JP2018188232A - Recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress an avalanche phenomenon such that when a medium is moved between a feed position and a non-feed position retracted from the feed position, a plurality of media contained in the medium cassette shift in a moving direction of the medium cassette.SOLUTION: A medium tray 12 comprises: a pair of edge guides 30 comprising a guide face 31 for guiding a sheet width-directional side edge; and a sheet quantity restriction part 32 comprising a restriction face 32a extending from the guide face 31 in a direction crossing the guide face 31 to restrict the number of sheets contained in the medium tray 12, and is so configured that at least in a predetermined period when the medium tray 12 moves from the feed position toward the non-feed position, an outer peripheral surface of a feed roller 14 is located below the restriction face 32a of the sheet quantity restriction part 32, the sheet quantity restriction part 32 having, on the restriction face 32a, a movement suppression part 33 suppressing sheets container in the medium tray 12 from moving in the moving direction of the medium tray 12.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a recording apparatus that performs recording on a medium fed from a medium tray.

A recording apparatus typified by a printer has a configuration in which a paper cassette that stores a plurality of media is provided in the apparatus body, and the medium that is stored in the paper cassette is transported to a recording area of a recording unit. And in such a recording apparatus, the paper feeding cassette is capable of feeding a medium by feeding means, and a non-feeding position retracted from the feeding position in a direction along the medium conveying direction, (For example, Patent Document 1).

For example, Patent Document 1 includes a lower cassette 16 that accommodates a plurality of media, and an upper cassette 17 that is disposed above the lower cassette 16 at the lower portion of the apparatus main body. And a non-feeding position located on the front side of the apparatus with respect to the feeding position (referred to as a take-out position in Patent Document 1). Is configured to move between. When the upper cassette 17 is in the non-feeding position, the medium can be fed from the lower cassette 16 by the pickup roller 19.

Japanese Patent No. 6069912

Here, in Patent Document 1, when a medium that is close to the maximum number that can be stored in the upper cassette 17 is stored, when the upper cassette 17 moves in the direction along the medium transport direction, Among them, there is a case where an avalanche phenomenon occurs in which the upper medium contacts the pickup roller 19 and the end position of the medium shifts in the direction along the medium transport direction.

  Accordingly, an object of the present invention is a medium cassette that is provided in a recording apparatus and is movable between a feeding position where a medium can be fed by a feeding means and a non-feeding position retracted from the feeding position. An object of the present invention is to suppress the occurrence of an avalanche phenomenon in which a plurality of media accommodated in the medium cassette shift in the moving direction of the medium cassette when the medium cassette is moved.

  In order to solve the above problems, a recording apparatus according to a first aspect of the present invention includes a medium tray that can store a medium on which recording by a recording unit is performed, and the medium in which a feeding roller is stored in the medium tray. An advancing state approaching the side and a retracted state in which the feeding roller is further away from the medium than the advancing state, and the feeding roller contacts the medium in the advancing state, and the medium is transferred to the recording unit. A pair of edge guides provided on the medium tray, each having a guide surface that guides a medium side edge in a width direction intersecting the medium feeding direction, and at least one of the pair of edge guides. A sheet number restricting portion that extends from one of the guide surfaces in a direction intersecting with the guide surface and includes a restricting surface that restricts the number of the media stored in the medium tray. The medium tray is configured to be movable between a feeding position where the medium can be fed by the feeding means and a non-feeding position displaced in a direction along the medium feeding direction from the feeding position. The outer peripheral surface of the feeding roller is below the regulating surface of the number regulating portion (→ just regulating surface) for at least a predetermined period when the medium tray moves from the feeding position toward the non-feeding position. The sheet number restricting portion is a movement suppressing portion that suppresses movement of the medium accommodated in the medium tray in the moving direction of the medium tray on the restricting surface. It is characterized by comprising.

The avalanche phenomenon, which causes contact between the feeding roller and the medium when the medium tray moves between the feeding position and the non-feeding position, is as the number of media stored in the medium tray increases. It is easy to happen.
According to this aspect, since the restriction surface of the number restriction part is provided with the movement suppressing part that suppresses the movement of the medium accommodated in the medium tray in the movement direction of the medium tray, The avalanche phenomenon can be effectively suppressed when a large number of media are stored (for example, when the number of media close to the maximum number of media that can be stored in the media tray is stored).

  According to a second aspect of the present invention, in the first aspect, the movement suppressing portion includes a concavo-convex structure in which a plurality of concavo-convex portions extending in a direction intersecting the moving direction of the medium tray are formed along the moving direction. It is characterized by having.

  According to this aspect, the movement accommodated in the medium tray by the movement suppressing unit having a concavo-convex structure in which a plurality of irregularities extending in the direction intersecting the movement direction of the medium tray is formed along the movement direction. The medium can be restricted from moving in the moving direction of the medium tray.

  According to a third aspect of the present invention, in the first aspect, the movement suppressing portion is formed of a friction member.

  According to this aspect, it is possible to restrict the movement of the medium accommodated in the medium tray in the movement direction of the medium tray by the movement suppressing portion formed by the friction member.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the movement suppressing portion is provided on the downstream side in the medium feeding direction on the restriction surface. Features.

