JP6217176B2 - Printing device - Google Patents

Description

  The present invention relates to a printing apparatus capable of collecting ink mist floating in a casing.

  In a printing apparatus equipped with an ink jet head, a portion of ink droplets ejected from the ink jet head may become ink mist and float in the housing before reaching the recording paper. The floating ink mist adheres to the components in the housing and contaminates them. Ink mist is charged due to the charging of the ink nozzle surface of the inkjet head and the charging of the platen, so it adheres to the charged components in the housing such as the electronic substrate and sensor, causing problems in these. Sometimes.

  Patent Document 1 describes a technique for collecting ink mist. In this document, when ink droplets are ejected from an ink jet head, a voltage is applied to a conductive plate provided on the ink jet head to positively charge the ink droplet, and the mist absorbing material is defined as an ink droplet by applying a voltage. Ink mist is collected by being charged to the opposite polarity.

JP 2012-228804 A

  In the technique of Patent Document 1, a configuration for controlling charging of ink droplets and a configuration for charging a mist absorbing material must be mounted on the printing apparatus, which complicates the structure of the printing apparatus. In addition, since a voltage must be applied to the conductive plate and the mist absorbing material, there is a problem that power consumption is involved in collecting the ink mist.

  In view of such problems, an object of the present invention is to provide a printing apparatus that can collect ink mist with a simple configuration without power consumption.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 An inkjet head that discharges ink onto a print medium and a charging member are provided, and the charging member is disposed at a position where one surface of the charging member can face the inkjet head. A printing device.

  The inventors of the present invention have obtained new knowledge that the charging member used for capturing and removing small dust in the atmosphere is excellent in collecting ink mist through experiments and the like. The printing apparatus of the present invention is based on such knowledge. According to this configuration, the ink mist generated when the ink droplets are ejected from the inkjet head can be collected by the charging member. Therefore, it is possible to suppress or prevent the ink mist from contaminating the housing. In addition, it is possible to prevent or suppress the ink mist from adhering to the charged parts in the housing such as the electronic substrate and the sensor, and causing problems in them.

  (Application Example 2) A head moving mechanism that moves the inkjet head along a predetermined movement path, wherein the charging member has the one surface exposed to the movement path. Printing device.

  In the configuration in which the inkjet head moves, the ink mist tends to float due to the airflow generated due to the movement of the inkjet head. Therefore, if one surface of the charging member is exposed to the movement path, ink mist floating in the movement path can be easily collected.

  (Application example 3) A medium conveyance path extending via a printing position on the print medium by the inkjet head, and the head moving mechanism includes a carriage on which the inkjet head is mounted, and the print medium in the medium conveyance path. A carriage guide shaft extending in a width direction perpendicular to the transport direction; and a carriage moving mechanism for moving the carriage along the carriage guide shaft. The charging member is disposed to face the carriage guide shaft. A printing apparatus as described above.

  Static electricity is likely to occur between the carriage guide shaft and the carriage due to these sliding movements. Accordingly, the carriage guide shaft is easily charged, and the charged ink mist is attracted from the inkjet head to the vicinity of the carriage guide shaft. If the charging member is arranged so as to face the inkjet head and the carriage guide shaft as in this configuration, ink mist can be easily collected. Further, by arranging the charging member as close as possible to the carriage guide shaft, the effect of collecting ink mist is further improved.

  (Application Example 4) The above-described printing apparatus having a frame extending along the movement path, wherein the charging member is attached to the frame.

  According to this configuration, one surface of the charging member can be exposed to the moving path in a wide range along the moving path.

  Application Example 5 It has a pair of side frames disposed forward and backward in the moving direction of the inkjet head with the moving path in between, and the charging member is at least one of the pair of side frames. It is attached to the above-mentioned printing apparatus.

  According to this configuration, the charging member can collect the ink mist that moves forward in the movement direction due to the positive pressure accompanying the movement of the inkjet head and the ink mist that rises behind in the movement direction due to the negative pressure accompanying the movement of the inkjet head. .

  (Application example 6) The inkjet head and the head moving mechanism are accommodated, and an exterior case is formed in which the movement path is formed. The exterior case opens and closes at least a part of the movement path. The printing apparatus according to claim 1, further comprising a lid, wherein the charging member is attached to an inner surface of the opening / closing lid.

  Such an opening / closing lid is provided for maintenance inside the outer case, and is provided adjacent to the movement path. Therefore, if the charging member is attached to the opening / closing lid, the ink mist that rises due to the airflow generated as the inkjet head moves can be collected by the charging member.

  (Application Example 7) A medium conveyance path extending through a printing position by the inkjet head is provided, and the head moving mechanism is arranged at a first outer position and a second side that are deviated to one side in the width direction of the medium conveyance path. The inkjet head is reciprocated between the second outer position and the second outer position, and a head maintenance mechanism for maintaining the inkjet head is disposed at the first outer position. The printing apparatus according to claim 1, further comprising a lower frame that can face an ink nozzle surface of the inkjet head, and the charging member is attached to the lower frame.

