JP5927154B2 - RECORDED MEDIUM CONVEYING DEVICE, RECORDING DEVICE - Google Patents

Description

  The present invention relates to a recording medium transport apparatus for transporting a recording medium, which is provided in a recording apparatus typified by a facsimile or a printer. The present invention also relates to a recording apparatus provided with the recording medium conveying apparatus.

  In a recording apparatus typified by a facsimile or a printer, for example, as disclosed in Patent Document 1, an arcuate path for conveying a sheet so as to be curved and reversed, a linear path for conveying a sheet linearly, and an inclined sheet Some have a plurality of paper transport paths such as a manual feed path that is set in a posture and fed from there. Also, as disclosed in Patent Documents 2 to 4, there is a paper reversing path for reversing the paper in order to perform recording on both sides of the paper.

JP 2007-182316 A JP 2004-315195 A JP 2007-253467 A Japanese Patent No. 3630768

  The arcuate path shown in Patent Document 1 is a path for feeding paper from a paper cassette detachably provided at the bottom of the apparatus to the recording unit, and this arcuate path is provided below the linear path. . The manual feed path is provided above the linear path.

  In the case of providing a sheet reversing path for reversing the sheet in addition to the configuration having a plurality of sheet conveying paths in this way, it is easy to cause an increase in the size of the apparatus on the layout, and thus to prevent the apparatus from becoming large. Requires an appropriate layout of the paper transport path.

  Accordingly, the present invention has been made in view of such a situation, and an object of the present invention is to appropriately arrange a sheet reversing path for reversing a sheet in a sheet conveying apparatus having a plurality of sheet conveying paths. Is to suppress the increase in size.

In order to solve the above problems, a first aspect of the present invention is a carriage guided by a guide shaft extending in a predetermined direction and movable in the predetermined direction, and ink jet recording provided in a lower portion of the carriage. A first conveying path that forms a horizontal conveying path, the head, a lower guide member provided at a position facing the inkjet recording head, and the inkjet recording head facing the lower guide member in the middle of the path. The second transport for joining the first recording medium from the first recording medium storage portion disposed below the first transport path to the first transport path and reversing the curvature of the first recording medium. The first recording medium on which one surface is recorded by the ink jet recording head downward from the path and the first transport path, and before the first transport path Ink-jet recording head joined to said second transport path on the upstream side, and a third conveyance path for bending inverting the first recording medium,
The lower guide member defines a distance between the ink jet recording head and the first recording medium, and when the first transport path side upstream of the ink jet recording head is set as the apparatus rear side, The upstream of the first transport path communicates with the opening at the rear of the apparatus in the horizontal state, forms a part of the opening and an outer surface at the rear of the apparatus, and is engaged with the apparatus. A unit that configures the second transport path and the third transport path so that the recording medium of the recording medium can be transported, and that forms a junction with the second transport path and the third transport path, And when the unit is disengaged from the device, a part of the first transport path that communicates with the opening on the upstream side of the inkjet recording head, a part of the second transport path, and Second transport path Merging portion is exposed between the third conveying path, characterized in that.
According to a second aspect of the present invention, in the first aspect, a second recording medium that is more rigid than the first recording medium is conveyed and recorded on the first conveyance path. And
According to a third aspect of the present invention, in the second aspect, the second recording medium is inserted from the downstream side of the ink jet recording head in the first transport path and recorded by the ink jet recording head. It is characterized by that.
According to a fourth aspect of the present invention, in any one of the first to third aspects, the first recording medium having the one surface recorded by the ink jet recording head is transferred to the first transport path. A flap for guiding to the third transport path is provided.
According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the first merging is performed on the upstream side of the first conveyance path, and the first conveyance path is fed from above. And a fourth transport path for transporting three recording media.
According to a sixth aspect of the present invention, there is provided a first recording medium conveyance path extending between a first side and a second side facing the first side, and the second side to the first side. A recording medium transport comprising: a second recording medium transport path configured to be bent and reversed so as to change the direction to the second side and then merge with the first recording medium transport path. An apparatus that branches from the first recording medium conveyance path to the same side as the second recording medium conveyance path with respect to the first recording medium conveyance path, and is bent and inverted to form the second The third recording medium conveyance path is configured to join in the middle of the recording medium conveyance path.

