) stored in the print memory.
Print image data D sequentially until the data in 2) is exhausted
(T) is stored as print image data D (t-1) (S18). That is, the data to be printed next time is stored as the print image data D (1). Then, the process of S12 is repeated.

If the image data 80 for one page has been received (YES in S19), the control device determines whether or not the print image data D (1) remains (S1).
9). If the print image data D (1) does not remain (S
(NO in 19), the process ends. Print image data D
If (1) remains (YES in S19), the control device reads the print image data D (1) from the print memory and prints (S20). Then, the process ends.

In the ink jet printer described above, the ink carriage 63, the two columns 65, and the support shaft 66.
And form a link mechanism, the ink carriage 63
Can make a reciprocating arc motion while maintaining the same posture. Therefore, even if the running portion and the overrun portion having the same distance as the conventional one are provided along the arc, the lateral width of the running portion and the overrun portion becomes narrower than that of the conventional one. Therefore, the inkjet printer can be downsized. Further, since the ink carriage 63 moves while maintaining the same posture, the scanning speeds of the ink heads 67 are all the same. Therefore, there is no problem of misalignment between dots at the time of printing which is caused by a difference in scanning speed between the ink heads 67.

Further, the image data is stored in the ink carriage 63.
After being converted into an arc shape in advance on the basis of the curvature of the locus during the reciprocating arc movement of, the printing process is performed. Therefore, even if the ink carriage 63 moves in an arc shape, printing can be performed without arc distortion.

Further, when the image data can be obtained only every one line or every few lines, like the image data obtained from a facsimile, etc., the image data is received every one line or every few lines and the conversion process is performed. After that, print processing is performed. As a result, the capacity of the receiving memory can be reduced.

[Third Embodiment] Referring to FIGS. 13 and 14, an ink jet printer according to a third embodiment has two support shafts 66 arranged at a predetermined interval and a plurality of ink heads 67. In order to store the recording paper 62, the ink carriage 63, two struts 65, one end of which is pivotally attached to the two support shafts 66, and the other end of which is pivotally attached to the ink carriage 63 at the above-mentioned predetermined interval. Paper tray 68 and the recording paper 62 from the paper tray 68
Recording paper pickup roller 69 for picking up sheets one by one
A recording paper conveyance roller 70 for sequentially conveying the recording paper 62 picked up by the recording paper pickup roller 69, a paper feed of the recording paper 62, and an ink carriage 63.
And a receiver (not shown) for receiving image data, and a controller (not shown) for controlling the movement of the ink and the ejection of ink from the ink head 67.

The ink carriage 63 is the ink head 6
In addition to 7, an ink bottle for storing ink and the like are included.

The ink jet printer according to the present embodiment is different from the ink jet printer according to the second embodiment in the moving direction of the recording paper 62. That is, in the inkjet printer according to the second embodiment, the support shaft 66
While the recording paper 62 is moved from the ink carriage 63 toward the ink carriage 63, the paper is moved from the ink carriage 63 toward the support shaft 66 in the inkjet printer according to the present embodiment.

Referring to FIG. 15 (A), when the image data 80 received by the receiving device is used as it is for printing on the recording paper 62 by the ink jet printer according to this embodiment, the ink carriage 63 is scanned. Since the locus draws an arc, an image having an arc-shaped distortion as shown in the print result 82 is formed. Therefore, referring to FIG. 15B, the control device corrects image data 80, creates print image data 84, and prints on recording paper 62 based on print image data 84. As a result, the recording paper 62
An undistorted printed result 86 is formed on top.

A method of creating the print image data 84 will be described with reference to FIG. The image data 80 received by the receiving device is rectangular image data having a diagonal line of (X0, Y0)-(Xm, Yn). Print image data 8 corresponding to a certain coordinate (Xp, Yp) in the image data 80
The coordinates on 4 can be expressed as (Xp, Yp-R (Xp)). That is, the x coordinate does not change, but the y coordinate changes by the value R (Xp) defined by the coordinate value Xp. (X0, Y0), (X (m /
2), Y0) and (Xm, Y0), a straight line passing through (X0, Yp-R (X0)),
(X (m / 2), Yp- (R (X (m / 2)))) and (Xm, Yp-R (Xm)) are converted into a convex arc curve. The curvature of the convex arc curve is the same as the curvature of the convex arc curve that is the scanning locus of the ink carriage 63.

