Ink jet printer

[Detailed Description of the Invention]

[Industrial Application] An ink-jet printer is started, it has a carriage which carries the ink jet head which has a discharge mouth which carries out discharge of the ink in more detail, and un-inventing is .. It is related with the ink-jet printer which improved the capping mechanism which caps the discharge mouth of ink.

[Description of the Prior Art] ink-jet printers are discharge and a thing which makes it fly and performs A pot record about the drop of ink -- 1 -- it has the advantage of following many. l) Since it is a nonimpact type, noise does not occur at the time of record. 2) Regular paper record is possible. 3) High-speed printing is comparatively possible. 4) Colorization is easy. 5) It is freely recordable even if the other party is a curved surface etc. - As mentioned above, there is a big weak point also in an ink-jet printer with many advantages, and the greatest thing is an ink non-discharge phenomenon. Since this uses fluids, such as ink, as a recording device, it arises inevitably and a clog of the ink which carries out discharge of the drop of ink produces it as a center. As a cause of these 11 jams, various causes, such as that ink dries, for example, that garbage adheres, and inhaling air from a nozzle, can be considered. Then, in the usual ink-jet printer, the capping mechanism which caps the discharge mouth of ink is provided in the position of the home position, and it is going to cancel the non-discharge phenomenon which arises according to various kinds of causes by operating this capping mechanism. The rolled paper containing the fan hold paper folded up especially in these days or a sewing machine mouth is used as a recording form in many cases, In such a case, the paper powder generated when cutting a recording form from sewing machine 11 adheres to a nozzle, the direction in which the drop of ink carries out discharge may change, or discharge non-ability may arise. When carrying out the paper feed (fast forward) of the fan hold paper etc. especially, the portion of perforations surely turns into FS 8 minutes of a mountain, and the portion of this mountain approaches a nozzle side, or it contacts, and paper powder carries out Inquiry arrival to discharge]" of a nozzle in many cases. Then, when the paper feed of the fan hold paper etc. was carried out, the ink jet head was returned to the home position, and operation of keeping the portion of the mountain of perforations from approaching a nozzle was performed.

If time adopts structure which was mentioned above with [Problem(s) to be Solved by the Invention], In order to move to the position where operation not only becomes very troublesome, but an ink jet head does not counter a recording form for whenever [ of the paper feed of rolled paper with fan hold paper or perforations / every ], i.e., a home position, there was a fault that a time loss was very large. It is although the capping mechanism operates, it will stick it as the cap covers a nozzle portion and operation which prevents dryness of ink etc. will be performed, if a carriage returns to a home position in the case of a paper feed (fast forward), There was a fault of a mechanism complicated as a mechanism to which the cap by the side of a capping mechanism is moved having been required at this time, and there having also been many 1 part mark, and becoming a cost overrun.

[Means for Solving the Problem] An axial center guide shaft [ to which it shows slidably a carriage which carries an ink jet head ] in order to solve a problem mentioned above in the present invention thing for which eccentricity is carried out and this guide shaft is rotated, A carriage was separated from a platen and structure where capping operation could also be made to perform was adopted.

[Function] If structure which was mentioned above is adopted, only by rotating a guide shaft, even if a carriage is in which position, carry 2 Di can be carried out between approach and m to a platen, and even if it does not return a carriage to a home position like before, a paper feed (fast forward) can be performed.

