JP2003212357A - Tray for conveying recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a tray capable of obtaining a secure conveying force by a conveying roller while preventing a generation of molding defect such as warping at molding. <P>SOLUTION: A tray 70 which sets an optical disk for directly printing on the optical disk is accurately conveyed under an ink jet recording head while being nipped by a convey driving roller 17 rotated to be driven and a conveying driven roller 17 capable of free rotation. The tray 70 is formed by resin molding and provided, at its surface and back surface, with a plurality of long grooves in a column direction extending in a sub-scanning direction, for preventing warping at molding, by reducing a resin amount. Each of tops of projections formed to the surface and the back surface of the tray 70 by forming the long grooves is flat surface. A contact area between the conveying driving roller 15 and the conveying driven roller 17 is increased, whereby the secure conveying force can be attained. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium (for example, a compact disc) which is not easy to convey using a recording material conveying path in a recording apparatus for recording on a recording medium.
The present invention relates to a recording medium transport tray for setting a recording medium.

[0002]

2. Description of the Related Art In recent years, an inkjet printer for consumer use (hereinafter referred to as "printer") is capable of printing by directly ejecting ink droplets onto an optical disc (hereinafter referred to as "optical disc") represented by a compact disc. Has been developed and is commercially available. In such a printer,
Since an optical disk cannot be transported by itself using the paper transport path of the printer, it is set in a dedicated tray (hereinafter referred to as "transport tray") consisting of a plate-shaped body and then transported. There is.

Such a transport tray is generally integrally formed of a resin material because of its cost advantage. Here, the transport tray is required to have a thickness (for example, 2 mm or more) for setting an optical disc. When a plate-like body having a constant wall thickness is formed by resin molding, Warping and non-uniformity in thickness are likely to occur, and in order to prevent this, it is necessary to form ribs (protrusions) on the tray and reduce the amount of resin.

[0004]

By the way, the carrying tray receives the carrying force of the carrying roller in the printer, and the paper is fed (precision fed) below the recording head. The transport roller is composed of a transport drive roller that is rotationally driven, and a transport driven roller that is rotated by being pressed against the transport drive roller, and nips a transport tray with these two rollers to perform a transport operation.

However, when the above-mentioned ribs are formed on the carrying tray, the contact area between the carrying roller and the tray becomes small, the carrying force of the carrying roller is reduced, and the paper feeding accuracy is reduced. Print quality deteriorates. In particular, when a large number of ribs are formed on the surface that comes into contact with the transport drive roller, the transport drive roller is a roller that is driven to rotate, and thus the transport force is further reduced. On the other hand, however, it is desirable to form a large number of ribs in order to reliably prevent warping during molding.

Therefore, the present invention has been made in view of such a problem, and an object thereof is to obtain a reliable conveying force by a conveying roller while preventing the occurrence of forming defects such as warpage during forming. The purpose is to obtain a tray for transporting a recording medium.

[0007]

In order to solve the above-mentioned problems, the recording medium conveying tray according to claim 1 of the present application does not use a recording medium conveying path in a recording apparatus for recording on a recording medium. A recording medium carrying tray comprising a plate-shaped body which has a recess for setting a recording medium having an easy form and which can be easily carried using the recording medium carrying path, and which extends in the sub-scanning direction, and A plurality of long grooves formed at predetermined intervals in the main scanning direction are formed on both the front surface and the back surface, and a space between the two adjacent long grooves is a flat surface.

According to the first aspect of the present invention, there is provided a tray for conveying a recording medium, which is capable of obtaining a reliable conveying force by the conveying rollers while preventing the occurrence of molding defects such as warpage and uneven thickness dimension. Obtainable. That is, when the transport roller nips and rotates the recording medium transport tray to transport the recording medium transport tray, the front surface and the back surface of the recording medium transport tray are transported by the transport roller. It becomes the roller contact surface for obtaining.

On the other hand, when the recording medium conveying tray is formed by resin molding, it is necessary to form ribs from the viewpoint of preventing warpage during molding, that is, reducing the amount of resin. However, since the rib reduces the roller contact area and reduces the carrying force by the carrying roller, therefore, for example, the carrying driving roller for rotationally driving the carrying roller and the carrying driven roller that is rotated by being pressed against the carrying driving roller. In the case of being composed of a roller, if a large number of the ribs are formed only on the surface that comes into contact with the transport drive roller, a sufficient transport force cannot be obtained, and the paper feeding accuracy may deteriorate.

Therefore, in the recording medium carrying tray according to claim 1 of the present application, not the ribs but the long grooves extending in the sub-scanning direction are formed on both the front surface and the back surface, and a flat surface is formed between two adjacent long grooves. Formed. Therefore, since the resin amount is surely reduced by forming the long grooves on both the front surface and the back surface, and the two adjacent long grooves form a flat surface, a sufficient roller contact area can be obtained. As a result, it is possible to obtain a reliable carrying force by the carrying roller while preventing the occurrence of molding defects such as warpage and uneven thickness dimension.

A recording medium having a form that is difficult to convey using a recording medium conveying path in a recording apparatus for recording on a recording medium is a rectangular printing paper such as an optical disc typified by a compact disc. Unlike the above, it means a recording medium having a shape that is difficult to be positioned in the main scanning direction, or a recording medium having a size such that the conveying means of the recording device cannot perform an appropriate conveying operation because of its small size.

According to a second aspect of the present invention, there is provided a recording medium carrying tray according to the first aspect, wherein the area of the flat surface on the back surface is equal to or larger than the area of the flat surface on the front surface. According to the second aspect of the present invention, since the area of the flat surface on the back surface is equal to or larger than the area of the flat surface on the front surface, the transport drive roller that is rotationally driven comes into contact with the back surface and can freely rotate. When a proper transport driven roller comes into contact with the surface, a reliable transport force can be obtained, and thus high print quality can be more reliably maintained.

According to a third aspect of the present invention, there is provided a recording medium carrying tray according to the first or second aspect, wherein the longitudinal dimension of the long groove is not uniform. According to the invention of claim 3 of the present application, since the widthwise dimension of the long groove is not uniform,
The degree of freedom in arranging the transport driven roller provided in the main scanning direction so that the transport driven roller does not deviate from the flat surface is improved, and the transport driven roller has any arrangement interval. , Can be adjusted to the arrangement interval.

