JP5751501B2 - Recording device - Google Patents

Description

  The present invention relates to a recording apparatus.

  Conventionally, as a countermeasure when a curl occurs in the recording medium for some reason, a pressing member made of a thin resin sheet is provided on both sides of the recording medium, and formed between the pressing member and the medium support surface of the platen. There is provided a technique for avoiding a problem caused by curling by inserting a recording medium into the gap (for example, see Patent Document 1).

JP-A-8-197799

However, the following problems exist in the conventional technology as described above.
Since there are no countermeasures against the lifting of the pressing member, in the event of an unexpected situation, the pressing member or the recording medium will rise and come into contact with the recording head, causing a problem in the predetermined recording process. It will cause it.

  The present invention has been made in consideration of the above points, and an object of the present invention is to provide a recording apparatus that can smoothly execute a recording process.

In order to achieve the above object, the present invention employs the following configuration.
The recording apparatus of the present invention includes a medium support unit that supports a medium on a flat surface, and a pair that holds the medium so as to cover an end portion of the medium support unit that is disposed to face the medium support unit and that is orthogonal to the conveyance direction of the medium. A holding hole for adsorbing and holding the medium, and the pair of holding members include a medium holding surface for holding the medium and the medium supporting part. The distance from the flat surface in the first direction is a constant distance, and the inner side end from the flat surface in the state where the outer side end is in contact with the flat surface in the orthogonal direction. It is possible to take a second distance which is a distance larger than the distance.
The recording apparatus of the present invention includes a medium support unit that supports a medium on a flat surface, and a pair that holds the medium so as to cover an end portion of the medium support unit that is disposed to face the medium support unit and that is orthogonal to the conveyance direction of the medium. And a tensioning device that pulls the pair of retaining members in the transport direction, the tensioning device being outside of the transport direction with respect to the medium support portion and in a direction perpendicular to the flat surface. The pair of holding members are disposed at positions opposite to the pair of holding members across the flat surface, and the pair of holding members has a distance between the medium holding surface that holds the medium and the flat surface in the medium support portion, A first distance that is a constant distance, and an inner side end that is larger than the first distance from the flat surface in a state where the outer side end is in contact with the flat surface in the orthogonal direction. It can take a distance of 2 And wherein the door.
The recording apparatus of the present invention includes a medium support unit that supports a medium on a flat surface, and a pair that holds the medium so as to cover an end portion of the medium support unit that is disposed to face the medium support unit and that is orthogonal to the conveyance direction of the medium. The pair of holding members includes a first distance in which a distance between a medium holding surface that holds the medium and the flat surface of the medium support portion is a fixed distance, and the orthogonal The inner side edge can take a second distance that is larger than the first distance from the flat surface in a state where the outer side edge is in contact with the flat surface. It is a feature.
The recording apparatus of the present invention is a recording apparatus having a medium supporting portion that sucks and holds the back surface of the recording medium with a medium supporting surface, and the recording medium is provided at a side edge portion in a direction substantially perpendicular to the conveyance direction of the recording medium. A holding member that covers and holds the recording medium, and a tension device that pulls an end of the holding member in the transport direction, and the tension device is located outside the transport direction with respect to the medium support portion, and It is arranged below the medium support surface.

  Accordingly, in the recording apparatus of the present invention, since a downward force is applied to the holding member, the holding member can cover and hold the side edge portion of the holding member from above without being lifted, and contact the recording head. The recording process can be smoothly executed without causing a problem.

In the recording apparatus, it is possible to suitably adopt a configuration in which the length of the flat surface in the conveyance direction of the medium is longer than the length of the flat surface in the direction orthogonal to the conveyance direction of the medium.
In the recording apparatus described above, a configuration having a detection device that detects a tensile force applied to the holding member by the tension device can be suitably employed.
Thereby, in this invention, it can be confirmed easily whether predetermined | prescribed tension | tensile_strength (tensile | tensile_strength) is acting on a holding member, and a smooth recording process can be continued and implemented.

