JP2021151898A - Recording device - Google Patents

Abstract

To solve the problem that a conveyance member wound around a rotary member may be misaligned with respect to a recording part supported by a device body, in addition, that a conveyance belt may buckle.SOLUTION: A printer 10 includes a recording head 25, a rotary part 26, a conveyance belt 32, and a regulation plate 52. The recording head 25 can record on a medium P and is supported by a device body part 12. The rotary part 26 is rotatably supported by a device body part 12. The conveyance belt 32 is wound around the rotary part 26, is arranged to face the recording head 25, and conveys a medium P as the rotary part 26 rotates. The regulation plate 52 is attached to the device body part 12 and comes into contact with at least a part of the end part of a winding part 32A in the axial direction of the rotary part 26.SELECTED DRAWING: Figure 2

Description

The present invention relates to a recording device.

The image forming apparatus of Patent Document 1 has a configuration in which a transport belt is wound around a driven roller and a driving roller. The driven roller is provided with a fixed flange portion and a movable flange portion urged toward the fixed flange portion. The fixed flange portion and the movable flange portion are in contact with both end faces in the width direction of the transport belt. Both ends of the driven roller in the axial direction are supported by bearings provided on the main body frame.

Japanese Unexamined Patent Publication No. 2006-225129

Even if a member such as the movable flange portion of Patent Document 1 is used to suppress the vibration of the transport belt with respect to the driven roller, the bearing portion still has dimensional tolerances and assembly tolerances. For this reason, the conveyor belt may also vibrate in the axial direction as the driven roller vibrates in the axial direction with respect to the apparatus main body in the bearing portion. As a result, the position of the transfer belt with respect to the main body of the apparatus may be displaced, and as a result, the position of the transfer belt with respect to the recording unit may be displaced.
Further, if the movement of the portion of the transport belt that is not wound around the driven roller is restricted in order to suppress the vibration of the conveyor belt in the axial direction of the driven roller, the conveyor belt may buckle.

The recording device according to the present invention for solving the above problems includes a recording unit that can record on a medium and is supported by the device body, at least one rotating member that is rotatably supported by the device body, and the rotating member. When a transport member that is wound around the recording unit and faces the recording unit and conveys the medium as the rotating member rotates, and a portion of the transport member that is wound around the rotating member is used as the winding portion. It is characterized in that it is attached to the main body of the apparatus and includes a contact portion that comes into contact with at least a part of an end portion of the winding portion in the axial direction of the rotating member.

The schematic diagram which shows the main part structure of the printer which concerns on Embodiment 1. FIG. A plan view of a main part of the printer according to the first embodiment as viewed from the Z direction. The perspective view of the main part of the printer which concerns on Embodiment 1. FIG. The vertical sectional view of the part including the drive roller of the printer which concerns on Embodiment 1. FIG. FIG. 5 is an enlarged vertical cross-sectional view of one end and a peripheral portion in the axial direction of the drive roller of the printer according to the first embodiment. FIG. 5 is an enlarged vertical cross-sectional view of the other end portion and the peripheral portion in the axial direction of the drive roller of the printer according to the first embodiment. The perspective view which shows the regulation plate of the printer which concerns on Embodiment 1. FIG. FIG. 3 is a vertical cross-sectional view showing a state in which the transport belt of the printer according to the first embodiment and the regulation plate are in contact with each other. FIG. 3 is a perspective view showing a state in which the transport belt of the printer according to the first embodiment and the regulation plate are in contact with each other. FIG. 5 is a vertical cross-sectional view showing an outline of a transport belt and a drive roller of the printer according to the first embodiment. FIG. 3 is a schematic plan view showing a state in which the transport belt of the printer according to the second embodiment and the regulation plate are in contact with each other. FIG. 3 is a vertical cross-sectional view showing an outline of a transport belt and a drive roller of the printer according to the third embodiment. FIG. 3 is a perspective view of a ball unit provided in the printer according to the third embodiment.

Hereinafter, the present invention will be schematically described.
The recording device according to the first aspect is wound around the rotating member, a recording unit that can record on a medium and is supported by the device main body, at least one rotating member that is rotatably supported by the device main body, and the like. When a transport member that faces the recording unit and conveys the medium as the rotating member rotates, and a portion of the transport member that is wound around the rotating member is used as a winding portion, it is attached to the main body of the device. The rotating member is provided with a contact portion that comes into contact with at least a part of the end portion of the winding portion in the axial direction.

According to this aspect, when the transport member moves in the axial direction with the rotation of the rotating member, the contact portion comes into contact with at least a part of the end portion in the axial direction. The displacement of the transport member with respect to the contact portion is suppressed.
Here, since the contact portion is attached to the device main body, the displacement of the transport member with respect to the device main body is suppressed. As a result, it is possible to suppress the misalignment of the transport member with respect to the recording unit.
Further, when viewed from the axial direction, the moment of inertia of area of the winding portion is larger than the moment of inertia of area of the portion of the transport member other than the winding portion. Therefore, when the contact portion comes into contact with the transport member, the transport member is less likely to be deformed, so that buckling of the transport member can be suppressed.

The recording device according to the second aspect is characterized in that, in the first aspect, the contact portion is movable in the circumferential direction of the transport member.

According to this aspect, when the contact portion comes into contact with the winding portion, the contact portion is moved in the circumferential direction. As a result, the frictional force acting on the contact portion between the contact portion and the transport member is smaller than that in the configuration in which the contact portion is not moved in the circumferential direction, so that the load acting on the transport member is suppressed. can do.

In the recording device according to the third aspect, in the first aspect or the second aspect, at least one of the contact portion and the winding portion is generated by the contact between the contact portion and the winding portion. It is characterized by having a low friction portion that reduces the frictional force.

