JP5708328B2 - Belt-shaped medium unwinding and winding device and recording device - Google Patents

Description

  The present invention relates to a belt-shaped medium unwinding / winding device and a recording device.

Conventionally, a winding device for a recording device for winding a long drawing medium such as roll paper used in a large recording device has been disclosed (see Patent Document 1). In the winding device for a recording device of the same document, a tension roller extending in the horizontal direction is supported on the discharge path of the printed drawing medium so as to be movable in the front-rear direction and pressed against the back surface of the drawing medium. Apply tension to the media.
Further, the recording apparatus winding apparatus includes a detection sensor that detects a position of a flag that swings according to the swing of the tension roller, and a controller that controls driving of the winding motor based on a signal of the detection sensor. ,have.

  For this reason, when the tension roller moves forward by a predetermined amount according to the feed amount of the drawing medium from the grip portion, the winding scroll roller starts winding. Further, when the tension roller moves backward by a predetermined amount due to the pressure from the drawing medium, the take-up scroller stops. As a result, the load applied to the drive shaft of the take-up scroller is always constant, and the paper is taken up while applying a constant tension.

JP 2004-107021 A

  However, in the technique of Patent Document 1, since the length of the tension roller is larger than the length of the width of the drawing medium, the tension roller sometimes sways in the direction of the central axis during the conveyance of the drawing medium. In particular, if the arms that support both ends of the tension roller are long, the tension roller is likely to be shaken in the direction of the central axis. For this reason, there has been a problem that the drawing medium meanders and the image quality of the drawing medium is lowered.

  The present invention has been proposed in view of the above-described problems, and the belt-shaped medium unwinding and winding device capable of suppressing the axial deflection of the tension applying member that applies tension to the belt-shaped medium and the axial direction of the tension applying member. An object of the present invention is to provide a recording apparatus capable of recording a high-quality image by suppressing blurring.

  The strip-shaped medium unwinding / winding device according to the present invention is capable of transporting a winding / unwinding section that winds or winds the wound strip-shaped medium, and a non-winding region of the strip-shaped medium. A holding member for holding the belt, a rod-like tension applying member that contacts the belt-like medium spanned between the unwinding and winding unit and the conveying holding unit along the width direction, and the tension applying member. A pair of arm members for supporting the tension applying member so as to be swingable in a direction perpendicular to the central axis direction of the tension applying member while supporting both ends rotatably, and applying tension to the belt-like medium A tension applying mechanism, an oscillating member that is disposed at a distance from an inner surface of at least one of the arm members, and that oscillates with the arm member, and a gap between the arm member and the oscillating member. , Between the arm member and the swing member A fixing member that is arranged to have a first gap reduction member that is arranged on the arm member or the fixing member to reduce a gap between the arm member and the fixing member, and the fixing member or the swinging member. And a second gap reducing member disposed to reduce a gap between the fixing member and the swinging member.

  The belt-like medium is transported by being shifted to a position approaching in the axial direction of the tension applying member with respect to the arm member on which the swing member is disposed.

  The first gap reduction member and the second gap reduction member are attached close to the tension applying member.

  It is provided with a detection part which is arranged on the fixed plate and detects the swing of the swing member.

  The swing member and the detection unit are attached so as to approach the tension applying member.

  A recording apparatus according to the present invention performs a recording process on the belt-shaped medium unwinding / winding device according to any one of the above and the belt-shaped medium wound or wound by the belt-shaped medium unwinding / winding device. And a recording unit.

1 is a perspective view illustrating an appearance of a printer according to an embodiment of the present invention. 2 is a cross-sectional configuration diagram of the printer. FIG. It is a perspective view which shows a tension | tensile_strength provision mechanism. It is a principal part perspective view in a sensor box. It is a principal part perspective view in a sensor box. It is sectional drawing which shows the structure of a lower limit sensor. It is sectional drawing which shows schematic structure of a tension | tensile_strength provision mechanism.

Hereinafter, embodiments of a recording apparatus according to the present invention will be described with reference to the drawings. In each drawing used for the following description, the scale of each member is appropriately changed to make each member a recognizable size.
In the present embodiment, an ink jet printer (hereinafter simply referred to as the printer 1) is exemplified as the recording apparatus according to the present invention.