According to a fourth aspect of the present invention, there is provided a recording medium transport tray according to any one of the first to third aspects, in which a transport drive roller which is in pressure contact with the rear surface and is rotationally driven, and a predetermined interval in the main scanning direction. A plurality of conveyance driven rollers which are arranged in contact with each other and are rotated by being pressed against the surface, and the conveyance driven rollers of the conveyance rollers which convey the recording medium conveyance tray are arranged so as not to come off the flat surface. Are arranged.

According to the fourth aspect of the present invention, a plurality of conveying drive rollers are in pressure contact with the back surface and are rotationally driven, and a plurality of conveyance drive rollers are arranged at a predetermined interval in the main scanning direction, and are pressed in contact with the front surface to be driven to rotate. Since the long groove is arranged so that the transport driven roller of the transport roller for transporting the recording medium transport tray, which is composed of a transport driven roller, does not come off the flat surface, recording by the transport driven roller is performed. It is possible to prevent the decrease of the carrying force without reducing the pressing force of the medium carrying tray against the carrying driving roller.

According to a fifth aspect of the present invention, there is provided a recording medium carrying tray according to any one of the first to fourth aspects, wherein the concave portion is formed in conformity with the shape of the recording medium having a disk shape. To do. According to the invention of claim 5 of the present application, since the concave portion is formed in conformity with the shape of the disk-shaped recording medium, recording for printing on such a recording medium, for example, an optical disk typified by a compact disk In the medium transport tray, it is possible to obtain the same effects as the invention described in any one of claims 1 to 4 of the present application.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1. Configuration of inkjet printer 2. Configuration of positioning adapter, mounting portion of the positioning adapter, and recording medium transport tray 3. Means for preventing contact of the first paper ejection driven roller with the optical disc 4. The recording medium transport tray catching means will be described in order.

<1. Configuration of Inkjet Printer> Hereinafter, the configuration of an inkjet printer (hereinafter abbreviated as “printer”) 1 according to an embodiment of the present invention will be outlined with reference to FIGS. 1 to 3. Here, FIG. 1 is an external perspective view of the printer 1, FIG. 2 is a schematic side sectional view of the printer 1 (FIG. 2 is a paper path from the paper feeding device 5 to the second paper discharge roller 27), and FIG. FIG. 3 is a side view (paper path from the first paper ejection driven roller 30 to the adapter 50).

First, the printer 1 is shown in FIG.
As shown in FIG. 1, a paper discharge port 1b is provided on the front side of the printer body 1a.
The sheet discharge stacker 4 is attached to the sheet discharge port 1b with the sheet stack surface 4a (see also FIG. 14) being slightly inclined. A positioning adapter (hereinafter abbreviated as “adapter”) 50, which will be described in detail later, is detachably attached to the paper discharge port 1b, and a recording medium transport tray (hereinafter referred to as “tray”) is attached to the adapter 50. Abbreviation 70 is inserted so that the tray 7
0 is supported by the adapter 50, and the position in the digit direction at the time of paper feeding and paper discharging is regulated. still,
The tray 70 is for setting an optical disc represented by a compact disc, and by setting the optical disc on the tray 70, printing can be directly performed on the label surface of the optical disc.

Next, the paper feeding path (paper carrying path) in the printer 1 will be described with reference to FIGS. As shown in FIG. 2, the printer 1 is located at the rear of the apparatus (see FIG.
A left side of the sheet feeding device 5 is provided with a sheet feeding device 5, and the cut sheet P set in the sheet feeding device 5 in an inclined posture is fed in a direction of an arrow by a feeding roller 13 which is rotationally driven. An ink jet recording head (hereinafter abbreviated as “recording head”) 2 which passes under the sheet feeding device 5 from the feeding path and the rear of the device.
1 and a second feeding path for feeding substantially horizontally (in the direction of the arrow) to the bottom of the apparatus 1 and manually feeding to the lower side of the recording head 21 from the front of the apparatus (on the right side of FIG. 2) in the substantially horizontal (direction of the arrow) And a third feeding path. Here, the first feeding path is for feeding the flexible cut paper sheet P, and the second feeding path is a highly rigid and thick (non-flexible) recording material (for example, The third feeding path is used for feeding the tray 70, which will be described in detail later, for feeding the board. A roll paper holder (not shown) can be attached to and detached from the paper feeding device 5 on the rear side of the device. The roll paper is fed from the roll paper holder and passes through the lower side of the paper feeding device 5 to form the recording head 21.
It is also configured so that it can be delivered to.

The respective components will be outlined below. The sheet feeding device 5 is provided with a hopper 9 formed of a plate-shaped body provided in an inclined posture. The hopper 9 is swingably provided (clockwise and counterclockwise in FIG. 2) around a swing fulcrum 9a provided at the upper portion, and is swung by a cam mechanism (not shown) so that the lower portion is fed. It is arranged to be pressed into contact with and separated from the paper roller 13, and by press contact, the uppermost one of the cut sheets P accumulated on the hopper 9 is fed to the downstream side together with the rotation of the paper feed roller 13. It Paper feed roller 13
Has a substantially D-shape in a side view, is rotationally driven by a drive motor (not shown), and a rubber material is wound around the outer periphery to feed the paper P pressed against the paper feed roller 13 without slipping. To do. Further, during precision feeding of the recording material by the transport roller 19 provided on the downstream side, drive control is performed so that the flat surface faces the paper P as shown in the figure so that a transport load (back tension) is not generated.

Next, downstream of the paper feed roller 13, there is provided a transport roller 19 for precisely feeding the recording material in the sub-scanning direction. The transport roller 19 includes a transport drive roller 15 which is rotationally driven by a drive motor (not shown), and a transport driven roller 17 which is pressed against the transport drive roller 15 and is driven to rotate.
It consists of and. The transport drive roller 15 is composed of a shaft body that is long in the main scanning direction (front and back direction of paper in FIG. 2), and has a high friction layer (see FIG. (Not shown),
It is possible to perform a reliable precision feeding operation without causing a slip between the back surface of the recording material (the surface opposite to the printing surface). On the other hand, the transport driven roller 17 is the transport drive roller 1.
5, a plurality of them are arranged in the axial direction (see FIG. 7), and they are rotatably supported at the downstream (right side in FIG. 2) end of the transport driven roller holder 18.

