JP2016172610A - Transport device and printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transport device which inhibits deterioration of transport accuracy even when rollers are connected to form a transport roller, and to provide a printer.SOLUTION: A transport device transports a medium by a transport roller including: rollers 71 (71F, 71S) arranged along a rotation axis direction; and a connection part 72 which connects end parts of the two rollers 71 arranged in the rotation axis direction. The connection part 72 includes: a first bearing 73 which rotatably supports an end part of the first roller 71F; a second bearing 74 which rotatably supports an end part of the second roller 71S; a fixing member 75 to which the bearings 73, 74 are fixed; and a fastening part 76. The fastening part 76 includes: a shaft hole formation member 91 forming a shaft hole 91a into which the end parts of the rollers 71F, 71S may be inserted; and screws 97A, 97B, 98A, 98B which press the end parts of the rollers 71, which are inserted into the shaft hole 91a, from two directions intersecting with each other to fasten the end parts to the shaft hole formation member 91.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a transport apparatus that transports a medium and a printing apparatus including the transport apparatus.

Some printers that are examples of printing apparatuses include a conveyance device that conveys a print medium by a conveyance roller in which a plurality of drive rollers are connected in the axial direction of a drive shaft. In such a transport apparatus, when the width of the medium to be transported increases, it is necessary to increase the length of the transport roller in the width direction accordingly. However, when the length of the transport roller is increased as described above, there is a problem that a manufacturing error increases and the transport accuracy decreases.

Therefore, in order to cope with such a problem, a technique for connecting a plurality of driving rollers in the width direction using an Oldham type coupling has been conventionally proposed (for example, Patent Document 1).

JP 2000-44084 A

By the way, the Oldham type coupling is characterized in that a protrusion is provided on one of the rotating shafts to be connected, a groove is provided on the other, and one protrusion slides on the other along the groove to allow eccentricity. Thus, if the eccentricity can be allowed by the coupling, there is an advantage that the manufacturing error of each driving roller can be allowed accordingly. However, the Oldham type coupling has a problem that due to its structure, the projections and grooves wear with use, resulting in increased backlash and reduced transport accuracy.

Such a problem is not limited to a conveyance device used in a printer, but is generally common in a conveyance device and a printing device including a conveyance roller for conveying a medium.

The present invention has been made in view of such circumstances, and a purpose thereof is a transport apparatus and a printing apparatus that can suppress a decrease in transport accuracy even when a transport roller is configured by connecting a plurality of rollers. Is to provide.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
A transport device that solves the above-described problem transports a medium by a transport roller that includes a plurality of rollers arranged along the rotation axis direction and a connecting portion that connects ends of the two rollers arranged in the rotation axis direction. The transporting device, wherein the connecting portion supports the end portion of the first roller in a rotatable state when the two rollers arranged in the rotation axis direction are respectively a first roller and a second roller. A first bearing that supports the end of the second roller in a rotatable state, a fixing member to which the first bearing and the second bearing are fixed, and the first bearing in the rotational axis direction. A fastening portion that is disposed between one bearing and the second bearing and fastens an end portion of the first roller and an end portion of the second roller; The shaft hole forming member for forming the shaft hole into which the end of the first roller and the end of the second roller can be inserted, and the end of the roller inserted into the shaft hole are pressed from two directions intersecting each other. A fixing member fixed to the shaft hole forming member.

According to this configuration, when the end portions of the two rollers arranged in the rotation axis direction are fastened, the end portions are pressed against the shaft hole forming member from the two directions in which the fixing members intersect with each other. These end portions can be fixed to the shaft hole forming member in a state in which they are moved in one direction.
That is, by positioning the rollers to be connected in one direction, the rotational axis directions of the rollers can be made to coincide with each other. The decrease can be suppressed.

In the transport apparatus, the fixing member includes a first fixing member that presses an end portion of the first roller, and a second fixing member that presses an end portion of the second roller, and the first fixing member. And the second fixing member are arranged side by side in the direction of the rotation axis, and respectively press the end of the first roller and the end of the second roller in the same direction.