  According to this configuration, the second outer position is the edge of the recording paper in the paper width direction when printing on the recording paper conveyed through the medium side conveyance path while moving the inkjet head in the width direction of the medium conveyance path. It becomes a space for retracting the ink jet head when printing a portion, and such a space tends to be an air flow path. That is, the ink mist moves to various places in the housing through the space provided at the second outer position. Therefore, if the charging member is attached to the lower frame arranged in the space, the movement of the ink mist to various places in the casing can be prevented or suppressed.

  (Application Example 8) An inkjet head that ejects ink onto a print medium, a carriage on which the inkjet head is mounted, and a charging member that is attached to one or both of the inkjet head and the carriage. Printing device.

  According to this configuration, ink mist generated when ink droplets are ejected from the inkjet head can be collected by the charging member disposed on the side surface of the carriage or the inkjet head. Therefore, it is possible to suppress or prevent the ink mist from contaminating the housing. In addition, it is possible to prevent or suppress the ink mist from adhering to the charged parts in the housing such as the electronic substrate and the sensor, and causing problems in them.

  (Application example 9) A carriage movement mechanism that reciprocates the carriage in a scanning direction orthogonal to the conveyance direction of the print medium, and the charging member changes a traveling direction when the carriage moves to one end side of a scanning section. It is affixed to one or both of the side of the carriage or the inkjet head that faces and the side of the carriage or the inkjet head that faces the traveling direction when moving to the other end of the scanning section. The printing apparatus as described above.

  According to this configuration, when ink is ejected by scanning the carriage and the ink jet head, ink droplets are attracted by a negative pressure or the like in the vicinity of the side surface facing the traveling direction during scanning. Therefore, by disposing the charging member on the side surface facing the traveling direction at the time of scanning, the ink mist can be effectively collected and the ink mist can be prevented from floating.

  Application Example 10 One end of the scanning section of the carriage is a standby position where the inkjet head is retracted from the print medium, and the charging member is moved from the standby position to the other end side of the scanning section. The printing apparatus as described above, wherein the printing apparatus is attached to a side surface of the carriage or the ink jet head that faces a traveling direction when moving.

  In this printing apparatus, at the time of printing standby, the inkjet head is moved to a standby position to stand by, and a flushing operation is performed to keep the ink nozzles in a normal state at the standby position. According to this configuration, the ink mist generated during the flushing operation can be collected by arranging the charging member on the surface facing the other end of the scanning section.

  (Application Example 11) The printing apparatus, wherein the charging member is detachably attached.

  According to this configuration, it becomes easy to replace a charging member that has been contaminated by collecting ink mist with a new charging member.

  (Application Example 12) The above-described printing apparatus, wherein the charging member is a charging filter made of a porous electret body.

  According to this configuration, a charging filter made of a porous electret body can be used as the charging member. The electrification filter is composed of an electret body and a porous structure such as a nonwoven fabric made of a thermoplastic resin such as polypropylene. An electret body is a dielectric that maintains permanent polarization.

  According to the present invention, by using a charging filter as a charging member, ink mist can be collected with a simple configuration without power consumption.

1 is an external perspective view of an ink jet printer to which the present invention is applied. FIG. 2 is a schematic longitudinal sectional view showing an internal configuration of the printer. The perspective view which looked at the printer which removed the exterior case from the printer front. The perspective view which looked at the printer which removed the exterior case from the printer back. The perspective view which shows the state which opened the opening-and-closing lid | cover of the printer which concerns on 2nd Embodiment. The perspective view at the time of seeing the print head of the printer which concerns on 3rd Embodiment, a head moving mechanism, and an ink flow path from the diagonally downward front. The figure explaining the 1st modification of 3rd Embodiment.

(First embodiment)
Hereinafter, a first embodiment will be described with reference to the drawings. In the drawings referred to in the following description, the vertical and horizontal scales of members or parts may be shown differently from the actual ones for convenience of description and illustration.

(About overall printer configuration)
First, an overall configuration of an ink jet printer (hereinafter referred to as a printer) as a printing apparatus to which the present invention is applied will be described with reference to FIG. FIG. 1 is an external perspective view of an ink jet printer to which the present invention is applied. Note that the X direction shown in FIG. 1 indicates the width direction of the printing paper as the printing medium, the Y direction indicates the discharge direction of the printing paper, and the Z direction indicates a direction orthogonal to the X direction and the Y direction.

