JP2006218689A - Recording apparatus and liquid jetting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording apparatus which can prevent interference between a recording head and a medium to be recorded in a PG switching operation from occurring, and can perform the PG switching operation in a short time. <P>SOLUTION: A gap adjusting means 51 displaces a position of an axial center of a carriage guide shaft 34 by rotating the carriage guide shaft 34, and adjusts a gap between the medium to be recorded and the recording head. A driving force transmitting means 67 transmits a driving force from a driving motor 52 to the carriage guide shaft 34. A gear 64 displacing a mating position for mating an adjoining gear and a non-mating position which does not mate the adjoining gear by being pushed by the carriage, is arranged on a side of an end part near a home position of the carriage. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a recording apparatus that performs recording on a recording medium. The present invention also relates to a liquid ejecting apparatus.

Here, the liquid ejecting apparatus uses an ink jet recording head, and is not limited to a recording apparatus such as a printer, a copying machine, and a facsimile machine that discharges ink from the recording head to perform recording on a recording medium. And a device that ejects a liquid corresponding to the application from a liquid ejecting head corresponding to the ink jet recording head to an ejected medium corresponding to a recording medium, and adheres the liquid to the ejected medium. .
In addition to the recording head, as a liquid ejecting head, a color material ejecting head used for manufacturing a color filter such as a liquid crystal display, and an electrode material (conductive paste) used for forming an electrode such as an organic EL display or a surface emitting display (FED) Examples thereof include an ejection head, a bioorganic matter ejection head used for biochip production, and a sample ejection head as a precision pipette.

  In order to appropriately perform recording on various types of recording media, more specifically on various recording media having different thicknesses, a recording apparatus or a liquid ejecting apparatus typified by a fax or a printer is disclosed in Patent Literature As shown in FIG. 1, there is one configured to be able to adjust (switch) a gap (hereinafter referred to as “PG”) between a recording head and a recording medium.

  In many of such recording apparatuses, as shown in Patent Document 1, the carriage guide shaft has an eccentric shaft structure, and the PG is switched by moving the carriage up and down as the carriage guide shaft rotates. Has been. Further, as shown in Patent Document 1, there is a configuration in which PG is not switched manually but automatically switched by the driving force of the motor.

JP 2002-67428 A

By the way, providing a dedicated motor for switching the PG causes an increase in cost. For example, it is also used as a motor for driving a conveyance roller for conveying a recording medium, and from the motor as necessary. It is desirable to be configured to transmit power to the carriage guide shaft or to cut it.
Here, the power transmission from the motor to the carriage guide shaft and the switching operation for cutting can be performed by the carriage. In other words, it is also possible to provide a configuration in which a member to be engaged is provided at a position that can be engaged with the carriage, and the power transmission from the motor to the carriage guide shaft is switched by pushing the member to be engaged by the carriage. is there.

Such a configuration can reduce the number of parts and is preferable in terms of cost. On the other hand, the following problems arise. That is, if a recording sheet exists at a position facing the recording head in the process in which the carriage pushes the engaged member, the recording head rubs against the recording sheet or the recording sheet is not switched to an appropriate PG for the recording sheet. There is a possibility that the head may collide with the side edge of the recording paper to cause a paper jam. Further, when a tray on which a thin plate-like body such as an optical disk is set is inserted into the transport path in a state where the PG is not sufficiently large, there is a possibility that the tray will similarly collide with the recording head and eventually cause a failure. .
If the carriage travel distance is long when the carriage pushes the engaged member, the PG switching operation takes time.

  Therefore, the present invention has been made in view of such a situation, and an object of the present invention is to prevent a recording head and a recording medium from being interfered with in a PG switching operation and to perform a PG switching operation in a short time. To provide an apparatus.