In the recording apparatus described above, the pair of holding members can preferably employ a configuration having a band-like portion extending in the conveyance direction of the medium with a certain width.
The tension device in the recording apparatus includes a connection portion connected to an end portion of the holding member, and a biasing member that biases the connection portion in a tension direction of the holding member, and the detection device For example, a configuration having a switch device that can be switched ON / OFF according to the difference between the tensile force with respect to the holding member and the urging force of the urging member can be suitably employed.
Accordingly, in the present invention, for example, the switch device is turned on when the tensile force on the holding member is in a predetermined range, and the switch device is turned off by the biasing force of the biasing member when the tensile force is out of the predetermined range. By using the switch, it is possible to easily detect the tension state with respect to the holding member by ON / OFF of the switch device.

In the recording apparatus described above, a configuration in which at least one of the pair of holding members is movable in a direction orthogonal to the conveyance direction of the medium can be suitably employed.
In the recording apparatus described above, a configuration in which the pair of holding members are formed of a flexible material can be suitably employed.
In the recording apparatus described above, a configuration in which the medium support portion is provided with a suction hole for sucking and holding the medium can be suitably employed.
In the recording apparatus described above, a configuration in which the medium support unit is provided with a heating unit that heats the medium support unit can be suitably employed.
The recording apparatus includes a tension device that pulls the pair of holding members in the transport direction, and the tension device is outside of the transport direction with respect to the medium support unit and is perpendicular to the flat surface. The structure arrange | positioned in the position on the opposite side to a pair of said holding member on both sides of the said flat surface can be employ | adopted suitably.
Further, as the holding member in the recording apparatus, it is possible to suitably employ a configuration having a notch shape that does not cover the recording medium at a position facing the edge of the medium support portion in the transport direction. .
Accordingly, in the present invention, the recording medium positioned at the edge of the medium support portion in the transport direction is not covered with the holding member, and is not subjected to the pressing force by the holding member that is directed outward and downward from the edge. Therefore, in the present invention, for example, when the recording medium has a two-layer structure such as label paper and has an adhesive such as glue, the adhesive protrudes by the pressing force and adheres to the medium support portion, and the recording medium is removed. You can avoid getting dirty.

FIG. 2 is a side view illustrating the outline of the entire printer according to the invention. The top view which shows the outline of the curl pressing means based on this invention. (A) (B) is front sectional drawing which shows the effect | action of the curl pressing means of this invention. The top view which shows the principal part detail of the tension | pulling apparatus 70. FIG. Sectional drawing which shows the principal part detail of the tension | pulling apparatus 70. FIG.

Hereinafter, an embodiment of a recording apparatus according to the present invention will be described with reference to FIGS.
The following embodiment shows one aspect of the present invention and does not limit the present invention, and can be arbitrarily changed within the scope of the technical idea of the present invention. Moreover, in the following drawings, in order to make each configuration easy to understand, the actual structure is different from the scale and number of each structure.

  FIG. 1 is a side view showing an outline of an entire inkjet printer (hereinafter referred to as “printer”) 1 as a “liquid ejecting apparatus” shown as an example of a “recording apparatus” according to the present invention. FIG. 2 is a plan view schematically showing the curl pressing means according to the present invention.

  Here, the liquid ejecting apparatus is an ink jet ejecting apparatus that performs recording on a recording material by ejecting ink from a recording head as a liquid ejecting head to a recording material such as recording paper, a copying machine, a facsimile, or the like. In this recording apparatus, a liquid corresponding to a specific application is ejected from the liquid ejecting head corresponding to the recording head to the ejected material corresponding to the recording material instead of the ink, and the liquid is ejected. It is included in a recording apparatus for recording by attaching to the recording medium.

  Further, as the liquid ejecting head, in addition to the recording head described above, a color material ejecting head used for manufacturing a color filter such as a liquid crystal display, an electrode material used for forming an electrode such as an organic EL display or a surface emitting display (FED). (Conductive paste) A jet head, a bio-organic matter jet head used for biochip manufacturing, a sample jet head for jetting a sample as a precision pipette, and the like.