  According to this aspect, since the movement suppressing unit is provided on the downstream side in the medium conveyance direction on the regulation surface, the medium is not limited to the medium size, for example, even when the medium length is short. Undesirable movement can be restricted.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the feeding roller has a normal rotation direction that is a rotation direction that feeds the medium in the medium feeding direction. , And a reverse rotation direction that is a rotation direction that is opposite to the medium feeding direction, and is configured to be rotatable, and when the medium tray is moved, the feeding roller is used to move the medium to the medium tray moving direction. It is made to rotate in the direction which sends it toward.

The avalanche phenomenon that occurs when the medium tray is moved occurs when an upper medium remains on the downstream side in the moving direction of the medium tray among the media stored in the medium tray.
According to this aspect, when the medium tray is moved, the feeding roller is rotated in a direction in which the medium is fed toward the moving direction of the medium tray, so that the avalanche phenomenon can be suppressed.

  According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the medium tray is disposed on the downstream side in the medium feeding direction of the medium accommodated in the medium tray. A regulation unit that regulates movement in the medium feeding direction is provided.

  According to this aspect, the restriction portion can restrict the movement of the medium stored in the medium tray in the medium feeding direction.

  According to a seventh aspect of the present invention, in any one of the first to sixth aspects, a medium that is longer in the medium feeding direction than the medium accommodated in the medium tray is provided below the medium tray. A lower medium tray that can be accommodated, and in a state where the medium tray has moved to the non-feeding position, the feeding means is in the advanced state in contact with the medium accommodated in the lower medium tray; The medium is fed toward the recording unit.

  According to this aspect, in the recording apparatus including the lower medium tray capable of accommodating a medium that is longer in the medium feeding direction than the medium accommodated in the medium tray below the medium tray. The same effect as that of the sixth aspect can be obtained.

FIG. 3 is an external perspective view illustrating an example of a printer according to the invention. FIG. 4 is a side sectional view of the printer according to the present invention, and shows a state where the medium tray is in a non-feeding position. FIG. 3 is a side sectional view of the printer according to the present invention, and shows a state where a medium tray is in a feeding position. FIG. 2 is an enlarged view of a main part of the front surface of the printer according to the present invention. FIG. 3 is a perspective view of a medium tray and a lower medium tray. FIG. 3 is a side cross-sectional view of a main part of the printer according to the invention. The principal part enlarged view of FIG. The principal part expansion perspective view of an edge guide. The perspective view which shows the relationship between a cam shaft and a medium tray. The perspective view which shows the relationship between a cam shaft and a medium tray. The perspective view which shows the relationship between a cam shaft and a medium tray. The perspective view which shows the relationship between a cam shaft and a medium tray. FIG. 10 is a diagram showing the AA cross section and the BB cross section in FIG. 9 in comparison, and is a diagram for explaining state switching of the feeding unit by the medium tray. FIG. 10 is a diagram showing the AA cross section and the BB cross section in FIG. 9 in comparison, and is a diagram for explaining state switching of the feeding unit by the medium tray. FIG. 10 is a diagram showing the AA cross section and the BB cross section in FIG. 9 in comparison, and is a diagram for explaining state switching of the feeding unit by the medium tray. FIG. 10 is a diagram showing the AA cross section and the BB cross section in FIG. 9 in comparison, and is a diagram for explaining state switching of the feeding unit by the medium tray. The graph which shows the relationship between the position of a medium tray and the position of a feed roller. The perspective view which shows the other example of a movement suppression part. The figure explaining the paper feeding operation | movement by a feeding roller. The figure explaining retry operation | movement by a feeding roller. The figure explaining retry operation | movement by a feeding roller. The figure explaining a medium size visual recognition part.

[Example 1]
First, an outline of a recording apparatus according to an embodiment of the present invention will be described. In this embodiment, an ink jet printer (hereinafter simply referred to as a printer) is taken as an example of a recording apparatus.

  FIG. 1 is an external perspective view showing an example of a printer according to the present invention. FIG. 2 is a cross-sectional side view of the printer according to the present invention, showing a state where the medium tray is in the non-feeding position. FIG. 3 is a sectional side view of the printer according to the present invention, and shows a state where the medium tray is in the feeding position. FIG. 4 is an enlarged view of a main part of the front surface of the printer according to the present invention. FIG. 5 is a perspective view of the media tray and the lower media tray. FIG. 6 is a cross-sectional side view of a main part of the printer according to the present invention. FIG. 7 is an enlarged view of a main part of FIG. FIG. 8 is an enlarged perspective view of a main part of the edge guide. FIG. 9 is a perspective view showing the relationship between the cam shaft and the medium tray. FIG. 10 is a perspective view showing the relationship between the cam shaft and the medium tray. FIG. 11 is a perspective view showing the relationship between the cam shaft and the medium tray.

  FIG. 12 is a perspective view showing the relationship between the cam shaft and the medium tray. FIG. 13 is a diagram showing the AA cross section and the BB cross section in FIG. 9 in comparison, and is a diagram for explaining the state switching of the feeding means by the medium tray. FIG. 14 is a diagram showing the AA cross section and the BB cross section in FIG. 9 in comparison, and is a diagram for explaining the state switching of the feeding means by the medium tray. FIG. 15 is a diagram showing the AA cross section and the BB cross section in FIG. 9 in comparison, and is a diagram for explaining the state switching of the feeding means by the medium tray. FIG. 16 is a diagram showing the AA cross section and the BB cross section in FIG. 9 in comparison, and is a diagram for explaining the state switching of the feeding means by the medium tray. FIG. 17 is a graph showing the relationship between the position of the medium tray and the position of the feeding roller. FIG. 18 is a perspective view illustrating another example of the movement suppressing unit. FIG. 19 is a diagram illustrating a sheet feeding operation by the feeding roller. FIG. 20 is a diagram illustrating a retry operation by the feeding roller. FIG. 21 is a diagram illustrating a retry operation by the feeding roller. FIG. 22 is a diagram illustrating the medium size visual recognition unit.