  In order to solve the above-mentioned problems, a first aspect of the present invention provides a carriage that supports a recording head for recording on a recording medium and reciprocates in the main scanning direction, and guides the carriage in the main scanning direction. A recording apparatus comprising: a carriage guide shaft; and a gap adjusting unit that adjusts a gap between the recording medium and the recording head by displacing a position of an axis of the carriage guide shaft. The gap adjusting means is configured to displace the axis position of the carriage guide shaft by rotating the carriage guide shaft, and a drive motor for rotating the carriage guide shaft, and a trigger from the carriage. A power transmission state in which power is transmitted from the drive motor to the carriage guide shaft, and whether the drive motor A power transmission unit configured to be able to switch between a power cut state in which power is not transmitted to the carriage guide shaft, and an engaged member that receives a trigger from the carriage in the power transmission unit is configured to move the carriage. It is characterized by being arranged on the side of the end close to the home position in the region.

  According to this aspect, since the engaged member that receives the trigger from the carriage is arranged on the end side close to the home position in the carriage movement region, the carriage goes to push the engaged member from the home position. There is no need to cross the transport path of the recording medium in the process, that is, there is no interference with the recording medium. Therefore, even if PG is set in an inappropriate state, interference between the recording head and the recording medium can be prevented. Further, the travel distance of the carriage when pushing the engaged member can be extremely shortened, and the PG switching operation can be performed in a short time.

According to a second aspect of the present invention, in the first aspect, the engaged member is configured such that a tray transport path capable of transporting a tray on which a thin plate-like body as a recording medium can be transported is provided in the carriage movement region. The recording apparatus is provided at a position sandwiching a home position of the carriage with respect to the arrangement position.
According to this aspect, a tray transport path capable of transporting a tray on which a thin plate-like body as a recording medium can be transported is provided with respect to the position where the engaged member is disposed in the carriage movement region. Since it is provided at a position that sandwiches the home position, the carriage does not interfere with the tray in the process of pushing the engaged member from the home position, and the interference between the recording head and the tray can be prevented, resulting in a failure or the like. There is no.

  According to a third aspect of the present invention, there is provided a carriage capable of supporting a recording head for recording on a recording medium and reciprocating in a main scanning direction, a carriage guide shaft for guiding the carriage in the main scanning direction, and the carriage guide. Gap adjusting means for adjusting the gap between the recording medium and the recording head by displacing the position of the axis of the shaft, wherein the recording apparatus is a recording medium A tray transport path capable of transporting a tray on which the thin plate-like body can be set, is configured to be able to execute recording on the thin plate-like body set on the tray by the recording head, and the gap adjusting means includes the carriage By rotating the guide shaft, the shaft center position of the carriage guide shaft is displaced, and the carriage guide shaft is A drive motor to be moved, a power transmission state in which power is transmitted from the drive motor to the carriage guide shaft by receiving a trigger from the carriage, and a power cut state in which power is not transmitted from the drive motor to the carriage guide shaft , A power transmission means configured to be switchable, and an engaged member that receives a trigger from the carriage in the power transmission means is configured to move the carriage with respect to the tray conveyance path in the carriage movement region. It is arranged at a position sandwiching the home position.

  According to this aspect, since the engaged member that receives the trigger from the carriage is disposed in the carriage movement region at a position that sandwiches the carriage home position with respect to the tray conveyance path, the carriage is moved from the home position. There is no need to straddle the tray transport path in the process of pushing the engaging member, and there is no interference with the tray. Accordingly, even if PG is set at an inappropriate position, interference between the recording head and the tray can be prevented. Further, since the travel distance of the carriage when the trigger member is pushed can be extremely shortened, the PG switching operation can be performed in a short time.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the drive motor, which constitutes a transport unit that transports a recording medium, is driven to rotate upstream of the recording head. A conveyance drive roller is provided, and the power transmission means is configured to receive power from the conveyance drive roller and transmit power to the carriage guide shaft.
According to this aspect, since the drive motor that rotationally drives the carriage guide shaft is a drive motor that rotationally drives the conveyance drive roller provided on the upstream side of the recording head, it is dedicated to rotationally drive the carriage guide shaft. The cost can be reduced as compared with a configuration using such a motor.