As shown in FIGS. 1 and 2, the printer 1 includes a feeding unit 10, a recording unit 20, and a discharge unit 40. Among these, the feeding unit 10 is provided so as to be able to feed the ejection medium and the roll paper R which is an example of the recording medium to the recording unit 20.
Specifically, the roll medium holder 11 is provided, and the roll medium holder 11 holds the roll-shaped roll paper R. Then, by rotating the roll-shaped roll paper R, the roll paper in a state in which the roll state is released via the first roller 12 to the recording unit 20 on the downstream side in the feeding direction (conveying direction; arrow direction of the Y axis). It is configured so that R can be fed.
In the present embodiment, the roll paper R will be described as an example of the recording medium, but it is needless to say that a cut sheet or a film material may be used.

Further, the recording unit 20 is provided so as to perform recording by ejecting ink, which is an example of a liquid (fluid), to the roll paper R sent from the feeding unit 10.
Specifically, it includes a platen 24 that is a medium support portion, a carriage 21, a recording head 22, and a curl pressing unit 30. Among these, the platen 24 is provided so that the roll paper R can be supported from the back surface on the support surface (medium transport surface) 24a.

The carriage 21 faces the platen 24 and is provided so as to be moved in the feed direction Y of the roll paper R by the power of a carriage motor (not shown) while being guided by a first guide shaft (not shown). .
FIG. 1 shows a state where the platen 24 is retracted to the upstream side in the feed direction. The carriage 21 is provided so as to be movable upstream of the platen 24 so that the operator can easily attach and remove the curl pressing member 31 and move it in the width direction X, which will be described later. is there.

  The recording head 22 is provided on the carriage 21 so as to be able to move integrally with the carriage 21 in the feed direction Y. Further, the recording head 22 is configured to be able to move relative to the carriage 21 in the X direction, which is the width direction of the roll paper R. Specifically, it is provided so that it can be moved in the width direction X by the power of a recording head motor (not shown) while being guided by a second guide shaft (not shown). That is, the recording head 22 is configured to be able to move two-dimensionally in the feed direction Y and the width direction X within a range facing the platen 24. Then, by ejecting ink from the nozzle row 23 provided on the surface of the recording head 22 facing the platen 24, the recording process for the roll paper R can be executed.

  Further, the platen 24 is provided with a suction means 28, a pressure chamber 27, a plurality of suction holes 26, 26... And a heating means 25. Among these, the suction means 28 is provided so that the air inside the pressure chamber 27 can be sucked into a negative pressure. Specifically, an axial flow fan 29 is provided as an example, and the axial flow fan 29 is configured to suck air inside the pressure chamber 27.

Further, the pressure chamber 27 is connected to a plurality of suction holes 26, 26... Provided vertically above (the Z-axis arrow direction), which is the side of the platen 24 that supports the roll paper R. Accordingly, the air above the platen 24 can be sucked by the suction of the suction means 28 through the plurality of suction holes 26, 26.
In the present embodiment, the suction holes 26, 26... Are provided in the entire region of the platen 24. However, at least in the range facing the opposite side ends R1, R1 of the roll paper R and the pair of curl pressing members 31, 31. What is necessary is just to provide.

  The heating means 25 is provided so that the roll paper R on the platen 24 can be heated. This is for accelerating the drying of the ink that has landed on the surface of the roll paper R as the recording is performed. Specifically, it has a nichrome wire 25a as an example. The nichrome wire 25a is arranged inside the entire area of the platen 24 so as to be a certain distance from the upper surface of the platen 24. When energized, the nichrome wire 25 a itself generates heat, and heat can be conducted to the back surface of the roll paper R on the platen 24 that is in contact with the platen 24.

  Here, since the nichrome wire 25 a is provided in the entire region of the platen 24, heat can be generated in the entire region of the platen 24. Since the platen 24 is a smooth surface without unevenness, the upper surface of the platen 24 can be in uniform contact with the roll paper R. Further, the distance from the nichrome wire 25a to the upper surface of the platen 24 is constant. Therefore, heat can be uniformly conducted to the roll paper R on the platen 24. That is, the roll paper R can be warmed uniformly.

  As a result, there is no possibility that the ink may become cloudy or bleed even if so-called overstrike is performed in which the ink is ejected in the same location on the roll paper R. In other words, since the previously ejected ink can be dried by the time when the ink is ejected in layers, there is no possibility that the ink will become cloudy or bleed even if the overstrike is executed. Further, since the ink that has landed on the roll paper R at the time of recording can be dried immediately, the ink on the surface of the roll paper R adheres to the back surface of the preceding roll paper R even if it is taken up by the discharge unit 40 described later. There is no fear of doing it.