According to this aspect, the frictional force acting on the abutting portion between the abutting portion and the winding portion is reduced as compared with the configuration having no low friction portion, so that the winding portion abuts the abutting portion. It is possible to suppress an increase in the frictional force acting on the transport member when sliding with respect to the portion.

The recording device according to the fourth aspect has, in any one of the first to third aspects, the abutting portion includes a main body portion that abuts at least a part of the winding portion and the main body portion. It has an extending portion extending upstream in the circumferential direction of the medium, and the distance between the extending portion and the conveying member in the axial direction is widened toward the upstream in the circumferential direction.

According to this aspect, the contact area between the contact portion and the device main body is larger due to the extending portion as compared with the configuration of only the main body portion, so that the contact portion is attached to the device main body. The state can be stabilized. Further, since the distance between the extending portion and the transport member in the axial direction is widened toward the upstream in the transport direction, the extending portion is before the main body portion and the transport member come into contact with each other. And the transport member are less likely to come into contact with each other. As a result, it is possible to suppress an increase in the load acting on the transport member when the transport member orbits around. That is, it is possible to stabilize the mounting state of the contact portion and suppress an increase in the load acting on the transport member.

The recording device according to the fifth aspect is characterized in that, in any one of the first to fourth aspects, the recording unit is supported by the device main body.

According to this aspect, the recording unit and the contact unit are supported by the same device main body. As a result, as compared with the configuration in which the recording unit and the contact portion are separately supported by different members, the displacement of the contact portion with respect to the recording unit is suppressed, so that the transport member with respect to the recording unit is suppressed. The misalignment can be further suppressed.

The recording apparatus according to the sixth aspect is characterized in that, in any one of the first to fifth aspects, the abutting portion abuts on the end portion of the top portion of the winding portion. ..

According to this aspect, the winding portion is supported by the rotating member. In particular, at the top of the winding portion, since the winding portion includes the top and is supported by the rotating member before and after the circumferential direction of the top, the contact area between the transport member and the rotating member. Fluctuation becomes smaller. As a result, the fluctuation of the frictional force acting on the top is suppressed, so that the deformation of the end portion of the top in the axial direction is also suppressed. It is possible to suppress fluctuations in the contact area between the contact portion and the contact portion.

[Embodiment 1]
Hereinafter, the printer 10 of the first embodiment as an example of the recording device according to the present invention will be specifically described.
FIG. 1 shows the printer 10. The printer 10 is configured as an inkjet type device that records by ejecting ink, which is an example of a liquid, onto a medium P typified by recording paper. In each figure, the XYZ coordinate system is shown. The X, Y and Z directions are orthogonal to each other.
The Z direction is the device height direction and the vertical direction of the printer 10.
The X direction is the device width direction and the horizontal direction of the printer 10.
The Y direction is an example of the axial direction, and is the device depth direction and the horizontal direction of the printer 10.

In the following description, the upper part of the Z direction is referred to as the + Z direction and the lower part is referred to as the −Z direction with respect to the central portion of the printer 10. Further, when viewed from an operator (not shown) of the printer 10, the left side of the X direction is referred to as the + X direction and the right side is referred to as the −X direction with respect to the central portion of the printer 10. Further, with respect to the central portion of the printer 10, the front side of the Y direction is referred to as the + Y direction, and the back side is referred to as the −Y direction.
The transport direction of the medium P is, for example, the X direction. Specifically, the medium P is conveyed in the + X direction in a region facing the recording head 25, which will be described later.

As shown in FIG. 2, the printer 10 has a device main body 12 as an example of the device main body. The apparatus main body 12 includes a bottom frame (not shown), and a main frame 14 and a main frame 15 that are upright from the bottom frame in the + Z direction and face each other in the Y direction. The main body frame 14 and the main body frame 15 are arranged along the XZ plane, respectively. The device main body 12 may include at least a main body frame 14 and a main body frame 15 facing in the Y direction.
The device main body 12 includes a control unit 16, a coupling member 17, a drive unit 18, an image forming unit 20 (see FIG. 1), a scanning unit 22, and a medium accommodating unit and a medium accumulating unit (not shown). Is provided.

The control unit 16 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and a storage (not shown), and transports the medium P in the printer 10 and the recording head 25 described later. Controls the recording operation of information on the medium P and the like.
The coupling member 17 is rotatably supported by a bracket (not shown) with the Y direction as the axial direction.
The drive unit 18 includes a motor and gears (not shown). Further, the drive unit 18 rotationally drives or stops the coupling member 17 based on the instruction information from the control unit 16.
The scanning unit 22 includes a carriage 23, a guide rail 24 that supports the carriage 23, and a carriage motor (not shown). Further, the scanning unit 22 drives the carriage motor based on the instruction information from the control unit 16 to reciprocate the carriage 23 in the Y direction along the guide rail 24.

As shown in FIG. 1, the image forming unit 20 includes a recording head 25, a rotating unit 26, a transport belt 32, and a regulation plate 52 as main parts. Further, the image forming unit 20 includes a platen 42 and a tension roller 44.
The platen 42 is arranged along the XY plane by being erected on the main body frame 14 (see FIG. 2) and the main body frame 15.
The tension roller 44 comes into contact with the inner peripheral surface of the transport belt 32, which will be described later, to apply tension to the transport belt 32.