According to a fifth aspect of the present invention, in the fourth aspect, a rotation-driven feeding roller that constitutes a feeding unit that feeds a recording medium is provided on the upstream side of the conveying unit. The feeding roller is configured to be driven to rotate by receiving power from the transport driving roller, and the power transmission unit is configured to receive power from the feeding roller and transmit power to the carriage guide shaft. It is characterized by being.
According to this aspect, the carriage guide shaft obtains power from the drive motor via the feed roller that is rotationally driven in response to the power of the transport drive roller, that is, the transport drive roller, the feed roller, and the carriage By driving the guide shaft with one drive motor, the recording apparatus can be configured at a lower cost.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the power transmission unit includes a toothed wheel train, and the engaged member configures the toothed wheel train. The spur gear has a rotation shaft parallel to the main scanning direction, and is provided so as to be slidable in the axial direction of the rotation shaft so that the meshing position meshes with the adjacent gear and the non-meshing with the adjacent gear. The meshing position is displaceable.
According to this aspect, the power transmission state in which power is transmitted from the drive motor to the carriage guide shaft and the power cut state in which power is not transmitted from the drive motor to the carriage guide shaft are switched with a simple and inexpensive configuration. Can be possible.

  According to a seventh aspect of the present invention, there is provided a carriage that supports a liquid ejecting head that ejects liquid onto an ejected medium and reciprocates in a main scanning direction, a carriage guide shaft that guides the carriage in the main scanning direction, A liquid ejecting apparatus comprising: a gap adjusting unit that adjusts a gap between an ejected medium and the liquid ejecting head by displacing a position of an axis of a carriage guide shaft, wherein the gap adjusting unit includes: By rotating the carriage guide shaft, the shaft center position of the carriage guide shaft is displaced, and by receiving a trigger from the drive motor and the carriage for rotating the carriage guide shaft, A power transmission state in which power is transmitted from the drive motor to the carriage guide shaft; And a power transmission means configured to be capable of switching between a power cut state in which power is not transmitted to the wedge guide shaft, and an engaged member that receives a trigger from the carriage in the power transmission means is provided in the carriage movement region. It is arranged at the end on the home position side.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Hereinafter, an outline of an ink jet printer (hereinafter referred to as “printer”) 1 as an example of a recording apparatus or a liquid ejecting apparatus according to the present invention will be described first with reference to FIGS. 1 and 2. Here, FIG. 1 is an external perspective view of the main body of the printer 1 (with the exterior case removed), and FIG. 2 is a cross-sectional side view of the same. Hereinafter, the right direction (front side of the printer) in FIG. 2 is referred to as “downstream side” of the paper or tray conveyance path, and the left direction (back side of the printer) is referred to as “upstream side”.

  The printer 1 includes a feeding device 2 capable of setting a recording sheet (mainly cut sheet paper: hereinafter referred to as “sheet P”) as an example of “recording medium” and “ejection medium” in an inclined posture at the rear part, The paper P is fed from the feeding device 2 toward the recording medium conveying means 4 on the downstream side. The fed paper P is conveyed by the recording medium conveying means 4 to the recording means 3 on the downstream side, and recording is executed. Then, the sheet P on which recording is performed by the recording unit 3 is discharged to the front of the apparatus by the recording medium discharge unit 5 on the downstream side.

  In the printer 1, the tray 50 having the setting portion 52 on which the optical disk D can be set is configured to be transported by the recording medium transporting means 4, and the label of the optical disk D set on the tray 50 by the recording means 3. It is possible to record on the surface. Reference numeral 7 denotes a tray guide for supporting the tray 50, and the tray 50 is inserted from the front side of the printer 1 toward the rear side via the tray guide 7, and is sub-scan fed by the recording medium conveying means 4. .