  FIG. 1 is a perspective view illustrating an appearance of a printer 1 according to an embodiment of the present invention. FIG. 2 is a cross-sectional configuration diagram of the printer 1.

  The printer (recording apparatus) 1 is a large format printer (LFP) that handles a relatively large medium (band-shaped medium) M. The medium M is a belt-like medium having a width of, for example, about 64 inches (Inch), and is formed of, for example, a vinyl chloride film or paper.

  As illustrated in FIG. 2, the printer 1 includes a transport unit 2 that transports the medium M by a roll-to-roll method, and a recording unit that ejects ink (fluid) onto the medium M to record images, characters, and the like. 3 and a heating unit 4 for heating the medium M. Each of these components is supported by the main body frame 5.

The transport unit (band-shaped medium unwinding / winding device) 2 includes an unwinding unit 21 that feeds out the medium M wound in a roll shape, and a winding unit (unwinding winding-up) that winds the medium M that has been sent out in a roll shape. Part) 22 and a conveyance roller pair (conveyance holding part) 23 that holds the medium M in the conveyance path between the unwinding part 21 and the winding part 22 and applies a conveyance force. The unwinding unit 21, the winding unit 22, and the transport roller pair 23 are driven by a motor and a speed reducer (not shown).
Further, the transport unit 2 includes a tension applying mechanism 60 that applies tension to the medium M in the transport path between the transport roller pair 23 and the winding unit 22.

The tension roller 25 of the tension applying mechanism 60 is rotatably supported by arm members 26R and 26L from both ends, and is configured to contact the back surface of the medium M in the width direction (perpendicular to the paper surface in FIG. 2). . The tension roller 25 is formed longer in the width direction than the width of the medium M. The tension roller 25 is provided on the downstream side in the transport direction with respect to the after heater 43 of the heating unit 4.
In addition, although tension roller 25 is comprised with the aluminum pipe in this embodiment, it is not limited to an aluminum pipe.

  The recording unit 3 includes an inkjet head 31 that ejects ink (fluid) to the medium M in a conveyance path on the downstream side of the conveyance roller pair 23, and a carriage 32 that is mounted with the inkjet head 31 and can reciprocate in the width direction. Have. The inkjet head 31 includes a plurality of nozzles, and is configured to eject ink that is selected in relation to the medium M and that requires permeation drying or evaporation drying.

  The heating unit 4 is configured to quickly dry and fix the ink on the medium M by heating the medium M, thereby preventing bleeding and blurring and improving the image quality. The heating unit 4 includes a support member (support surface) that constitutes a part of the conveyance path of the medium M, and supports the medium M by bending the medium M so as to protrude upward between the unwinding units 21 and 22. In addition, the medium M on the support surface is heated.

  The heating unit 4 includes a preheater unit 41 that preheats the medium M on the upstream side in the transport direction from the position where the recording unit 3 is provided, a platen heater unit 42 that heats the medium M at a position facing the recording unit 3, And an after heater 43 that heats the medium M on the downstream side in the transport direction from the position where the recording unit 3 is provided.

The pre-heater unit 41 is dried from the time of ink landing by gradually raising the temperature of the medium M from the normal temperature toward the target temperature (temperature in the platen heater unit 42) by the heater 41a disposed on the back surface of the support member. It is the structure which prompts promptly.
The platen heater unit 42 is configured to cause the ink M to be received by the medium M while maintaining the target temperature by the heater 42a disposed on the back surface of the support member (platen), and to promptly dry the ink from landing. It has become.
The after heater unit 43 raises the temperature of the medium M to a temperature higher than the target temperature by the heater 43a disposed on the back surface of the support member, and quickly dries the ink that has landed on the medium M that has not yet dried. At least before landing by the winding unit 22, the landed ink is completely dried and fixed on the medium M.

FIG. 3 is a perspective view showing the tension applying mechanism 60.
The tension applying mechanism 60 includes a bar-shaped tension roller 25 made of an aluminum pipe, a pair of arm members 26L and 26R for swinging the tension roller 25, and various types of sensors for detecting the swing position of the tension roller 25. And a sensor box 70 having members.