■■■ Overall configuration of the printer ■■■
The overall configuration of the printer 1 will be outlined below.
The printer 1 (FIG. 1) according to the present invention includes a recording head 20 (FIGS. 2 and 3) as a “recording unit” that performs recording on a sheet as an example of a medium in the apparatus main body 2. The printer 1 further includes a scanner unit 3 (FIGS. 2 and 3) that reads an original on the upper part of the apparatus main body 2. In other words, the printer 1 is configured as a multifunction machine having a scanner function in addition to the ink jet recording function.

In the XYZ coordinate system shown in each figure, the X direction is the scanning direction of the recording head, and the Y direction is the apparatus depth direction. The Z direction is the direction of gravity and indicates the device height direction. Further, the + Y direction side is the front side of the apparatus, and the −Y direction side is the back side of the apparatus. Further, the left side when viewed from the front side of the apparatus is the + X direction, and the right side is the −X direction. Further, the + Z direction is the upper side of the apparatus (including the upper and upper surfaces), and the −Z direction side is the lower side of the apparatus (including the lower and lower surfaces).
In the following, the direction in which paper is fed in the printer 1 is referred to as “downstream”, and the opposite direction is referred to as “upstream”.

  1, reference numeral 4 denotes a document table cover 4 (see also FIG. 1) that opens and closes the upper portion of the scanner unit 3 (FIGS. 2 and 3). By opening the document table cover 4, the document of the scanner unit 3 is opened. The upper surface that becomes the base appears.

  Reference numeral 5 on the front side of the apparatus is an operation panel 5 including a power button, an operation button for performing various print settings / recording, a display unit for displaying print setting contents and a print image preview, and the like.

A front cover 9 (FIG. 1) is disposed below the operation panel 5 on the front side of the apparatus main body 2. At the bottom of the apparatus main body 2, a medium tray 12 (FIGS. 2 and 3) that can store paper P 1 on which recording by the recording head 20 is executed, and a lower medium tray 13 (under the medium tray 12) ( 2 and 3) are provided. In the lower medium tray 13, a sheet P <b> 2 that is longer in the medium feeding direction than the sheet P <b> 1 accommodated in the medium tray 12 can be accommodated.
By opening the front cover 9, the medium tray 12 and the lower medium tray 13 accommodated in the tray accommodating portion 23 and a part of the paper discharge receiving tray 8 are exposed. The front cover 9 is attached to the lower medium tray 13 so as to be rotatable (FIG. 5).

  The paper discharge receiving tray 8 is housed in a tray housing part 23 (FIG. 4) of the apparatus main body 2 by a motor (not shown) (FIGS. 2 and 3), and protrudes forward of the apparatus main body 2 (not shown). ), And is in a state of projecting to the front side of the apparatus main body 2, it is possible to receive a recording sheet that is recorded and discharged. When the paper discharge receiving tray 8 protrudes to the front side of the apparatus main body 2, the operation panel 5 is configured to tilt toward the front side of the apparatus with the upper part as an axis.

  A plurality of sheets can be stored in the medium tray 12 and the lower medium tray 13, and each of them can be attached to and detached from the apparatus main body 2 independently. Further, even if one side is not attached, the recording paper can be sent out from the attached tray as long as the other side is attached.

  Reference numeral 6 denotes an openable and closable manual feed cover at the upper rear portion of the apparatus main body 2. By manually opening the manual feed cover 6, the recording paper is manually fed using the manual feed section 7 (FIGS. 2 and 3). Can be done.

■■■ About the paper transport path ■■■
Next, a paper transport path T (shown by dotted lines in FIGS. 2 and 3) in the printer 1 will be described with reference to FIGS.
As described above, the printer 1 includes the medium tray 12 and the lower medium tray 13 at the bottom of the apparatus main body 2.
The medium tray 12 has a feeding position (FIG. 3) at which the sheet can be fed by the feeding means 10 and a non-feeding position displaced in the + Y-axis direction along the medium feeding direction from the feeding position (FIG. 3). 2), and is configured to move between a feeding position and a non-feeding position in response to the power of a motor (not shown) or an external force manually.
FIG. 2 shows a state in which paper is fed from the lower medium tray 13. Further, FIG. 3 shows a state in which paper is fed from the medium tray 12.
The medium tray 12 has a constituent part that is a characteristic part of the present invention. A detailed configuration of the medium tray 12 will be described later.

  2 and 3, a feeding roller 14 (also referred to as a pickup roller) that is rotationally driven by a driving source such as a motor (not shown) is provided above the medium tray 12 and the lower medium tray 13. Means 10 are provided. The feeding unit 10 includes a roller unit 11 that swings around a swinging shaft 11 a, and the feeding roller 14 is rotatably supported on the tip side of the roller unit 11. The swing shaft 11 a is provided in a frame (not shown) in the apparatus main body 2. As an example, two feeding rollers 14 are provided on the front end side of the roller unit 11 with an interval in the apparatus width direction (X-axis direction) (FIG. 9).