The print image data 8 thus obtained
By performing printing using No. 4, it is possible to form an arc-free image similar to the image data received on the recording paper 62 conveyed from the support shaft 66 in the direction of the ink carriage 63.

The printing operation of the ink jet printer is the same as the printing operation of the ink jet printer according to the second embodiment described with reference to FIGS. 10 to 12, and the method of creating the print image data 84 is different as described above. Only. Therefore, these descriptions will not be repeated. Note that FIG.
The print image data D (t) required for one scan of the ink carriage 63 required in the processing of S5 of 0 is
It becomes like FIG. That is, the Y direction (recording paper 6) required for one scan of the ink carriage 63.
2 is h, the print image data D (t) required in the t-th scan of the ink carriage 63 is (x0, y) in the print image data 84.
This is data in a rectangular area whose diagonal is (h × (t−1)) − (xm, y (h × t−1)).

In the ink jet printer described above, the ink carriage 63 can perform an arc motion while maintaining the same posture. Therefore, even if the running portion and the overrun portion having the same distance as the conventional one are provided along the arc, the lateral width of the running portion and the overrun portion becomes narrower than that of the conventional one. Therefore, the inkjet printer can be downsized. Further, since the ink carriage 63 moves while maintaining the same posture, the scanning speeds of the ink heads 67 are all the same. Therefore, there is no problem of misalignment between dots at the time of printing which is caused by a difference in scanning speed between the ink heads 67.

Further, after the image data is converted into an arc shape based on the curvature of the locus of the reciprocating arc movement of the ink carriage 63 in advance, the printing process is performed. Therefore, even if the ink carriage 63 moves in an arc shape, printing can be performed without arc distortion.

Further, when the image data can be obtained only every one line or every few lines, such as the image data obtained from a facsimile, the image data is received every one line or every few lines and the conversion processing is performed. After that, print processing is performed. As a result, the capacity of the receiving memory can be reduced.

[Fourth Embodiment] With reference to FIGS. 18 and 19, the ink jet printer according to the present embodiment has the structure of the ink jet printer according to the third embodiment described with reference to FIGS. 13 and 14. At the heat generation port 112, hot air or infrared rays are generated, and the recording paper 6
The heat generator 110 for drying the ink on
It is further provided on one of the columns 65.

Since the method of creating print image data and the printing operation of the ink jet printer are the same as those in the third embodiment, the description will not be repeated.

Referring to FIG. 20, the ink carriage 63
The ink printed on the recording paper 62 is dried by the heat generated from the heat generating port 112 of the heat generating device 110 when it is located under the heat generating device 110 as it is conveyed to the recording paper 62. . With reference to FIG. 21, the direction of the hot air is downward, as indicated by arrow 120. Further, the heat generating device 110 performs the reciprocating arc motion similarly to the ink carriage 63 to dry the ink on the recording paper 62, but the radius of the reciprocating arc motion of the heat generating device 110 is the reciprocating arc motion of the ink carriage 63. Less than radius of arc motion. Therefore, when the ink carriage 63 is located at the leftmost end and the rightmost end of the printing area, respectively, the width of the heat generating device 110 is set so that hot air can be sent to the left corner and the right corner of the printing area of the recording paper 62. It is set.

Referring to FIG. 22, recording sheet 62 moves from ink carriage 63 toward heat generator 110. Therefore, when the printing by the ink carriage 63 is completed, the ink carriage 63 and the heat generation device 11
A region 130 sandwiched by 0 and 0 is left as an undried portion. For this reason, the control device performs the reciprocating arc motion of the heat generating device 110 for a certain period even after the printing by the ink carriage 63 is completed to dry the area 130.

When the ink printed on the recording paper 62 is dried, heat such as hot air or infrared rays may be applied from the heat generating device 110 only to the portion where the ink is present. For this reason, the control device controls the operation of the heat generation device 110 such that heat is applied only to a portion having ink and heat is not applied to a portion having no ink. The control device determines the presence or absence of ink based on the print image data stored in the print memory, and when the portion printed by the ink carriage 63 reaches below the heat generating device 110, the heat generating device 11
0 is applied, heat is applied to the part, and when the part not printed by the ink carriage 63 reaches under the heat generating device 110, the operation of the heat generating device 110 is stopped and the part is not heated. Do not give. In general, heat is not generated instantly. For this reason,
The control device considers the time from the activation of the heat generation device 110 to the generation of heat for drying the ink,
Control the operation of the heat generator 110.