  The curl pressing means 30 counters a so-called lifting force, which is a force that curls the side edge R1 of the roll paper R and separates it from the platen 24 by pressing and holding the side edge R1 in the width direction of the roll paper R. To do. And it is comprised so that the floating of the side edge R1 of the roll paper R may be prevented. Specifically, the curl pressing means 30 includes a platen 24, a pair of curl pressing members (holding members) 31, 31 formed as a film of a flexible material, and a plurality of suction holes 26, 26,. And suction means 28.

Specifically, as will be described later, the sealed space A (see FIG. 3A) is configured by the platen 24, the curl pressing members 31, 31 and the roll paper R at the side edge R1 of the roll paper R. Then, the suction means 28 sucks the air inside the sealed space A through the suction holes 26, 26... So that the curl pressing members 31 and 31 press the side edge R1 of the roll paper R from above. Act on.
In the present embodiment, the curl pressing members 31 and 31 are formed in a strip-like thin film shape having flexibility and flexibility. The Young's modulus is 10,000 MPa (megapascal) or less, and the thickness is 0.5 mm or less. Examples of the material include “polyimide”.

FIG. 3 is a cross-sectional view of the platen 24 along the X direction.
As shown in this figure, each curl pressing member 31, 31 has a base portion 51 disposed on the platen 24 at a distance from the roll paper R, and a support surface provided from the base portion 51 on the base portion 51. It has a holding portion 52 that extends onto the sheet 24a, covers the side edge R1 of the roll paper R, and holds the roll paper R between the support surface 24a.

  As shown in FIG. 2, the holding portions 52 in each curl pressing member 31 are cut so that the edge R1 of the roll paper R is uncovered at a position facing the edges on both sides of the platen 24 in the Y direction. A notch 52a having a notch shape is formed.

  As shown in FIGS. 1 and 2, a first curl pressing attachment portion 35 is disposed on the upstream side (−Y side) in the feeding direction (conveying direction) from the platen 24. On the other hand, on the downstream side (+ Y side) in the feed direction from the platen 24, a second curl pressing attachment portion 36 is disposed.

  One end of the pair of curl pressing members 31, 31 is attached to the first curl pressing mounting portion 35 by a fixing pin 37 and a fixing auxiliary member 38. Specifically, when the fixing pin 37 is fitted into the first elongated hole portion 35 a extending in the width direction X in the first curl pressing attachment portion 35, one end of the curl pressing members 31, 31 is X It is attached with the position of the direction adjustable.

On the other hand, the other ends of the pair of curl pressing members 31 and 31 are attached to the second curl pressing attaching portion 36 by the fixing pin 37 and the fixing auxiliary member 38 in the same manner as the one end. The second curl pressing attachment portion 36 is fixed to the base portion 2 of the printer 1.
The other end of the curl pressing member 31 is fitted in a second elongated hole portion 36a extending in the width direction X in the second curl pressing attachment portion 36, so that the position in the X direction is adjusted. It is attached in an adjustable state.

Furthermore, the one end of the pair of curl pressing members 31, 31 is pulled to the upstream side in the feed direction by the pulling device 70.
FIG. 4 is a plan view showing details of main parts of the tensioning device 70, and FIG. 5 is a cross-sectional view showing details of main parts of the tensioning device 70.

  As shown in these drawings, the tensioning device 70 is arranged on the −Y side of the platen 24 and applies tension by pulling the curl pressing member 31. As shown in FIG. It has an L-shaped moving member 71 and a pair of tension springs (biasing members) 72 formed by coil springs.

  The moving member 71 is formed in a plate shape along the XY plane, is movable in the Y direction integrally with the fixing auxiliary member 38 with respect to the first curl pressing attachment portion 35, and is relative to the first curl pressing attachment portion 35. The first wall portion 71a whose movement to the + Y side is restricted by the engaging portion 73 engaged from the -Y side, and the first wall portion 71a is suspended from the -Y end portion to the -Z side, and is The curl pressing attachment portion 35 has a second wall portion 71b disposed opposite to the −Y side with a gap.