  In the feeding means 10, the roller unit 11 swings around the swing shaft 11a, and the feed roller 14 provided at the tip of the roller unit 11 is stored in the medium tray 12 at the feeding position. An advanced state (FIGS. 3 and 16) approaching the P1 side and a retracted state (FIG. 14) in which the feeding roller 14 is further away from the paper P1 than the advanced state are taken. In the advanced state (FIGS. 3 and 16), the feeding roller 14 rotates in contact with the paper P1, and feeds the uppermost paper toward the recording head 20.

  When the medium tray 12 is in the non-feeding position (FIG. 2) and the paper P2 stored in the lower medium tray 13 is fed, the feeding means 10 feeds from the advanced state shown in FIG. The roller 14 swings so as to be positioned further downward. Then, the feeding roller 14 of the feeding unit 10 rotates in contact with the paper P <b> 2 of the lower medium tray 13 and feeds the uppermost paper toward the recording head 20. Note that the state in which the feeding roller 14 (feeding means 10) is in contact with the paper P2 accommodated in the medium tray 12 is also an advanced state as viewed from the retracted state (FIG. 14).

The sheet fed by the feeding roller 14 (feeding means 10) from the medium tray 12 (FIG. 3) or the lower medium tray 13 (FIG. 2) is along the inclined surface 15 on the back side of the apparatus (−Y axis direction side). Sent up.
A reversing roller 17 that is rotationally driven by a motor (not shown) is provided on the downstream side in the medium feeding direction of the feeding roller 14. The reversing roller 17 causes the sheet to be curved and reversed, and the front side of the apparatus (+ Y direction). Head to.

  At the tip of the reversing roller 17, a conveying roller pair 18 that is rotationally driven by a motor (not shown) is provided. The sheet is fed under the recording head 20 by the pair of conveying rollers 18.

  Subsequently, a recording head 20 (recording unit) that discharges ink as liquid onto the paper is provided at the bottom of the carriage 21. The carriage 21 is driven by a motor (not shown) in the main scanning direction (the front and back directions in FIGS. 2 and 3). It is driven so as to reciprocate in the X axis direction).

A medium support member 22 that supports the paper to be conveyed is provided at a position facing the recording head 20, and the medium support member 22 defines an interval (platen gap) between the paper and the recording head 20.
A discharge roller pair 19 that is rotationally driven by a motor (not shown) is provided on the downstream side of the medium support member 22. The sheet on which recording has been performed by the recording head 20 is discharged toward the discharge receiving tray 8 by the discharge roller pair 19.

  The paper fed from the manual feed section 7 (FIGS. 2 and 3) is fed by the manual feed section feed roller 16 and passes through the manual feed path S indicated by a one-dot chain line in FIG. It joins the transport path T on the upstream side.

■■■ About the configuration of the media tray ■■■
Next, the configuration of the medium tray 12 will be described.
As shown in FIG. 5, the medium tray 12 has a pair of edge guides 30 and 30 having a guide surface 31 for guiding a side edge in the width direction (X-axis direction) intersecting the medium feeding direction (see also FIG. 8). ) Is provided. The edge guides 30 and 30 are configured to be movable in a direction approaching each other in the width direction or in a direction away from each other by a moving mechanism (for example, a rack and pinion mechanism) (not shown), and the width size of the paper to be stored The position of the edge guides 30 and 30 can be changed according to the above. The edge guides 30 and 30 shown in FIG. 5 each show a state located on the outermost side in the width direction.

Further, the edge guides 30 and 30 (FIG. 5) are provided with a number restricting portion 32 (see also FIGS. 6 and 7) extending from the guide surface 31 in a direction intersecting the guide surface 31 (Y-axis direction). I have. The sheet number restriction unit 32 includes a restriction surface 32 a (FIG. 8) and restricts the number of sheets P stored in the medium tray 12.
The number restricting unit 32 includes, on the restricting surface 32a, a movement suppressing unit 33 (FIGS. 6 to 8) that suppresses the movement of the paper P1 stored in the medium tray 12 in the moving direction of the medium tray 12. . This movement suppression part 33 is a characteristic part of the present invention. The operation and effect of the movement suppressing unit 33 provided in the number restricting unit 32 will be described below after describing the state switching of the feeding unit 10 by the medium tray 12.

The feeding roller 14 (feeding means 10) is in a position overlapping the edge guides 30 and 30 in the height direction (Z-axis direction) in the advanced state shown in FIG. More specifically, the outer peripheral surface of the feeding roller 14 is the number restricting portion at least for a predetermined period when the medium tray 12 moves from the feeding position (FIG. 3) toward the non-feeding position (FIG. 2). It is the structure located in the lower side from the control surface 32a of 32. The case where the outer peripheral surface of the feeding roller 14 and the position in the height direction of the regulating surface 32a are the same is included.
When the medium tray 12 is attached or detached, the feeding unit 10 is pushed up by a cam mechanism 40 (for example, FIG. 9) described later, and the medium tray 12 and the feeding unit 10 do not collide. Next, the state switching of the feeding unit 10 when the medium tray 12 is attached / detached will be described.

■■■ About the state change of the feeding means by the media tray ■■■
The apparatus main body 2 is provided with a cam mechanism 40 (FIGS. 9 to 12) that enables the state of the feeding unit 10 to be switched by the medium tray 12.
More specifically, in the apparatus main body 2, the cam shaft 41 shown in FIGS. 9 to 12 is provided in the tray accommodating portion 23 (FIG. 4) that accommodates the medium tray 12 and the lower medium tray 13. The cam shaft 41 extends in the same direction as the extending direction (X direction) of the swing shaft 11a, a cam follower portion 42 is provided on one end side, and a cam portion 43 is provided on the other end side. The cam shaft 41 is provided on a frame (not shown), like the above-described swinging shaft 11a.