The recording head 25 is an example of a recording unit, and has a plurality of nozzles (not shown). Further, the recording head 25 is fixed to the carriage 23 and supported by the carriage 23. Further, the guide rail 24 is supported by the device main body 12 as an example. In other words, the recording head 25 is supported by the apparatus main body 12 via the carriage 23 and the guide rail 24 as an example.
The lower surface of the recording head 25 is a nozzle surface on which ink is ejected toward the medium P. The recording head 25 records by ejecting ink to the medium P.
The rotating portion 26 is an example of a rotating member, and has a driving roller 27 and a driven roller 28. Further, the rotating portion 26 is rotatably supported by the apparatus main body portion 12. In the + X direction, the drive roller 27 is arranged downstream of the driven roller 28.

As shown in FIG. 2, the drive roller 27 extends in the Y direction as an axial direction. One end of the drive roller 27 in the + Y direction is rotatably supported by the main body frame 14 via a bearing 29A. The other end of the drive roller 27 in the −Y direction is rotatably supported by the main body frame 15 via a bearing 29B. A coupling member 31 is provided at the end of the drive roller 27 in the −Y direction. The "end" of the member is a concept that includes not only the end face of the member but also a portion adjacent to the end face.
The coupling member 31 is connected to the coupling member 17. As a result, the drive roller 27 is rotationally driven by the drive unit 18. The bearings 29A and 29B are supported by the main body frames 14 and 15 via support blocks 46 (see FIG. 3) described later, respectively. The internal structure of the drive roller 27 will be described later.

The driven roller 28 extends with the Y direction as the axial direction. One end of the driven roller 28 in the + Y direction is rotatably supported by the main body frame 14 via a bearing 29C. The other end of the driven roller 28 in the −Y direction is rotatably supported by the main body frame 15 via a bearing 29D.
The outer diameter of the driving roller 27 and the outer diameter of the driven roller 28 are, as an example, substantially the same size. The bearings 29C and 29D are supported by the main body frames 14 and 15 via support blocks 47 (see FIG. 3), which will be described later, respectively.

As shown in FIG. 1, the transport belt 32 is an example of a transport member, and is formed in a cylindrical shape that is long in the Y direction and in an endless shape in the X direction. A part of the transport belt 32 is wound around the drive roller 27 and the driven roller 28. Here, by applying tension to the transport belt 32 by the tension roller 44, the wound state of the transport belt 32 with respect to the drive roller 27 and the driven roller 28 is maintained.

Of the transport belt 32, a portion wound around at least one of the drive roller 27 and the driven roller 28 is referred to as a winding portion 32A. Further, of the transport belt 32, a portion of the transport belt 32 that is not wound around the drive roller 27 and the driven roller 28 and is along the X direction is referred to as a flat portion 32B.
The flat portion 32B is supported by the platen 42 and is arranged to face the recording head 25 in the Z direction. Then, the transport belt 32 transports the medium P in the + X direction as the drive roller 27 and the driven roller 28 rotate.

As shown in FIG. 3, a notch 14A opening in the + Z direction is formed at the end of the main body frame 14 in the + X direction. One support block 46 is fitted in the Z direction with respect to the notch 14A. A bearing 29A (see FIG. 2) is provided on one of the support blocks 46 so as to be slidable in the Y direction.
A notch 15A that opens in the + Z direction is formed at the end of the main body frame 15 in the + X direction. The other support block 46 is fitted in the Z direction with respect to the notch 15A. A bearing 29B (see FIG. 2) is attached to the other support block 46.

One support block 47 is provided at the end of the main body frame 14 in the −X direction. A bearing 29C (see FIG. 2) is provided on one of the support blocks 47 so as to be slidable in the Y direction.
The other support block 47 is provided at the end of the main body frame 15 in the −X direction. A bearing 29D (see FIG. 2) is attached to the other support block 47.
As described above, the bearings 29A and 29C are slidable in the Y direction, whereas the bearings 29B and 29D do not move in the Y direction. The support blocks 46 and 47 are included in the device main body 12.

Here, the transport belt 32 is wound around the drive roller 27 and the driven roller 28, and the support block 46 is fitted into the notches 14A and 15A in a state where the driven roller 28 is supported by the main body frames 14 and 15. It is provided so that it can move around. The direction in which the transport belt 32 moves is referred to as the circumferential direction. In the following description, the orbital direction is referred to as the + R direction and is illustrated by the + R arrow. The + R direction is the circumferential direction of the transport belt 32 when recording is performed on the medium P by the recording head 25.

As shown in FIG. 4, the drive roller 27 has one tubular portion 27A, two side plate portions 27B, and shaft portions 27C and 27D.
The tubular portion 27A is formed in a cylindrical shape with the Y direction as the axial direction. The outer diameter of the tubular portion 27A is d1 (mm). The two side plate portions 27B are formed in a disk shape and are fitted to both ends of the tubular portion 27A in the Y direction. The shaft portion 27C is formed in a columnar shape and extends in the −Y direction from the side plate portion 27B located in the −Y direction. The shaft portion 27D is formed in a columnar shape and extends in the + Y direction from the side plate portion 27B located in the + Y direction.

As shown in FIG. 5, the shaft portion 27C is rotatably supported by the main body frame 15 by being supported by the bearing 29B and the support block 46. Further, the shaft portion 27C is connected to the coupling member 31 via the connecting portion 33. The bearing 29B is configured as an angular ball bearing as an example.
Let L1 (mm) be the length corresponding to the distance between the main body frame 15 and the tubular portion 27A in the Y direction. Further, the thickness of the transport belt 32 is t1 (mm: see FIG. 8). Note that IL1 in FIG. 5 is a virtual line extending in the Z direction along the end face of the main body frame 15 in the + Y direction in the + Y direction.

As shown in FIG. 6, the shaft portion 27D is rotatably supported by the main body frame 14 by being supported by the bearing 29A and the support block 46. No other member is connected to the shaft portion 27D. The bearing 29A is configured as a spherical roller bearing as an example.
The length corresponding to the distance between the main body frame 14 and the tubular portion 27A in the Y direction is L2 (mm). As an example, the size of L2 is equal to the size of L1 (see FIG. 5). Note that IL2 in FIG. 6 is a virtual line extending in the Z direction along the end face of the main body frame 14 in the −Y direction in the −Y direction.