  The tension spring 72 is disposed in a state compressed in the Y direction in the gap between the first curl pressing attachment portion 35 and the second wall portion 71b, and biases the second wall portion 71b to the -Y side. Thus, tension is applied to the curl pressing member 31.

  Further, in the printer 1 of the present embodiment, a detection device 75 that detects a tensile force with respect to the curl pressing member 31 is provided. The detection device 75 has a switch portion 75a, and is switched ON / OFF according to the difference between the tensile force applied to the curl pressing member 31 and the biasing force of the tension spring 72, whereby the tensile force applied to the curl pressing member 31 is predetermined. It consists of a switch device that detects whether it is in range.

  The moving member 71 is provided with a pressing wall portion 71c at a position facing the switch portion 75a, and the moving member 71 moves in accordance with the difference between the tensile force on the curl pressing member 31 and the urging force of the tension spring 72. Thus, pressing and pressing release to the switch portion 75a by the pressing wall portion 71c are switched.

  More specifically, when the tensile force against the curl pressing member 31 is in a predetermined range with a magnitude that resists the urging force of the tension spring 72, the moving member 71 moves to the + Y side, and the switch portion 75a is moved by the pressing wall portion 71c. Is pressed to the + Y side, and the detection device 75 is turned on. On the contrary, when the urging force of the tension spring 72 is larger than the tensile force against the curl pressing member 31, the moving member 71 moves to the -Y side and the pressing of the pressing wall portion 71c to the switch portion 75a is released. The detection device 75 is turned off. Thus, the state of the tensile force with respect to the curl pressing member 31 is detected from the detection result by the detection device 75.

The first curl pressing attachment part 35, the second curl pressing attachment part 36, and the tensioning device 70 are disposed outside the platen 24 in the Y direction and below the support surface 24a (on the −Z side).
Therefore, in addition to the tensile force in the Y direction, a force for pressing downward can be applied to the pair of curl pressing members 31, 31. Then, the pair of curl pressing members 31 and 31 can more strongly press the side end R1 of the roll paper R from above. As a result, as will be described later, the outline of the sealed space A (see FIG. 3A) can be configured without a gap. That is, the space can be closed without a gap.
Of course, the other end of the pair of curl pressing members 31, 31 may be pulled downstream in the feed direction.

The roll paper R recorded in the recording unit 20 is sent to the discharge unit 40 via the second roller 13 provided downstream from the platen 24 in the feeding direction.
The discharge unit 40 has a take-up roller 41 and is configured to take up the roll paper R sent from the recording unit 20. The rolled roll paper R is provided such that it can be discharged from the printer 1.

  The control device comprehensively controls the driving of the carriage 21 and the recording head 22, the conveyance of the roll paper R, the driving of the suction unit 28, the heating unit 25, and the like. Further, based on the detection result of the detection device 75 described above, the control device outputs an error when the tensile force of the curl pressing member 31 is out of a predetermined range.

Next, the operation of the curl pressing unit 30 will be described.
FIGS. 3A and 3B are schematic front sectional views showing the operation of the curl pressing means of the present invention. Among these, FIG. 3A is a diagram showing a state in which a sealed space is formed when the curl pressing member is placed on the side edge of the roll paper. On the other hand, FIG. 3B is a diagram showing a state in which the sealed space is substantially eliminated by the suction means and the side edges of the roll paper are not lifted.

  As shown in FIG. 3A, in the state in which the roll paper R is fed onto the platen 24, the operator moves the position of the pair of curl pressing members 31, 31 in the width direction X to the side edge portion of the roll paper R. Set to the position facing R1. Specifically, the fixing pins 37 are loosened and moved in the width direction X in the first elongated hole portion 35a of the first curl pressing attachment portion 35 and in the second elongated hole portion 36a of the second curl pressing attachment portion 36. Let Then, the curl pressing member 31 is disposed on the side end R1 of the roll paper R.

  At this time, among the curl pressing members 31, 31, the base portion 51 is separated from the roll paper R, and the holding portion 52 is disposed so as to cover the side edge R 1 of the roll paper R. Thereafter, the fixing pins 37 are fastened and fixed.