The transport driven roller holder 18 has a rotation fulcrum 18
It is provided so as to be rotatable in the clockwise direction and the counterclockwise direction in FIG. 2 around a, and in the direction (clockwise direction in FIG. 2) in which the transport driven roller 17 is pressed against the transport drive roller 15 by an urging means (not shown). It is urged to rotate. Further, the transport driven roller holder 18 can rotate in the direction in which the transport driven roller 17 is separated from the transport driving roller 15 (counterclockwise direction in FIG. 2) by the rotation of the cam 10 (see FIG. 15). It has become. Then, when the recording medium is manually fed in the direction indicated by the arrow and, the conveyance driven roller 17 is separated from the conveyance driving roller 15 by rotating, so that the manual feeding path is opened. It has become. The cam 10 described above (see FIG. 15)
Is configured to be rotated by an operation lever (not shown) operable by a user.

Next, among the plurality of transport driven roller holders 18 arranged in the axial direction of the transport drive roller 15, the one located closest to the 0th digit side (the back side of the paper in FIG. 2) is provided with a slot, A paper detection lever 14 is provided so as to pass through the slot and project downward from above (see also FIG. 15). The paper detection lever 14 is swingable about the upper part, and is pushed upward when the leading edge of the paper P passes, and returns downward when the trailing edge of the paper P passes, whereby a paper not shown The detector detects the swing of the paper detection lever and sends a detection signal to the control unit of the printer 1 (not shown) to detect the passage of the paper P and the size (length) of the recording material. There is. A more detailed structure of the transport driven roller holder 18 will be described later.

Next, a recording head 21 and a platen 25 facing the recording head 21 are provided downstream of the conveying roller 19.
Is provided. The recording head 21 is provided below the carriage 23, is supplied with ink from an ink cartridge 24 mounted on the carriage 23, and ejects ink droplets onto a recording material pressed against a platen 25. The carriage 23 is guided by a main carriage guide shaft 22a and a sub-carriage guide shaft 22b suspended between side frames (not shown) standing upright on the left and right of the apparatus, which constitutes the base of the printer 1, and a carriage motor (not shown). It is configured to reciprocate in the main scanning direction (front and back direction of the paper surface in FIG. 2) by receiving the driving force.

Next, a first paper discharge roller 26 is provided downstream of the recording head 21, and a second paper discharge roller 27 is further provided downstream of the first paper discharge roller 26. The first paper ejection roller 26 and the second paper ejection roller 27 are a first paper ejection drive roller 28 and a second paper ejection drive roller 29 that are rotationally driven by a drive motor (not shown), and rollers that are rotationally driven. It is constituted by a first paper ejection driven roller 30 and a second paper ejection driven roller 31 which are rotated by being elastically brought into contact with the printing paper sheet. The sheet is discharged downstream by being driven to rotate. The first paper ejection driven roller 30 is a toothed roller having teeth on its outer periphery that makes point contact with the printing paper, and the second paper ejection driven roller 3
Reference numeral 1 is a rubber roller that comes into surface contact with the printing paper.

Here, the first paper discharge driven roller 30 and the second paper discharge driven roller 30
A plurality of paper discharge driven rollers 31 are arranged at a predetermined interval in the main scanning direction (see FIG. 11), and these rollers are provided below the paper discharge frame 33 made of a plate-like member elongated in the main scanning direction. It is installed. The discharge frame lower 33 is fixed to the side frames (not shown) standing upright on the left and right of the printer 1 on the left and right, and the release roller (see FIG. 11), which will be described later in detail, sets the downstream side to the upper side with the swing fulcrum. When the first paper discharge driven roller 30 is swung, the first paper discharge driven roller 30 moves to the first paper discharge drive roller 28.
It is possible to have a separation position separated from the contact position and a contact position in contact with the first paper discharge drive roller 28. Then, the first paper discharge driven roller 30 is replaced by the first paper discharge drive roller 28.
By separating from, the feeding path when manually feeding the recording material in the direction indicated by the arrow and is opened,
Further, the first paper output driven roller 30 does not come into contact with the printing surface of the recording material. Incidentally, the printer 1 also has a contact prevention means for preventing the first paper discharge driven roller 30 from coming into contact with the printing surface of the recording material, which will be described later in detail.

The reason why the first paper discharge driven roller 30 does not come into contact with the printing surface of the recording material is as follows. That is, the optical disc carried by the tray 70 has a data storage area immediately below the label surface (printing surface), and therefore, when the first paper ejection driven roller 30 having teeth on the outer circumference is pressed against the label surface, the data storage is performed. This is because the area may be rarely destroyed.

In addition, the second paper discharge driven roller 31 is also driven by the second paper discharge drive roller 2 by a roller up mechanism (not shown).
It is also possible to separate the second recording medium 9 from the recording medium 9 so that the second discharge driven roller 31 does not come into contact with the recording material printing surface. This is because when the recording material is the above-mentioned optical disk, it is difficult for the ejected ink droplets to permeate the label surface and it takes a long time for drying, and when the second paper ejection driven roller 31 comes into contact with such a label surface, it is so-called. This is because there is a risk of white spots and transfer of ink.

Next, referring to FIG.
A paper discharge frame upper portion 35 is provided above. The upper discharge frame 35 is fixed to the left and right side frames (not shown) standing upright on the left and right of the printer 1 similarly to the lower discharge frame 33, and is attached to the left biased position for attaching the adapter 50. A section 37 is provided.
The attachment portion 37 has two fitting holes right 38 and fitting hole left 39 (see FIG. 11) on the left and right, and the fitting provided at the tip of the adapter 50 (on the left side in FIG. 3) into these fitting holes. Convex right 52
By fitting the fitting convex portion left 53 (see also FIG. 10), the adapter 50 can be attached to the paper discharge port 1b. Then, as described above, the tray 70 is inserted into the adapter 50, and the tray 70 is fed from above the adapter 50 and discharged to the adapter 50. The detailed structure of the mounting portion 37 will be described later.

Then, the adapter 50 is attached to the paper discharge port 1b.
The recording material is detachably attached, but the recording material fed from the rear side of the printer 1 (reference numeral in FIG. 2)
Is ejected to the paper ejection stacker 4 which is detachably attached to the paper ejection port 1b like the adapter 50. An unillustrated auto cutter that cuts a cut sheet or roll paper to a predetermined length is detachably attached to the paper ejection port 1b. When the auto cutter is attached, the ejection stacker 4 is attached. Remove from the paper outlet 1b,
It can be attached to the auto cutter. The above is the overall configuration of the printer 1.