Hereinafter, components on the paper conveyance path of the printer 1 will be described in more detail. The feeding device 2 includes a hopper 11, a feeding roller 12, a retard roller 13, and a return lever 14.
The hopper 11 is formed of a plate-like body, and is configured to be swingable around an upper swing fulcrum (not shown). By swinging, the paper P supported in an inclined posture is fed onto the hopper 11. The roller 12 is pressed against or separated from the feeding roller 12. The feeding roller 12 has a substantially D shape when viewed from the side, and feeds the uppermost sheet P pressed by the arc portion to the downstream side, while the recording medium after the sheet P is fed. During transport of the paper P by the transport means 4, the flat portion is controlled to face the paper P as shown in the figure so as not to cause a transport load.

  The retard roller 13 is provided so as to be in press contact with the arc portion of the feeding roller 12. When only one sheet P is fed without the double feeding of the sheet P, the retard roller 13 contacts the sheet P and rotates (clockwise in FIG. 2) to feed the sheet P. When there are a plurality of sheets between the feed roller 12 and the retard roller 13, the friction coefficient between the sheets is lower than the friction coefficient between the sheet P and the retard roller 13. Become. Therefore, this prevents the next and subsequent sheets P, which are to be double-fed by the uppermost sheet P to be fed, from traveling from the retard roller 13 to the downstream side, thereby preventing double feeding. The return lever 14 is provided so as to be rotatable, and has the effect of returning the next and subsequent sheets P about to be double fed onto the hopper 11.

  Between the feeding device 2 and the recording medium conveying means 4, a detecting means (not shown) for detecting the passage of the paper P, a feeding posture of the paper P, and a feeding roller 12 for the paper P are formed. A guide roller 26 is provided to prevent the contact load to reduce the conveyance load. In the present embodiment, the guide roller 26 is pivotally supported at the upstream end of the paper guide top 24 so as to be freely rotatable.

  The recording medium transport unit 4 provided on the downstream side of the feeding device 2 includes a transport drive roller 30 that is rotationally driven by a motor, and a transport driven roller 31 that is driven to rotate while being in pressure contact with the transport drive roller 30. Configured. The transport driving roller 30 is provided with an adhesion layer formed by substantially uniformly dispersing wear-resistant particles on the outer peripheral surface of a metal shaft extending in the paper width direction, and the transport driven roller 31 has a low friction material such as an elastomer on the outer peripheral surface. A plurality of the drive driving rollers 30 are arranged in the axial direction.

Further, in the present embodiment, two transport driven rollers 31 are pivotally supported at the downstream end portion of one paper guide upper 24 so as to be freely rotatable, and three of the paper guide upper 24 are in the paper width direction, as shown in FIG. It is provided as shown. In addition, the paper guide upper 24 is provided so as to be swingable about the shaft 24 a when the shaft 24 a is pivotally supported by the main frame 23, as viewed from the side of the paper conveyance path. Is urged in a direction in pressure contact with the conveyance drive roller 30.
The sheet P that has reached the recording medium conveying unit 4 is conveyed to the recording unit 3 on the downstream side by the rotation of the conveyance driving roller 30 while being nipped by the conveyance driving roller 30 and the conveyance driven roller 31. .

  The recording unit 3 includes an inkjet recording head (hereinafter referred to as “recording head”) 36 and a paper guide lower portion 37 provided to face the recording head 36. The recording head 36 is provided at the bottom of the carriage 33. The carriage 33 is driven to reciprocate in the main scanning direction by a drive motor (not shown) while being guided by a carriage guide shaft 34 extending in the main scanning direction. In addition, the carriage 33 is equipped with an independent ink cartridge 35 for each of a plurality of colors, and supplies ink to the recording head 36.

  The paper guide 37 that defines the distance between the paper P and the recording head 36 has ribs (not shown) on the surface facing the recording head 36 and a recess (not shown) for discarding ink. , And so-called borderless printing is performed in which printing is performed without margins on the edge of the paper P by discarding the ink ejected to the area off the edge of the paper P in the recess.