  As shown in FIG. 1, the printer 1 includes a printer main body 2 and a reversing unit 3. The printer main body 2 has a rectangular parallelepiped shape that is long in the printer width direction X as a whole. A concave portion 4 is formed in the central portion of the back surface of the printer main body 2, and the reversing unit 3 is attached thereto. The reversing unit 3 is a unit for returning the printing paper P to the printer main body 2 with the front and back sides of the printing paper P (see FIG. 2), which is a sheet-like medium, reversed.

  The printer main body 2 is provided with a paper feed cassette mounting portion 5. The paper feed cassette mounting unit 5 is open to the front of the printer (front of the printer front-rear direction Y) in the lower part of the printer vertical direction Z on the front surface of the printer main body unit 2. A paper feed cassette 6 is detachably attached to the paper feed cassette mounting portion 5 from the front of the printer. A paper discharge tray 7 is attached to the upper side of the paper cassette mounting unit 5. The front end portion of the paper discharge tray 7 protrudes from the printer main body 2 toward the front of the printer. A rectangular paper discharge port 8 is formed on the upper side of the paper discharge tray 7 so as to extend rearward of the printer (backward in the front-rear direction Y of the printer).

  The exterior case 9 of the printer main body 2 includes an operation surface 9 a on the front surface portion on the upper side of the paper discharge port 8. A power switch, a status display lamp, and the like are arranged on the operation surface 9a. In the exterior case 9, rectangular open / close doors 9 b and 9 c are attached to the front surface of the printer on both sides of the paper discharge tray 7 and the paper discharge outlet 8. When these open / close doors 9b and 9c are opened, the ink cartridge mounting portion 10 (see FIG. 3) is opened, and the ink cartridge (not shown) can be replaced. The upper surface portion of the printer in the outer case 9 is a substantially flat surface, and a maintenance opening / closing lid 11 is attached to the central portion thereof.

(About the internal configuration of the printer)
The internal configuration of the printer 1 will be described with reference to FIG. FIG. 2 is a schematic longitudinal sectional view showing the internal configuration of the printer. The X direction, Y direction, and Z direction shown in FIG. 2 indicate the same directions as the X direction, Y direction, and Z direction shown in FIG.

  As shown in FIG. 2, a printing paper supply path 12, a main body side conveyance path (medium conveyance path) 13, and a reverse conveyance path 14 are formed inside the printer 1. The printing paper supply path 12 and the main body side conveyance path 13 are formed inside the exterior case 9 of the printer main body 2, and the reversal conveyance path 14 is formed inside the reversing unit 3.

  The printing paper supply path 12 is a conveyance path for supplying printing paper P having a predetermined size stored in the paper cassette 6 in a stacked state to the main body conveyance path 13. The printing paper supply path 12 and the paper feed cassette 6 are disposed below the main body side conveyance path 13. The printing paper supply path 12 extends obliquely upward toward the rear of the printer from the rear end portion of the printer front-rear direction Y in the paper feed cassette mounting portion 5, curves in front of the printer, and is connected to the main body side conveyance path 13. . The print paper P stored in the paper feed cassette 6 is sent out to the print paper supply path 12 by the paper feed roller 15. The fed printing paper P is fed one by one through the nip portion of the retard roller 16 and the transport roller 17 and transported toward the main body side transport path 13 through the nip portion of the transport roller 17 and the driven roller 18. Is done.

  The main body side conveyance path 13 is a conveyance path that extends in a straight line substantially horizontally in the longitudinal direction Y of the printer and reaches the discharge port 8. A paper edge sensor 20, a paper feed roller pair 21, a print head 22, a first paper discharge roller pair 23, and a second paper discharge roller pair 24 are arranged in order from the back of the printer toward the front of the printer along the main body side conveyance path 13. Has been placed.

  The paper edge sensor 20 and the print head 22 are located above the main body side conveyance path 13. A platen 25 is arranged at a printing position A on the printing paper P by the print head 22 in the main body side conveyance path 13 with a predetermined gap from the print head 22. The print head 22 is an ink jet head, and is reciprocated by a head moving mechanism 26 in a printer width direction X that coincides with the width direction of the main body side conveyance path 13. The head moving mechanism 26 includes a carriage 27 on which the print head 22 is mounted, a carriage guide shaft 28 extending in the printer width direction orthogonal to the transport direction of the printing paper P along the main body-side transport path 13, and the carriage guide shaft 28. A carriage moving mechanism 29 for moving the carriage 27 along the axis and a carriage motor 30 are provided above the main body side conveyance path 13.

  The transport roller 17 and the driven roller 18, the paper feed roller pair 21, the first paper discharge roller pair 23, and the second paper discharge roller pair 24 are the main body side transport mechanism 31 that transports the printing paper P along the main body side transport path 13. Is configured. The main body side transport mechanism 31 is driven by a transport motor 32 arranged on the side of the paper feed cassette 6 in the printer width direction X. The main body-side transport mechanism 31 transports the printing paper P toward the front of the printer by driving the transport motor 32 in the forward direction, and transports the printing paper P toward the rear of the printer by driving the transport motor 32 in the reverse direction. . Printing by the print head 22 is performed when the printing paper P passes through the printing position A toward the front of the printer.