The mounting position of the heat generator 110 will be described with reference to FIG. The heat generator 110 is located relatively close to the ink carriage 63. Therefore, the heat generated by the heat generating device 110 itself and the hot air or infrared rays generated by the heat generating device 110 may adversely affect the ink in the ink tank or the ink head 67. Therefore, the distance between the heat generating device 110 or the heat generating port 112 and the ink tank or the ink head 67 is determined so that the ink in the ink tank or the ink head 67 does not deteriorate or solidify.

Further, the recording paper 62 is deformed by the heat generated by the heat generating device 110 itself and the extra hot air or infrared rays generated by the heat generating device 110, and the recording paper 6
It is conceivable that the ink printed on No. 2 will deteriorate.
Therefore, the distance between the heat generating device 110 or the heat generating port 112 and the recording paper 62 is such that the recording paper 62 is not deformed,
In addition, the ink printed on the recording paper 62 is determined so as not to deteriorate.

Further, depending on the direction of the hot air or infrared rays generated from the heat generator 110, the ink in the ink tank or the ink head 67 may be altered or solidified, and the flight trajectory of the ink ejected from the ink head 67 is bent. It may happen that the printed figures and printed characters are disturbed. Therefore, the direction of heat generation from the heat generation device 110 is set to the direction away from the ink carriage 63, that is, the direction in which the recording paper 62 moves.

The heat generating device 110 includes a movable part such as a fan in order to generate hot air from the heat generating port 112, and the heat generating device 110 vibrates during operation. Therefore, the ink carriage 63 and the ink head 6 are passed through the pillars 65 to which the heat generator 110 is attached.
Vibration is transmitted to 7. This may cause erroneous ejection of ink and disorder of printed characters and printed figures.
Therefore, referring to FIG. 24, a vibration absorbing member 140 for absorbing vibration of heat generating device 110 is attached between heat generating device 110 according to the present embodiment and two columns 65. ing.

In FIG. 20, the horizontal width of the heat generating device 110 is determined so that the moving range of the heat generating device 110 covers the printing surface. However, it is possible to dry the entire recording sheet 62 using the heat generator 110 having a small width as shown in FIG. 25 without using the heat generator 110 having such a large width. With reference to FIG. 25, the lateral movement width of the ink carriage 63 is set equal to the width of the printing surface of the recording paper 62. At this time, the lateral movement width of the heat generator 110 is the lateral movement width of the ink carriage 63. Narrower than. For this reason, as shown in FIG.
The direction of the hot air generated from is made radial as shown by arrow 120. As a result, the heat generation device 110 becomes the heat generation device 11
Hot air can be applied to a width wider than the lateral movement width of 0,
The entire recording paper 62 can be dried.

The ink jet printer described above has the following effects in addition to the effects of the ink jet printer according to the third embodiment. That is, the support shaft 6
A heat generator 110 is provided between the ink jet printer 6 and the ink carriage 63. The heat generator 110 performs a reciprocating arc motion in synchronization with the reciprocating arc motion of the ink carriage 63. Therefore, the heat emitted from the heat generator 110 can dry the ink ejected onto the recording paper 62 in parallel with the printing. In addition, the heat generator 110
Since it also exercises itself, the entire recording paper 62 can be dried even if the heat generator 110 is made small. Therefore, the power consumption of the heat generator 110 and the amount of heat released from the heat generator 110 are reduced. Therefore, an exhaust fan for discharging heat to the outside is not needed, and the inkjet printer can be downsized.

Further, in order to send hot air to the entire printing area of the recording paper 62, the heat generating device 11
The value of 0 was increased to make the direction of the hot air generated from the heat generator 110 radial. Also, for a certain period of time after printing is completed,
The heat generator 110 is activated. As a result, the entire ink on the printing surface can be dried by the time the recording paper 62 is ejected, and it is possible to eliminate stains on the printing surface due to overlapping and rubbing of the ejected recording paper 62.

Further, the heat generating device 110 can reduce the power consumed by the heat generating device 110 by drying only the portion where the ink is printed, compared with the case where the entire recording paper 62 is dried. . In addition, the heat generator 1
Since the amount of heat generated from 10 can be reduced,
The heat generator 110 itself can be downsized, and the space for releasing heat from the inkjet printer can be reduced. Therefore, the entire inkjet printer can be downsized.