  According to this aspect, the third recording medium conveyance path for bending and reversing the recording medium branches from the first recording medium conveyance path, and the curve is reversed and halfway along the second recording medium conveyance path. Forms to merge. That is, two conveyance paths (second recording medium conveyance path and third recording medium conveyance path) having a curved inversion path are provided on the same side with respect to the first recording medium conveyance path. In addition, since some route sections are shared, it is possible to suppress an increase in the size of the apparatus.

According to a seventh aspect of the present invention, in the sixth aspect, a path forming member that forms the third recording medium conveyance path is unitized so as to be detachable from the main body of the recording medium conveyance apparatus. It is constructed, and by removing the unitized unit from the apparatus main body, at least a part of the curve reversal section in the second recording medium conveyance path is exposed.

  According to this aspect, by removing the unit that is configured to be detachable from the main body of the recording apparatus and that includes the path forming member that forms the third recording medium conveyance path, the second apparatus can be removed. Since at least a part of the curved reversal section in the recording medium conveyance path of the recording medium is exposed, when a jam occurs in the curved reversal section where a jam is likely to occur, the staying recording medium can be easily removed.

According to an eighth aspect of the present invention, in the sixth or seventh aspect, the second recording medium transport path is opposite to the second recording medium transport path with respect to the first recording medium transport path. According to this aspect, there is provided a fourth recording medium conveyance path that forms a form that obliquely merges with the first recording medium conveyance path. In a recording medium conveying apparatus provided with a recording medium conveying path, it is possible to suppress an increase in size of the apparatus.

According to a ninth aspect of the present invention, in the eighth aspect, the first recording medium conveyance path is a conveyance path extending in a substantially horizontal direction, and the second recording medium conveyance path is the first medium. The traveling direction of the recording medium, which is disposed below the recording medium conveyance path of the recording medium and is sent toward the first side from a first recording medium setting unit that sets the recording medium in a substantially horizontal posture, The third recording medium conveyance path is a conveyance path that reverses the curve so as to face the second side, and the third recording medium conveyance path is disposed below the first recording medium conveyance path, and the first recording medium conveyance The fourth recording medium is a conveyance path that guides the recording medium conveyed toward the first side downward, turns the recording medium in a curved direction, and merges with the second recording medium conveyance path. The medium transport path is a second path for setting the recording medium in an inclined posture. Characterized in that the recording medium set section is a conveying route for combining the recording medium fed toward the second side of said first recording medium conveying path.

  According to this aspect, the first recording medium conveyance path is a conveyance path extending in a substantially horizontal direction, and the second and third recording medium conveyance paths are the first recording medium conveyance. In the recording medium transport apparatus, which is disposed at the lower part of the path, and the fourth recording medium transport path is disposed at the upper part of the first recording medium transport path, the effect of the first aspect is obtained. be able to.

According to a tenth aspect of the present invention, in the ninth aspect, the guide member that forms the first recording medium conveyance path includes a first guide member that forms the second recording medium conveyance path, A second guide member that forms a third recording medium conveyance path and a third guide member that forms the fourth recording medium conveyance path are included.

  According to this aspect, since a part of the first recording medium transport path is formed by the constituent members of the other recording medium transport paths, cost reduction and space saving can be achieved by sharing the constituent members. Can be planned.

According to an eleventh aspect of the present invention, there is provided a recording apparatus for recording on a recording medium, comprising the recording medium conveying apparatus according to any of the sixth to tenth aspects. According to this aspect, in the recording apparatus, it is possible to obtain the same effect as any of the sixth to tenth aspects.