According to this configuration, by fixing the end portion of the first roller and the end portion of the second roller with the separate fixing members, even when there is a manufacturing error in the roller, the end portions can be more reliably secured. Adhering to the shaft hole forming member, relative rotation between the roller and the shaft hole forming member can be suppressed. Moreover, also when fixing two rollers with a separate fixing member in this way, the fixing members press the rollers in the same direction, so that the rotation axis directions of adjacent rollers can be made coincident.

In the conveying apparatus, the shaft hole forming member has a cylindrical shape and an inner peripheral surface thereof forms a shaft hole, and the fixing member intersects an end portion of the roller with the rotation axis direction in the shaft hole. A pair of the first member that presses in the first direction and the first member are paired with the end of the roller that is pressed in the first direction in the shaft hole in the rotation axis direction and the first direction. And a second member that presses in a second direction that intersects both.

According to this configuration, after the first member presses the end portion of the roller in the first direction in the shaft hole to press the end portion against the inner peripheral surface of the shaft hole forming member, the second member is positioned. By pressing the end of the roller where the member is positioned in the second direction, the end of the roller can be fixed with high accuracy.

In the conveying apparatus, the fixing member is a screw, the shaft hole forming member is formed in a cylindrical shape, an inner peripheral surface thereof forms a shaft hole, and a screw hole into which the screw can be screwed is formed in the cylindrical portion. The screw that has and is screwed into the screw hole can project into the shaft hole.

According to this configuration, by tightening the screw that is screwed into the screw hole provided in the shaft hole forming member, the screw is protruded into the shaft hole, and the end of the roller inserted into the shaft hole is formed as the shaft hole. It can be fixed so as not to move relative to the member.

A printing apparatus that solves the above problem includes the transport device and a printing unit that performs printing on the medium transported by the transport device.
According to this configuration, the printing unit can accurately print the medium conveyed by the conveyance roller by suppressing the decrease in the conveyance accuracy by the action of the conveyance device.

Sectional drawing which shows typically one Embodiment of a printing apparatus and a conveying apparatus. The front view which shows the structure of a conveying apparatus. The expanded sectional view of the part enclosed with a dashed-dotted line in FIG. Sectional drawing which shows the structure of a fastening part.

Hereinafter, an embodiment of a printing apparatus will be described with reference to the drawings. The printing apparatus is, for example, a large format printer that performs printing (recording) on a long medium.
As illustrated in FIG. 1, the printing apparatus 11 includes a feeding unit 2 that feeds out a medium M wound in a roll shape.
0, a support unit 30 that supports the medium M, a transport device 40 that transports the medium M in the direction indicated by the arrow in FIG. 1, a printing unit 50 that performs printing on the medium M, and the printed medium M is wound up. A winding unit 60.

In the following description, the width direction perpendicular to the longitudinal direction of the medium M (the direction perpendicular to the paper surface in FIG. 1).
1 is a scanning direction X, and a direction in which the medium M is conveyed at a position where the printing unit 50 performs printing is a conveyance direction Y. In the present embodiment, the scanning direction X and the transport direction Y intersect with each other (preferably orthogonal), and both intersect with the gravity direction Z (preferably orthogonal).

As illustrated in FIG. 1, the feeding unit 20 includes a holding unit 22 that holds a roll body 21 in which the medium M is wound in a roll shape. The holding unit 22 can hold a plurality of types of roll bodies 21 having different lengths and winding numbers in the scanning direction X. Then, the feeding unit 20 feeds the medium M from the roll body 21 by rotating the roll body 21 in one direction (counterclockwise in FIG. 1).

The support unit 30 includes a first support unit 31 that forms a transport path for the medium M, a second support unit 32, and a third support unit 33. The first support unit 31 guides the medium M fed from the feeding unit 20 toward the second support unit 32. The second support unit 32 is provided at a position facing the printing unit 50 and supports the medium M on which printing is performed. The third support unit 33 guides the medium M printed by the printing unit 50 toward the winding unit 60.

The printing unit 50 includes a guide shaft 51 extending in the scanning direction X, a carriage 52 supported by the guide shaft 51, and a print head 53 that ejects ink onto the medium M. Carriage 5
2 reciprocates in the scanning direction X along the guide shaft 51 by driving a carriage motor (not shown). The print head 53 is held vertically below the carriage 52 so as to face the medium M supported by the second support portion 32. The printing unit 50 performs a printing operation for forming characters and images on the medium M by ejecting ink from the print head 53 when the carriage 52 moves in the scanning direction X.