  The reversing conveyance path 14 is arranged below the printer vertical direction Z with respect to the main body side conveyance path 13 and is a conveyance path that draws a loop in the printer vertical direction Z as a whole. In the reversing transport path 14, a first reversing transport roller pair 41 and a second reversing transport roller pair 42 are arranged as a reversing transport mechanism 40 that transports the printing paper P along the reversing transport path 14. ing. The reversing transport mechanism 40 is driven by a reversing transport motor 43 disposed inside the reversing transport path 14. The reverse transport mechanism 40 transports the printing paper P fed from the main body side transport path 13 along the reverse transport path 14 in the clockwise direction in FIG. The printing paper P passes through the reversing conveyance path 14 so that the front and back are reversed, and is returned to the main body side conveying path 13.

  When duplex printing is performed by the printer 1, first, the printing paper P stored in the paper feeding cassette 6 is sent out to the printing paper supply path 12 by the paper feeding roller 15. Further, the transport motor 32 is driven in the forward direction, and the print paper P sent out to the print paper supply path 12 is transported by the retard roller 16 and the transport roller 17 and sent out to the main body side transport path 13. The printing paper P sent out to the main body side conveyance path 13 is conveyed to the front of the printer by the main body side conveyance mechanism 31 and passed through the printing position A. At the printing position A, a printing operation for ejecting ink droplets while moving the print head 22 in the printer width direction X is performed in synchronization with the conveyance operation of the printing paper P by the main body side conveyance mechanism 31. Thereby, printing is performed on the surface of the printing paper P.

  When printing on the surface of the printing paper P is completed, the transport motor 32 is driven in the reverse direction. Further, the reversing transport motor 43 is driven. By driving the reversing transport motor 43, the printing paper P is transported toward the rear of the printer by the main body side transport mechanism 31 and is sent from the main body side transport path 13 to the reversing transport path 14. The printing paper P sent to the reversing transport path 14 is transported along the reversing transport path 14 by the reversing transport mechanism 40 and returned to the main body transport path 13 with the front and back sides reversed.

  The printing paper P returned to the main body side conveyance path 13 is again conveyed to the front of the printer by the main body side conveyance mechanism 31 and passed through the printing position A by the print head 22. At the printing position A, a printing operation for ejecting ink droplets while moving the print head 22 in the printer width direction X is performed in synchronization with the conveyance operation of the printing paper P by the main body side conveyance mechanism 31. Thereby, printing is performed on the back surface of the printing paper P. When printing on the back surface of the printing paper P is completed, the main body side transport mechanism 31 further transports the printing paper P to the front of the printer and discharges it from the paper discharge port 8.

(About the head movement mechanism and movement path of the print head)
Here, the head moving mechanism and moving path of the print head will be described with reference to FIGS. FIG. 3 is a perspective view of the printer with the outer case removed as seen from the front of the printer, and FIG. 4 is a perspective view of the printer with the outer case removed as seen from the rear of the printer. The X direction, Y direction, and Z direction shown in FIGS. 3 and 4 indicate the same directions as the X direction, Y direction, and Z direction shown in FIG.

  As shown in FIG. 3, the carriage 27 supports the print head 22 in front of the printer with respect to the carriage guide shaft 28. The carriage moving mechanism 29 and the carriage motor 30 are configured on the rear side of the printer with respect to the carriage guide shaft 28.

  One end portion of the carriage guide shaft 28 is supported by a first side frame 45 extending in the front-rear direction of the printer and upward at one end portion in the printer width direction X. The first side frame 45 is arranged at a predetermined distance from the main body side conveyance path 13. The other end portion of the carriage guide shaft 28 is supported by a second side frame 46 that extends in parallel with the first side frame 45 at the other end portion in the printer width direction X. The second side frame 46 is disposed at a predetermined interval from the main body side conveyance path 13. The carriage moving mechanism 29 includes a pair of pulleys 47 disposed in the vicinity of the first side frame 45 and in the vicinity of the second side frame 46, and a timing belt 48 spanned between the pair of pulleys 47. I have. The timing belt 48 is stretched along the carriage guide shaft 28. A carriage 27 is connected to the timing belt 48, and the driving force of the carriage motor 30 is transmitted to one pulley 47. Accordingly, the timing belt 48 is rotated by the drive of the carriage motor 30, whereby the carriage 27 moves along the carriage guide shaft 28.