FIG. 3 is a side cross-sectional view schematically showing a paper conveyance path of the printer according to the invention. FIG. 3 is a side cross-sectional view schematically showing a paper conveyance path of the printer according to the invention. FIG. 3 is a side cross-sectional view schematically showing a paper conveyance path of the printer according to the invention. FIG. 3 is a side cross-sectional view schematically showing a paper conveyance path of the printer according to the invention. FIG. 2 is a perspective view of the apparatus main body and the duplex unit of the printer according to the present invention as viewed obliquely from the rear side. The perspective view which looked at the duplex unit from the diagonally rear side. The perspective view which looked at the duplex unit from the diagonally rear side. These perspective views of a path | route switching member (flap), a clutch apparatus, and a deceleration means. Sectional drawing of a clutch apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 4 are side sectional views schematically showing a sheet conveyance path of an ink jet printer 1 which is an embodiment of a recording apparatus according to the present invention. FIG. 5 is an apparatus main body (hereinafter referred to as “printer main body”) of the ink jet printer 1. Say) 1a and a perspective view of the double-sided unit 4 as seen from the oblique rear side, and FIGS. 6 and 7 are perspective views of the double-sided unit 4 as seen from the obliquely rear side.

  8 is a perspective view of the second flap 41, the clutch device 50, and the speed reducing means 58. FIG. 9 is a sectional view of the clutch device 50 (a view cut along a plane parallel to the rotation axis direction of the rotation shaft 42a). is there. 1 to 4 show cross sections of the apparatus, but in order to avoid complication of the drawings, the actual cut surfaces of the constituent members and their hatching are omitted.

  Note that an embodiment of the recording medium transport apparatus according to the present invention includes a first paper transport path R1, a second paper transport path R2, and a third paper transport path R3 described below. The In addition to this, still another embodiment is configured to further include a fourth paper transport path R4 described below.

<< 1. Overall configuration of inkjet printer >>
Hereinafter, the overall configuration of the inkjet printer 1 will be outlined with reference mainly to FIGS. In the following, the right side of FIGS. 1 to 4 is referred to as “device rear side” or “upstream side” or “first side”, and the left side of FIGS. 1 to 4 is referred to as “device front side” or “downstream”. "Side" or "second side".

  The ink jet printer 1 includes three paper feeding units, one of which is a rear feeding unit 2 provided at the upper rear portion of the apparatus, and the other of which is a front feeding unit 3 provided at the front bottom of the apparatus. . The other one is manual feed means for manually feeding from the manual feed port E on the rear side of the apparatus (or from the front side of the apparatus) substantially horizontally.

  The paper P as a recording medium supplied from these paper feeding means is sent to a recording area by the ink jet recording head 33 to perform recording, and toward a stacker (not shown) provided on the front side of the apparatus. Discharged. Alternatively, the conveyance medium (mainly cardboard or the like) supplied from the manual feed port E on the rear side of the apparatus is discharged from the same manual feed port E. Alternatively, in particular, the recording paper P supplied from the rear feeding unit 2 or the front feeding unit 3 and recorded is back-feeded toward the rear side of the apparatus for recording on both sides and reversed by the duplex unit 4. Then, it is sent again to the recording area by the inkjet recording head 33.

  Hereinafter, the components on the paper transport path will be described in more detail. First, the rear feeding unit 2 has a base frame 10 as a base, and a feeding roller 11 that is rotationally driven by a motor (not shown), supports the paper P in an inclined posture, and approaches and separates from the feeding roller 11. And an operable hopper 12 constituting a second recording medium setting section.

  Reference numeral 13 denotes a retard roller provided in a state in which a predetermined rotational resistance is applied. By niping the paper P with the feeding roller 11, the uppermost paper P to be fed and the double feed The next and subsequent sheets P are separated from each other.