Furthermore, by mounting the heat generator 110 at an appropriate position, the ink in the ink tank or the ink head 67 is not altered or solidified. In addition, the recording paper 62 is not deformed,
It does not change the quality of the ink printed on it.

Further, by setting the direction of the hot air or infrared rays generated from the heat generator 110 away from the ink carriage 63, the ink in the ink tank or the ink head 67 is not altered or solidified, and the ink head 67 is prevented. Distortion of printed figures and characters due to bending of the trajectory of the ink ejected from the printer will not occur.

Further, by providing the vibration absorbing member 140 between the heat generating device 110 and the column 65, it is possible to prevent the vibration of the ink carriage 63, and prevent erroneous ejection of ink and disorder of printed characters and printed figures.

[Fifth Embodiment] Referring to FIGS. 27 and 28, the ink jet printer according to the present embodiment is the same as the ink jet printer according to the second embodiment described with reference to FIGS. 5 and 6. In the above, a heat generating device 110 for generating hot air or infrared rays from the heat generating port 112 and drying the ink on the recording paper 62 is further provided at the tip of the ink carriage 63.

The method of creating print image data and the printing operation of the ink jet printer are the same as those in the second embodiment, and therefore the description will not be repeated.

As shown in FIG. 27, the ink carriage 6
The width of the heat generating device 110 is set so that the heat generating device 110 can eject hot air, infrared rays, or the like into the printing range when the printing is performed in the printing range of the recording paper 62.

Referring to FIG. 29, recording paper 62 moves from ink carriage 63 toward heat generator 110. Therefore, when the printing by the ink carriage 63 is completed, the ink carriage 63 and the heat generation device 11
A region 132 sandwiched by 0 and 0 is left as an undried portion. Therefore, the control device performs the reciprocating arc motion of the heat generating device 110 for a certain period even after the printing by the ink carriage 63 is completed, and the area 132 is dried.

Like the control device according to the fourth embodiment, the control device according to the present embodiment applies heat such as hot air or infrared rays only to a portion of the recording paper 62 where ink is present.
The heat generator 110 is controlled.

The mounting position of the heat generator 110 will be described with reference to FIG. Similar to the mounting position of the heat generating device 110 described with reference to FIG. 23, the distance between the heat generating device 110 and the ink carriage 63 is set so that the ink in the ink tank or the ink head 67 does not deteriorate and solidify. Determined. In addition, the recording paper 62 does not deform,
In addition, the distance between the heat generator 110 and the recording paper 62 is determined so that the ink printed on the recording paper 62 does not deteriorate. Further, the heat generation direction from the heat generation device 110 is set so that the ink in the ink tank or the ink head 67 is not deteriorated or solidified and the flight trajectory of the ink ejected from the ink head 67 is not bent. It is set in the direction away from, that is, the direction in which the recording paper 62 moves.

Further, in order to prevent erroneous ejection of ink from the ink head 67 due to vibration of a movable part such as a fan included in the heat generating device 110 and disturbance of printed characters and print patterns, the ink carriage 63 and the heat generating device 110 are prevented.
And are connected by a vibration absorbing member 140.

The inkjet printer described above can achieve the same effects as the inkjet printer according to the fourth embodiment.

[Sixth Embodiment] Referring to FIGS. 31 and 32, the ink jet printer according to the present embodiment has a support shaft 66, two parallel guide rails 150 and 152, and a plurality of ink heads. An opening 15 having a guide rail 67, capable of traveling along two guide rails 150 and 152, and having a longitudinal direction in a direction orthogonal to the traveling direction.
6, the ink carriage 154 having one end, the one end of which is pivotally attached to the support shaft 66, and the other end of which is movably fitted through the opening 156, and the sled 158 and the recording sheet 6
2, a paper tray 68 for storing 2, a recording paper pickup roller 69 for taking out the recording papers 62 from the paper tray 68 one by one, and a recording paper pickup roller 69.
A recording paper transport roller 70 for sequentially transporting the recording paper 62 taken out by the controller, and a control device for controlling the paper feed of the recording paper 62, the movement of the ink carriage 63, and the ejection of ink from the ink head 67 (see FIG. (Not shown)
And a receiving device (not shown) for receiving image data
Including and The portions of the two guide rails 150 and 152 that are joined to the ink carriage 154 are ball bearings, and the portions of the mallet 158 that are joined to the ink carriage 154 are ball bearings. FIG. 33 shows
A palm tree 158 and an ink carriage 15 shown in FIG.
4 is a sectional view taken along line YY 'of FIG. FIG. 34 is a view of the armor tree 158 viewed from the direction X1 in FIG. FIG. 35 is a view of the armpit tree 158 viewed from the direction X2 in FIG. 34. Figure 3
6 is a view of the ink carriage 154 viewed from the direction X3 in FIG. FIG. 37 is a diagram of the ink carriage 154 viewed from the X4 direction in FIG.