At this time, the side edge R1 of the roll paper R is heated by the heating means 25 and tends to curl. Therefore, the side end R1 curls so as to float upward.
Therefore, the holding portion 52 of the pair of curl pressing members 31 and 31 is placed on the side edge portion R1 of the roll paper R, and the triangle is viewed from the feeding direction Y by the platen 24, the vicinity of the side edge R1 of the roll paper R, and the holding portion 52. The closed space A is configured.

That is, it is a closed triangular sealed space A with the platen 24 as the bottom, the vicinity of the side edge R1 of the roll paper R as one oblique side, and the holding portion 52 as the other oblique side.
Here, as described above, since the downward pressing force acts on the pair of curl pressing members 31, 31, one side end E 1 of the pair of curl pressing members 31, 31 is connected to the platen 24. At least in line contact. Similarly, the surface on the other side end E2 side of the pair of curl pressing members 31, 31 can be at least line-contacted with the side edge R1 of the roll paper R.

Further, the plurality of suction holes 26, 26... Are provided in the region on the platen 24 at least in the region facing the side edges R 1 and R 1 of the roll paper R and the curl pressing members 31 and 31. Therefore, the suction means 28 can suck the air in the sealed space A through the suction holes 26, 26.
As shown in FIG. 3B, when the air in the sealed space A is sucked through the suction holes 26, 26,..., The inside of the sealed space A becomes negative pressure. Therefore, both side edges R 1 and R 1 of the roll paper R and the pair of curl pressing members 31 and 31 are in close contact with the support surface 24 a of the platen 24. That is, the roll paper R is sucked and held on the support surface 24a of the platen 24 including the side edge portion R1 (holding step).

At this time, the “force to press down” the roll paper R is a product of “suction force” and “space surface area”. Here, “suction force” refers to the pressure that the suction means 28 sucks through the suction holes 26, 26. The “space surface area” refers to an area where the air in the sealed space A contacts the curl pressing member 31 and the vicinity of the side edge R1 of the roll paper R.
Accordingly, the side edge R1 of the roll paper R can be pressed with a large force as compared with the configuration without the curl pressing member 31. As a result, it is possible to sufficiently counter the lifting force of the roll paper R, and the side edges R1 and R1 of the roll paper R can be brought into close contact with the platen 24. That is, as a result, the floating can be prevented.

  Here, if the lifting force of the side edges R1, R1 of the roll paper R gradually increases and acts to push up the pair of curl pressing members 31, 31, the sealed space A becomes large again. Although it is about to form, negative pressure acts very strongly. Therefore, once the sealed space A disappears as shown in FIG. 3B, there is almost no possibility that the side edges R1 and R1 of the roll paper R will float unless the suction means 28 is turned off.

  Further, the end portions of the curl pressing members 31, 31 are applied with a tensile force in the Y direction, and the first curl pressing mounting portion 35, the second curl pressing mounting portion 36, and the tensioning device 70 are outside the Y direction of the platen 24. Since the curling pressing members 31 and 31 are pressed downward in addition to the tensile force in the Y direction, the roll paper R and the roll paper R and In both of the curl pressing members 31 and 31, the floating in which the intermediate portion in the Y direction is displaced upward is suppressed.

  Therefore, there is almost no possibility that the pair of curl pressing members 31, 31 come into contact with the moving recording head 22. In addition, there is almost no possibility that the recording head 22 is damaged by the contact. Here, since the curl pressing members 31 and 31 are formed of a flexible material as described above, even if the curl pressing members 31 and 31 are in contact with the recording head 22, there is little possibility that the recording head 22 is damaged.

  Further, the curl pressing member 31 has the roll paper R at a position facing the edges on both sides in the Y direction of the platen 24 where the load on the roll paper R is the largest when the curl pressing members 31 and 31 are pulled obliquely downward. Therefore, the roll paper R positioned at this location is not subjected to the pressing force by the curl pressing member 31. Therefore, in this embodiment, when the roll paper R has a two-layer structure such as a label paper and has an adhesive such as glue, the adhesive protrudes and adheres to the platen 24 by the pressing force, and the roll paper R Can be avoided.