  The carriage guide shaft 34 is provided so that its axial center position is displaced by the gap adjusting means 51 (see FIG. 4), thereby adjusting the gap (PG) between the paper P and the recording head 36. (Switching) is possible, but this will be described in detail later.

  Subsequently, a guide roller 43 and a recording medium discharge unit 5 are provided on the downstream side of the recording head 36. The guide roller 43 functions to prevent the paper P from being lifted from the paper guide bottom 37 and to keep the distance between the paper P and the recording head 36 constant. The recording medium discharge means 5 includes a discharge drive roller 41 that is rotationally driven by a motor (not shown), and a discharge driven roller 42 that rotates in contact with the discharge drive roller 41.

In the present embodiment, a plurality of discharge driving rollers 41 are provided in the axial direction of a shaft body that is made of a rubber roller and is rotationally driven. Further, the discharge driven roller 42 is formed by a toothed roller having a plurality of teeth on the outer periphery, and a plurality of discharge driven rollers 42 are provided on the discharge frame Assy 45 having a long shape in the main scanning direction so as to correspond to the plurality of discharge driving rollers 41. . The paper P on which recording has been performed by the recording means 3 is driven forward by the discharge drive roller 41 while being nipped by the discharge drive roller 41 and the discharge driven roller 42, so that the paper P is directed toward the front of the apparatus (not shown). Discharged.
The paper discharge frame Assy 45 is provided so as to be displaceable by a release means (not shown) so that a contact position where the discharge driven roller 42 contacts the discharge driving roller 41 and a separation position where the discharge driven roller 42 is separated from the discharge driving roller 41 can be taken. ing.

  The above is the outline of the printer 1, and the gap adjusting means for switching PG will be described in detail below with reference to FIGS. 3 is an external perspective view of the apparatus main body (main part) of the printer 1, FIG. 4 is a perspective view of the gap adjusting means, FIGS. 5 and 6 are perspective views of the right side of the apparatus main body as seen from the rear, and FIG. FIGS. 8A, 8B and 9A are plan views of the power transmission means, and FIG. 9B is a partially enlarged view of the gear 63. FIG. FIG. 10 is an explanatory view showing the principle of PG adjustment.

As shown in FIG. 4, the gap adjusting unit 51 includes a drive motor 52 and a power transmission unit 67 that transmits power from the drive motor 52 to the carriage guide shaft 34.
First, as shown in FIG. 3, the carriage guide shaft 34 is supported on the side frame left 23b side and the side frame right 23a side. More specifically, as shown in FIGS. 7 and 10, the carriage guide shaft 34 is provided so as to pass through a guide groove 75 extending in the vertical direction formed in the side frame right 23a and the side frame left 23b. Only the movement in the vertical direction is allowed, and the movement in the horizontal direction is not possible.

  A gear 66 and a gap adjustment cam 76 are attached to the shaft end 34a of the carriage guide shaft 34 on the side frame right 23a side, and the carriage guide shaft 34 and the gap adjustment cam 76 are rotated by the rotation of the gear 66. It is designed to rotate. A fixing pin 77 acting as a cam follower is provided adjacent to the gap adjusting cam 76. With this configuration, when drive is transmitted from the drive motor 52 (FIG. 4) to the gear 64, the gap adjusting cam 76 is driven to rotate, and the axial position of the carriage guide shaft 34 moves up and down by the action of the outer peripheral surface of the gap adjusting cam 76 and the fixing pin 77. As a result, the gap (PG) between the paper P and the recording head 36 can be adjusted (switched). Although not shown, a gap adjusting cam and a fixing pin similar to the gap adjusting cam 76 and the fixing pin 77 are also provided on the side frame left 23b side.

  Next, power transmission means 67 for transmitting power from the drive motor 52 to the carriage guide shaft 34 will be described in detail. As shown in detail in FIG. 4, a drive motor 52 is provided on the side of the left side frame 23 b, and a gear 54 is attached to the rotation shaft of the drive motor 52. Is engaged with the gear 55 attached thereto, so that the transport driving roller 30 is rotationally driven.