As shown in FIG. 7, the regulation plate 52 is an example of the contact portion, and is formed in a flat plate shape with the Y direction as the thickness direction. Further, as an example, the regulation plate 52 is provided one by one corresponding to both ends of the drive roller 27 (see FIG. 2) in the Y direction and both ends of the driven roller 28 (see FIG. 2) in the Y direction. There is. In other words, in this embodiment, a total of four regulation plates 52 are provided.
As an example, the shape of the regulation plate 52 is square when viewed from the Y direction. When viewed from the Y direction, the length of one side of the regulation plate 52 is L3 (mm). The length L3 is longer than the outer diameter d1 (see FIG. 4) of the drive roller 27. Further, the length corresponding to the thickness of the regulation plate 52 is L4 (mm). The length L4 is longer than the length L1 (see FIG. 5) or the length L2 (see FIG. 6) described above.

The position at the center of the regulation plate 52 when viewed from the Y direction is indicated by a point C. Further, the regulation plate 52 is formed with a through hole 53 that penetrates the regulation plate 52 in the Y direction. The shape of the through hole 53 is a circle centered on the point C when viewed from the Y direction. The inner diameter of the through hole 53 is d2 (mm). The inner diameter d2 is longer than the outer diameter d1 (see FIG. 4) and shorter than the length L3. As a result, when the regulation plate 52 and the drive roller 27 are attached to the main body frame 15, the drive roller 27 in the Y direction (axial direction) when viewed from the Z direction (direction intersecting the axial direction of the drive roller 27). The end overlaps the regulation plate 52.
The corner portion around the through hole 53 in the regulation plate 52 is referred to as a peripheral edge portion 54. Through holes 55 penetrating in the Y direction are formed in each of the four peripheral edges 54. A screw (not shown) is inserted into the through hole 55. The screws (not shown) fasten the regulation plate 52 to the support block 46 (see FIG. 3) or the support block 47 (see FIG. 3). As a result, the regulation plate 52 is attached to the device main body 12 (see FIG. 3).

In the four peripheral edges 54, the surface facing the transport belt 32 in the Y direction is referred to as a contact surface 56, and a surface that contacts the support blocks 46 and 47 (see FIG. 3) on the side opposite to the contact surface 56 is attached. It is referred to as surface 57. The mounting surface 57 is a flat surface along the XZ surface.
The contact surface 56 is an example of a low friction portion and is made of a fluororesin. As a result, the contact surface 56 reduces the frictional force generated by the contact between the regulation plate 52 and the winding portion 32A in the orbital movement of the transport belt 32 as compared with the frictional force without the contact surface 56. It has become. In this embodiment, as an example, the entire regulation plate 52 is made of the same fluororesin as the contact surface 56. Further, the transport belt 32 is made of silicon rubber as an example.

FIG. 8 shows a part of the drive roller 27 including the end portion in the + Y direction, and a part of the regulation plate 52 and the support block 46. Here, the central axis (not shown) of the drive roller 27 and the center of the through hole 53 of the regulation plate 52 are located on substantially the same straight line. Further, the outer diameter d1 (see FIG. 4) of the drive roller 27 is equal to or less than the inner diameter d2 (see FIG. 7) of the through hole 53. Therefore, when the position of the drive roller 27 is deviated in the Y direction by a length corresponding to the assembly tolerance or the dimensional tolerance, the end portion of the drive roller 27 in the Y direction enters the inside of the through hole 53. It has become. In this case, since the transport belt 32 is wound around the drive roller 27, the transport belt 32 is moved as the drive roller 27 moves in the Y direction.

As shown in FIGS. 7 and 9, when the position of the transport belt 32 shifts in the Y direction, a part of the winding portion 32A and the flat portion 32B of the transport belt 32 comes into contact with the contact surface 56 in the Y direction. It is designed to do.
As shown in FIG. 7, the region in which the contact surface 56 and the transport belt 32 of the regulation plate 52 come into contact with each other is referred to as a region S. Region S is shown as a region surrounded by an alternate long and short dash line. The shape of the region S is a U shape that opens in the X direction when viewed from the Y direction.

As shown in FIG. 10, the position in the + Z direction with respect to the point C and the center of the boundary between the winding portion 32A and the flat portion 32B is defined as the point D. Further, the position in the + X direction with respect to the point C and the position corresponding to the apex of the arc of the winding portion 32A is defined as the point E. Further, a position that is in the −Z direction with respect to the point C and is at the center of the boundary between the winding portion 32A and the flat portion 32B is defined as the point F. The distance between the point E and the point D is equal to the distance between the point E and the point F. Points D, E, and F are all located in the area S (see FIG. 7). In other words, the entire winding portion 32A can come into contact with the regulation plate 52 in the Y direction. In the present embodiment, as an example, a part of the flat portion 32B can come into contact with the regulation plate 52 in the Y direction.

In the transport belt 32, the region corresponding to the winding portion 32A is referred to as a region A1, and the region corresponding to the flat portion 32B is referred to as a region A2. In the region A1, the inner peripheral surface of the transport belt 32 and the outer peripheral surface of the drive roller 27 are in contact with each other. In the area A2, the transport belt 32 and the drive roller 27 do not come into contact with each other. In the winding portion 32A, the points E and the peripheral portions of the points E are collectively referred to as the top portion 32C.