<2. Configuration of Positioning Adapter, Mounting Portion, and Recording Medium Conveying Tray> Next, FIGS.
Referring to, the adapter 50, the mounting portion 37, the tray 7
The configuration of 0 will be described in detail. First, the configurations of the adapter 50 and the tray 70 will be described with reference to FIGS. 4 to 9. Here, FIG. 4 shows the adapter 50 and the tray 70.
5 is a front view of the adapter 50, FIG. 6 is a plan view of the back surface of the tray 70, FIG. 7 is a sectional view taken along line xx of FIG. 4, and FIGS. 8 and 9 are sectional views taken along line yy of FIG. is there. 10 is an external perspective view showing a state in which the adapter 50 is removed from the printer 1 and the tray 70 is inserted.

In FIG. 4, the tray 70 is formed by forming a disc accommodating recess 71 on the surface (upper surface) of a tray body 70a made of a plate-like body. Disc storage recess 71
Is a recording material that is not easily fed using the paper feeding path of the printer 1, for example, an optical disc typified by a compact disc, which has a shape difficult to position in the digit direction unlike a rectangular printing paper. A concave portion for accommodating the recording material to be held or a recording material having a size that cannot be flowed in the feeding path of the printer 1 due to its small size,
In this embodiment, a compact disc (hereinafter referred to as “optical disc”) is housed. The tray body 70a is
In the present embodiment, since the plate-shaped body having a size of approximately B5 is used, the sheet feeding path of the printer 1 can be used, and printing can be performed on the label surface of the optical disc set in the disc storage recess 71.

Next, the convex portion 72 formed in the center of the disc accommodating concave portion 71 fits into the hole (not shown) formed in the central portion of the optical disc, so that the set optical disc can be easily moved. Hold it like not. Further, in the disk storage recess 71, which is located on the outer circumference of the disk and is biased to the front side of the printer 1 (lower side in FIG. 4), disk removal holes 73a and 73b are formed. The set optical disk can be taken out by inserting fingers into the disk taking-out holes 73a and 73b. Here, the disc take-out holes 73a and 73b are formed at symmetrical positions as shown in FIG. Therefore, the optical disc set by inserting the right thumb into the left disc removal hole 73a and the optical disc set by inserting the left thumb into the right disc removal hole 73b can be taken out. Can also
The convenience of the user is improved. Further, on the front side of the tray main body 70a (the lower side in FIG. 4), the tray main body 70a
A grip portion 74 protruding upward from a is formed (see also FIG. 1), whereby operability of the user, that is, the tray 70.
It is intended to improve the workability of inserting or withdrawing the printer from the printer 1.

Subsequently, in the tray body 70a, long grooves (portions indicated by diagonal lines in FIG. 4) extending in the sub-scanning direction (vertical direction in FIG. 4) are arranged at predetermined intervals in the digit direction (horizontal direction in FIG. 4). Multiple are formed. In addition, this long groove is shown in FIG.
Further, as shown in FIG. 6, it is formed on both the front surface and the back surface of the tray body 70a. This is for the following reason. That is, in the present embodiment, the tray main body 70a is integrally formed by resin molding from the viewpoint of cost reduction and the like, but in order to secure a sufficient depth of the disk storage recess 71, a constant thickness ( For example, 3 mm) is required. However, when a plate-shaped body having such a thickness is resin-molded, molding defects such as warpage and non-uniformity of the thickness dimension occur at the time of molding, so the amount of resin can be reduced by forming the long groove as described above. As a result, the warpage during molding and the nonuniformity of the thickness dimension are reduced.

The long grooves shown in FIGS. 4 and 6 are also formed from the following viewpoints. That is, the tray body 7
Reference numeral 0a denotes a conveyance driving roller 15 and a conveyance driven roller 17.
Nip (see FIG. 2) and transport drive roller 15
Is conveyed by being rotationally driven. Therefore, the back surface of the tray main body 70a serves as a roller contact surface for obtaining the carrying force by the rotation of the carry driving roller 15. On the other hand, if innumerable ribs are formed on the back surface of the tray body 70a in order to prevent warping or the like during molding of the tray body 70a, the contact area with the transport drive roller 15 is reduced, and the paper feeding accuracy is reduced, and printing is performed. There is also a possibility that the quality will deteriorate. However, in the present embodiment, the tray main body 70a is formed not with ribs but with long grooves extending in the sub-scanning direction on both the front surface and the back surface, and between adjacent two long grooves is a flat surface ( Figure 7
See also). Therefore, by forming the long grooves on both the front surface and the back surface, the amount of resin can be surely reduced, and the two adjacent long grooves form a flat surface, so that a sufficient roller contact area can be obtained. As a result, it is possible to realize reliable transport by the transport drive roller 15 while preventing the occurrence of molding defects such as warpage and uneven thickness dimension.

In this embodiment, many long grooves are not formed on the back surface of the tray body 70a, but are formed so that the front surface and the back surface are substantially equal (see FIG. 7). Therefore, the area of the flat surface on the front surface and the area of the flat surface on the back surface are substantially equal to each other as shown in FIG. 7, and a reliable conveying force by the conveying drive roller 15 can be obtained.

Regarding the long grooves formed on the surface,
The groove width and the arrangement interval are set from the following viewpoints. That is, in FIG. 7, the transport driven roller 17 that is in pressure contact with the surface is shown by an imaginary line. is doing. Therefore, the pressing force of the transport driven roller 17 against the transport drive roller 15 of the tray main body 70a does not decrease, and the tray main body 70a firmly presses the transport drive roller 15 to prevent the reduction of the transport force. ing. Incidentally, in this embodiment, as shown in FIG.
Further, as shown in FIG. 6, the plurality of long grooves arranged in the girder direction are formed so that the widths and the arrangement intervals are not uniform, but they may be arranged so as to be uniform. For uniformity, it is desirable to set the width of the long grooves and the arrangement interval so that the transport driven roller 17 does not come off the flat surface. Also,
In the present embodiment, as shown in FIG. 7, since the opposite side of the long groove is formed as a flat surface and the opposite side of the flat surface is formed as a long groove, there is no portion where the wall thickness is extremely thin. It is intended to prevent warpage or the like due to time or change with time.