  As shown in FIG. 4, the home position (first outer position) B of the print head 22 is between the main body side conveyance path 13 and the first side frame 45. A maintenance mechanism 50 for the print head 22 is disposed at the home position B. The maintenance mechanism 50 includes a head cap 51 disposed so as to face the ink nozzle surface 22a of the print head 22 disposed at the home position B, and the head cap 51 is moved up and down in a direction toward and away from the ink nozzle surface 22a. And a cap lifting mechanism (not shown). When the printer 1 is in a standby state, the print head 22 is disposed at the home position B by the head moving mechanism 26, and the ink nozzle surface 22 a is covered by the head cap 51. The print head 22 is disposed at the home position B by the head moving mechanism 26 every time a predetermined time elapses, and performs a flushing operation for ejecting ink droplets toward the head cap 51. The flushing operation is a maintenance operation that eliminates nozzle clogging caused by ink thickening or the like.

  Between the main body side conveyance path 13 and the second side frame 46 is an away position (second outer position) C of the print head 22. The away position C is printed when printing is performed on the paper edge portion of the print paper P in the paper width direction when printing is performed on the print paper P transported through the main body-side transport path 13 while moving the print head 22 in the printer width direction X. This is a space for retracting the head 22 outward from the main body side conveyance path 13. The away position C is provided with a lower frame 53 that can face the ink nozzle surface 22a of the print head 22 arranged at the away position C.

  The print head 22 linearly moves between the home position B and the away position C along the carriage guide shaft 28. Accordingly, a space including the home position B and the away position C and continuing between the home position B and the away position C is the movement path S of the print head 22.

  It should be noted that the printer 1 of this example is located at a position behind the printer in the movement path S, that is, at a position adjacent to the timing belt 48 at the rear of the printer, and at the upper end side portion of the first side frame 45 and the second side frame 46. A rear frame 55 is provided. In addition, the front frame 56 that spans the upper end side portion of the first side frame 45 and the second side frame 46 at a position in front of the printer in the movement path S, that is, at a position adjacent to the print head 22 in front of the printer. It has. The rear frame 55 and the front frame 56 extend in the printer width direction X in a state of being parallel to each other. The front frame 56 supports a portion of a flexible ink flow path (not shown) that supplies ink to the print head 22.

(Charging member)
Here, in the printer 1 in which the inkjet head is mounted as the print head 22, during the printing operation or the flushing operation, a part of the ink droplets ejected from the print head 22 until the print paper P or the head cap 51 is reached. It may become ink mist and float inside the outer case 9. The floating ink mist adheres to the components in the outer case 9 and contaminates them. Further, since the ink mist is charged due to charging of the ink nozzle surface 22a of the print head 22 and charging of the platen 25, it adheres to charged components such as sensors such as the paper edge sensor 20 and a control board. , These may cause problems.

  With respect to such a problem, the printer 1 according to the present embodiment includes a charging filter 60 (first to third charging filters 61, 62, as a charging member) that collects ink mist at a plurality of locations inside the outer case 9. 63) is attached. In the following description, the charging filter in general refers to the charging filter 60, and the individual charging filter refers to, for example, the first charging filter 61, the second charging filter 62, and the third charging filter. Like 63.

  Each charging filter 60 is configured by an electret body made of a porous structure such as a nonwoven fabric made of a thermoplastic resin such as polypropylene. An electret body is a dielectric that maintains permanent polarization. The first to third charging filters 61, 62, 63 are in the form of a sheet, and the front and back surfaces are filter surfaces 61a, 62a, 63a as one surface.

  Although the charging filter 60 is commercially available and is used for capturing and removing small dust in the atmosphere, the inventors have obtained knowledge that the charging filter 60 is excellent in collecting ink mist. . That is, the inventors have confirmed through experiments that the ink mist is well collected by the charging filter 60. If the charging filter 60 is used, ink mist can be collected without complicating the structure of the printer 1 and without consuming power.

  Each of the first to third charging filters 61, 62, 63 is disposed at a position where the filter surfaces 61 a, 62 a, 63 a can face the print head 22. That is, the filter surfaces 61a, 62a, 63a of the first to third charging filters 61, 62, 63 are exposed to the movement path S.

  As shown in FIG. 3, the first charging filter 61 is affixed to the rear frame 55 with an adhesive. Since the rear frame 55 extends along the movement path S of the print head 22, the first charging filter 61 is attached to the rear frame 55, so that the filter surface 61a is moved over the movement path S over a wide range. Can be exposed to. Here, in the movement path S, the ink mist tends to float due to the airflow generated due to the movement of the print head 22. Therefore, if the first charging filter 61 is attached to the rear frame 55, the floating ink mist can be collected well.