The winding unit 60 includes a holding unit 62 that holds a roll body 61 in which the medium M is wound in a roll shape. Then, the winding unit 60 winds the printed medium M by rotating the roll body 61 in one direction (counterclockwise in FIG. 1).

Next, the configuration of the transport device 40 will be described in detail.
The transport device 40 includes a transport roller pair 41 provided between the first support portion 31 and the second support portion 32 in the transport direction Y, and a space between the second support portion 32 and the third support portion 33. A pair of paper discharge rollers 42, and a transport motor 43. In the present embodiment, the rotation axis directions of the transport roller pair 41 and the discharge roller pair 42 are directions along the scanning direction X.

The transport roller pair 41 includes a transport roller 46 disposed on the support base 45 and a support mechanism 47.
The driven roller 48 is supported by a pair, and the medium M is sandwiched between the transport roller 46 and the driven roller 48. Further, the support mechanism 47 includes a biasing member (not shown) that biases the driven roller 48 so as to press the driven roller 48 toward the transport roller 46. The transport roller pair 41 includes a transport roller 46 based on the driving force of the transport motor 43 as shown in FIG.
By rotating in the counterclockwise direction, the sandwiched medium M is transported toward the second support portion 32.

As illustrated in FIG. 2, the transport device 40 includes a plurality of rollers 71 (7
1F, 71S) and at least one connecting portion 72 that connects the ends of the two rollers 71 arranged in the direction of the rotation axis. And the conveyance roller 46 is comprised by the some roller 71 connected by the connection part 72. FIG.

The support mechanism 47 is provided at a position corresponding to the roller 71 along the rotation axis direction, and one support mechanism 47 supports the plurality of driven rollers 48 in a rotatable manner. The driven roller 48 is disposed so as to avoid the connecting portion 72 and presses the medium M toward the roller 71.

In the transport roller 46, when the two rollers 71 aligned in the rotation axis direction are respectively a first roller 71F and a second roller 71S, in the present embodiment, the first roller 71F and the second roller 71S aligned in the rotation axis direction The conveying roller 46 is configured by the connecting portion 72 disposed between the rollers 71F and 71S. In addition, the number of the rollers 71 and the connection part 72 which comprise the conveyance roller 46 can be changed arbitrarily. In addition, among the plurality of rollers 71 constituting the transport roller 46, the end portion where the connecting portions 72 of the rollers 71 located at both ends in the rotation axis direction are not provided is the side wall portion 44 integrated with the support base 45.
Is rotatably supported.

The connecting portion 72 includes a first bearing 73 that supports the end of the first roller 71F in a rotatable state, a second bearing 74 that supports the end of the second roller 71S in a rotatable state,
The fixing member 75 to which the 1st bearing 73 and the 2nd bearing 74 are fixed, the fastening part 76, and the cover member 77 which covers the fastening part 76 are provided. The first bearing 73 and the second bearing 74 are fixed to the fixing member 75 in a state where movement in the rotation axis direction and the direction intersecting the rotation axis direction is restricted. The fastening portion 76 is disposed between the first bearing 73 and the second bearing 74 in the rotation axis direction, and fastens the end portion of the first roller 71F and the end portion of the second roller 71S so as to transmit the rotational force. The cover member 77 covers the fastening portion 76 having an outer diameter smaller than that of the roller 71 so that the medium M does not bend downward in the connecting portion 72.

As shown in FIG. 3, the roller 71 has a cylindrical contact portion 78 that can come into contact with the medium M when transporting the medium M, and has an outer diameter smaller than that of the contact portion 78 and is positioned at both ends in the rotation axis direction. And a pair of shaft portions 79. The first bearing 73 and the second bearing 74 are each a first
It is attached to the first roller 71F and the second roller 71S so that the rotation axis centers C1 and C2 of the contact portion 78 of the roller 71F and the second roller 71S coincide with the rotation axis center. When the bearings 73 and 74 are fixed to the fixing member 75, the first roller 71F and the second roller
The roller 71S is in a state in which the displacement of the portion (contact portion 78) sandwiched between the two bearings 73 and 74 is restricted.