  Note that the paper P delivered from the rear feeding unit 2 passes through a fourth paper conveyance path indicated by a broken line and a symbol R4 in FIG. 1 and extends in the horizontal direction from the first side to the second side. To the sheet transport path R1 (FIG. 3) at a position T1. The fourth paper transport path R4 is opposite to the second paper transport path R2 (FIG. 2) and the third paper transport path R3 (FIG. 4) with respect to the first paper transport path R1 (FIG. 3). Is provided on the side (upper side). The base frame 10 constituting the base of the rear feeding unit 2 and the hopper 12 form the fourth paper transport path R4.

  Subsequently, the front feeding unit 3 includes a paper cassette 15 as a first recording medium setting unit, a pick roller 17, a first feeding roller 18 and a driven roller 19, a second feeding roller 20 and a driven roller. 21. A hopper 16 is provided at the bottom of the paper cassette 15, and the hopper 16 is in a rising posture in which the paper P stacked by a driving source (not shown) is pressed against the pick roller 17 and in a falling posture in which the paper P is separated from the pick roller 17. Switch between and.

  The pick roller 17, the first feeding roller 18, and the second feeding roller 20 are rotationally driven by a motor (not shown), and feed the paper P toward the transport driving roller 27 and the transport driven roller 28. To send.

  As described above, the sheet P sent out from the front feeding unit 3 toward the first side (rear side of the apparatus) is changed to the second side (rear side of the apparatus) in FIG. Is bent and reversed through the second sheet conveyance path indicated by (1), and joins the first sheet conveyance path R1 (FIG. 3) at the position T2. Reference numerals G7, G8, G9, and G6 indicate guide members that form the second paper transport path R2.

  Reference numeral 40 denotes a swingable first flap that forms a second paper transport path R2 together with the guide members G7, G8, G9, and G6. The first flap 40 is normally lowered due to its own weight, so that the first flap 40 is in a state of blocking the second paper transport path R2, and the upper surface forms the first paper transport path R1 ( FIG. 3). On the other hand, when the sheet P advances along the second sheet conveyance path R2, the leading edge of the sheet pushes the first flap 40 upward (FIG. 2), thereby opening the second sheet conveyance path R2. It has become.

  In FIG. 2, the symbol R5 indicates the fifth paper transport path. The fifth paper transport path is a transport path through which paper supplied from an optional paper feed section (not shown) provided below the front feed section 3 as necessary, and is apparent from the figure. Then, it joins the second paper transport path R2 and is supplied to the ink jet recording head 33 side.

  Next, the paper P fed from the rear feeding unit 2 and the front feeding unit 3 reaches the conveyance driving roller 27 and the conveyance driven roller 28. The transport driving roller 27 is rotationally driven by a motor (not shown) and precisely feeds the paper P to a region facing the ink jet recording head 33. The transport driven roller 28 is supported by the upper guide member 29 so as to be freely rotatable. The transport driven roller 28 is urged toward the transport driving roller 27 and is driven to rotate while the paper P is pressed against the transport driving roller 28.

  The ink jet recording head 33 is provided at the bottom of the carriage 32, and the carriage 32 is not shown while being guided in the scanning direction of the ink jet recording head 33 (the front and back sides in FIGS. 1 to 4) by a guide shaft (not shown). The motor reciprocates in the scanning direction.

  A lower guide member 31 is provided at a position facing the ink jet recording head 33, and the lower guide member 31 defines a distance between the ink jet recording head 33 and the paper P. An auxiliary roller 36 for preventing the paper P from floating is provided on the downstream side of the ink jet recording head 33, and a discharge driving roller 37 and a discharge driven roller 38 for discharging the recorded paper P are further provided on the downstream side. It has been.

  Next, the paper conveyance path of the inkjet printer 1 will be further described. As described above, the paper P fed from the rear feeding unit 2 is sent to the ink jet recording head 33 side through the fourth paper transport path R4, and the paper P fed from the front feeding unit 3 is The ink is sent to the ink jet recording head 33 side through the second paper transport path R2.