  The tension roller (tension applying member) 25 directly applies tension to the medium M, and is arranged so as to contact the medium M along the width direction of the medium M.

  The arm members 26 </ b> L and 26 </ b> R are a pair of rod-shaped members that are interlocked to support the tension roller 25. The arm members 26L and 26R are made of aluminum square pipes in the present embodiment, but are not limited to aluminum square pipes.

One end of each of the arm members 26L and 26R supports both ends of the tension roller 25 in a state where the tension roller 25 is rotatable. The other ends of the arm members 26L and 26R are supported so as to be swingable (rotatable) about a pair of rotating shafts 88 disposed on the same line.
In the normal state, the tension roller 25 (arm members 26L, 26R) swings within a certain angle range (lower limit angle α1 to upper limit angle α2). The lower limit angle α1 is set to 40 °, for example, and the upper limit angle α2 is set to 50 °, for example.

  The arm members 26 </ b> L and 26 </ b> R rotate in the direction in which the position of the tension roller 25 is lowered around the rotation shaft 88 due to the weight of the tension roller 25. As a result, the tension roller 25 presses the back surface of the medium M and applies a tension according to the tilt angle of the arm members 26L and 26R.

Then, when the medium M is transported by the transport roller pair 23 in a state where the winding unit 22 of the transport unit 2 is stopped, the position of the tension roller 25 is gradually lowered, and the tilt angles (an angle described later) of the arm members 26L and 26R α (see FIG. 5) deviates from a certain angle range (α <α1). In this case, the winding unit 22 is rotated to wind up the medium M. Thereby, the medium M presses the tension roller 25, and the arm members 26L and 26R are rotated in the direction in which the position of the tension roller 25 is pushed up. Then, the tilt angles of the arm members 26L and 26R return to within a certain angle range (α1 ≦ α ≦ α2).
In this way, excessive tension applied to the medium M by the tension roller 25 is prevented.

On the other hand, when the winding of the medium M by the winding unit 22 proceeds, the position of the tension roller 25 is gradually pushed up, and the tilt angles (angle α) of the arm members 26L and 26R deviate from a certain angle range (α2). <Α). In this case, the rotation of the winding unit 22 is stopped. When the medium M is transported again by the transport roller pair 23, the position of the tension roller 25 is lowered and the tilt angles of the arm members 26L and 26R are returned to a certain angle range (α1 ≦ α ≦ α2).
In this way, excessive tension applied to the medium M by the tension roller 25 is prevented.

In this way, by controlling the timing of rotation of the winding unit 22 and the conveyance roller pair 23 of the conveyance unit 2, the tilt angles (angle α) of the arm members 26L and 26R are within a certain angle range (α1 ≦ α ≦ α2) is maintained.
Therefore, the tension applying mechanism 60 (tension roller 25) can apply a certain tension to the medium M.

FIG. 4 is a perspective view of a main part of the sensor box 70. Although the sensor box 70 is covered with a protective cover (not shown), it is omitted in FIG.
The sensor box 70 includes a sensor support plate 76 disposed in parallel to the inner side surface 26La of the arm member 26L, a flag member 81 fixed to the arm member 26L and swinging together with the arm member 26L, have.
The sensor support plate (fixing member) 76 is a plate piece (sheet metal) bent in an L shape, and one surface (horizontal surface 76h) is fixed to the main body frame 5, and the other surface (vertical surface 76v) is vertical. The arm member 26L is arranged in parallel to the inner side surface 26La.
The horizontal surface 76h of the sensor support plate 76 is provided with a rotation shaft fixing portion 72 for fixing the rotation shaft 88 of the arm member 26L, and supports the rotation shaft 88 between the vertical surface 76v.

The vertical surface 76v of the sensor support plate 76 is formed in a semicircular shape (fan shape) with the rotation shaft fixing portion 72 as the center.
The vertical surface 76v of the sensor support plate 76 is provided with a lower limit sensor support portion 77 for supporting the lower limit sensor 91 and an upper limit sensor support portion 78 for supporting the upper limit sensor 92.
In addition, an arc-shaped slit 79 centered on the rotation shaft 88 is formed on the vertical surface 76v of the sensor support plate 76.