Calculated using the known formula of the moment of inertia of area, the moment of inertia of area of the transport belt 32 in the region A1 is calculated from the moment of inertia of area 32 in the region A2 in the + Z direction when viewed from the Y direction. Is also big. That is, the moment of inertia of area of the winding portion 32A is larger than the moment of inertia of area of the flat portion 32B. Therefore, when an external force acts on the transport belt 32 in the Y direction, the winding portion 32A is less likely to bend than the flat portion 32B.

As described above, the regulation plate 52 is configured to come into contact with the entire winding portion 32A and a part of the flat portion 32B among the end portions of the transport belt 32 in the Y direction. Further, the regulation plate 52 comes into contact with the end of the top 32C of the winding portion 32A in the + R direction of the transport belt 32 in the Y direction.

Here, the top 32C will be described in detail. The shapes of the drive roller 27 and the driven roller 28 are the same as each other, and the direction along the virtual line connecting the center of the rotating shaft of the driving roller 27 and the center of the rotating shaft of the driven roller 28 is considered. Regarding the winding portion 32A of the drive roller 27, the region near the point E corresponding to the maximum coordinate in the + X direction in the direction along the virtual line is the top portion 32C of the winding portion 32A. Regarding the winding portion 32A of the driven roller 28, the region near the point corresponding to the maximum coordinate in the −X direction in the direction along the virtual line is the top of the winding portion 32A.
In the circumferential direction + R, the vicinity of the point corresponding to the maximum coordinate in the direction along the resultant force of the tension acting on the transport belt 32 upstream of the drive roller 27 and the tension acting on the transport belt 32 downstream of the drive roller 27. Can be said to be the top of the winding portion 32A. This also applies to the driven roller 28.

As an example, the contact state between the transport belt 32 and the regulation plate 52 is the same for the winding portion 32A wound around the drive roller 27 and the winding portion 32A wound around the driven roller 28 (see FIG. 2). It has become. Therefore, the description of the regulation plate 52 corresponding to the winding portion 32A wound around the driven roller 28 will be omitted.

Next, the operation of the printer 10 of the first embodiment will be described.
In the printer 10 shown in FIG. 2, the drive roller 27 is driven and the transport belt 32 is moved around, so that the medium P is conveyed in the + X direction. Then, the ink is ejected from the recording head 25 to the medium P, so that recording is performed on the medium P.
Here, due to the component tolerances of the transport belt 32, the drive roller 27, and the driven roller 28, there is a difference between the peripheral length of the end portion of the transport belt 32 in the + Y direction and the peripheral length of the end portion in the −Y direction. If so, a force in the Y direction acts on the transport belt 32, and the transport belt 32 may move in the + Y direction or the −Y direction. The contact state between the transport belt 32 and the regulation plate 52 is the same in the + Y direction and the −Y direction. Therefore, the movement of the transport belt 32 in the + Y direction will be described, and the description of the movement in the −Y direction will be omitted.

According to the printer 10, when the transport belt 32 moves in the + Y direction or the −Y direction with the rotation of the drive roller 27 and the driven roller 28, the regulation plate 52 has the winding portion 32A and the flat portion 32B of the transport belt 32. The displacement of the transport belt 32 with respect to the regulation plate 52 is suppressed by abutting with a part of the regulating plate 52.
Here, since the regulation plate 52 is attached to the device main body 12, even if the drive roller 27 and the driven roller 28 are displaced in the Y direction, the displacement of the transport belt 32 with respect to the device body 12 in the Y direction is suppressed. NS. As a result, the displacement of the transport belt 32 in the Y direction with respect to the recording head 25 can be suppressed.
By suppressing the displacement of the transport belt 32 with respect to the recording head 25 in the Y direction, the recording position of the recording head 25 with respect to the scheduled recording position of the medium P transported by the transport belt 32 is suppressed. The recording quality of the printer 10 can be improved.

Further, when viewed from the Y direction, the moment of inertia of area of the winding portion 32A is larger than the moment of inertia of area of the flat portion 32B other than the winding portion 32A of the transport belt 32. Therefore, when the regulation plate 52 comes into contact with the transport belt 32, the transport belt 32 is less likely to be deformed, so that buckling of the transport belt 32 can be suppressed.
In the printer 10, the transport belt 32 and the regulation plate 52 are in contact with each other, but the regulation plate 52 and the drive roller 27 are not in contact with each other. Therefore, as compared with the configuration in which the drive roller 27 and the regulation plate 52 are in contact with each other, the rotation of the drive roller 27 is less likely to be restricted, so that the rotation speed of the drive roller 27 can be suppressed from fluctuating.

As shown in FIG. 9, according to the printer 10, the contact portion between the contact surface 56 of the regulation plate 52 and the winding portion 32A is compared with the configuration without the contact surface 56 as an example of the low friction portion. Since the frictional force acting on the transport belt 32 is reduced, it is possible to suppress an increase in the frictional force acting on the transport belt 32 when the winding portion 32A slides on the regulation plate 52.

As shown in FIG. 2, according to the printer 10, the recording head 25 and the regulation plate 52 are supported by the same main body frames 14 and 15. As a result, the displacement of the regulation plate 52 with respect to the recording head 25 is suppressed as compared with the configuration in which the recording head 25 and the regulation plate 52 are separately supported by different members, so that the displacement of the conveyor belt 32 with respect to the recording head 25 is suppressed. Can be further suppressed.

As shown in FIG. 10, according to the printer 10, the winding portion 32A is supported by the drive roller 27. In particular, at the top 32C of the winding portion 32A, since the winding portion 32A includes the top 32C and is supported by the drive roller 27 before and after the top 32C in the + R direction, the contact area between the transport belt 32 and the drive roller 27. Fluctuation becomes smaller. As a result, the fluctuation of the frictional force acting on the top 32C is suppressed, and the deformation of the end portion of the top 32C in the Y direction is also suppressed. It is possible to suppress fluctuations in the contact area with the regulation plate 52.