  Further, static electricity is likely to be generated between the carriage guide shaft 28 and the carriage 27 due to these sliding movements. Accordingly, the carriage guide shaft 28 is easily charged, and the charged ink mist is attracted to the vicinity of the carriage guide shaft 28. Also, static electricity is likely to be generated between the timing belt 48 and the pulley 47 due to these sliding movements. Therefore, the timing belt 48 is easily charged, and the charged ink mist is attracted to the vicinity of the timing belt 48. Therefore, by arranging the first charging filter 61 at a position facing the carriage guide shaft 28, the ink mist can be easily collected.

  As shown in FIG. 4, the second charging filter 62 is affixed to the front frame 56 with an adhesive. Since the front frame 56 extends along the movement path S, the filter surface 62a can be exposed to the movement path S over a wide range by attaching the second charging filter 62 to the front frame 56. Further, since the front frame 56 is provided at a position adjacent to the print head 22, if the second charging filter 62 is attached to the front frame 56, the air flow generated due to the movement of the print head 22 is caused. It can collect floating ink mist well.

  The third charging filter 63 is attached to the lower frame 53 of the away position C with an adhesive. The away position C is a space for retracting the print head 22, and such a space tends to be an air flow path. Therefore, if the third charging filter 63 is attached to the lower frame 53 so that the filter surface 63a can be opposed to the print head 22, the ink mist is well collected, and the ink mist passes through this space to the exterior case 9. It is possible to prevent or suppress the movement to various places within.

(Modification of the first embodiment)
Although the first embodiment of the present invention has been described above, various modifications can be made to the first embodiment without departing from the spirit of the present invention. For example, modifications other than the first embodiment are as follows.

  (First Modification) In the first embodiment, the first to third charging filters 61, 62, and 63 are arranged on the rear frame 55, the front frame 56, and the lower frame 53. It is not limited. If the charging filter 60 is disposed on at least one of these frames, the ink mist can be collected well.

  (Second Modification) In addition to the rear frame 55, the front frame 56, and the lower frame 53, the surface on the home position B side of the first side frame 45, the away position C of the second side frame 46 The charging filter 60 may be attached to at least one of the surfaces on the side. In this way, ink mist that moves forward in the movement direction due to the positive pressure associated with the movement of the print head 22 in the printer width direction X, or ink that rises behind in the movement direction due to the negative pressure associated with the movement of the print head 22. Mist can be collected by the charging filter 60.

  (Third Modification) In the first embodiment, the first to third charging filters 61, 62, 63 are attached to the frames 53, 55, 56 with an adhesive. However, the present invention is not limited to this. . The first to third charging filters 61, 62, 63 may be detachably attached to the frames 53, 55, 56. In this case, the first to third charging filters 61, 62, 63 can be housed inside the shallow tray, and the tray can be detachably attached to the frames 53, 55, 56. If the first to third charging filters 61, 62, and 63 can be attached and detached, the first to third charging filters 61, 62, and 63 that are contaminated by collecting ink mist are replaced with new charging filters 60. Easy to do.

  (Fourth Modification) The first embodiment is an example in which the charging filter 60 is attached to the serial type ink jet printer 1, but the present invention is not limited to this. Even if the charging filter 60 is attached to a line-type inkjet printer in which the print head 22 does not move, the ink mist floating in the exterior case 9 can be absorbed. In this case, the charging filter 60 may be disposed at a position where the filter surface corresponds to the print head 22.

(Second Embodiment)
Here, the second embodiment will be described with reference to FIG. FIG. 5 is a perspective view illustrating a state in which the opening / closing lid of the printer according to the second embodiment is opened. In addition, about the structure and content similar to 1st Embodiment, a code | symbol is made equal and description is abbreviate | omitted.

  In the first embodiment, the case where the first to third charging filters 61, 62, and 63 are arranged in the rear frame 55, the front frame 56, and the lower frame 53 has been described as an example, but the present invention is not limited to this. . As shown in FIG. 5, in the printer 1 according to the second embodiment, a fourth charging filter 64 may be attached to the inner surface of the opening / closing lid 11 provided in the exterior case 9. The open / close lid 11 opens a part of the upper part of the moving path S of the print head 22, and when the printing paper P is jammed at the printing position A, the printing paper P is transported on the main body side. It is opened and closed when the recovery work to be removed from 13 is performed. Since the opening / closing lid 11 is provided adjacent to the movement path S, the filter surface 64 a can be exposed to the movement path S if the fourth charging filter 64 is attached to the inner surface of the opening / closing lid 11. Accordingly, the ink mist that rises due to the airflow generated with the movement of the print head 22 can be collected by the fourth charging filter 64. Further, when the opening / closing lid 11 is opened, the fourth charging filter 64 is exposed to the outside of the exterior case 9. Therefore, if the fourth charging filter 64 is detachable from the opening / closing lid 11, the replacement becomes easy. .