  In addition, a first sheet conveyance path R1 extending linearly in a substantially horizontal direction is formed (FIG. 3). The first paper transport path R1 is a transport path for transporting a transport medium that is highly rigid and difficult to bend, such as thick paper or a tray. When using the first paper transport path R1, a transport medium is inserted from a manual feed port E secured on the rear side of the apparatus, or transport is performed between the discharge drive roller 37 and the discharge driven roller 38 on the front side of the apparatus. Insert the media. The inserted conveyance medium receives a feeding force from the conveyance drive roller 27 or the discharge drive roller 37 and is conveyed in the upstream direction or the downstream direction.

  Further, as shown in FIG. 4, the ink jet printer 1 is branched from the first paper transport path R1 at a position T3 and is bent and reversed to join the second paper transport path R2 (position T4). A third sheet conveyance path R3 is formed. The third paper transport path R3 is fed from the fourth paper transport path R4 (rear feeding unit 2) or the second paper transport path R2 (front feeding unit 3). This is a conveyance path for reversing the sheet in order to perform recording on the back surface (second surface) of the sheet P on which recording has been performed on the surface.

  A second flap 41 is provided at the entrance of the third paper transport path R3, and when the third paper transport path R3 is used, the second flap 41 takes a rising posture as shown in FIG. It is controlled (details will be described later). Therefore, when the paper P recorded on the front surface (first surface) is fed back toward the upstream side, the rear end of the paper on the front surface (first surface) is drawn downward, that is, the first surface. 3 to the paper transport path R3. Then, the sheet P is curved and inverted upward, and is sent again to the recording area by the inkjet recording head 33 with the back surface (second surface) facing up.

<< 2. Double-sided unit configuration >>
Hereinafter, the duplex unit 4 including the third sheet transport path R3 will be described in detail. First, the third paper transport path R3 will be described in further detail with reference to FIG. The third sheet conveyance path R3 is a sheet conveyance path for curving and reversing the sheet P, and includes a guide member and a guide member G7 (which are also components of the front feeding unit 3) denoted by reference numerals G1 to G6, and a second sheet. It is formed by these members of the flap 41, that is, a path forming member. These path forming members are unitized and configured to be detachable from the printer apparatus main body 1a.

  More specifically, the second flap 41 causes the swing shaft 41a to be moved by a motor 49 provided on the double-sided unit 4 side at a branch position T3 from the first paper transport path R1 to the third paper transport path R3. It is provided at the center so as to be driven to swing in the clockwise direction and the counterclockwise direction of FIG.

  The second flap 41 blocks the first paper transport path R1 in the first posture (upward position: FIG. 4) and transports the paper P that has been back-fed through the first paper transport path R1 to the third paper. Guide to route R3. The second flap 41 opens the first paper transport path R1 in the second posture (downward posture: FIG. 3). The power transmission path from the motor 49 to the second flap 41 will be described in detail later.

  In the third paper transport path R3, the first reverse roller 42 and the driven roller 43 in contact therewith, the second reverse roller 44 and the driven roller 45 in contact therewith, the third reverse roller 46 and the driven roller 47 in contact therewith. These three sets of paper transport rollers are provided.

  These rollers of the first reversing roller 42, the second reversing roller 44, and the third reversing roller 46 are provided so as to be driven to rotate by a motor 49, and by rotating these rollers, the paper P is in a third state. The paper can travel along the paper transport path R3 to join the second paper transport path R2.

  The duplex unit 4 having the third sheet transport path R3 configured as described above is configured to be detachable from the printer apparatus main body 1a as shown in FIG. Reference numeral 1b denotes an engaged portion provided in the printer apparatus main body 1a, and reference numeral 62 denotes an engaging protrusion provided in the duplex unit 4. The engaging protrusion 62 is engaged with the engaged portion 1b. Thus, the duplex unit 4 is configured to be locked in the mounted state.