As shown in FIGS. 5 and 6, according to the printer 10, in a state where the regulation plate 52 and the drive roller 27 are attached to the main body frame 15, from the Z direction (the direction intersecting the axial direction of the drive roller 27). As seen, the end of the drive roller 27 in the Y direction (axial direction) overlaps the regulation plate 52. As a result, it is possible to prevent the end portion (end face) of the drive roller 27 in the Y direction from coming off the regulation plate 52 as the drive roller 27 moves in the Y direction (axial direction). Therefore, after the end portion (end face) of the drive roller 27 in the Y direction is detached from the regulation plate 52, when the end portion (end face) of the drive roller 27 tries to engage with the regulation plate 52 again due to vibration, For example, it is possible to prevent the end portion (end face) of the drive roller 27 from colliding with the contact surface 56 due to the assembly tolerance or the tension state of the transport belt 32. That is, the movement of the drive roller 27 in the axial direction is hindered, a state in which a predetermined gap is formed from the end of the winding portion 32A in the axial direction to the contact surface 56 is maintained, and the Y It is possible to suppress the inhibition of the vibration suppressing action of the transport belt 32 in the direction.

[Embodiment 2]
Next, the printer 60 of the second embodiment as an example of the recording device according to the present invention will be described. The parts common to the printer 10 of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Further, the description of the same operation and effect as that of the printer 10 of the first embodiment will be omitted.

As shown in FIG. 11, the printer 60 includes a regulation plate 62 in place of the regulation plate 52 (see FIG. 2) in the printer 10 (see FIG. 2). The configuration other than the regulation plate 62 is the same as that of the first embodiment. Two regulation plates 62 are provided for each of the drive roller 27 and the driven roller 28 (see FIG. 2), but since they function in the same manner, the regulation plate 62 in the + Y direction with respect to the drive roller 27 will be described here. However, the description of the other regulation plate 62 will be omitted.

The regulation plate 62 is an example of the contact portion, and is formed in a plate shape with the Y direction as the thickness direction. As an example, the shape of the regulation plate 62 is square when viewed from the Y direction. The length of one side of the regulation plate 62 is L3 (see FIG. 7).
The regulation plate 62 is formed with a through hole 63 that penetrates the regulation plate 62 in the Y direction. The through hole 63 has the same size and shape as the through hole 53 (see FIG. 7). Further, the through hole 63 is formed so as to straddle the main body portion 67 and the extending portion 68, which will be described later.

A peripheral edge 64 is formed around the through hole 63 in the regulation plate 62. A through hole (not shown) penetrating in the Y direction is formed in the peripheral edge portion 64. A screw (not shown) is inserted through the through hole. The screw fastens the regulation plate 62 to the support block 46 (see FIG. 6) or the body frame 14. As a result, the regulation plate 62 is attached to the device main body 12.

In the peripheral edge portion 64, the surface facing the transport belt 32 in the Y direction and in contact with the transport belt 32 is referred to as a contact surface 65. The surface that contacts the support block 46 (see FIG. 6) or the main body frame 14 on the side opposite to the contact surface 65 is referred to as a mounting surface 66. The mounting surface 66 is a flat surface along the XZ surface.
The contact surface 65 is an example of a low friction portion and is made of a fluororesin. As a result, the contact surface 65 reduces the frictional force generated by the contact between the regulation plate 62 and the winding portion 32A in the orbital movement of the transport belt 32 as compared with the frictional force without the contact surface 65. It has become. In this embodiment, as an example, the entire regulation plate 62 is made of the same fluororesin as the contact surface 65.

Specifically, the regulation plate 62 has, for example, a main body portion 67 and an extending portion 68 extending in the −X direction, which is upstream in the X direction (circumferential direction + R) from the main body portion 67.
The main body portion 67 is a flat plate-shaped portion having a thickness in the Y direction that is substantially constant in the X direction. The length of the main body 67 in the X direction is approximately ½ of the length L3 of the regulation plate 52 (see FIG. 7) in the X direction. The main body portion 67 is arranged so as to be in contact with the winding portion 32A in the Y direction. A contact surface 65 and a mounting surface 66 are formed on the main body portion 67.

The extending portion 68 is formed in a right-angled trapezoidal shape when viewed from the Z direction. The length of the extending portion 68 in the X direction is approximately ½ of the length L3 (see FIG. 7). The thickness of the extending portion 68 in the Y direction gradually decreases in the −X direction. Further, the distance K between the extending portion 68 and the transport belt 32 in the Y direction gradually increases toward the upstream in the X direction. A contact surface 65 is not formed on the extending portion 68, and an inclined surface 69 and a mounting surface 66 are formed in the Y direction.

The inclined surface 69 extends in an oblique direction intersecting the X direction and the Y direction when viewed from the Z direction. Specifically, the inclined surface 69 is inclined so that the end portion in the −X direction is located in the + Y direction with respect to the end portion in the + X direction. The inclination angle θ of the inclined surface 69 with respect to the X direction is set in advance so that the inclined surface 69 and the transport belt 32 do not come into contact with each other. The inclined surface 69 and the contact surface 65 are connected to each other via a curved surface 71. Since the curved surface 71 is formed, the transport belt 32 is less likely to be caught on the boundary portion between the inclined surface 69 and the contact surface 65.