  A gear 56 is attached to the other shaft end of the transport driving roller 30, and power is transmitted to the feeding device 2 (feeding roller 12) via gears 57, 58 and 59. Further, from the gear 59, a spur gear 60b and a spur gear 60c are integrally formed via a shaft 60a, and further, the carriage guide shaft 34 via gears 61, 62, 63, 64, 65. The power of the drive motor 52 is transmitted to a gear 66 attached to the shaft end of the motor.

  As described above, the constituent elements of the power transmission path from the drive motor 52 to the carriage guide shaft 34 described above constitute the power transmission means 67 that transmits power from the drive motor 52 to the carriage guide shaft 34. The gear 58 transmits power to a pump means (not shown) (not shown) so that a negative pressure is supplied into a cap (not shown) that seals the recording head 36. As described above, the drive motor 52 serves as a common drive source for the transport drive roller 30, the feed roller 12, the pump unit (not shown), and the carriage guide shaft 34.

  Next, the toothed wheel train 68 forming the power transmission path from the gear 60 to the gear 66 will be described in detail with reference to FIGS. 5 to 9 and other drawings as appropriate. FIG. 1 shows a state where the carriage 33 is located at the home position. As shown in the drawing, the right side (the right side when viewed from the front of the apparatus) is the home position of the carriage 33 in the movement area of the carriage 33. As shown in FIGS. 5 and 6, the tooth wheel train 68 is attached to the side frame right 23 a on the side close to the home position in the movement region of the carriage 33. In other words, the tooth wheel train 68 is disposed on the end side near the home position of the carriage 33 in the movement region of the carriage 33. Reference numeral 70 denotes a cover that covers the tooth wheel train 68 and holds the gears.

  The gears 60 to 65 constituting the toothed wheel train 68 are attached to the right side frame 23a so as to be rotatable around a rotation axis parallel to the main scanning direction. Among them, the gear 63 and the gear 64 are It is provided to be slidable in the axial direction of the rotary shaft. First, the gear 64 will be described in detail below.

  As shown in FIG. 7, a hole 74 is formed in the right side frame 23a. 7 and 8, the gear 64 protrudes from the hole 74 to the inside of the right side frame 23a so that it can be engaged with an engaging portion 33a formed on the side wall on the home position side of the carriage 33. An engaged portion 64a is formed, and the gear 64 is further urged by an urging spring 78 in a direction in which the engaged portion 64a projects inward of the side frame right 23a.

  The gear 64 slides in the direction of the axis of the rotation shaft, so that the gear 64 does not mesh with the adjacent gear 63 (the position of FIG. 8A) and the mesh position with the gear 63 (FIG. 8B). 8) is displaceable, and the gear 64 is in the non-engagement position by the urging force of the urging spring 78 as shown in FIG. 8A when the carriage 33 is not pushing the engaged portion 64a. Take. That is, the power transmission means 67 is in a power cut state in which power is not transmitted from the drive motor 52 to the carriage guide shaft 34.

  Next, when the carriage 33 moves to a position adjacent to the side frame right 23a, the carriage 33 pushes the engaged portion 64a as shown in FIG. 8B, whereby the gear 64 is displaced to the meshing position. That is, the power transmission means 67 is in a power transmission state in which power is transmitted from the drive motor 52 to the carriage guide shaft 34.

  In FIG. 7, reference numerals 64b and 64b are phasing pins formed so as to protrude toward the inside of the side frame right 23a around the engaged portion 64a, and reference numeral 71 is formed on the side frame right 23a. The phase determining pins 64b and 64b are fitted into the fitting holes 71 as shown in FIGS. 7B and 8B, so that the phase of the gear 64 is set to a predetermined position. It is determined (the gear 64 cannot be rotated). In the present embodiment, it is configured to switch to a four-stage PG, and the fitting hole 71 is formed at a position corresponding to the four-stage PG.