The lower limit sensor support portion 77 and the upper limit sensor support portion 78 are members obtained by bending a plate piece (sheet metal) into an L shape.
The lower limit sensor support portion 77 is fixed to the sensor support plate 76 and supports the lower limit sensor 91 so that the lower limit sensor 91 is in a state of sandwiching the upper end portion in the vertical direction of the outer peripheral edge portion of the flag member 81.
The upper limit sensor support portion 78 is fixed to the sensor support plate 76 and supports the upper limit sensor 92 so that the upper limit sensor 92 is in a state of sandwiching the lower end of the outer peripheral edge of the flag member 81 in the vertical direction.

  As described above, the slit 79 is an arc-shaped slit (through hole) centered on the rotation shaft 88. The fixing portion 81 b of the flag member 81 is inserted into the slit 79. When the arm member 26L rotates around the rotation shaft 88, the fixing portion 81b of the flag member 81 fixed to the arm member 26L swings along the slit 79.

  FIG. 5 is a perspective view of a main part in the sensor box 70. In FIG. 5, the illustration of the sensor support plate 76 is omitted, and the arm member 26 </ b> L and the flag member 81 will be mainly described.

A flag member 81 is provided on the arm member 26L. The flag member 81 includes a semi-circular (fan-shaped) flag plate (swing member) 81a arranged in parallel with a gap with respect to the inner surface 26La of the arm member 26L, and a fixing portion for fixing the arm member 26 to the arm member 26. 81b.
Although the flag plate 81a and the fixing portion 81b are integrally formed, the flag plate 81a and the fixing portion 81b may be separately formed and bonded or the like.

  The flag plate 81a is fixed to the arm member 26L via the fixing portion 81b so as to be opposed (opposed) to the inner side surface 26La of the arm member 26L. For this reason, when the arm member 26L swings (rotates) about the rotation shaft 88, the flag plate 81a also swings (rotates) about the rotation shaft 88.

A lower limit sensor (detection unit) 91 and an upper limit sensor (detection unit) 92 are disposed on the outer peripheral edge (arc portion) of the flag plate 81a. Specifically, a lower limit sensor 91 is disposed at one circumferential end (vertical upper side) of the outer peripheral edge of the flag plate 81a, and at the other circumferential end (vertical lower side) of the outer peripheral edge. An upper limit sensor 92 is arranged.
The lower limit sensor 91 and the upper limit sensor 92 are provided so as to sandwich the outer peripheral edge of the flag plate 81a from both sides without contacting the flag plate 81a.

  FIG. 6 is a cross-sectional view showing the configuration of the lower limit sensor 91. Since the upper limit sensor 92 has the same configuration as the lower limit sensor 91, detailed description thereof is omitted.

The lower limit sensor 91 includes a light emitting unit 91a that emits light, and a light receiving unit 91b that is disposed facing the light emitting unit 91a and receives light from the light emitting unit 91a. There is a gap between the light emitting unit 91a and the light receiving unit 91b so that the outer peripheral edge of the flag plate 81a can be inserted without contacting.
The lower limit sensor 91 emits light from the light emitting unit 91a and outputs a signal corresponding to the light detected by the light receiving unit 91b. Thus, by determining the signal output from the lower limit sensor 91, it can be determined whether or not the flag plate 81a exists between the light emitting unit 91a and the light receiving unit 91b.

  As shown in FIG. 5, the angle formed by the longitudinal direction of the arm member 26L (arm member 26R) with respect to the horizontal plane 76h of the sensor support plate 76 is defined as α. When the angle α is within a certain angle range (α1 ≦ α ≦ α2), the outer peripheral edge of the flag plate 81a exists at a position detected by both or one of the lower limit sensor 91 and the upper limit sensor 92. .

When the position of the tension roller 25 is lowered and the angle α is smaller than the lower limit angle α1 (α <α1), the flag plate 81a is detected only by the upper limit sensor 92 and is not detected by the lower limit sensor 91.
On the other hand, when the position of the tension roller 25 rises and the angle α becomes larger than the upper limit angle α2 (α2 <α), the flag plate 81a is not detected by the upper limit sensor 92 and is detected only by the lower limit sensor 91.