Next, referring to FIGS. 4 and 5, the adapter 50 is a support plate 51 for supporting the tray body 70a from below.
And a grip right 55 and a grip left 56 provided on both side ends of the support plate 51, and the insides of the grip right 55 and the grip left 56 are hollow portions into which both side ends of the tray 70 are inserted. ing. A plurality of ribs 57 extending in the sub-scanning direction are formed on the upper surface of the support plate 51 at predetermined intervals in the main scanning direction, thereby reducing the frictional resistance force when the tray 70 slides on the support plate 51. Therefore, it is possible to smoothly execute the paper feeding / discharging operation.

Next, the tray 70 and the adapter 50 can be easily connected to the tray 7 after the tray 70 is inserted into the adapter 50.
It is provided with “falling-off prevention means” that makes it impossible to remove 0 from the adapter 50. More specifically, the drop-out prevention means controls the slide range of the tray 70 in the front-rear direction (vertical direction in FIG. 4) with respect to the adapter 50 after the tray 70 is inserted into the adapter 50.
To prevent the falling off.

That is, on the surface of the tray body 70a,
In the vicinity of the downstream side (lower side in FIG. 4) end, protrusions 75 that project upward are formed as "front side engaging portions" on both side ends of the tray body 70a. On the other hand, on the adapter 50, stopper portions 58 as “first engaging portions” that can be engaged with the protrusions 75 are provided on the upstream side (upper side in FIG. 4) of the adapter 50 and on both side ends of the adapter 50. (See also FIG. 8). Therefore, when the tray 70 is slid in the inserting direction (leftward in FIG. 8) as shown in FIG.
As shown in (B), the protrusion 75 contacts the stopper portion 58,
As a result, the tray 70 becomes the adapter 50 (printer 1).
The slide limit position in the insertion direction with respect to is defined.

On the other hand, as shown in FIG. 6, the tray body 70a
On the upstream side (upper side in FIG. 6) of the back surface of the tray, recesses 76 as "back side engaging portions" are formed on both side ends of the tray body 70a. The concave portion 76 is formed by forming a convex portion 77 on the upstream side of the long groove 81 formed on both end sides on the back surface of the tray main body 70a. On the other hand, on the adapter 50 side, as shown in FIGS. 4 and 9, a protrusion 60 as a “second engaging portion” that can engage with the recess 76.
Is provided at the tip of the elastic piece 59, and the tray body 70
The back surface of a can be elastically contacted. Further, the protrusion 60 is arranged at a position to be fitted into the long groove 81 formed on the back surface of the tray main body 70a, and the tray 70 is fitted in the long groove 81 with the protrusion 60 fitted therein.
Slides with respect to the adapter 50.

The function of the protrusion 60 will be described below.
When the tray 70 is inserted into the adapter 50 as shown in FIG. 9 (A), the projection 60 is recessed as shown in FIG. 9 (B).
Fit in. Here, since the protrusion 60 has the slope 60a that can easily get over the convex portion 77 when the tray 70 is inserted in the inserting direction (leftward in FIG. 9),
When the tray 70 is further inserted, the protrusion 60 becomes the protrusion 77.
Overpass and enter the long groove 81. Next, after the protrusion 60 once enters the long groove 81, the tray 70 is pulled out (see FIG. 9).
Slide in the right direction), the protrusion 77 has a slope 77a so that the protrusion 60 can easily get over it.
The projection 60 rides over the convex portion 77 and enters the concave portion 60.
However, the protrusion 60 and the recessed portion 76 are
When the tray 70 slides in the pulling-out direction in the state of being fitted in, the shape is such that it is caught on the edge of the concave portion 76 (see FIG. 9 (B)), so that the pulling-out direction of the tray 70 (rightward in FIG. 9). ) Is defined.

As described above, the protrusion 75 and the recess 76 formed on the tray 70 side and the stopper portion 58 and the protrusion 60 provided on the adapter 50 side are detached to prevent the tray 70 from detaching from the adapter 50. It constitutes a prevention means. Hereinafter, the function and effect of the dropout prevention means will be described.

The adapter 50 and the tray 70 are, as it were, integrated with each other by the drop-out preventing means. When the tray 70 and the adapter 50 are integrated as described above, the user does not need to perform the two-step operation of mounting the adapter 50 on the printer 1 and then inserting the tray 70 into the adapter 50. That is, when the adapter 50 is attached to the printer 1, the tray 70 is automatically set. Therefore, the workability in manually feeding the sheet by using the tray 70 is improved, and even when the adapter 50 is removed from the printer 1, the adapter 70 is installed. Since the 50 and the tray 70 are integrated, the storability is also improved, and the convenience for the user is improved.

In addition, a mounting portion 37 (see FIG. 1) for mounting the adapter 50 is provided at a position offset to the left side of the printer 1 as shown in FIG. 1, whereby the tray 70 is offset to the left side of the printer 1. Is fed from the position,
Then, the paper is discharged. On the other hand, the paper detection lever 14 described with reference to FIG. 1 is arranged on the right side of the printer 1 (hereinafter appropriately referred to as “0 digit side”), and the tray 70 is manually fed without using the adapter 50. When the paper can be fed, the tray 70 may be inserted from the position where the leading end of the tray 70 contacts the paper detection lever 14, that is, the position on the 0th digit side. In such a case, the paper detection lever 14 may be broken. . But,
As described above, the adapter 50 and the tray 70 are integrated, and when the tray 70 is inserted, it is necessary to attach the adapter 50, so that the feeding position of the tray 70 is set at a fixed position. There is no risk of breaking the lever 14. In addition, it is not necessary to retract the paper detection lever 14 upward when manually feeding the tray 70, and the cost increase of the printer 1 can be suppressed.

Further, returning to FIG. 4, 0 is set in the tray 70.
A guide groove 79 extending in the sub-scanning direction is formed at the side end on the girder side, while a guide rail 61 that extends in the sub-scanning direction and engages with the guide groove 79 on the adapter 50 side (see FIGS. 5 and 7). (See also). And tray 70
Is inserted into the adapter 50, the guide rail 61 enters the guide groove 79, and the tray 70 slides relative to the adapter 50 in the inserted state. Accordingly, the tray 70 can be fed and ejected straight without skewing, and the position in the digit direction during feeding and ejecting can be reliably set to a fixed position, so that an appropriate printing result can be obtained. In addition, the workability is good because it is not necessary to perform alignment in the digit direction when feeding paper. In the present embodiment, a guide groove is provided on the tray 70 side, and the adapter 50
Although the guide rail is provided on the side, the same action and effect can be obtained by providing the guide rail on the tray 50 side and providing the guide groove on the adapter 50 side.