The armor tree 158 and the opening 156 of the ink carriage 154 are fitted together by a fitting member 162. The ink carriage 154 includes, in addition to the ink head 67, an ink bottle or the like for storing ink.

In the ink jet printers shown in the first to fifth embodiments, printing is performed while making an arc motion in order to narrow the lateral width of the run-up portion and the overrun portion. But,
Since it moves in an arc, normal image data cannot be used as it is for printing. Therefore, the second embodiment
Special image processing as shown in is required. The inkjet printer according to the present embodiment is capable of performing printing by using normal image data as it is, while changing the arc motion into the linear motion to narrow the lateral width of the run-up portion and the overrun portion. Is.

As described above, the ink carriage 154
Moves along the guide rails 150 and 152. The arc motion of the armor tree 158 is decomposed into a vertical motion of the fitting member 162 and a horizontal motion of the ink carriage 154.

The printing operation of the ink jet printer will be described with reference to FIG. The control device receives a print request from a computer or the like connected to the inkjet printer (S31). After receiving the print request, the receiving device receives the image information from the computer or the like (S32). The control device determines the image size from the received data (S33). The control device determines the amplitude of the armpit tree 158 according to the image size (S34). The control device conveys the recording paper 62 from the paper tray 68 (S
35). The control device selects data for each line from the image information and prepares data to be printed by the ink head 67 (S36). The receiving device determines whether the recording paper 62 has reached the printing unit (S37). If the recording paper 62 has not reached the printing unit (NO in S37),
The processing from S35 onward is repeated.

If the recording paper 62 has reached the printing portion (YES in S37), the controller causes the flap 158 to make a reciprocating arc motion, and prints one line on the recording paper 62 based on the prepared data. Perform (S38). The control device determines whether there is data to be printed next (S39), and if there is data to be printed next (YES in S39), S36.
The subsequent processing is repeated. If there is no data to be printed next (NO in S39), the control device determines whether or not to print the next page (S40), and if the next page is to be printed (YES in S40). , S32 and subsequent steps are repeated. When not printing the next page (N in S40
O), the process ends.

Another embodiment of the printing operation of the ink jet printer will be described with reference to FIG. S31
Since the processes of to S32 and S35 are similar to those of FIG. 38, the description will not be repeated. After the processing of S35, the control device detects the paper width of the recording paper 62 being conveyed by a detection sensor (not shown) (S41). The control device determines the amplitude of the tree 158 according to the detected paper width (S4).
2). Then, the processing of S36 to S40 is performed. S36
Since the processes of to S40 are similar to those of FIG. 38, the description will not be repeated.

Still another embodiment of the printing operation of the ink jet printer will be described with reference to FIG.
Since the processes of S31 to S32 are similar to those of FIG. 38, the description will not be repeated. After the processing of S32, the control device determines whether the paper is fed from the paper tray 68 (S5).
1). When paper is fed from the paper tray 68 (S
(YES in 51), the control device controls the recording paper 62 based on information from a positioning member (not shown) for measuring the size of the recording paper 62 stocked in the paper tray 68.
Determine the size of. When the paper is not fed from the paper tray 68 (NO in S51), the controller determines whether the paper is manually fed (S52). If the paper is manually fed (YES in S52),
Based on the information on the fixing position from the manual paper feeding paper positioning member 174 for fixing the recording paper 62 provided on the paper feed tray 172 as shown in FIG.
The size of is determined (S54). Paper feed is paper tray 68
If it is not performed from the sheet feed tray 172 (S
(NO in 52), the control device repeats the process of S51.

When the paper size of the recording paper 62 is determined by the processing of S53 or S54, the controller conveys the recording paper 62 from the paper tray 68 or the paper feed tray 172 (S55). The control device determines the amplitude of the tree 158 according to the paper size (S56). Then S
The processing of 36 to S40 is performed. Since the processing of S36 to S40 is similar to that of FIG. 38, the description will not be repeated.