As shown in FIG. 9, the cam follower portion 42 provided on the cam shaft 41 is provided at a position that can be engaged with the leading end portion 12 a of the medium tray 12. The front end portion 12 a of the medium tray 12 is a front end portion on one side (in the present embodiment, on the −X axis direction side) of both sides in the width direction (X axis direction) of the medium tray 12.
Further, the cam portion 43 provided on the cam shaft 41 is in a position where it can engage with the lever engaging portion 11 b formed inside the hole formed on the side surface of the roller unit 11. That is, the cam portion 43 is inserted into the hole constituting the lever engaging portion 11b.

  Here, FIG. 9 and FIG. 13 which is a cross-sectional view corresponding to FIG. 9 show a state in which the lower medium tray 13 is mounted in the tray accommodating portion 23 (FIG. 4) and the medium tray 12 is in the non-feeding position. (That is, the state as shown in FIG. 2). In this state, as shown in FIG. 13, the cam follower portion 42 is in a state of starting contact with the front end portion 12a of the medium tray 12, but the cam portion 43 does not push up the roller unit 11 (lever engaging portion 11b). The roller unit 11 is in a posture to interfere with the medium tray 12. Further, the feed roller 14 overlaps the edge guides 30 and 30 in the height direction (Z-axis direction).

  When the medium tray 12 moves from this state toward the feeding position (to the right in FIG. 13), the cam follower portion 42 is pushed up to the leading end portion 12a of the medium tray 12 as shown in FIGS. At the same time, it contacts the upper surface of the medium tray 12. At this time, the cam portion 43 pushes up the roller unit 11 (lever engaging portion 11 b), and the roller unit 11 retracts upward from the advance / retreat area of the medium tray 12.

In the state of FIG. 14, the roller unit 11 tends to be lowered by its own weight, but the posture of swinging upward is maintained by these actions of the cam portion 43, the cam shaft 41, and the cam follower portion 42.
When the medium tray 12 further moves from this state toward the feeding position, the state shown in FIG. 15 is obtained.

Here, as shown in FIG. 15, the medium tray 12 has a recess 12b and an inclined surface 12c (see also FIG. 11). When the medium tray 12 moves further from the position shown in FIG. 15 toward the feeding position, as shown in FIGS. 12 and 16, the cam follower portion 42 is guided from the upper surface of the medium tray 12 to the inclined surface 12c and into the recess 12b. Enter. By the cam follower portion 42 entering the recess 12b, the support of the roller unit 11 by the cam portion 43 is released, and the roller unit 11 can swing downward.
12 and 16 show a state where the medium tray 12 is located at a feeding position where the paper P can be fed, that is, the state of FIG. This state is a state in which the feeding roller 14 supported by the roller unit 11 can come into contact with the paper P <b> 2 accommodated in the medium tray 12, and paper feeding from the medium tray 12 is possible.

  Further, in the process in which the medium tray 12 moves from the feeding position (FIGS. 12 and 16) to the non-feeding position, an operation opposite to the operation described above is performed. That is, the cam follower 42 is guided to the upper surface of the medium tray 12 by the inclined surface 12c (from FIG. 11 and FIG. 15 to FIG. 10 and FIG. 14). As a result, the roller unit 11 is pushed up again, the feed roller 14 is separated from the paper P2 accommodated in the medium tray 12, and the medium tray 12 moves to the non-feed position without interfering with the medium tray 12. It becomes possible.

Here, the relationship between the position of the medium tray 12 in the Y-axis direction and the position of the feeding roller 14 in the Z-axis direction will be described with reference to FIG.
In the graph of FIG. 17, the horizontal axis corresponds to the amount of movement of the medium tray 12 in the Y-axis direction, and the vertical axis corresponds to the position of the feeding roller 14 in the Z-axis direction. The broken line in FIG. 17 represents the position (hereinafter referred to as the maximum height) of the uppermost sheet P1 (FIG. 3) when the maximum number of sheets P1 is set on the medium tray 12. In FIG. 17, I represents the position of the medium tray 12 and the feeding roller 14 in the state of FIG. Similarly, II represents the positions of the medium tray 12 and the feeding roller 14 in the state of FIG. Here, III represents the position of the medium tray 12 and the feeding roller 14 in a state where the transition is made from FIG. 14 to FIG. 15, and represents these positions when the feeding roller 14 reaches the maximum height. ing. Further, IV represents the positions of the medium tray 12 and the feeding roller 14 in the state of FIG. V represents the positions of the medium tray 12 and the feeding roller 14 in the state of FIG.

As shown in FIG. 17, in the state I (non-feeding position) and the state V (feeding position), the feeding roller 14 is at a position lower than the maximum height of the paper P1. When the medium tray 12 moves, as shown in FIG. 14, the feeding roller 14 is displaced to a position (for example, a state II) that is out of the medium tray 12 in the Y direction. When the position of the feeding roller 14 is higher than the maximum height of the paper P1, the paper does not come into contact with the paper P1. Further, from the state I (FIG. 13) to the state II (FIG. 14), the feeding roller 14 is still located at a position away from the medium tray 12 in the Y direction. Even if it is at a position lower than the maximum height of the paper P1, it does not come into contact with the paper P1.
However, in the state of III, the feed roller 14 is located at the upper part of the medium tray 12 in the Y direction and is at the maximum height, and thus may contact the paper P1.
Similarly, in the IV and V states, the feed roller 14 is located above the medium tray 12 in the Y direction, and may be in contact with the paper P1 because it is located at a position lower than the maximum height.