A base end portion on the side of the contact portion 78 in the shaft portion 79 engages with the first bearing 73 or the second bearing 74. Further, the tip portion of the shaft portion 79 engages with the fastening portion 76. In the present embodiment, a small-diameter portion 79b having a smaller outer diameter than the other portions is provided near the center in the rotation axis direction at the tip portion that engages with the fastening portion 76 of the shaft portion 79.

As shown in FIGS. 3 and 4, the fastening portion 76 forms a shaft hole 91a into which the end portion (shaft portion 79) of the first roller 71F and the end portion (shaft portion 79) of the second roller 71S can be inserted. A shaft hole forming member 91 and screws 97 and 98 as fixing members that press the end portions of the rollers 71 from two directions intersecting each other to be fixed to the shaft hole forming member 91 are provided. Shaft hole 91 of shaft hole forming member 91
a has a larger diameter than the outer diameter of the shaft portion 79 of the roller 71. In addition, the screw 97 of the present embodiment
(97A, 97B) and 98 (98A, 98B) are rice screws without a head.

As shown in FIG. 3, the shaft hole forming member 91 has a cylindrical shape and an inner peripheral surface thereof forms a shaft hole 91a, and screws 97 (97A, 97B), 98 (98A, 98B) are formed in the cylindrical portion.
Respectively have screw holes 95 (95A, 95B) and 96 (96A, 96B) that can be screwed together. In the present embodiment, the shaft hole forming member 91 is located at a position corresponding to the small diameter portion 79b in the rotation axis direction.
Screw holes 95 and 96 are provided. The screw hole 95A and the screw hole 96A are aligned in the rotation axis direction, and the screw hole 95B and the screw hole 96B are aligned in the rotation axis direction.

As shown in FIG. 4, the screw holes 95A and 95B are paired so that their axial directions D1 and D2 intersect, and the screw holes 96A and 96B are paired so that their axial directions D1 and D2 intersect. Make. The crossing angle between the axial direction D1 of the screw holes 95A and 96A and the axial direction D2 of the screw holes 95B and 96B is preferably 120 °.

As shown in FIG. 3, the screw 97 (97A, 97B) is a first fixing member that presses the end portion of the first roller 71F, and the screw 98 (98A, 98B) is the end portion of the second roller 71S. It is the 2nd adhering member to press. The screw 97 and the screw 98 are arranged side by side in the rotation axis direction, and the end portion of the first roller 71F and the end portion of the second roller 71S are respectively in the same direction (direction intersecting the rotation axis direction). Press on.

The screw 97A and the second member as the first member that presses the end portion (shaft portion 79) of the first roller 71F.
The screw 97B as a member makes a pair. The tips of the screws 97A and 97B screwed into the screw holes 95A and 95B can protrude into the shaft hole 91a. Therefore, when the screws 97A and 97B are tightened with the end portion of the roller 71F inserted into the shaft hole 91a, the tip protrudes into the shaft hole 91a and abuts against the shaft portion 79 of the roller 71F.
9 is fixed to the shaft hole forming member 91 by being pressed against the inner peripheral surface of the shaft hole forming member 91.

Further, a screw 98A as a first member that presses the end portion (shaft portion 79) of the second roller 71S.
And the screw 98B as the second member make a pair. The tips of the screws 98A and 98B screwed into the screw holes 96A and 96B can project into the shaft hole 91a. Therefore, when the screws 98A and 98B are tightened with the end of the roller 71S inserted into the shaft hole 91a, the tip protrudes into the shaft hole 91a and hits the shaft 79 of the roller 71S.
The shaft portion 79 is fixed to the shaft hole forming member 91 by being pressed against the inner peripheral surface of the shaft hole forming member 91.