As described above, the ink carriage 1
The reference numeral 54 moves along the two guide rails 150 and 152, and performs printing while performing linear movement. The scanning of the ink carriage 154 is performed by the reciprocating circular arc movement of the arm 158. The reciprocating circular arc motion of the armpit tree 158 is caused by the linear motion in the vertical direction in which the armpit tree 158 moves through the opening 156 of the ink carriage 154 and the ink carriage 154.
Is decomposed into a lateral linear motion traveling along the guide rails 150 and 152. Therefore, even if the running portion and the overrun portion having the same distance as the conventional one are provided along the circumference, the lateral width of the running portion and the overrun portion becomes smaller than that of the conventional one. Therefore, the ink carriage 15
It is possible to reduce the width of lateral movement of No. 4 and to reduce the size of the inkjet printer.

In addition, two guide rails 150 and 1
The portion of 52 that is joined to the ink carriage 154 is a ball bearing, and the portion of the arm 158 that is joined to the ink carriage 154 is a ball bearing. Therefore, the ink carriage 154 can be moved smoothly.

Further, since the control device determines the amplitude of the tree 158 according to the image size, high speed printing can be performed without the ink carriage 154 making unnecessary reciprocating motion.

Furthermore, the movement control of the ink carriage 154 is performed based on the size of the recording paper 62.
Therefore, the operating range of the ink carriage 154 can be limited to the inside of the recording paper 62 at the time of printing, and unnecessary movement of the ink carriage 154 is eliminated. Therefore, printing can be performed at high speed.

The embodiments disclosed this time are to be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description but by the claims, and is intended to include meanings equivalent to the claims and all modifications within the scope.

[Brief description of drawings]

FIG. 1 is an internal top view of an inkjet printer according to a first embodiment.

FIG. 2 is an internal side view of the inkjet printer according to the first embodiment.

FIG. 3 is a diagram illustrating a print area of an ink head 67.

FIG. 4 is a diagram illustrating an arrangement of ink heads 67.

FIG. 5 is an internal top view of the inkjet printer according to the second embodiment.

FIG. 6 is an internal side view of the inkjet printer according to the second embodiment.

FIG. 7 is a diagram illustrating an approach portion and an overrun portion of the ink carriage 63.

FIG. 8 is a diagram illustrating conversion of image data.

FIG. 9 is a diagram illustrating a method of creating print image data.

FIG. 10 is a flowchart of a printing operation of the inkjet printer.

FIG. 11 is a diagram illustrating print image data.

FIG. 12 is a flowchart of a printing operation while performing a receiving operation of the inkjet printer.

FIG. 13 is an internal top view of the inkjet printer according to the third embodiment.

FIG. 14 is an internal side view of the inkjet printer according to the third embodiment.

FIG. 15 is a diagram illustrating conversion of image data.

FIG. 16 is a diagram illustrating a method of creating print image data.

FIG. 17 is a diagram illustrating print image data.

FIG. 18 is an internal top view of the inkjet printer according to the fourth embodiment.

FIG. 19 is an internal side view of the inkjet printer according to the fourth embodiment.

FIG. 20 is a diagram for explaining the size of the heat generation device.

FIG. 21 is a diagram illustrating the direction of hot air generated by the heat generator.

FIG. 22 is a diagram for explaining an ink undried portion after printing is completed.

FIG. 23 is a diagram for explaining a mounting position of a heat generating device.

FIG. 24 is a cross-sectional view taken along the line AA of the heat generation device of FIG. 23.

FIG. 25 is a diagram for explaining the size of the heat generation device.

FIG. 26 is a diagram illustrating the direction of hot air generated by the heat generator.

FIG. 27 is an internal top view of the inkjet printer according to the fifth embodiment.

FIG. 28 is an internal side view of the inkjet printer according to the fifth embodiment.

FIG. 29 is a diagram for explaining an ink undried portion at the end of printing.

FIG. 30 is a diagram for explaining a mounting position of a heat generating device.

FIG. 31 is an internal top view of the inkjet printer according to the sixth embodiment.

FIG. 32 is an internal side view of the inkjet printer according to the sixth embodiment.

FIG. 33 is a cross-sectional view of an arm and an ink carriage.

FIG. 34 is a view of the armor tree viewed from the X1 direction in FIG. 33.

FIG. 35 is a view of the armor tree viewed from the direction X2 in FIG. 34.

FIG. 36 is a diagram of the ink carriage seen from the direction X3 in FIG. 33.