  Reference numeral 61 denotes an operation lever. The lock is released by pulling the operation lever 61 to the rear side of the apparatus. The engaging protrusion 62 and the engaged portion 1b are provided on both sides in the longitudinal direction of the duplex unit 4, but only one side is shown in FIG.

  5-7, the code | symbol 60 has shown the cover which can be rotated centering on the rotation axis which abbreviate | omits illustration. By rotating the cover 60, a curved reversing path of the third paper transport path R3, more specifically, a section from the first reversing roller 42 to the third reversing roller 46 is exposed. Thereby, even if a paper jam occurs in the curved inversion path, the jammed paper P can be easily removed.

  If the duplex unit 4 is removed, the curved reversal section of the second paper transport path R2 is exposed, and even if a paper jam occurs in the second paper transport path R2, the jammed paper P is easily removed. It is possible to do.

  The first paper transport path R1 is formed below the path by the guide member G9, the first flap 40, the second flap 41, and the cover 60 on the upstream side of the transport driving roller 27. The upper guide member 29 and the base frame 10 form the upper side of the path. That is, the first flap 40 and the second flap 41 constituting the double-sided unit 4 have the first sheet transport path R1 together with the constituent members on the printer device main body 1a side when the double-sided unit 4 is mounted on the printer main body 1a. Form.

  By the way, in the present embodiment, the third paper transport path R3 is branched from the first paper transport path R1, curved and reversed, and joins in the middle of the second paper transport path. That is, the two conveyance paths (the second sheet conveyance path R2 and the third sheet conveyance path R3) having the curved inversion path are on the same side (the lower side in the present embodiment) with respect to the first sheet conveyance path R1. And a part of the route section is shared, so that it is possible to suppress an increase in the size of the apparatus.

  In addition, the path constituting member (guide member) that forms the first paper transport path R1 includes a guide member G9 as a first guide member that forms the second paper transport path R2, and a third paper transport path R3. The first flap 40 and the second flap 41 as the second guide member for forming the fourth frame, and the base frame 10 as the third guide member for forming the fourth paper transport path R4. Therefore, cost reduction and space saving are achieved by sharing components.

  In the present embodiment, the upper portion of the duplex unit 4 forms a first paper transport path R1, that is, a straight path, but the fourth paper transport path R4, that is, the paper P fed from the rear feeding unit 2 is used. It can also be configured to form a transport path.

  Next, in the present embodiment, a motor 49 that drives and controls the second flap 41 is provided on the double-sided unit 4 side as described above. Accordingly, even when the reversing unit 4 is detached from the printer apparatus main body 1a (hereinafter referred to as “removed state”), a desired posture can be maintained.

  In other words, if the configuration of the second flap 41 can be easily switched while the duplex unit 4 is removed, the duplex unit 4 is placed in the printer apparatus while the second flap 41 remains in the raised position as shown in FIG. There is a risk of being attached to the main body 1a. At this time, the second flap 41 may interfere with the printer apparatus main body 1a and be damaged.

  However, as described above, even when the duplex unit 4 is detached, the power transmission path from the motor 49 to the second flap 41 is not cut, so the posture of the second flap 41 does not change carelessly, and the desired posture (Descent posture shown in FIG. 6) can be maintained, and damage to the second flap 41 can be avoided.

  For this purpose, the second flap 41 is usually controlled to take a lowered posture (FIG. 6) by a control means (not shown) for controlling the motor 49 (the normal posture of the second flap 41), and the first inversion path R1. It is desirable to control so as to temporarily take the rising posture (FIG. 4) only when the paper P is drawn into the paper.

  It should be noted that when the second flap 41 itself is directly operated in the detached state of the duplex unit 4, such a resistance generating means is a power transmission path from the motor 49 to the second flap 41 and As long as it is provided on the double-sided unit 4 side, the motor 49 may be provided on the printer apparatus main body 1a side.