Thus, based on the detection results of the upper limit sensor 92 and the lower limit sensor 91, it is determined whether the tilt angle (angle α) of the arm member 26L (arm member 26R) is appropriate (is within a certain angle range). can do.
The arm members 26L and 26R are maintained so that the tilt angles (angle α) are within a certain angle range (α1 ≦ α ≦ α2), whereby the tension applying mechanism 60 (tension roller 25) applies the force to the medium M. Tensioning can be made constant (stable).

The tension roller 25 can be lifted to a position (upper limit) where the tilt angle (angle α) of the arm member 26L (arm member 26R) is significantly larger than the upper limit angle α2. The tilt angle (angle α) of the arm member 26L when the tension roller 25 is retracted to the upper limit position is, for example, 95 °.
This is because when the user takes up the roll-shaped medium M from the take-up unit 22 after being taken up by the take-up unit 22, the tension roller 25 is retracted to a position that does not interfere with the work. The retracting operation of the tension roller 25 is manually performed by the user.
As described above, when the tension roller 25 is retracted, the flag plate 81 a is not detected by both the upper limit sensor 92 and the lower limit sensor 91.
On the other hand, the lower limit of the tilt angle (angle α) of the arm member 26L is set to a position where the flag plate 81a is always detected by the upper limit sensor 92.

  Then, the rotation (swing) of the arm member 26L (arm member 26R) is forcibly stopped on the tip side (the tension roller 25 side of the sensor support plate 76) on the inner side surface 26La of the arm member 26L (arm member 26R). A mechanical stopper 28 is provided. When the tilt angle (angle α) of the arm member 26L (arm member 26R) reaches the lower limit or the upper limit, the mechanical stopper 28 comes into contact with the outer peripheral edge (arc portion) of the sensor support plate 76 and the tension roller 25 (arm The swing of the member 26L) is restricted.

FIG. 7 is a cross-sectional view showing a schematic configuration of the tension applying mechanism 60.
A first pad 96 having a thickness smaller than the gap between the sensor support plate 76 and the arm member 26L is provided on the inner side surface 26La of the arm member 26L facing (opposing) the sensor support plate 76. The gap between the first pad 96 and the sensor support plate 76 is set to about 0.5 mm to 1 mm, for example.
A second pad 97 having a thickness smaller than the gap between the sensor support plate 76 and the flag plate 81a is provided on the flag plate 81a facing (opposing) the sensor support plate 76. The gap between the second pad 97 and the sensor support plate 76 is set to about 0.5 mm to 1 mm, for example.
The first pad 96 (first gap reduction member) and the second pad (second gap reduction member) 97 are arranged so as to overlap each other in the rotation axis (center axis) direction of the tension roller 25. That is, the first pad 96 and the second pad 97 are provided so as to sandwich the flag plate 81a from both sides.
Thus, the first pad 96 functions to reduce (fill) the gap between the arm member 26L and the sensor support plate 76. The second pad 97 functions to reduce (fill) the gap between the flag plate 81a and the sensor support plate 76.

The first pad 96 and the second pad 97 are formed to have a constant thickness using a wear-resistant material such as polyacetal (POM).
Polyacetal (POM) is used as the first pad 96 and the second pad 97 when the first pad 96 and the second pad 97 are in contact with the sensor support plate 76 of the arm member 26L (tension applying mechanism 60). This is to prevent the rocking (rotation) from being disturbed as much as possible.
When a material that does not hinder the swing (rotation) of the arm member 26L (tension applying mechanism 60) is used, the first pad 96 and the second pad 97 may always be in contact with the sensor support plate 76, respectively.

  As described above, the tension roller 25 is configured to be sufficiently longer than the width of the medium M. The medium M is not arranged symmetrically from the center position of the tension roller 25 but is arranged so that one side in the width direction of the medium M is always at a predetermined position (home position HP) of the tension roller 25. .

When the medium M is conveyed in a biased state (arrangement) toward one side (the side where the flag member 81 is provided) of the tension roller 25, the tension roller 25 is biased from the medium M in the direction of the central axis (reverse force). Power). That is, a reaction force is applied to the tension roller 25 only in the region that contacts the medium M.
As described above, when a biased force is applied to the tension roller 25 in the central axis direction, the tension roller 25 (and the arm members 26L and 26R) are moved toward the central axis direction (direction orthogonal to the transport direction). Force is generated.