37 is a diagram of the ink carriage 154 viewed from a direction X4 in FIG. 36.

FIG. 38 is a flowchart of a printing operation of the inkjet printer.

FIG. 39 is a flowchart of the printing operation of the inkjet printer.

FIG. 40 is a flowchart of a printing operation of the inkjet printer.

FIG. 41 is a diagram illustrating a sheet positioning member for manual sheet feeding.

FIG. 42 is a diagram illustrating a run-up portion, a print area, and an overrun portion of a conventional inkjet printer.

FIG. 43 is an internal side view of a conventional inkjet printer.

[Explanation of symbols]

63 ink carriage 65 props 66 spindle 67 ink head

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuyoshi Miyao 22-22 Nagaike-cho, Abeno-ku, Osaka-shi, Osaka Sharp Corporation (72) Inventor Toshihiro Asaka 22-22 Nagaike-cho, Abeno-ku, Osaka-shi, Osaka Sharp Within the corporation (56) Reference JP-A-5-77516 (JP, A) JP-A-61-279571 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B41J 19/00 -19/74 B41J 2/01

Claims (14)

(57) [Claims] 1. A pair of support shafts rotatably provided around two predetermined shafts arranged at a predetermined interval, and a circular arc motion around the two shafts as the two support shafts rotate. 2 fixed to each of the two spindles
An ink carriage having one support and a plurality of ink heads provided at predetermined positions from the support shafts of the two support, a paper feed of recording paper, a rotational movement of the two support shafts, and the plurality of support shafts. An ink jet printer including a control unit for controlling the ejection of ink from an ink head. 2. The control means converts image data based on a curvature of a locus during reciprocating arc movement of the ink carriage, and based on the converted image data, paper feed of the recording paper and the two supports. The inkjet printer of claim 1, including means for controlling rotational movement of the shaft and control of ink ejection from the plurality of ink heads. 3. The control means prepares image data for one page, and the image data for one page prepared on the basis of the curvature of a locus during reciprocating arc movement of the ink carriage. 2. The method according to claim 1, further comprising: means for controlling the paper feed of the recording paper, the rotational movement of the two support shafts, and the ejection of ink from the plurality of ink heads based on the converted image data. The described inkjet printer. 4. The control means is prepared based on a means for sequentially preparing a predetermined number of lines of data obtained by dividing one page of image data, and on the basis of a curvature of a locus during a reciprocating arc movement of the ink carriage. The predetermined number of lines of data are converted, and the recording paper is fed based on the converted data.
The inkjet printer according to claim 1, further comprising means for controlling rotational movement of one support shaft and control of ink ejection from the plurality of ink heads. 5. The inkjet printer according to claim 1, further comprising a heat generating device provided on the two columns. 6. The ink jet printer according to claim 1, further comprising a heat generating device provided at a front end of the ink carriage. 7. The inkjet printer according to claim 5, wherein the lateral width of the heat generating device is determined by the relationship between the reciprocating motion width of the heat generating device and the width of the recording sheet. 8. The ink jet printer according to claim 5, wherein the heat generation direction of the heat generation device is a direction extending from the center of the heat generation device. 9. The heat generating device is provided at a position where the ink in the ink carriage is not deteriorated or solidified by the heat generated from the heat generating device.
The ink jet printer according to any one of to 8. 10. The heat generating device is provided at a position where the heat generated from the heat generating device does not cause deterioration of the ink ejected onto the recording sheet and deformation of the recording sheet. The ink jet printer according to any one of to 8. 11. The direction of hot air generated from the heat generator does not cause deterioration or coagulation of ink in the ink carriage due to heat, and causes flight bending of ink droplets ejected from the ink carriage due to wind pressure. The inkjet printer according to any one of claims 5 to 8, which is in a non-direction. 12. The vibration absorbing member provided between the heat generating device and the two columns is further included.
8. The inkjet printer according to any one of 8. 13. The means for controlling the rotational movement of the two support shafts and the ejection of ink from the plurality of ink heads, and the control device until the drying of a printed portion of the recording paper is completed. The inkjet printer according to any one of claims 5 to 8, further comprising means for feeding the recording paper and generating heat from the heat generator. 14. The control device controls the paper feed of the recording paper, the rotational movement of the two support shafts, and the ejection of ink from the plurality of ink heads, and based on image data, An ink jet printer according to any one of claims 5 to 8, including means for controlling heat generation from a heat generation device.