That is, when the medium tray 12 is moved in the + Y direction from the state where the medium tray 12 is at the feeding position shown in FIG. 16, in the state from V to III in FIG. The medium tray 12 moves while being in contact with the paper P1.
Then, the uppermost sheet or several sheets on the uppermost side are left pressed by the feeding roller 14, and the edge position of the sheet shifts in the direction along the medium feeding direction (Y-axis direction). A phenomenon may occur.
In the present embodiment, the avalanche phenomenon can be suppressed by the movement suppression unit 33 provided on the regulation surface 32a of the number regulation unit 32 described above.

■■■ Suppression of Avalanche Phenomenon by Movement Control Unit ■■■
Due to the relationship between the position in the Y-axis direction of the medium tray 12 and the position in the Z-axis direction of the feeding roller 14 described with reference to FIG. 17, the avalanche phenomenon is caused by the number of sheets P1 accommodated in the medium tray 12. The more it is, the more likely it is.
The number restricting portion 32 includes the movement suppressing portion 33 on the restricting surface 32a, so that when the sheets P1 are accommodated to the vicinity of the restricting surface 32a, that is, the number of sheets P1 close to the maximum accommodable number in the medium tray 12 is accommodated. In this case, the movement suppressing unit 33 suppresses the movement of the uppermost sheet or the several uppermost sheets of the sheet P1 in the Y-axis direction. Thus, the avalanche phenomenon caused by the contact between the feeding roller 14 and the paper P1 when the medium tray 12 moves between the feeding position and the non-feeding position can be effectively suppressed.

In addition to the case where the avalanche phenomenon occurs when the feeding roller 14 and the paper P1 are in contact with each other, when the medium tray 12 is moved, the uppermost paper remains in the position before the tray movement due to inertia, while the lower side May move with the medium tray 12, and as a result, the end position of the sheet may be shifted in the Y-axis direction. Hereinafter, the avalanche phenomenon that occurs when the feeding roller 14 and the paper P1 come into contact with each other is referred to as a first avalanche phenomenon, and the avalanche phenomenon due to inertia when the medium tray 12 moves is referred to as a second avalanche phenomenon.
By providing the movement suppressing unit 33, the second avalanche phenomenon can also be suppressed.

■■■ About the movement restraint section ■■■
As shown in FIG. 8, the movement suppressing unit 33 has a plurality of projections and depressions extending in the X-axis direction intersecting the Y-axis direction that is the moving direction of the medium tray 12 along the moving direction (Y-axis direction). It has a concavo-convex structure formed. Due to the concavo-convex structure, the movement suppressing portion 33 that suppresses the movement of the paper in the Y-axis direction can be easily configured.

Further, instead of the movement suppressing portion 33 having the concavo-convex structure, a movement suppressing portion 33A (FIG. 18) formed by a friction member may be used. The movement suppressing portion 33A is formed by attaching a high friction member such as rubber to a regulation surface 32a formed of a resin material such as plastic, and also on the surface of the regulation surface 32a formed of a resin material such as plastic. It can also be formed by applying a friction process such as formation of grain or fine irregularities.
In addition, the one where the width | variety (length of an X-axis direction) of the control surface 32a is wider is preferable. Since the restriction surface 32a is wide, the movement suppressing portion 33 can be wide. Accordingly, it is possible to secure a contact area between the movement suppressing unit 33 and the sheet and enhance the sheet movement suppressing effect.

In the present embodiment, the movement suppressing unit 33 is provided on the downstream side (+ Y-axis direction side) in the medium feeding direction on the regulating surface 32a (FIG. 6).
Thus, regardless of the size of the paper P1 accommodated in the medium tray 12, for example, even when the length of the paper P1 is short, undesired movement of the paper P1 can be restricted.

■■■ About the feeding roller ■■■
In the present embodiment, the feeding roller 14 rotates in the forward rotation direction (the + E direction in the double arrow shown in FIG. 13) that is the rotation direction that feeds the paper in the medium feeding direction and the rotation that is opposite to the medium feeding direction. It is comprised so that it can rotate to the reverse rotation direction (-E direction in the double-headed arrow shown in FIG. 13) which is a direction.
In this embodiment, when the medium tray 12 is moved, the feeding roller 14 is configured to rotate in a direction in which the sheet is fed toward the moving direction of the medium tray 12.

In both the first avalanche phenomenon and the second avalanche phenomenon that occur when the medium tray 12 is moved, the leading edge of the uppermost sheet of the paper P1 accommodated in the medium tray 12 is in contact with the medium tray 12. Relatively, the medium tray 12 is shifted to the opposite side of the moving direction.
That is, when the medium tray 12 is moved to the + Y-axis direction side, the leading edge of the uppermost sheet is shifted to the −Y-axis direction side, and when the medium tray 12 is moved to the −Y-axis direction side, The leading edge of the paper is shifted to the + Y axis direction side.
Therefore, when the medium tray 12 is moved, the feeding roller 14 is rotated so as to feed the sheet in the same direction as the movement direction of the medium tray 12, thereby preventing the leading end of the uppermost sheet from being displaced. Can do.