  As described above, when adjusting (switching) PG, the carriage 33 is first moved to a position adjacent to the right side frame 23a, the gear 64 is pushed, and the gear 64 is displaced to the meshing position. Then, the PG is switched to a desired stage by rotating the drive motor 52 by a predetermined amount in this state. Then, the carriage 33 is separated from the side frame right 23a to displace the gear 64 to the non-meshing position, and the positioning pins 64b and 64b are fitted into the fitting holes 71 to fix the PG.

  The reason why the gear 63 adjacent to the gear 64 is slidable in the direction of the rotation axis is as follows. That is, when the gear 64 moves from the non-meshing position (FIG. 8A) to the meshing position (FIG. 8B), the teeth of the gear 64 may collide with the teeth of the gear 63 and may not mesh properly. There is. Therefore, even if the teeth of the gear 64 and the teeth of the gear 63 collide with each other, the gear 63 is provided so as to be slidable in the rotation axis direction so that the gear 64 can be displaced to the meshing position (see FIG. 9A). Status). Further, as shown in FIG. 9B, the tooth c of the gear 63 has a slope b so that the gear 63 and the gear 64 can smoothly mesh with each other as the gear 63 rotates. It has become. 8 and 9A, reference numeral 79 denotes a biasing spring that biases the gear 63.

  In the printer 1 configured as described above, the gear 64 serving as an engaged member that receives a trigger from the carriage 33 is located near the home position in the movement region of the carriage 33 (that is, on the side frame right 23a). It is arranged at a position sandwiching the home position of the carriage 33 with respect to the conveyance path of the paper P or the conveyance path of the tray 50. Therefore, the carriage 33 does not need to straddle the sheet P or the tray 50 in the process of pushing the gear 64 from the home position, that is, does not interfere with the sheet P or the tray 50. Therefore, even if PG is set in an inappropriate state, interference between the recording head 36 and the paper P or the tray 50 can be prevented. Further, the travel distance of the carriage 33 when pushing the gear 64 can be made extremely short, and the PG switching operation can be performed in a short time.

1 is an external perspective view of an apparatus main body of a printer according to the present invention. 1 is a side sectional view of a printer according to the present invention. 1 is an external perspective view of an apparatus main body (main part) of a printer according to the present invention. The external appearance perspective view of a gap adjustment means. The perspective view which looked at the apparatus main body right side from the rear part. The perspective view which looked at the apparatus main body right side from the rear part. The perspective view which shows the phase fixing means of a to-be-engaged member. The top view of a power transmission means. (A) is a top view of a power transmission means, (B) is an enlarged perspective view of a gear. Explanatory drawing which shows the principle of PG adjustment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inkjet printer, 2 paper feeder, 3 recording means, 4 recording medium conveyance means, 5 recording medium discharge means, 7 tray guide, 11 hopper, 12 feeding roller, 13 retard roller, 14 paper return lever, 23 main Frame, 24 on paper guide, 25 coil spring, 26 guide roller, 30 transport drive roller, 31 transport driven roller,
33 carriage, 34 carriage guide shaft, 34a shaft end, 35 ink cartridge, 36 recording head, 37 platen, 41 discharge drive roller, 42 discharge driven roller, 43 guide roller, 45 discharge frame assembly, 50 tray, 51 gap adjusting means , 52 drive motor, 54 pinion gear, 55-63 gear, 64 gear (engaged member), 64a engaged portion, 64b phase determination pin, 65 gear, 66 gear, 67 power transmission means, 68 tooth wheel train, 70 cover, 71 fitting hole, 74 hole, 75 long hole, 76 gap adjustment cam, 77 fixing pin, D optical disk, P recording paper

Claims (7)