Next, the operation of the printer 60 of the second embodiment will be described.
According to the printer 60, the contact area between the regulation plate 62 and the main body 67 is larger due to the extending portion 68 as compared with the configuration of only the main body 67, so that the regulation plate 62 is attached to the device main body 12. Can be stabilized. Further, the distance K between the extending portion 68 and the transport belt 32 in the Y direction is widened toward the upstream in the X direction, so that the extending portion 68 and the transport belt 32 come into contact with each other before the main body portion 67 and the transport belt 32 come into contact with each other. It becomes difficult for the conveyor belt 32 to come into contact with the conveyor belt 32. Further, as compared with the case where the regulation plate 62 is composed of only the main body portion 67, the end portion (end face) of the transport belt 32 in the Y direction comes into contact with the corner portion of the main body portion 67, and the end portion of the transport belt 32 It is possible to prevent the (end face) from being worn. As a result, when the transport belt 32 orbits around, it is possible to prevent the load acting on the transport belt 32 from becoming large. That is, the mounting state of the main body portion 67 can be stabilized, and the load acting on the transport belt 32 can be suppressed from becoming large.

[Embodiment 3]
Next, the printer 80 of the third embodiment as an example of the recording device according to the present invention will be described. The parts common to the printer 10 of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Further, the description of the same operation and effect as that of the printer 10 of the first embodiment will be omitted.

As shown in FIG. 12, the printer 80 includes a ball unit 82 in place of the regulation plate 52 (see FIG. 10) in the printer 10 (see FIG. 2). The configuration other than the ball unit 82 is the same as that of the first embodiment. A total of 12 ball units 82 are provided, three for each one end and the other end of the drive roller 27 and the driven roller 28 (see FIG. 2), but since they function in the same manner, they are driven here. The three ball units 82 in the −Y direction with respect to the roller 27 will be described, and the description of the other ball units 82 will be omitted.

As shown in FIG. 13, the ball unit 82 is an example of a contact portion and has a structure similar to that of a known ball caster. Specifically, the ball unit 82 has a spherical ball 83, a cover 84 that rotatably holds the ball 83, and a flange 85 that projects outward from the cover 84.
The cover 84 has a cylindrical portion 84A whose axial direction is the Y direction, and an annular portion 84B formed at an end portion of the cylindrical portion 84A in the −Y direction. The annular portion 84B has a hole portion 84C.
The ball 83 has an outer peripheral surface 83A. A part of the outer peripheral surface 83A is exposed to the outside from the hole 84C. The other portion of the outer peripheral surface 83A is housed in the cover 84.
The flange portion 85 projects outward from the end of the cylindrical portion 84A in the + Y direction along the XX plane. Further, the flange portion 85 is formed in a plate shape with the Y direction as the thickness direction. A mounting hole 86 penetrating in the Y direction is formed in the flange portion 85.

As shown in FIG. 12, one ball unit 82 is arranged at each of the points D, E, and F as an example. In other words, the three ball units 82 are arranged at intervals in the + R direction. The balls 83 (see FIG. 13) of the three ball units 82 are in contact with the end faces of the transport belt 32 in the Y direction at points D, E, and F. In this way, the three ball units 82 are in contact with the end of the winding portion 32A including the top portion 32C in the Y direction.

Each of the three ball units 82 is attached to the device main body 12 (see FIG. 6) by fastening the flange portion 85 (see FIG. 13) to the support block 46 (see FIG. 6) using a screw (not shown). Has been done.
Here, the ball 83 of the ball unit 82 is provided so as to be movable in the + R direction, which is the circumferential direction of the transport belt 32. In other words, the ball unit 82 is configured such that the ball 83 is rolled so that the position of the exposed outer peripheral surface 83A (see FIG. 13) changes in the + R direction as the transport belt 32 moves in the + R direction. Has.

Next, the operation of the printer 80 of the third embodiment will be described.
According to the printer 80, when the ball unit 82 comes into contact with the winding portion 32A, the ball 83 of the ball unit 82 moves in the + R direction, that is, is rolled. As a result, the frictional force acting on the contact portion between the ball unit 82 and the transport belt 32 is smaller than that in the configuration in which the member in contact with the transport belt 32 is not moved in the + R direction, so that the load acting on the transport belt 32 is reduced. Can be suppressed.

The printer 10 according to the first embodiment of the present invention, the printer 60 according to the second embodiment, and the printer 80 according to the third embodiment basically have the above-mentioned solid configurations. Of course, it is also possible to change or omit a partial configuration within a range that does not deviate from.

The printers 10 and 60 may have a portion that does not have the contact surfaces 56 and 65 as an example of the low friction portion and has a larger frictional force with the transport belt 32 than the contact surfaces 56 and 65.
The transport belt 32 is not limited to that made of silicon rubber, and may be made of other rubber or resin. Further, the transport member is not limited to the transport belt 32, and a known endless chain may be adopted. That is, the above embodiment can be applied to a transport member in which skewing may occur when wound on various rollers.

The material constituting the regulation plate 52 is not limited to fluororesin, and may be any of a metal material, a rubber material, and a resin material according to the material constituting the transport belt 32. Further, the regulation plate 52 is not limited to the configuration having the low friction portion, and the low friction portion may be provided at both ends of the transport belt 32 in the Y direction. Further, both the regulation plate 52 and the transport belt 32 may have a low friction portion.
The regulation plate 52 may come into contact with a portion of the transport belt 32 that is different from the top 32C. Further, the regulation plate 52 is not limited to one that comes into contact with the entire winding portion 32A, but may also come into contact with a part of the winding portion 32A in the circumferential direction or a part of the transport belt 32 in the thickness direction. good.

In the printer 60, the inclined surface 69 may be a curved surface that is convex or concave toward the transport belt 32.
The main body 67 is not limited to the one that comes into contact with the entire winding portion 32A, and may come into contact with a part of the winding portion 32A in the + R direction.
In the regulation plate 62, the main body portion 67 and the extending portion 68 may be formed separately, and the extending portion 68 may be provided on the main body portion 67.
The thickness of the extending portion 68 in the Y direction may be substantially constant in the −X direction. In other words, the extending portion 68 may be formed by bending a part of the regulation plate 62.