■■■ Other configurations of the printer ■■■
<< Regulating section provided on the downstream side of the media tray >>
The medium tray 12 includes a regulating unit 34 that regulates the movement of the paper P1 stored in the medium tray 12 in the medium feeding direction on the downstream side (−Y axis direction side) in the medium feeding direction. .
Therefore, when the medium tray 12 is moved, the movement of the paper P <b> 1 stored in the medium tray 12 in the −Y axis direction is restricted by the restriction unit 34.

By the way, when the moving speed of the medium tray 12 between the non-feeding position and the feeding position is increased, the above-described second avalanche phenomenon is likely to occur. Therefore, it is also effective to suppress the moving speed of the medium tray 12 in order to suppress the second avalanche phenomenon.
However, in the present embodiment, the restriction portion 34 is provided on the downstream side of the medium tray 12, so that the uppermost sheet among the sheets P <b> 1 stored in the medium tray 12 is on the −Y axis direction side. The risk of movement is reduced. Therefore, when the medium tray 12 is moved in the direction in which the uppermost sheet moves in the −Y-axis direction, that is, the medium tray 12 is moved from the feeding state to the non-feeding state (moving in the + Y-axis direction side). In this case, it is less necessary to reduce the moving speed of the medium tray 12 for the purpose of suppressing the second avalanche phenomenon than when the medium tray 12 is moved in the opposite direction.
Therefore, the moving speed when moving the medium tray 12 to the + Y-axis direction side can be configured to be faster than the moving speed when moving the medium tray 12 to the -Y-axis direction side.

The restricting unit 34 enters the back side (−Y-axis direction) from the inclined surface 15 in a state where the medium tray 12 is positioned at the feeding position (FIG. 3), and the front end of the sheet stored in the medium tray 12 is the inclined surface 15. It will be in the state which can contact | abut.
Further, a regulating portion 35 (FIG. 5) similar to that of the medium tray 12 is provided on the downstream side of the lower medium tray 13.

<< About the drive amount of the feeding roller >>
The drive number at the time of paper feeding by the feeding roller 14 will be described with reference to FIGS.
When a sheet near the upper limit of the number of sheets that can be accommodated is set in the medium tray 12 and the medium tray 12 moves from the non-feeding position (+ Y axis side) to the feeding position (−Y axis side), the upper sheet is caused by the avalanche phenomenon. May shift to the -Y axis side (upper view of FIG. 19). In this state, the uppermost sheet R1 may not be fed to the transportable position H by the reversing roller 17 in one sheet feeding operation by the feeding roller 14 (the lower diagram in FIG. 19). In that case, a second paper feeding operation (retry paper feeding operation) by the feeding roller 14 is performed.
By this retry paper feeding operation, the paper R1 is reliably sent to the transportable position H by the reverse roller 17, as shown in the upper diagram of FIG. Thus, recording can be executed while avoiding paper non-feed.

  Here, the retry paper feeding operation is normally driven with the same driving amount as the first paper feeding operation (the same number of steps when the driving source is a stepping motor). Then, not only the uppermost sheet R1 but also the second sheet R2 from the top may be picked up and sent by the retry sheet feeding operation (upper diagram in FIG. 20). The sheet R1 is transported by the reversing roller 17, but the second sheet R2 from the top remains in the transport path halfway (the middle diagram in FIG. 20).

When the medium tray 12 returns to the feeding position (−Y axis side) in the state of the middle diagram of FIG. 20, the sheet R2 left in the transport path is changed to the lower medium tray 13 as shown in the lower diagram of FIG. 20. The phenomenon of falling on the screen occurs.
If recording is started again while the paper R2 remains in the lower medium tray 13, a paper jam (paper jam error) occurs.

  In order to avoid this problem, the drive amount (number of paper feed steps) of the feed roller 14 during the retry paper feed operation is reduced. Specifically, the drive amount of the feed roller 14 during the retry paper feed operation is set to the minimum necessary drive amount (number of steps) that can reliably feed the paper R1 to the paper feedable position H by the reverse roller 17. (Upper view of FIG. 21). As a result, as shown in the middle diagram of FIG. 21, entry of the second sheet R2 from the top into the transport path is suppressed. Accordingly, as shown in the lower diagram of FIG. 21, when the medium tray 12 returns to the feeding position (−Y axis side), it is possible to suppress the occurrence of the phenomenon that the paper R2 falls on the lower medium tray 13.

<< Regarding Size Size Recognizing Portion of Paper Contained in Lower Media Tray >>
The configuration of the lower medium tray 13 will be described with reference to FIG.
The lower medium tray 13 can accommodate a sheet longer than the sheet accommodated in the medium tray 12. Further, as shown in FIG. 22, the front cover 9 is opened to the front side of the apparatus, and a sheet of a length such that the rear end of the sheet is placed on the opened front cover 9 can be accommodated in the lower medium tray 13. .

Here, the lower medium tray 13 can accommodate sheets of a plurality of sizes as a sheet having a length that the trailing edge of the sheet covers on the opened front cover 9. In this embodiment, there are two sizes, a legal size (215.9 × 355.6 mm) and a folio size (220 × 330 mm). Since the legal size and the folio size are close in length, it is difficult to determine which size the paper accommodated in the lower medium tray 13 is.
Therefore, the front cover 9 is provided with a size visualizing unit 50 of the paper size accommodated in the lower medium tray 13.