<< 3. Power transmission path from the motor to the second flap >>
Next, a power transmission path between the motor 49 and the second flap 41 will be described with reference to FIGS. 8 and 9. In the power transmission path, the clutch device 50 as a clutch means for transmitting power from the motor 49 to the second flap 41 by frictional force, and the rotational speed is reduced when the rotation is transmitted from the clutch device 50 to the second flap 41. Deceleration means 58.

  The clutch device 50 is provided at the shaft end of the rotating shaft 42a of the first reversing roller 42. The rotating bodies 51 and 52 as rotating portions, the transmission gear 55 as transmitting portions, clutch members 56a and 56b, And a coil spring 57.

  The rotating bodies 51 and 52 are fixedly provided on the rotating shaft 42a with respect to the rotating direction of the rotating shaft 42a. When the rotating shaft 42a rotates, the rotating bodies 51 and 52 are always rotated. The rotating body 51 is constrained by the stopper portion 42b so as not to move to one side (right direction in FIG. 9) with respect to the rotating axis direction of the rotating shaft 42a. It is provided in an unconstrained state with respect to the rotational axis direction.

  On the other hand, the transmission gear 55 and the clutch members 56a and 56b are provided so as to be non-fixed to the rotation shaft 42a, that is, relatively rotatable with respect to the rotation direction of the rotation shaft 42a. The rotation axis 42a is also provided in an unconstrained state with respect to the rotation axis direction.

  The rotating body 52, the transmission gear 55, and the clutch members 56a and 56b are provided in a state of being pressed toward the rotating body 51 by a coil spring 57 as an urging means. Accordingly, the pressure contact surface between the rotating body 51 and the clutch member 56a, the pressure contact surface between the clutch member 56a and the transmission gear 55, the pressure contact surface between the transmission gear 55 and the clutch member 56b, and the rotation with the clutch member 56b. These pressure contact surfaces between the body 52 and the body 52 are friction surfaces that generate a frictional force. In FIG. 9, reference numeral 53 indicates a flat seat for holding the coil spring 57, and reference numeral 54 indicates a stopper for retaining the flat seat 53 so as not to come off in the left direction of FIG.

  As described above, when the rotating shaft 42a rotates, the rotational torque is transmitted from the rotating body 51 and the rotating body 52 to the transmission gear 55 by the friction surface, and the transmission gear 55 rotates. Since the second flap 41 (swinging shaft 41a) is provided so as to swing only within a predetermined angle range, when the switching of the posture of the second flap 41 is completed, the rotating bodies 51 and 52 are subsequently rotated. Also, the rotation of the transmission gear 55 is stopped.

  As described above, since the clutch device 50 that transmits power from the motor 49 to the second flap 41 by frictional force is provided, it is impossible for the second flap 41 to operate when the second flap 41 itself is directly operated. The posture can be changed (oscillated) without applying a force, and damage to the second flap 41 can be avoided. At the same time, since an unreasonable force is not applied to the power transmission path to the motor 49 side, it is possible to avoid damage to the components of the power transmission path.

  Further, since the clutch device 50 includes the plurality of friction surfaces on the same rotational axis, the friction force per unit area of the friction surface can be set small. More specifically, since sufficient torque can be transmitted from the rotating bodies 51 and 52 to the transmission gear 55 even if the spring force of the coil spring 57 is set to be small, the wear of the members forming the friction surface is reduced and lengthened. Life can be extended.

  Next, the speed reducing means 58 that decelerates the rotation of the transmission gear 58 includes an intermediate gear 59 and a gear 48 provided at the shaft end of the swing shaft 41 a of the second flap 41. The intermediate gear 59 is a gear in which a large gear 59 a and a small gear 59 b are integrally formed. The large gear 59 a meshes with the transmission gear 55, and the small gear 59 b meshes with the gear 48. With the above configuration, the rotation of the transmission gear 58 is decelerated and transmitted to the second flap 41.