As described above, the screws 97A and 98A press the ends (the shaft portion 79) of the rollers 71F and 71S in the shaft hole 91a in the first direction D1 intersecting with the rotation axis direction. Screw 9
7B and 98B are rollers 71F and 71S pressed in the first direction D1 in the shaft hole 91a.
Is pressed in the second direction D2 intersecting both the rotation axis direction and the first direction D1. As a result, the shaft portions 79 of the two rollers 71 are fixed so as not to rotate relative to the shaft hole forming member 91, so that a rotational force is applied from one roller 71 to the other roller 71 via the fastening portion 76. It becomes a state that can be transmitted.

Next, a method for connecting the first roller 71F and the second roller 71S will be described.
First, with the shaft portion 79 of the first roller 71F and the shaft portion 79 of the second roller 71S inserted into the shaft hole 91a of the shaft hole forming member 91, the two screw holes 95A, 96A of the shaft hole forming member 91 are inserted.
Insert screws 97A and 98A into the screws and tighten them lightly. As a result, the tips of the screws 97A and 98A move the shaft portion 79 of the first roller 71F and the shaft portion 79 of the second roller 71S in the first direction D, respectively.
1 to temporarily fix their positions.

Next, screws 97B and 98B are inserted into the two screw holes 95B and 96B of the shaft hole forming member 91 and lightly tightened. Accordingly, the tips of the screws 97B and 98B are connected to the shaft portion 79 of the first roller 71F.
And the shaft part 79 of the 2nd roller 71S is each pressed in the 2nd direction D2, and those positioning is carried out.

Subsequently, by such temporary fixing, the transport roller 46 composed of the connected rollers 71F and 71S is rotated by a predetermined amount in a state in which the relative movement of the shaft portion 79 with respect to the shaft hole forming member 91 is slightly allowed. The rotational axes of 71F and 71S are aligned. When the centers of rotation of the first roller 71F and the second roller 71S coincide with each other by this alignment, first, the screw 97A
, 98A are tightened, and then the screws 97B, 98B are firmly tightened to completely fix the shaft portions 79 of the rollers 71F, 71S to the shaft hole forming member 91.

Next, the operation of the printing apparatus 11 and the transport apparatus 40 configured as described above will be described.
The transport device 40 includes a plurality of rollers 71 arranged along the rotation axis direction, and 2 arranged in the rotation axis direction.
A connecting portion 72 that connects the ends of the two rollers 71, and the medium M is transported by a transport roller 46 that is configured by a plurality of rollers 71 that are connected by the connecting portion 72. That is, the transport roller 46 has a plurality of rollers 71 without increasing the size of a single member even when the width of the medium M to be transported (the length in the scanning direction X that is the rotation axis direction) is increased.
Since the size can be increased (lengthened) by connecting the two, an increase in manufacturing error due to the increase in size is suppressed.

However, when a plurality of rollers 71 are connected, the rollers 71 also include manufacturing errors individually. Therefore, when the rollers 71 are connected in the rotation axis direction, the rotation axis centers C1 and C2 of the individual rollers 71 are shifted. As a result, the conveyance accuracy of the medium M by the conveyance roller 46 is lowered, and there is a possibility that the printing accuracy is lowered.

In that respect, in the transport roller 46 of the present embodiment, the screws 97A and 97B inserted into the two screw holes 95A and 95B whose axial directions intersect with each other protrude into the shaft hole 91a, thereby being inserted into the shaft hole 91a. Further, the shaft portion 79 of the first roller 71F is fixed in a state where it is moved in one direction (downward in FIG. 4). Further, the screws 98A and 98B inserted through the two screw holes 96A and 96B whose axial directions intersect with each other protrude into the shaft hole 91a, so that the shaft portion 79 of the second roller 71S inserted through the shaft hole 91a is moved to the first position. The first roller 71F is fixed in a state where it is moved in the same direction as the shaft portion 79 (downward in FIG. 4).

As a result, as shown in FIG. 4, the rollers 71F and 71S are both brought down to a position shifted downward from the central axis C3 of the cylindrical shaft hole forming member 91, whereby the respective rotational axis centers A
x agrees with each other. The rollers 71F and 71S are fixed to the fixing member 75 in a state in which the rollers 71F and 71S are engaged with the bearings 73 and 74 so that the coincident rotation axis center Ax coincides with the rotation axis center of the bearings 73 and 74. Therefore, the fastening portion 76 has the shaft portion 7 of the first roller 71F in a state where the rotation shaft centers of the bearings 73 and 74 and the center axis C3 of the shaft hole forming member 91 are shifted.
9 and the shaft 79 of the second roller 71S are fastened.