A carriage that supports a recording head for recording on a recording medium and reciprocates in the main scanning direction;
A carriage guide shaft for guiding the carriage in the main scanning direction;
A gap adjusting means for adjusting a gap between a recording medium and the recording head by displacing a position of an axis of the carriage guide shaft;
The gap adjusting means is configured to displace the axis position of the carriage guide shaft by rotating the carriage guide shaft,
A drive motor for rotating the carriage guide shaft;
By receiving a trigger from the carriage, it is possible to switch between a power transmission state in which power is transmitted from the drive motor to the carriage guide shaft and a power cut state in which power is not transmitted from the drive motor to the carriage guide shaft. Power transmission means,
The engaged member that receives a trigger from the carriage in the power transmission means is disposed on the end side close to the home position in the movement region of the carriage.
A recording apparatus. 2. The carriage carriage according to claim 1, wherein a tray transport path capable of transporting a tray on which a thin plate-like body as a recording medium can be transported is located at a position where the engaged member is disposed in the carriage movement region. In preparation for the position across the position,
A recording apparatus. A carriage that supports a recording head for recording on a recording medium and reciprocates in the main scanning direction;
A carriage guide shaft for guiding the carriage in the main scanning direction;
A gap adjusting means for adjusting a gap between a recording medium and the recording head by displacing a position of an axis of the carriage guide shaft;
The recording apparatus includes a tray conveyance path capable of conveying a tray on which a thin plate-like body as a recording medium can be set, and is configured to be able to perform recording on the thin plate-like body set on the tray by the recording head. ,
The gap adjusting means is configured to displace the axis position of the carriage guide shaft by rotating the carriage guide shaft,
A drive motor for rotating the carriage guide shaft;
By receiving a trigger from the carriage, it is possible to switch between a power transmission state in which power is transmitted from the drive motor to the carriage guide shaft and a power cut state in which power is not transmitted from the drive motor to the carriage guide shaft. Power transmission means,
An engaged member that receives a trigger from the carriage in the power transmission means is disposed at a position that sandwiches the home position of the carriage with respect to the tray conveyance path in the movement region of the carriage.
A recording apparatus. In any one of Claims 1-3, the conveyance drive roller rotationally driven by the said drive motor which comprises the conveyance means which conveys a to-be-recorded medium is provided in the upstream of the said recording head,
The power transmission means is configured to receive power from the transport drive roller and transmit power to the carriage guide shaft.
A recording apparatus. In Claim 4, on the upstream side of the conveying means, a rotationally driven feeding roller constituting a feeding means for feeding a recording medium is provided,
The feeding roller is configured to be driven to rotate by receiving power from the transport driving roller,
The power transmission means is configured to receive power from the feeding roller and transmit power to the carriage guide shaft.
A recording apparatus. In any one of Claim 1 to 5, the said power transmission means is comprised including a toothed wheel train,
The engaged member is a spur gear having a rotation axis parallel to the main scanning direction and constituting the toothed wheel train, and the adjacent gear is provided by being slidable in the axial direction of the rotation axis. It is possible to displace the meshing position that meshes with the non-meshing position that does not mesh with the adjacent gear,
A recording apparatus. A carriage that supports a liquid ejecting head that ejects liquid onto an ejected medium and that can reciprocate in the main scanning direction;
A carriage guide shaft for guiding the carriage in the main scanning direction;
A liquid ejecting apparatus comprising: gap adjusting means for adjusting a gap between the ejected medium and the liquid ejecting head by displacing a position of an axis of the carriage guide shaft;
The gap adjusting means is configured to displace the axis position of the carriage guide shaft by rotating the carriage guide shaft,
A drive motor for rotating the carriage guide shaft;
By receiving a trigger from the carriage, it is possible to switch between a power transmission state in which power is transmitted from the drive motor to the carriage guide shaft and a power cut state in which power is not transmitted from the drive motor to the carriage guide shaft. Power transmission means,
The engaged member that receives a trigger from the carriage in the power transmission means is disposed on the end side close to the home position in the movement region of the carriage.
A liquid ejecting apparatus.

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