By the way, in FIG. 9, the projection 6 is formed in the recess 76.
When 0 is inserted, the tray 70 can be slid in the inserting direction (leftward in FIG. 9) as described above, but the protrusion 60 is elastically fitted into the recess 76 by the elastic piece 59. Therefore, in the state where the protrusion 60 is fitted in the recessed portion 76, the tray 70 is regulated with a constant force to slide in and out of the tray 70 in the two directions (left and right directions in FIG. 9). The position of is maintained. On the other hand, as shown in FIGS. 3 and 10 (A), a flat surface 63 which is a flat surface orthogonal to the tray 70 inserted into the adapter 50 is formed at the tip of the adapter 50.
When the adapter 50 is removed from the printer 1 as shown in FIG.
Can be made to stand on the mounting surface F in a stable manner. Therefore, the tray 70 for the adapter 50 is thus
By holding the position of and the tray 70 in an upright state, the storage space of the adapter 50 and the tray 70 can be saved, and the storability can be improved also in this respect. There is.

The drop-out preventing means described above is an example, and any structure may be used as long as the tray 70 is slidable with respect to the adapter 50 and does not drop off from the adapter 50. Absent.

Next, referring to FIGS. 11 and 12,
The configuration of the mounting portion 37 for mounting the adapter 50 will be described in detail. Here, FIG. 11A is a plan view of the mounting portion 37, and FIG. 11B is a front view of the mounting portion 37. In addition, FIG. 12 is an explanatory diagram showing a work of attaching the adapter 50 to the attachment portion 37.

In FIG. 11, the mounting portion 37 has two left and right sides.
It has three openings, namely a fitting hole right 38 and a fitting hole left 39. The fitting hole right 38 and the fitting hole left 39 both have a rectangular opening shape, and are formed so as to open in the paper discharge direction at a position visible from the outside in the paper discharge port 1b of the printer 1. Has been done. On the other hand, on both sides of the tip of the adapter 50, a fitting convex portion right 52 and a fitting convex portion left 53 are provided as shown in FIG. 10 (A), FIG. 12 (A), FIG. Therefore, when attaching the adapter 50 to the mounting portion 37, the user holds the grip right 55 and the grip left 56 provided on both sides of the adapter 50 with both hands, and then brings the adapter 50 to the mounting portion 37, and then, If the fitting convex portion right 52 and the fitting convex portion left 53 are inserted into the fitting hole right 38 and the fitting hole left 39 respectively in that direction (FIG. 10 (B)), the adapter 50 is attached to the mounting portion 37.
Can be attached to.

That is, the fitting hole right 38 and the fitting hole left 39
However, as shown in FIG. 1, when the adapter 50 is attached to the printer 1, it is formed at a position visible from the outside in the paper discharge port 1b and opened toward the paper discharge direction. In addition, the user can easily visually recognize the place where the tip of the adapter 50 is inserted, and the adapter 5
0 to the paper outlet 1b and the adapter 50
Since the fitting convex portion right 52 and the fitting convex portion left 53 provided at the tip end of the plug are inserted in the fitting hole right 38 and the fitting hole left 39 in the same direction, when mounting (and removing) Workability is improved. Further, since both side ends of the adapter 50 have a grip portion right 55 and a grip portion left 56, which have grip shapes that are easy to hold by hand, workability when attaching or detaching the adapter 50 is improved. Further, if the mounting portion 37, more specifically, the peripheral portion of the fitting hole right 38 and the fitting hole left 39, and the fitting convex portion right 52 and the fitting convex portion left 53 are made the same color, the distinctiveness is further enhanced. improves.

By the way, in this embodiment, the fitting convex portion right 52 and the fitting convex portion left 53 have substantially the same width dimension,
In addition, the width dimension of the fitting hole left 39 is formed to be slightly larger than the width dimension of the fitting hole right 38, whereby the fitting convex portion right 52 has no gap in the fitting hole right 38. On the other hand, the fitting convex portion left 53 has a clearance when fitted into the fitting hole left 39. As a result, the manufacturing intersection of the parts can be absorbed, the manufacturing cost of the adapter 50 or the mounting portion 37 can be moderated, and the cost of the parts can be reduced, and the position in the girder direction can be fixed by the fitting side without a gap. The position can be reliably set.

In addition, an adapter 50 is provided in the right fitting hole 38.
A detection end 41 and a detection unit 42 for detecting that the right side fitting convex portion 52 is fitted into the right side fitting hole 38 are provided.
One end side of the detection end 41 is swingably held by the detection part 42, and the other end side is projected into the fitting hole right 38, and the fitting convex part right 52 is the fitting hole right 38. When you insert
The detection end 41 swings (clockwise in FIG. 11A), whereby the detection unit 42 sends a detection signal to the control unit (not shown) of the printer 1. Therefore, the control unit (not shown) of the printer 1 is the adapter 50.
Can be recognized as being attached to the main body of the printer 1, and thus, in the state where the adapter 50 is attached, the sheet discharging operation from the rear side of the apparatus (left side in FIG. 2) to the front side of the apparatus (right side in FIG. 2). Therefore, it is possible to prevent the trouble that the paper is caught by the adapter 50 and becomes a paper jam.

In this embodiment, the adapter 50
Is configured as a dedicated component for properly feeding the tray 70, but not only the tray 70 but also printing paper (for example, thin cut paper or thick board paper) on the adapter 50. It is also possible to feed paper from the printer and discharge it onto the adapter 50. In this case, the adapter 50 functions as a paper feed tray and a paper discharge tray that support the printing paper from below, and also has a function of regulating the position in the digit direction during paper feeding.

<3. Means for Preventing Contact of First Discharge Driven Roller with Optical Disc> Next, as described above, since there is a data storage area immediately below the printing surface of the optical disc set on the tray 70, the printer 1 has teeth on the outer periphery. The first paper ejection driven roller 30 has means for preventing the first optical disk driven roller 30 from coming into contact with the optical disk printing surface set on the tray 70. Hereinafter, with reference to FIGS. 13 and 14, a means for preventing such contact of the first paper discharge driven roller 30 with the optical disk printing surface will be described. Here, FIG. 13 is a side sectional view of the paper path from the conveyance driven roller 17 to the second paper ejection driven roller 31, and FIG. 14 is a side view of the paper ejection stacker 4 and the adapter 50.