In addition, the fastening portion 76 has one shaft portion 79 formed of two screws (a screw 97A, a screw 97B, and a screw 98.
By pressing with A and the screw 98B), the shaft portion 79 can be more securely fixed to the shaft hole forming member 91 than when pressing with one screw. Thereby, the roller 7
It is possible to convey the medium M with high accuracy by matching the rotation axis of the conveying roller 46 connecting 1F and 71S between the one end side and the other end side.

According to the above embodiment, the following effects can be obtained.
(1) When fastening the end portions of the two rollers 71F and 71S arranged in the rotation axis direction, the end portions are pressed against the shaft hole forming member 91 from two directions where the fixing members (a pair of screws) intersect each other. Therefore, the end portions of the rollers 71F and 71S can be fixed to the shaft hole forming member 91 in a state where the rollers 71F and 71S are moved in one direction. That is, when the rollers 71 to be connected are positioned in a predetermined direction so that the rotation axes of the rollers 71 can coincide with each other, the transport roller 46 is configured by connecting a plurality of rollers 71. In addition, it is possible to suppress a decrease in conveyance accuracy. And by suppressing the fall of a conveyance precision by the effect | action of such a conveying apparatus 40, the printing part 50 can print with high precision with respect to the medium M which the conveyance roller 46 conveys.

(2) By fixing the end portion of the first roller 71F and the end portion of the second roller 71S with separate screws 97 and 98, even if there is a manufacturing error in the roller 71, those ends are more It is possible to reliably adhere to the shaft hole forming member 91 and suppress relative rotation between the roller 71 and the shaft hole forming member 91. Also, when the two rollers 71 are fixed with the separate screws 97 and 98 as described above, the screws 97 and 98 press the roller 71 in the same direction, so that the rotation axis directions of the adjacent rollers 71 coincide with each other. Can be made.

(3) In the shaft hole 91a, the screws 97A and 98A press the end portions of the rollers 71F and 71S in the first direction D1, thereby pressing the end portions against the inner peripheral surface of the shaft hole forming member 91 for positioning. Moreover, after performing this positioning, the edge part of the roller 71 can be accurately fixed by pressing the edge part of the rollers 71F and 71S in which the screws 97B and 98B are positioned in the second direction D2.

(4) By tightening the screws 97 and 98 screwed into the screw holes 95 and 96 provided in the shaft hole forming member 91, the screws 97 and 98 are projected into the shaft hole 91a and inserted into the shaft hole 91a. The end portion of the roller 71 can be fixed so as not to move relative to the shaft hole forming member 91.

In addition, you may change the said embodiment like the example of a change shown below. Moreover, the said embodiment and the following modified example can be combined arbitrarily.
The fixing member is not limited to the screw, and can be changed to any shape as long as the end of the roller 71 can be pressed.

-Conveyance roller 4 comprised by connecting the some roller 71 like the said embodiment.
6 is not limited to the one that conveys the medium M toward the printing unit 50, and may be embodied as a conveyance roller that is disposed at an arbitrary position, such as a conveyance roller that constitutes the discharge roller pair 42, for example. However, since the conveyance roller 46 that conveys the medium M toward the printing unit 50 requires particularly high conveyance accuracy so as not to cause a shift in the printing position, it is preferable to use the conveyance roller 46 of the present embodiment. .

The printing unit 50 may be changed to a so-called full line type printing apparatus that does not include the carriage 52 but includes a long and fixed print head corresponding to the entire width of the medium M. In this case, the print head may be arranged such that a plurality of unit head portions in which nozzles are formed are arranged in parallel so that the print range extends over the entire width of the medium M, or the medium M is formed on a single long head. The printing range may extend over the entire width of the medium M by arranging a large number of nozzles over the entire width.