(Third embodiment)
Here, the third embodiment will be described with reference to FIG. FIG. 6 is a perspective view when the print head, the head moving mechanism, and the ink flow path of the printer according to the third embodiment are viewed from the obliquely lower front side. Specifically, the print head and the carriage are moved to the home position. Indicates the state. In addition, about the structure and content similar to 1st Embodiment and 2nd Embodiment, a code | symbol is made equal and description is abbreviate | omitted.

  The inventors of the present invention have not only arranged the charging filter 60 as the charging member in the range related to the moving region of the carriage 27 on which the print head 22 is mounted but also the carriage 27 on which the print head 22 is mounted. Or even if it arrange | positions to the print head 22 grade | etc., The knowledge that the charge filter 60 was excellent in the collection of ink mist was acquired. The printer 1 according to the third embodiment is an example in which the charging filter 60 is disposed on the carriage 27 or the print head 22 on which the print head 22 is mounted. Hereinafter, details will be described.

(Regarding the arrangement example of the charging member)
In the printer 1 according to the third embodiment, a charging filter 60 (fifth charging filter 65) as a charging member is attached to a part of the side surface of the carriage 27.
As shown in FIG. 4, an opening is formed at the center of the bottom surface 27 a of the carriage 27, and a nozzle plate 80 provided at the lower end of the print head 22 protrudes downward in the printer vertical direction Z from this opening. Ink nozzles are formed on the bottom surface 81 of the nozzle plate 80, and the bottom surface 81 constitutes the ink nozzle surface 22 a of the print head 22.

  On the bottom surface 27 a of the carriage 27, a rectangular parallelepiped projecting portion 27 b that protrudes downward is formed at a position adjacent to the away position C side with respect to the nozzle plate 80. The fifth charging filter 65 is attached to the side surface 27c of the protruding portion 27b facing the away position C side. The side surface 27c is a side surface that faces the traveling direction when the print head 22 and the carriage 27 move to the away position C side (one end side of the scanning section S). The projecting portion 27b has a projecting dimension from the bottom surface 27a smaller than the nozzle plate 80, and the side surface 27c is located above the ink nozzle surface 22a.

  As described above, in the printer 1 according to the third embodiment, since the fifth charging filter 65 is attached to the side surface 27c of the protruding portion 27b provided on the bottom surface 27a of the carriage 27, the discharge is performed from the ink nozzle surface 22a. Ink mist separated from the ink droplet main body to be collected can be collected. Therefore, the floating of fine ink droplets is suppressed.

  In the printer 1, the side surface 27c to which the fifth charging filter 65 is attached is a side surface that faces the traveling direction when the carriage 27 moves to the away position C side. When the fifth charging filter 65 is affixed to the side surface 27c, when performing a flushing operation for discharging ink from the print head 22 toward the maintenance mechanism 50 at the home position B during printing standby, the main body side conveyance path 13 is used. And the home position B, ink mist generated by the flushing operation can be collected.

  Therefore, it is possible to suppress the ink mist generated by the flushing operation from flowing out to the main body side conveyance path 13. Further, since the side surface on the away position C side is a portion facing the passage of the ink mist floating in the apparatus, the floating ink mist can be collected by disposing the fifth charging filter 65 here. . Further, during the printing operation, a negative pressure is generated in the vicinity of the side surface 27c to which the fifth charging filter 65 is attached while the print head 22 and the carriage 27 are moving toward the away position C. Ink mist generated when ink is ejected can be collected effectively.

  Here, the charging filter 60 may be attached to the other side surface of the carriage 27 positioned above the protruding portion 27b. For example, the charging filter 60 can be attached to the side surface of the carriage 27 that faces the traveling direction when moving to the home position B side (the other end side of the scanning section S). When the charging filter 60 is attached to the side surface of the carriage 27 facing the home position B side, when the print head 22 and the carriage 27 return to the home position B, the vicinity of the charging filter 60 becomes negative pressure. Accordingly, it is possible to suppress the floating of the ink droplets generated by the ink ejection while the print head 22 and the carriage 27 return to the home position B. Further, the charging filter 60 can be attached to both the side surface facing the home position B side and the side surface 27c facing the away position C side.

(Modification of the third embodiment)
Although the third embodiment of the present invention has been described above, various modifications can be made to the third embodiment without departing from the spirit of the present invention. For example, modifications other than the third embodiment are as follows.

  (First Modification) A first modification will be described with reference to FIG. FIG. 7 is a diagram for explaining a first modification of the third embodiment, and more specifically, is a perspective view showing a charging member attaching position. As described above, in the print head 22, the nozzle plate 80 protrudes from the bottom surface 27 a of the carriage 27. As shown in FIGS. 6 and 7, the nozzle plate 80 has three side surfaces exposed to the outside, that is, a side surface 82 a that faces the traveling direction when moving to the away position C side, and side surfaces 82 b and 82 c adjacent to the side surface 82 a. It is in a state. On the other hand, the side surface located behind the side surface 82 a is covered with a rib protruding downward from the bottom surface of the carriage 27.