First, in FIG. 13, the tray 70 is
Is inserted between the second sheet discharge driving roller 29 and the second sheet discharge driven roller 31 toward the upstream side, the tray body 7
The leading end of the sheet 0a comes into contact with the release roller 34 that is axially supported by the lower portion 33 of the paper discharge frame. The release roller 34 is shown in FIG.
As shown in FIG. 1, it is pivotally supported on the 80th digit side (left side of FIG. 11) of the lower discharge frame 33 and on the upstream side (left side of FIG. 13) of the lower discharge frame 33, and as shown in FIG. It is provided so as to project slightly below the first paper discharge driven rollers 30 arranged in the direction. On the other hand, under the paper ejection frame 33
Is provided so as to be swingable around a swing fulcrum (not shown) on the downstream side (the right side in FIG. 13). By swinging, the first paper discharge driven roller 30 is moved relative to the first paper discharge drive roller 28. It is possible to take a separated position and a press contact position. Therefore, when the tray 70 is inserted, the tray main body 70a pushes the release roller 34 upward, swings the lower discharge frame 33, and as shown in FIG.
The paper discharge driven roller 30 is separated from the first paper discharge drive roller 28. That is, when the tray 70 in which the optical disc (indicated by reference numeral Q in FIG. 13) is set is inserted, the first paper ejection driven roller 30 automatically retreats upward without any special operation by the user. This ensures that the first paper discharge driven roller 30 does not come into contact with the optical disk printing surface set on the tray 70.

Second, in FIG. 13, from the tip of the tray body 70a to the end of the optical disc Q (the tray body 7).
The distance to the edge (see FIG. 4) of the concave portion 71 formed in 0a (the distance indicated by the symbol L ₁ in FIG. 13A) is
The tray 70 is configured so as to be larger than the distance from the transport driven roller 17 to the first paper discharge driven roller 30 (the distance indicated by the symbol L ₂ in FIG. 13A) (in other words, the transport driven roller). The distance L ₂ between the paper 17 and the paper discharge driven roller 30 is smaller than the distance L ₁ . This is for the following reasons. That is, when the tray 70 is inserted, the first paper discharge driven roller 30 is moved to the first
The tray 70 is configured to be separated from the sheet discharge drive roller 28 and retract upward, but the tray 70 has a free end (see FIG. 1).
3A), when the front side (right side in FIG. 13) of the tray 70 is displaced downward, the tip of the tray 70 floats up, and the optical disc Q causes the first paper ejection driven roller 30 to move. May come into contact with.

On the other hand, when the tray 70 is manually fed, as described above, the transport driven roller 17 is separated from the transport driving roller 15 by the user's operation and retracted upward, but the tip of the tray 70 is After entering between the conveyance driven roller 17 and the conveyance driving roller 15, the tray 7
The vertical displacement of the 0 leading edge is restricted by these two rollers, and therefore, the tray 70 leading edge does not float upward. That is, the leading end of the tray 70 is the conveyance driven roller 1.
7 and the conveyance drive roller 15 have not reached (Fig. 1
3A), if the optical disc Q does not exist under the first paper ejection driven roller 30, the optical disc Q will hit the first paper ejection driven roller 30 even if the tip of the tray 70 floats up. There is no contact. From this point of view, the distance L ₁ shown in FIG. 13A is configured to be larger than the distance L ₂ , whereby the tip of the tray 70 is lifted upward and the optical disc Q is moved to the first paper ejection driven roller. Thirty
It does not come into contact with.

Thirdly, referring to FIG. 14, the adapter 50
When the printer is attached to the printer 1, the adapter 50 is configured to be supported from below by the paper discharge stacker 4. That is, when the adapter 50 is attached to the printer 1, the adapter 50 (the grip right 55 and the grip left 56 (see FIG. 5)) is placed so that the lower portion of the adapter 50 contacts the stack surface 4a of the paper discharge stacker 4. Since it is formed, the tray 70
The front side (right side in FIG. 14) is not displaced downward, and therefore the tip side of the tray 70 does not float upward, and the contact of the optical disc Q with the first paper ejection driven roller 30 can be prevented more reliably. At the same time, the distance from the recording head 21 (see FIG. 2) is also kept constant, and deterioration of print quality can be prevented.

<4. Hooking Prevention Means for Tray for Transporting Recording Medium> Next, the hooking prevention means for the tray 70 will be described with reference to FIG. 15 and other drawings as appropriate. Here, FIG. 15 is a side view of the transport driven roller holder 18. As shown in FIG. 15, the transport driven roller holder 18 which rotatably supports the transport driven roller 17 has a rotation shaft 18a, and the transport driven roller 17 causes the transport driven roller 17 to move by a biasing means (not shown). It is urged to rotate in the direction of being pressed against. On the other hand, a cam 10 that rotates about a rotation shaft 10a is disposed above the rear portion (on the left side in FIG. 15) of the rotation center 18a, and the rotation of the cam 10 causes the transport driven roller 18 to rotate. The cam surface 18b and the cam surface 18c formed above the roller are pushed down, whereby the transport driven roller holder 18 (the transport driven roller 1
8 ') is rotated against the biasing means, so that the conveyance driven roller 17 (conveyance driven roller 17') is separated from the conveyance driving roller 15. The cam 10 is
A user operates an operation lever (not shown) to rotate the operation lever.

Here, the cam surface 18c shown in phantom in FIG. 15 is most likely to be the most driven follower roller holder (shown in FIG. 15 as 18 ') that pivotally supports the follower roller shown in 17' in FIG. The cam surface of the conveyance driven roller holder (also indicated by reference numeral 18 'in FIG. 15) through which the paper detection lever 14 is provided, which is provided on the 0th digit side, is the cam surface of another conveyance driven roller holder 18 as shown in the drawing. 18
It is set below b. This allows the cam 10
15B, the rotation angle of the transport driven roller holder 18 'becomes smaller than that of the other transport driven roller holders 18 as shown in FIG. 15B. The illustrated transport driven roller has a smaller retracted amount than the other transport driven rollers 17.

Hereinafter, the reason for the above-mentioned configuration will be described. First, when an optical disk is set in the disk storage recess 71 (see FIG. 4) and the optical disk projects upward from the tray body 70a (a step is generated), the paper path is inserted when the tray 70 is inserted into the printer 1. Since there is a risk of being caught by the above-mentioned constituent elements, for example, the bottom portion of the sheet feeding device 5 shown in FIG.
As shown in FIG. 13, when the optical disk is set, the printing surface of the optical disk and the surface of the tray body 70a are set to be substantially flush with each other (see FIG. 13). However, since the tray 70 is formed by integral molding using a resin material in the present embodiment, the tray 70 has a slight flexibility and may warp during molding. Therefore, as a result of this, the optical disk is eventually moved to the tray body 70a.
There is a possibility that a step may be generated by projecting upward from.