  However, the first pad 96 is provided on the arm member 26L, and the second pad 97 is provided on the flag plate 81a. For this reason, the positional deviation of the tension roller 25 in the central axis direction can be minimized. That is, even if the tension roller 25 (and the arm members 26L and 26R) moves in the central axis direction, the first pad 96 or the second pad 97 contacts the sensor support plate 76. And since the clearance gap between the 1st pad 96, the 2nd pad 97, and the sensor support plate 76 is about 0.5 mm-1 mm, the position shift of the center axis direction of the tension roller 25 is suppressed to the minimum.

  As described above, the printer 1 can prevent the tension roller 25 from being displaced in the axial direction, and can transport the medium M while preventing meandering. Therefore, image formation on the medium M by the recording unit 3 can be performed with high accuracy.

As described above, since the medium M is offset to the tension roller 25, the force in the central axis direction generated on the tension roller 25 is likely to be generated on the home position HP side. For this reason, a mechanism (the first pad 96, the second pad 97, etc.) for suppressing the axial displacement of the tension roller 25 is disposed at the base of the arm member 26L disposed on the home position HP side of the medium M. Is preferred.
Thereby, the position shift of the axial direction of the tension roller 25 can be suppressed effectively.

  In addition, it is preferable that the attachment positions of the first pad 96 and the second pad 97 are arranged as far as possible from the rotation shaft 88. In other words, the first pad 96 and the second pad 97 are preferably attached closer to the tension roller 25. Thereby, the position shift of the axial direction of the tension roller 25 can be suppressed effectively.

  Further, since the mechanism for suppressing the axial displacement of the tension roller 25 also serves as the sensor box 70 for detecting the swing (rotation) of the existing tension roller 25 (arm member 26L), the first pad 96, By only providing the second pad 97, the axial displacement of the tension roller 25 can be suppressed.

In addition, it is preferable that the mounting positions of the peripheral edge of the flag plate 81a, the lower limit sensor 91, and the upper limit sensor 92 be as far as possible from the rotary shaft 88. In other words, it is preferable that the circumferential edge of the flag plate 81a, the lower limit sensor 91, and the upper limit sensor 92 are attached closer to the tension roller 25.
Thereby, in the swing detection of the tension roller 25, the influence of variation in the mounting accuracy of these components is reduced. Accordingly, the tension variation (error) applied to the medium M by the tension roller 25 can be reduced.

  In the present embodiment, the first pad 96 is provided on the arm member 26L and the second pad 97 is provided on the flag plate 81a. However, the present invention is not limited to this. The first pad 96 may be provided on the sensor support plate 76 facing the arm member 26L. Further, the second pad 97 may be provided on the sensor support plate 76 facing the flag plate 81a. In these cases, the shapes of the first pad 96 and the second pad 97 need to be fan-shaped.

In this embodiment, it is not restricted to attaching the 1st pad 96 and the 2nd pad 97 which are separate bodies with respect to the arm member 26L and the flag board 81a. A part of the arm member 26L, the flag plate 81a, or the sensor support plate 76 may be protruded, and the protruding portion may function in the same manner as the first pad 96 and the second pad 97. That is, the first pad 96 and the second pad 97 do not need to be different members from the arm member 26L and the flag plate 81a, and may be integrally formed as a part of the arm member 26L and the flag plate 81a.
This makes it possible to reduce manufacturing costs.

  That is, the first pad 96 and the second pad 97 only need to function so as to reduce (fill) the gap between the arm member 26L and the sensor support plate 76 and the gap between the flag plate 81a and the sensor support plate 76, respectively.

  The tension applying mechanism 60 is not limited to applying tension to the medium M using the weight of the tension roller 25. A coil spring or the like may be provided between the arm members 26L and 26R and the main body frame 5, and the tension roller 25 may be biased toward the medium M by the coil spring or the like.