  In addition, in this embodiment, since the tensile force to the curl pressing member 31 is detected by the detection device 75, it is possible to constantly monitor whether the tensile force to the curl pressing member 31 is maintained at an appropriate value. In addition, the stable holding state on the roll paper R can be continued, and when any abnormality occurs in the pulling force on the curl pressing member 31, a recovery operation can be performed quickly.

Depending on the material of the curl pressing member 31, a sufficient pressing force to the curl pressing member 31 can be secured, or the first curl pressing mounting portion 35, the second curl pressing mounting portion 36, the tension device 70, the detection device 75, When there is a sufficient distance from the recording head 22, the first curl pressing attachment portion 35, the second curl pressing attachment portion 36, the tension device 70, and the detection device 75 are arranged on the same plane as the curl pressing member 31 (XY). It is also possible to adopt a configuration in which they are arranged on a plane.
In this configuration, it is possible to constantly monitor whether the tensile force along the Y direction is maintained at an appropriate value, and a stable holding state on the roll paper R can be maintained, and the tension on the curl pressing member 31 can be maintained. When any abnormality occurs in the force, the recovery work can be performed quickly.

  As described above, the preferred embodiments according to the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the examples. Various shapes, combinations, and the like of the constituent members shown in the above-described examples are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

  For example, in the above embodiment, the heating means 25 has a heat conduction type (also referred to as a contact type) structure, but may be a convection type. Here, the “heat conduction type” means a method of transferring heat from the high temperature part to the low temperature part through the inside of the object. That is, this is a system in which heat is conducted to the roll paper side when a high-temperature object comes into contact with the roll paper. The “convection type” refers to a method of transferring heat by a fluid such as gas or liquid.

  Moreover, in the said embodiment, although it was set as the structure which provides the detection apparatus 75 only in the one end side of the curl pressing member 31, it is not limited to this, The structure provided in both ends may be sufficient.

  DESCRIPTION OF SYMBOLS 1 ... Inkjet printer (recording apparatus) 24 ... Platen (medium support part), 24a ... Support surface (medium conveyance surface), 31 ... Curl pressing member (holding member), 70 ... Tension device, 72 ... Tension spring (biasing) Member), 75 ... detection device, R ... roll paper (recording medium), R1 ... side edge

Claims (7)

A medium support for supporting the medium on a flat surface;
A pair of holding members that are arranged to face the medium support portion and hold the medium so as to cover an end portion in a direction perpendicular to the conveyance direction of the medium,
The medium support part is provided with a suction hole for adsorbing and holding the medium,
The pair of holding members has a first distance in which a distance between a medium holding surface for holding the medium and the flat surface in the medium support portion is a constant distance, and an outer side end in the orthogonal direction. A recording apparatus, wherein an inner side edge can take a second distance that is larger than the first distance from the flat surface in contact with the flat surface. A medium support for supporting the medium on a flat surface;
  A pair of holding members that are arranged to face the medium support part and cover the end in a direction perpendicular to the conveyance direction of the medium and hold the medium;
  A tensioning device for pulling the pair of holding members in the transport direction;
With
  The tensioning device is disposed at a position opposite to the pair of holding members across the flat surface with respect to a direction orthogonal to the flat surface outside the transport direction with respect to the medium support unit.
  The pair of holding members has a first distance in which a distance between a medium holding surface for holding the medium and the flat surface in the medium support portion is a constant distance, and an outer side end in the orthogonal direction. A recording apparatus, wherein an inner side edge can take a second distance that is larger than the first distance from the flat surface in contact with the flat surface. The length in the transport direction of the medium in the flat surface, the recording apparatus according to claim 1 or 2, characterized in longer than the length in the direction perpendicular to the conveying direction of the medium in the flat surface. The recording apparatus according to any one of claims 1 to 3, wherein the pair of holding members include a band-like portion extending in a conveyance direction of the medium with a certain width. It said pair of at least one holding member, recording apparatus according to any one of claims 1 to 4, characterized in that it is movable in a direction perpendicular to the conveying direction of the medium. The pair of holding members, the recording apparatus according to any one of claims 1 to 5, characterized in that it is formed of a flexible material. The recording apparatus according to claim 1, wherein the medium support unit is provided with a heating unit that heats the medium support unit.

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