Therefore, as shown in FIG. 7, the separation position of the two driven follower rollers 17 ′ located substantially in the center of the disk accommodating recess 71, that is, in the approximate center of the optical disk to be set, is shown in FIG. Other transport driven rollers 1 as shown in
It is configured to be slightly lower than 7. As a result, the set optical disc is pressed down from above by the transport driven roller 17 ', the floating from the tray main body 70a is corrected, the catching when inserting the tray 70 is prevented, and smooth manual feeding can be performed. Since the other transport driven rollers 17 are configured so as to be separated to a position where they do not contact the tray main body 70a, the tray main body 70a is not pressed by the transport driven rollers 17 from above, so that there is no load and smoothness is achieved. Manual feeding is possible.

On the other hand, of the conveyance driven roller holders indicated by the reference numeral 18 'in FIG. 15, the one positioned closest to the 0th digit side is provided with the slot for causing the paper detection lever 14 to project downward as described above. The transport driven roller 1
When 8'rotates, the edge portion 18d of the slot comes into contact with the paper detection lever 14 and pushes the paper detection lever 14 upward. Here, the cam surface of the transport driven roller holder 18 'is set below the cam surface 18b of another transport driven roller holder 18 as indicated by reference numeral 18c for the following reason. That is, the paper detection lever 14
Is rotatably provided around the rotating shaft 14a, and is pushed up by the leading edge of the printing sheet fed from the upstream side (left side in FIG. 15) to detect passage of the leading edge of the printing sheet. It has become like. However, if the paper detection lever 14 rotates at the same time as the conveyance driven roller holder 18 is rotated to retract the conveyance driven roller 17, the passage of the print sheet may be erroneously detected or the print sheet may be erroneously detected. There is a possibility that the timing of detecting the passage of the vehicle may be out of the normal timing. Therefore, the cam surface 18c that is pushed down by the cam 10 is set lower than the other cam surface b, and the rotation angle of the transport driven roller holder 18 'is made small so that the paper detection lever 14 is not pushed up. is doing.

[0066]

As described above, according to the present invention, long grooves extending in the sub-scanning direction are formed on the front surface and the back surface of the recording medium transport tray, and the space between two adjacent long grooves is flat. Since it is formed so as to have a surface, it is possible to obtain a reliable carrying force by the carrying roller while preventing the occurrence of molding defects such as warpage and uneven thickness dimension.

[Brief description of drawings]

FIG. 1 is an external perspective view of an inkjet printer according to the present invention.

FIG. 2 is a schematic side sectional view of an inkjet printer according to the present invention.

FIG. 3 is a side view of a positioning adapter.

FIG. 4 is a plan view of a positioning adapter and a recording medium transport tray.

FIG. 5 is a front view of a positioning adapter.

FIG. 6 is a plan view of the back surface of the recording medium transport tray.

7 is a sectional view taken along line xx of FIG.

8 is a sectional view taken along line yy of FIG.

9 is a cross-sectional view taken along line yy of FIG.

FIG. 10 is an external perspective view of a positioning adapter.

11A is a plan view of a mounting portion for mounting a positioning adapter, and FIG. 11B is a front view thereof.

FIG. 12 is an explanatory diagram showing how a positioning adapter is attached.

FIG. 13 is a side sectional view of a paper path from a conveyance driven roller to a second paper discharge driven roller.

FIG. 14 is a side view of a paper output stacker and a positioning adapter.

FIG. 15 is a side view of a transport driven roller holder.

[Explanation of symbols]

1 inkjet printer 1b Paper outlet 4 Paper output stacker 5 Paper feeder 10 cams 10a cam shaft 14 Paper detection lever 15 Transport drive roller 17 Transport driven roller 18 Transport driven roller holder 19 Conveyor roller 21 inkjet recording head 26 First Paper Ejecting Roller 27 Second ejection roller 28 First paper ejection drive roller 29 Second paper ejection drive roller 30 First discharge driven roller 31 Second discharge driven roller 33 Below the paper ejection frame 34 Release Roller 35 On the paper ejection frame 37 Mounting part 38 Mating hole right 39 Mating hole left 50 Positioning adapter 52 Mating convex right 53 Mating convex left 55 grip right 56 Grip left 58 Stopper 59 Elastic piece 60 protrusions 61 Guide rail 63 Flat part 70 Tray for conveying recording medium 70a tray body 71 Disc recess 72 convex 73 Removal hole 74 grip 75 Stopper 76 recess 77 convex 79 Guide groove P printing paper Q optical disc

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroo Nakajima             Seiko, 3-3-3 Yamato, Suwa City, Nagano Prefecture             -In Epson Corporation F-term (reference) 3F343 FA18 FB04 GA01 GB01 GC01                       GD01 HA16 HB07 HC03 HC23                       HC25 HD02 KB02

Claims (5)

[Claims] 1. A recording material conveying path having a concave portion for setting a recording medium having a form which is not easy to convey using a recording material conveying path in a recording apparatus for recording on a recording medium is used. A tray for transporting a recording medium made of a plate-like body that is easy to transport, in which a plurality of long grooves extending in the sub-scanning direction and formed at predetermined intervals over the main scanning direction are formed on both the front surface and the back surface. A tray for recording medium conveyance, wherein a space between the two adjacent long grooves is a flat surface. 2. The recording medium carrying tray according to claim 1, wherein the area of the flat surface on the back surface is equal to or larger than the area of the flat surface on the front surface. 3. The tray for conveying a recording medium according to claim 1, wherein the dimension of the long groove in the width direction is not uniform. 4. The conveyance driving roller according to any one of claims 1 to 3, which is pressed against the back surface and is rotationally driven, and a plurality of conveyance driving rollers are arranged at a predetermined interval in the main scanning direction and are pressed against the front surface and driven. The long groove is arranged so that the transport driven roller of the transport roller configured to transport the recording medium transport tray, which comprises a rotatable transport driven roller, does not come off the flat surface. Tray for recording medium conveyance. 5. The tray for conveying a recording medium according to claim 1, wherein the recess is formed in conformity with the shape of the recording medium having a disk shape.