  In this example, as shown in FIG. 7, the sixth charging filter 66 is attached to the side surface 82a of the nozzle plate 80, which is the part of the print head 22 that faces the traveling direction when moving to the away position C side. . As described above, when a part of the side surface of the print head 22 is exposed to the outside, the effect similar to the above embodiment can be obtained by attaching the charging filter 60 to the side surface. Further, if the side surface of the nozzle plate 80 that faces the traveling direction when returning to the home position B is exposed to the outside, the charging filter 60 can be attached to this surface. Further, the charging filter 60 can be attached to both side surfaces of the carriage 27 and the print head 22 (nozzle plate 80).

(Modification)
The first to third embodiments of the present invention have been described above, but various modifications can be made to the first to third embodiments without departing from the spirit of the present invention. For example, modifications other than the first to third embodiments are as follows.

  (First Modification) The above first to third embodiments are examples in which the charging filter 60 is attached to the serial type ink jet printer 1, but the present invention is not limited to this. Even if the charging filter 60 is attached to a line-type inkjet printer in which the print head 22 does not move, the ink mist floating in the exterior case 9 can be absorbed. In this case, the charging filter 60 may be disposed at a position where the filter surface corresponds to the line type print head. Further, the charging filter 60 may be disposed at a position corresponding to a space where the filter surface is assumed to be a floating space of ink mist with respect to the line type print head.

  (Second Modification) The first and second embodiments have been described by taking as an example the case where the charging filter 60 is disposed in a range related to the moving region of the carriage 27 on which the print head 22 is mounted. In the third embodiment, the case where the charging filter 60 is disposed on the carriage 27 on which the print head 22 is mounted or the print head 22 is described as an example. However, it is not limited to these. The arrangement of the charging filter 60 may be a combination thereof. The combined effect can be expected.

  DESCRIPTION OF SYMBOLS 1 ... Printer as a printing apparatus, 2 ... Printer main-body part, 6 ... Paper feed cassette, 7 ... Paper discharge tray, 8 ... Paper discharge port, 9 ... Outer case, 10 ... Ink cartridge mounting part, 11 ... Opening / closing lid, 12 DESCRIPTION OF SYMBOLS ... Printing paper supply path, 13 ... Main body side conveyance path, 14 ... Reverse conveyance path, 17 ... Conveyance roller, 18 ... Driven roller, 21 ... Paper feed roller pair, 22 ... Print head as inkjet head, 22a ... Ink nozzle Surface, 23... First discharge roller pair, 24. Second discharge roller pair, 25. Platen, 26... Head movement mechanism, 27. Carriage, 28. Carriage guide shaft, 29. 31 ... Main body side transport mechanism, 40 ... Reverse transport mechanism, 45 ... First side frame, 46 ... Second side frame, 47 ... Pulley, 48 ... Timing Belt, 50 ... maintenance mechanism, 53 ... lower frame, 55 ... rear frame, 56 ... front frame, 60 ... charging filter, 61 ... first charging filter, 62 ... second charging filter, 63 ... third Charging filter, 64 ... fourth charging filter, 65 ... fifth charging filter, 66 ... sixth charging filter, 80 ... nozzle plate, A ... printing position, B ... home position (first outer position), C ... Away position (second outer position), P: printing paper, S: movement path.

Claims (4)

An inkjet head that ejects ink onto a print medium;
A charging member;
The charging member is disposed at a position where one surface of the charging member can face the inkjet head.
A head moving mechanism for moving the inkjet head along a predetermined movement path;
The charging member has the one surface exposed to the movement path,
Having a pair of side frames disposed forward and backward in the moving direction of the inkjet head with the moving path in between,
The printing apparatus, wherein the charging member is attached to at least one of the pair of side frames. An inkjet head that ejects ink onto a print medium;
A charging member;
The charging member is disposed at a position where one surface of the charging member can face the inkjet head.
And
A head moving mechanism for moving the inkjet head along a predetermined movement path;
,
The charging member has the one surface exposed to the movement path,
A medium conveyance path extending via a printing position by the inkjet head;
The head moving mechanism reciprocally moves the inkjet head between a first outer position deviated on one side in the width direction of the medium conveyance path and a second outer position deviated on the other side;
A head maintenance mechanism for maintaining the inkjet head is disposed at the first outer position,
The second outer position is provided with a lower frame that can face the ink nozzle surface of the inkjet head,
The charging member, printing device characterized in that attached to the lower frame. The charging member, the printing apparatus according to請Motomeko 1 or claim 2, characterized in that mounted detachably. 4. The printing apparatus according to claim 1 , wherein the charging member is a charging filter made of a porous electret body. 5.

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