  The size visually recognizing part 50 is provided on the front cover 9 so as to slide in the Y-axis direction, and is stored in the front cover 9 as shown in the upper diagram of FIG. 22 and as shown in the lower diagram of FIG. It is configured to be switchable between a protruding state protruding from a slit 52 provided in the front cover 9. A convex portion 51 is provided at the end portion on the −Y-axis direction side of the size visual recognition portion 50, and the convex portion 51 comes into contact with the contact portion 53 (the upper diagram in FIG. 22), so that the size in the protruding state is reached. The position of the visual recognition unit 50 is determined. The size visually recognizing part 50 is switched between a housed state and a protruding state when the user manually operates. The convex portion 51 can also be used as a knob portion when performing state switching.

  The front cover 9 shows a reference position L1 indicating the rear end position of the folio size paper M1 (upper view in FIG. 22). A reference position L2 indicating the rear end position of the legal size paper M2 (the lower diagram in FIG. 22) is shown at the leading end of the size visualizing unit 50 in the projecting direction. A position L2 appears.

With the size visualizing unit 50, it is possible to easily visually recognize which size the paper stored in the lower medium tray 13 is. Further, it can be confirmed that the paper M1 or the paper M2 of each size is appropriately stored.
In FIG. 22, the name of the corresponding paper (for example, Folio for the paper M1, Legal, LGL, etc. for the paper M2) and size are displayed near the lines indicating the reference position L1 and the reference position L2. can do.

  Further, the present invention is not limited to the above-described embodiment, and various modifications are possible within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say.

DESCRIPTION OF SYMBOLS 1 ... Printer (recording device), 2 ... Apparatus main body, 3 ... Scanner unit,
4 ... manuscript cover, 5 ... operation panel, 6 ... manual feed cover,
7 ... manual feed section, 8 ... paper discharge receiving tray, 9 ... front cover, 10 ... feeding means,
11 ... Roller unit, 11a ... Oscillating shaft, 11b ... Lever engaging part,
12 ... Medium tray, 12a ... Tip, 12b ... Recess, 12c ... Slope,
13 ... Lower media tray, 14 ... Feed roller, 15 ... Slope,
16 ... feed roller for manual feed section, 17 ... reversing roller, 18 ... conveying roller pair,
19 ... discharge roller pair, 20 ... recording head, 21 ... carriage,
22 ... Medium support member, 23 ... Tray storage part, 30 ... Edge guide, 31 ... Guide surface,
32: Number restricting part, 32a ... Restricting surface, 33 ... Movement suppressing part, 34 ... Restricting part, 35 ... Restricting part,
40 ... cam mechanism, 41 ... cam shaft, 42 ... cam follower part, 43 ... cam part,
50 ... Size visual recognition part, 51 ... Convex part, 52 ... Slit, 53 ... Deposition part

Claims (7)

A medium tray capable of accommodating a medium on which recording by a recording unit is executed;
The feeding roller takes an advancing state approaching the medium side accommodated in the medium tray and a retreating state in which the feeding roller is separated from the medium than the advancing state, and the feeding roller is in the advancing state. A feeding means for contacting the medium and feeding the medium toward the recording unit;
A pair of edge guides provided on the medium tray, each having a guide surface that guides a medium side edge in the width direction intersecting the medium feeding direction;
A sheet number restricting portion provided with a restricting surface that extends from at least one guide surface of the pair of edge guides in a direction intersecting with the guide surface and restricts the number of the media stored in the medium tray; With
The medium tray is configured to be movable between a feeding position where the medium can be fed by the feeding means and a non-feeding position displaced in a direction along the medium feeding direction from the feeding position. And
The medium tray is configured such that the outer peripheral surface of the feeding roller is positioned below the regulation surface of the sheet number regulating portion for at least a predetermined period when the medium tray moves from the feeding position toward the non-feeding position. ,
The number restricting unit includes a movement suppressing unit that suppresses movement of the medium stored in the medium tray in the moving direction of the medium tray on the restricting surface.
A recording apparatus. The recording apparatus according to claim 1,
The movement suppressing unit has a concavo-convex structure in which a plurality of concavo-convex portions extending in a direction intersecting the moving direction of the medium tray are formed along the moving direction.
A recording apparatus. The recording apparatus according to claim 1,
The movement suppressing portion is formed by a friction member.
A recording apparatus. The recording apparatus according to any one of claims 1 to 3,
The movement suppression unit is provided on the downstream side in the medium feeding direction on the regulation surface.
A recording apparatus. In the recording device according to any one of claims 1 to 4,
The feeding roller is configured to be rotatable in a forward rotation direction that is a rotation direction that sends the medium in the medium feeding direction and a reverse rotation direction that is a rotation direction that is sent in the direction opposite to the medium feeding direction. ,
When the medium tray is moved, the feeding roller is rotated in a direction for feeding the medium toward the moving direction of the medium tray.
A recording apparatus. In the recording device according to any one of claims 1 to 5,
The medium tray includes a regulating unit that regulates movement of the medium stored in the medium tray in the medium feeding direction on the downstream side in the medium feeding direction.
A recording apparatus. The recording apparatus according to any one of claims 1 to 6,
A lower medium tray capable of accommodating a medium longer in the medium feeding direction than a medium accommodated in the medium tray below the medium tray,
In a state where the medium tray is moved to the non-feeding position, the feeding unit takes the advancing state in contact with the medium stored in the lower medium tray, and directs the medium toward the recording unit. It is a configuration to feed,
A recording apparatus.

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