[Example] hereinafter, based on the example shown in a drawing, the present invention is detailed -- it takes opinion IJ1. Below the 1st figure illustrates one example of the present invention, and the whole important section is shown in Drawing 1. It is an ink jet head which is shown with numerals l in Drawing 1, and it comprises four heads which carry out discharge of the ink of each color of the left in the figure, a love rack, Hierro, magenta, and cyanogen in this example, and can perform record of a total of 7 colors combining the ink of these colors. Record instructions are sent via flexible cable 4. Ink jet head 1 is carried in carriage 3, and ink is supplied from subink tank 2 similarly carried in the carriage. Supply of the ink to subink tank 2 is performed via flexible tube 5 from the main tank which is not illustrated. Carriage 3 is slidably attached to two guide shafts 6a and 6b. As shown in Drawing 3, eccentricity of the axial center 6C of these guide shafts 6a and 6b is carried out, and it is arranged so that it may become the same phase. And respectively same \ Ya 7a and 7b are being fixed to these axial centers 6C, these gears 7a and 7b mesh via a drive gear [ of motor 8 ] 8a, direct, or middle gear, and gears 7a and 7b rotate in the same direction. Although carriage 3 is being fixed in the middle of timing belt 13 of 2 * Sunless and it is moved by making it run timing belt 13, capping mechanism 9 is arranged at the home position. Cap lO which seals each nozzle portion of an ink jet head is provided in capping mechanism 9. It is a platen which is shown by A mark 3tt, and 12 is paper control. 1 [ next, ] -- operation of this example constituted as mentioned above is explained. First, the state where carriage 3 is in a home position is shown in Drawing 2 (A) and Drawing 3 (A). Since motor 8 rotates clockwise among the 1st figure in this state, gears 7a and 7b rotate counterclockwise and the peripheral surface of guide shaft 6 a of the furthest side (major-axis side) from axial center 6C and 6 b is in the platen 11 side, A carriage is moved to the capping mechanism 9 side as a whole, and the nozzle portion of the head is sealed with cap 10. On the other hand, the state at the time of record is shown in Drawing 2 (B) and Drawing 3 (B) and (C). At this time, motor 8 is rotated to the counterclockwise rotation in the 1st figure, gears 7a and 7b are rotated to a clockwise rotation, and guide shafts 6a and 6b are made for the major-axis side to be located perpendicularly. At this time, carriage 3 moves up, as shown in Drawing 3 (B), and it separates from capping mechanism 9 and platen 11 for a prescribed distance, and record is performed in this state. Motor 8 is rotated further counterclockwise, and guide shafts 6a and 6b are clockwise rotated to perform a paper feed (fast forward) in the middle of record so that the major-axis side may turn to a counter direction with a platen. Then, as shown in Drawing 2 (C) and Drawing 3 (D), carriage 3 descends as a whole, and it separates from a platen. Therefore, can perform fast forward and cutting of a recording form freely between Rad l to platen 11 and an ink-jet, and paper powder etc. stop reaching even a nozzle portion to them, and a clog of a nozzle does not arise. Drawing 2 (D) and (E) returns to a home position, the operation which caps is explained, and operation contrary to having mentioned above is performed. Since this example is constituted as mentioned above, it does not need to approach, cannot be made to estrange to a platen in the arbitrary positions of a carriage only by rotating a guide shaft, does not need to return a carriage to a home position at the time of fast forward, and can accelerate recording operation. Capping operation can also be performed by the rotating operation of a guide shaft, a capping mechanism like before becomes unnecessary, and it can realize a cost cut. The thing of form which makes ink breathe out from the head side may be sufficient also as the thing of the form which carries out negative pressure suction of the ink from a nozzle as capping mechanism 9.

[Effect] According to the 1 present invention, approach, estrangement, and capping operation of as opposed to a platen only at rotation - of a guide shaft of a carriage can be made to perform, the record time can be sharply shortened also as the whole, a mechanism is simplified, and a cost cut can be realized so that clearly from the above explanation.

[Brief Description of the Drawings]

It is a side view a figure illustrates one example of the present invention, Drawing 1 illustrates the top view ~ (E) explains operation of a carriage to be, and the perspective view of an important section and 2nd [ The ] figure (A) figure (A) (D) 3 ~ explain operation of a carriage to be. l ... Ink-jet nozzle 3 ... Carriage 6a, 6b [ 8 / ... Platen carry, upsilon Blood chart / Ill / which carries out Investigation / 3 figure of Tsu of operation / ... Motor 9 ... Capping mechanism 11 ] ... Guide shafts 7a and 7b ... Gear