In the printer 90, the outer peripheral surface 83A of the ball 83 may be configured as a low friction portion. Further, low friction portions may be provided or formed at both ends of the transport belt 32 in the Y direction. Further, the main body 67 of the regulation plate 62 may be replaced with a plurality of ball units 82 arranged in the + R direction, and the printer 90 may be provided with the extending portion 68 instead of the ball unit 82. good.
The number of ball units 82 is not limited to three with respect to one end of the driving roller 27 or the driven roller 28 in the Y direction, and may be one, two, or four or more.
In the printers 10, 60 and 90, the recording head 25 is not limited to the one supported by the main body frame 14 and the main body frame 15, but is supported by another frame provided separately inside the printers 10, 60 and 90. It may be one.
Instead of the ball unit 82, an annular member that rotates following the driving roller 27 or the driven roller 28 or the regulation plate 52 shown in FIG. 7 may be provided. That is, the configuration and shape are not particularly limited as long as the abutting portion can rotate following the driving roller 27 or the driven roller 28 while being attached to the apparatus main body.
When an annular member is used instead of the ball unit 82, the shape of the annular member may be formed like, for example, a known disc spring washer. In this way, the distance K between the extending portion 68 and the transport belt 32 in the Y direction can be widened toward the upstream in the X direction.

In the printers 10, 60, and 90, the recording head 25 is not limited to scanning the carriage 34 in the Y direction, and may be configured as a line head that is not scanned in the Y direction. In this case, the printers 10, 60, 90 do not have to include at least the guide rail 24. That is, the recording head 25 may be directly supported by the device main body 12 without the carriage 34 and the guide rail 24, or the carriage 34 supporting the recording head 25 may be directly supported by the device main body 12. ..

The number of rotating members around which the transport belt 32 is wound may be one or three or more. Further, when the transport belt 32 is wound around a plurality of rollers, the shapes and sizes of the rotating members may be different from each other. A configuration in which at least one rotating member and a non-rotating fixed bar may be combined may be used. The case where the number of rotating members around which the transport belt 32 is wound is one is, for example, a configuration in which a single rotating member and a fixed bar are combined.

The rotating member does not have to be a roller having a cylindrical shape. In addition to a roller having a triangular or rectangular cross section when viewed from the Y direction, a ball of a bearing or a ball caster may be used.

10 ... Printer, 12 ... Device main body, 14 ... Main frame, 14A ... Notch,
14B ... notch, 15 ... body frame, 15A ... notch, 16 ... control,
17 ... Coupling member, 18 ... Drive unit, 20 ... Image forming unit, 22 ... Scanning unit,
23 ... Carriage, 24 ... Guide rail, 25 ... Recording head, 26 ... Rotating part,
27 ... Drive roller, 27A ... Cylinder, 27B ... Side plate, 27C ... Shaft, 27D ... Shaft,
28 ... driven roller, 29A ... bearing, 29B ... bearing, 29C ... bearing,
29D ... Bearing, 31 ... Coupling member, 32 ... Conveyance belt, 32A ... Winding part,
32B ... Flat part, 32C ... Top, 33 ... Connecting part, 34 ... Carriage, 42 ... Platen,
44 ... tension roller, 46 ... support block, 47 ... support block,
52 ... Regulatory plate, 53 ... Through hole, 54 ... Peripheral part, 55 ... Through hole, 56 ... Contact surface,
57 ... mounting surface, 60 ... printer, 62 ... regulation plate, 63 ... through hole, 64 ... peripheral edge,
65 ... contact surface, 66 ... mounting surface, 67 ... main body, 68 ... extending, 69 ... inclined surface,
71 ... curved surface, 80 ... printer, 82 ... ball unit, 83 ... ball,
83A ... outer peripheral surface, 84 ... cover, 84A ... cylindrical part, 84B ... annular part, 84C ... hole part,
85 ... Flange, 86 ... Mounting hole, 90 ... Printer, A1 ... Area, A2 ... Area,
d1 ... outer diameter, d2 ... inner diameter, IL1 ... virtual line, IL2 ... virtual line, L1 ... length, L2 ... length,
L3 ... length, L4 ... length, t1 ... thickness, t2 ... thickness, θ ... tilt angle

Claims (5)

A recording unit that can record on a medium and is supported by the main body of the device,
With at least one rotating member rotatably supported by the device body,
A transport member that is wound around the rotating member, faces the recording unit, and conveys the medium as the rotating member rotates.
When the portion of the transport member that is wound around the rotating member is used as the winding portion, it is attached to the main body of the device and comes into contact with at least a part of the end portion of the winding portion in the axial direction of the rotating member. Tangent and
To prepare
A recording device characterized in that. In the recording device according to claim 1,
The contact portion can move in the circumferential direction of the transport member.
A recording device characterized in that. In the recording device according to claim 1 or 2.
At least one of the contact portion and the winding portion has a low friction portion that reduces the frictional force generated by the contact between the contact portion and the winding portion.
A recording device characterized in that. In the recording device according to any one of claims 1 to 3.
The contact portion has a main body portion that comes into contact with at least a part of the winding portion, and an extending portion that extends from the main body portion to the upstream in the circumferential direction of the medium.
The distance between the extending portion and the conveying member in the axial direction increases toward the upstream in the circumferential direction.
A recording device characterized in that. In the recording device according to any one of claims 1 to 4.
The abutting portion abuts on the end of the top of the winding portion.
A recording device characterized in that.

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