  In this manner, since the rotation is decelerated and transmitted from the transmission gear 55 to the second flap 41 via the speed reduction means 58, the members (rotators 51 and 52, transmissions) forming the friction surface in the clutch device 50 are transmitted. The wear of the gear 55 and the clutch members 56a and 56b) can be reduced to extend the life, and the load on the motor 49 can be reduced.

DESCRIPTION OF SYMBOLS 1 Inkjet printer, 2 rear feeding part, 3 front feeding part, 4 duplex unit, 10 base frame, 11 feeding roller, 12 hopper, 13 retard roller, 15 paper cassette, 16 hopper, 17 pick roller, 18 1st Feeding roller, 19 driven roller, 20 second feeding roller, 21 driven roller, 27 transport drive roller, 28 transport driven roller, 29 upper guide member, 31 lower guide member,
32 Carriage, 33 Inkjet recording head, 36 Auxiliary roller, 37 Ejection drive roller, 38 Ejection driven roller, 40 First flap, 41 Second flap, 4
1a oscillating shaft, 42 first reversing roller, 43 driven roller, 44 second reversing roller, 45 driven roller, 46 third reversing roller, 47 driven roller, 48 gear, 4
9 Motor, 50 Clutch device, 51, 52 Rotating body, 53 Flat seat, 54 Stopper, 55 Transmission gear, 56a, 56b Clutch member, 57 Coil spring, 58 Reduction means, 59 Intermediate gear, 60 Cover, 61 Operation lever, 62 Engagement protrusion, E manual feed port, G1-G9 guide member, P recording paper, R1 first paper transport path, R2 second paper transport path, R3 third paper transport path, R4 fourth paper transport Route

Claims (5)

A carriage guided by a guide shaft extending in a predetermined direction and movable in the predetermined direction;
An ink jet recording head provided at a lower portion of the carriage;
A lower guide member provided at a position facing the inkjet recording head;
A first transport path in which the inkjet recording head facing the lower guide member is disposed in the middle of the path and forms a horizontal transport path;
A second conveyance path for joining the first recording medium from the first recording medium storage portion disposed below the first conveyance path to reverse the curve of the first recording medium. When,
One surface of the first recording medium having the one surface recorded by the ink jet recording head is transported downward from the first transport path, and the upstream side of the ink jet recording head in the first transport path A third transport path for joining the second transport path and reversing the curvature of the first recording medium,
The lower guide member defines a distance between the inkjet recording head and the first recording medium;
When the first transport path side upstream from the inkjet recording head is the apparatus rear side, the upstream of the first transport path communicates with the opening at the rear of the apparatus in the horizontal state,
The second transport path and the third transport path are configured so that the first recording medium can be transported by forming a part of the opening and an outer surface behind the apparatus and being engaged with the apparatus. And a unit that constitutes a merge portion between the second transport path and the third transport path,
When the unit is disengaged from the apparatus, a part of the first transport path communicating with the opening on the upstream side of the inkjet recording head, a part of the second transport path, and the first merging portion between the two conveyance paths third conveying path is exposed,
A recording apparatus. 2. The recording apparatus according to claim 1, wherein a second recording medium that is more rigid than the first recording medium is conveyed and recorded on the first conveying path.
A recording apparatus. The recording apparatus according to claim 2, wherein the second recording medium is inserted from the downstream side of the ink jet recording head in the first transport path, and is recorded by the ink jet recording head.
A recording apparatus. 4. The recording apparatus according to claim 1, wherein the first recording medium on which the one surface is recorded by the ink jet recording head is moved from the first transport path to the first recording medium. 3 with a flap for guiding to the transport path of 3,
A recording apparatus. 5. The recording apparatus according to claim 1, wherein the recording apparatus joins on the upstream side of the first transport path and is fed from above the first transport path. A fourth transport path for transporting the recording medium;
A recording apparatus characterized by that.

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