  The tension applying mechanism 60 is not limited to the case where the tension applying mechanism 60 is disposed on the conveyance path between the conveyance roller pair 23 and the winding unit 22. You may arrange | position in the conveyance path | route between the conveyance roller pair 23 and the unwinding part 21. FIG. Moreover, you may arrange | position the tension | tensile_strength provision mechanism 60 between the conveyance roller pair 23 and the unwinding part 21, and between the conveyance roller pair 23 and the winding-up part 22, respectively.

  In this embodiment, the case where the recording apparatus is the printer 1 has been described as an example, but the present invention is not limited to this. It may be an apparatus such as a copying machine or a facsimile.

  Further, as the recording apparatus, a recording apparatus that ejects or discharges fluid other than ink may be employed. The present invention can be applied to various recording apparatuses including, for example, a recording head that discharges a minute amount of liquid droplets. The droplet means a state of the liquid ejected from the recording apparatus, and includes a liquid having a granular shape, a tear shape, or a thread shape. The liquid here may be any material that can be ejected by the recording apparatus. For example, it may be in a state in which the substance is in a liquid phase, such as a liquid with high or low viscosity, sol, gel water, other inorganic solvents, organic solvents, solutions, liquid resins, liquid metals (metal melts ) And a liquid as one state of a substance, as well as a material in which particles of a functional material made of a solid such as a pigment or metal particles are dissolved, dispersed or mixed in a solvent. A typical example of the liquid is ink as described in the above embodiment. Here, the ink includes general water-based inks and oil-based inks, and various liquid compositions such as gel inks and hot melt inks. The recording medium includes, in addition to plastic films such as paper and vinyl chloride films, functional paper that is thin and thermally stretched, a substrate, a metal plate, and the like.

  DESCRIPTION OF SYMBOLS 1 ... Printer (recording apparatus), 2 ... Conveyance part (band | belt-shaped medium winding-up winding apparatus), 3 ... Recording part, 22 ... Winding-up part (unwinding winding-up part), 23 ... Conveying roller pair (conveyance holding part) 25 ... tension roller (tension applying member), 26R, 26L ... arm member, 60 ... tension applying mechanism, 76 ... sensor support plate (fixing member), 81a ... flag plate (swing member), 91 ... lower limit sensor (detection) Part), 92 ... upper limit sensor (detection part), 96 ... first pad (first gap reduction member), 97 ... second pad (second gap reduction member), M ... medium (band-like medium)

Claims (6)

An unwinding / winding unit for unwinding the wound belt-shaped medium or winding and winding the belt-shaped medium;
A transport holding unit for holding the non-winding region of the belt-shaped medium so as to be transportable;
While supporting the rod-like tension applying member contacting the strip-shaped medium spanned between the unwinding and winding unit and the conveyance holding unit along the width direction and both ends of the tension applying member rotatably. A tension applying mechanism that includes a pair of arm members that swingably support the tension applying member in a direction orthogonal to a central axis direction of the tension applying member, and applies tension to the belt-like medium;
An oscillating member that is disposed at an interval with respect to at least one inner surface of the arm member and oscillates together with the arm member;
A fixing member disposed in a gap between the arm member and the swinging member with a space from the arm member and the swinging member;
A first gap reduction member disposed on the arm member or the fixing member to reduce a gap between the arm member and the fixing member;
A second gap reduction member disposed on the fixing member or the swinging member to reduce a gap between the fixing member and the swinging member;
A belt-shaped medium unwinding / winding device comprising:   2. The belt-like medium according to claim 1, wherein the belt-like medium is transported by being shifted to a position approaching in the axial direction of the tension applying member with respect to the arm member on which the swing member is disposed. Unwinding and winding device.   The belt-shaped medium unwinding and winding device according to claim 1 or 2, wherein the first gap reduction member and the second gap reduction member are attached close to the tension applying member.   The belt-shaped medium unwinding / winding device according to any one of claims 1 to 3, further comprising a detection unit that is disposed on the fixed plate and detects a swing of the swing member.   The belt-shaped medium unwinding and winding device according to claim 4, wherein the swinging member and the detection unit are attached so as to approach the tension applying member. A belt-shaped medium unwinding and winding device according to any one of claims 1 to 5,
A recording unit that performs a recording process on the belt-shaped medium that is unwound from or wound on the belt-shaped medium unwinding device;
A recording apparatus comprising:

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