Recording materials used for printing include fluids other than ink (liquids, liquids in which particles of functional materials are dispersed or mixed, liquids such as gels, and solids that can be jetted as fluids. ). For example, recording is performed by ejecting a liquid material in which a material such as an electrode material or a color material (pixel material) used for manufacturing a liquid crystal display, an EL (electroluminescence) display, and a surface emitting display is dispersed or dissolved. It may be configured.

Further, the printing apparatus is a fluid ejecting apparatus that ejects a fluid such as a gel (for example, a physical gel),
It may be a powder injection device (for example, a toner jet recording device) that injects a solid such as toner (powder particles) as an example. In the present specification, the term “fluid” is a concept that does not include a fluid consisting only of gas. Examples of the fluid include liquids (inorganic solvents, organic solvents, solutions,
Liquid resin, liquid metal (including metal melt), etc., liquid, fluid, and powder (including particles and powder).

The printing apparatus 11 is not limited to a printer that performs recording by ejecting a fluid such as ink, and may be a non-impact printer such as a laser printer, an LED printer, a thermal transfer printer (including a sublimation printer), or a dot impact. An impact printer such as a printer may be used.

The medium is not limited to paper, and may be a plastic film, a thin plate, or the like, or may be a fabric used in a printing apparatus.
The transport device 40 including the transport roller 46 is mounted on the printing device 11, for example, a scanner that reads the transported medium M, a facsimile, a copying device, or a multifunction device including these devices. Also good.

DESCRIPTION OF SYMBOLS 11 ... Printing apparatus, 40 ... Conveyance apparatus, 46 ... Conveyance roller, 50 ... Printing part, 71, 71F
, 71S ... roller, 71F ... first roller, 71S ... second roller, 72 ... connecting part, 7
DESCRIPTION OF SYMBOLS 3 ... 1st bearing, 74 ... 2nd bearing, 75 ... Fixing member, 76 ... Fastening part, 91 ... Shaft hole formation member, 91a ... Shaft hole, 95, 95A, 95B, 96, 96A, 96B ... Screw hole, 9
7 ... Screw as the first fixing member, 98 ... Screw as the second fixing member, 97A, 98A ... Screw as the first member, 97B, 98B ... Screw as the second member, M ... Medium, D1 ... First Direction, D2 ... second direction.

Claims (5)

A transport device that transports a medium by a transport roller including a plurality of rollers aligned along the rotation axis direction and a connecting portion that connects ends of the two rollers aligned in the rotation axis direction,
When the two rollers arranged in the rotation axis direction are the first roller and the second roller, respectively,
A first bearing that supports the end of the first roller in a rotatable state;
A second bearing that supports the end of the second roller in a rotatable state;
A fixing member to which the first bearing and the second bearing are fixed;
A fastening portion that is disposed between the first bearing and the second bearing in the rotation axis direction and fastens the end portion of the first roller and the end portion of the second roller;
With
The fastening portion intersects an end portion of the first roller and an end portion of the second roller, and an end portion of the roller inserted into the end portion of the shaft hole. And a fixing member that is pressed from two directions to be fixed to the shaft hole forming member. The fixing member includes a first fixing member that presses an end portion of the first roller, and a second fixing member that presses an end portion of the second roller,
The first fixing member and the second fixing member are arranged side by side in the direction of the rotation axis, and respectively press the end of the first roller and the end of the second roller in the same direction. The conveying apparatus according to claim 1. The shaft hole forming member has a cylindrical shape and an inner peripheral surface thereof forms a shaft hole,
The fixing member is paired with the first member that presses the end of the roller in a first direction intersecting the rotation axis direction in the shaft hole, and the fixing member forms the pair in the shaft hole. The second member that presses the end of the roller pressed in the first direction in a second direction that intersects both the rotation axis direction and the first direction. Item 3. The transfer device according to Item 2. The fixing member is a screw;
The shaft hole forming member has a cylindrical shape and an inner peripheral surface thereof forms a shaft hole, and has a screw hole into which the screw can be screwed.
The said screw screwed in the said screw hole can protrude in the said shaft hole. The conveying apparatus as described in any one of Claims 1-3 characterized by the above-mentioned. The conveying apparatus as described in any one of Claims 1-4,
A printing unit that performs printing on the medium conveyed by the conveying device;
A printing apparatus comprising: