JP5018720B2 - Media transport mechanism and media processing apparatus provided with the same - Google Patents

Description

The present invention relates to a media transport mechanism for transporting a disk-shaped medium such as a CD or a DVD, and a media processing apparatus including the same.

In recent years, disk dubbing devices that write data to a large number of media such as blank CDs and DVDs, and media processing devices such as CD / DVD publishers that can produce and issue media by performing data writing and label printing are used. It is being As this type of media processing apparatus, there are known a drive that writes data to the media, a printer that prints on the label surface of the media, and a media transport mechanism that grips and transports the media to these drives and printers. (For example, refer to Patent Document 1).

JP 2006-202379 A

By the way, blank media before processing such as writing is accommodated in a stacked state inside the media stacker, but the media and stacker accommodated in the stacker are provided with a slight clearance in the radial direction of the media. It has become. Therefore, since the media stacked in the stacker are randomly accommodated in the stacker, the center position of the media is accommodated slightly shifted from the media pickup center by the media transport mechanism. in this case,
When gripping the inner peripheral surface of the center hole of the media with the grip of the gripping part of the media transport mechanism, the grip force is biased in the circumferential direction, and the media cannot be gripped in a balanced manner. May occur.

In the stacker, the upper and lower media may be in close contact with each other, resulting in sticking force.
If the gripping force is biased, it is difficult to reliably lift only the uppermost one medium.
For example, the media transport mechanism is provided with a positioning guide that gradually narrows toward the tip, and even if this guide is inserted into the center hole of the media, the media does not slide to the side, and the center of the media is positioned at the pickup center. It becomes difficult. Therefore, when gripping the inner peripheral surface of the center hole of the media, the gripping force is biased in the circumferential direction, and the media cannot be gripped in a well-balanced manner, and gripping failure may occur.
In this case, it is conceivable to increase the insertion force of the positioning guide by increasing the pressing force of the gripping portion to the medium. In this case, in the drive tray that accommodates one piece of media, the pressing force of the gripping portion is considered. A large load is applied to the tray to be moved with high accuracy by pressure, which not only affects the moving accuracy, but also may damage the moving mechanism of the tray.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a media transport mechanism capable of reliably positioning and gripping a media to be gripped with an appropriate force regardless of the state of storage of the media to be gripped, and a media processing apparatus including the media transport mechanism. There is to do.

The media transport mechanism according to the present invention capable of solving the above-mentioned problems is formed of a gripping mechanism for gripping the center hole of the media from the inner peripheral side, and a shape in which the outer diameter gradually decreases toward the tip, A gripping portion having a media guide for positioning the center of the media at the center of the gripping mechanism by being inserted into the center hole; and an inner periphery of the center hole of the media immediately below the uppermost media gripped by the gripping portion a media transportation mechanism arranged a movable lever having a working piece to move the media directly under contact the to the top of the media surface, a vertically movable transfer arm, the gripper When the uppermost medium is gripped, the uppermost medium is held in a pressed state, and the lever is held after the uppermost medium is gripped. Is projected to said working piece outside of the media guide, characterized in that moving the media directly under the.

According to the media transport mechanism having this configuration, when the transport arm is lowered, the gripper can position the media with the media guide and grip the media with the gripping mechanism. In addition, when positioning and gripping the uppermost medium of the stacked media in the stacker in which the adhering force is brought into close contact with the media immediately below, the gripping portion can be pressed against the uppermost medium. After that, the lever moves the media immediately below after the uppermost media is gripped. Therefore, even if the lever is stuck to the media to be lifted and the second media is likely to be lifted, It is possible to lift only the top media by reliably kicking down the media.
Further, the grip portion selectively selects either the first elastic pressing force or the second elastic pressing force larger than the first elastic pressing force according to the state of accommodation of the medium to be gripped. It is preferable to act on the top media.

  In addition, it is preferable that the second elastic pressing force is applied to the uppermost medium when the uppermost medium is transported from a place where a plurality of the media are stacked.

The first elastic pressing force is preferably applied to the single medium when the single medium is transported from a place where the single medium is held.

A media processing apparatus according to the present invention includes any one of the media transport mechanisms described above.
According to the media processing device having this configuration, since the media transport mechanism capable of reliably positioning and gripping the media is provided, a processing device with high processing reliability can be provided.

Embodiments of a media transport mechanism and a media processing apparatus including the media transport mechanism according to the present invention will be described below with reference to the drawings.
In the present embodiment, a case where the present invention is applied to a media processing apparatus including a publisher will be described as an example.
1 is an external perspective view of the publisher (media processing apparatus), FIG. 2 is a front perspective view of the publisher with the case removed, and FIG. 3 is a rear perspective view of the publisher with the case removed. FIG. 3 is a perspective view of a label printer portion installed in a publisher.

The publisher 1 is a media processing apparatus that writes data on a disk-shaped medium such as a CD or DVD and prints on the label surface of the medium, and includes a substantially rectangular parallelepiped case 2. Opening and closing doors 3 and 4 that can be opened and closed to the left and right are attached to the front surface of the case 2. An operation surface 5 on which display lamps, operation buttons, and the like are arranged is provided at the upper left end of the case 2, and a media discharge port 6 is provided at the lower end of the case 2.

The open / close door 3 on the right side of the front view is a door that opens and closes when an unused blank medium MA is set or when a created medium MB is taken out.
The open / close door 4 on the left side when viewed from the front is for opening and closing when the ink cartridge 12 of the label printer 11 is replaced. When the open / close door 4 is opened, the open / close door 4 has a plurality of cartridge holders 13 arranged in the vertical direction. The cartridge mounting portion 14 (see FIG. 2) is exposed.

As shown in FIG. 2, a blank media stacker 21 as a media storage unit capable of stacking a plurality of unused blank media MA that has not been subjected to data writing processing is provided in the case 2 of the media processing device 1. Then, the created media stacker 22 as a media storage unit in which the created media MB is stored is arranged vertically in a coaxial state. The blank media stacker 21 and the created media stacker 22 are detachable from the predetermined positions shown in FIG.

The blank media stacker 21 includes a pair of left and right arc-shaped frame plates 24 and 25.
Thereby, the blank medium MA is received from the upper side, and it has the structure which can be accommodated in the state laminated | stacked coaxially. The operation of storing or replenishing the blank media MA in the blank media stacker 21 can be easily performed by opening the door 3 and taking out the stacker.

The created media stacker 22 on the lower side has the same structure, and includes a pair of left and right arc-shaped frame plates 27 and 28, thereby receiving the created media MB from the upper side,
A stacker is configured that can be stored in a state of being stacked coaxially.

Further, the created media MB (that is, the medium on which data writing and label surface printing have been completed) can be taken out from the open / close door 3.

A media transport mechanism 31 is disposed behind the blank media stacker 21 and the created media stacker 22. The media transport mechanism 31 has a vertical guide shaft 35 that is vertically stretched between a horizontal support plate portion 34 attached to the base 72 and the top plate 33 of the chassis 32 (see FIG. 5). . The vertical guide shaft 35 is connected to the transfer arm 3.
6 is supported in a state in which it can be raised and lowered. The transport arm 36 can be moved up and down along the vertical guide shaft 35 by a drive motor 37 and can be swung left and right about the vertical guide shaft 35. The media transported to the media discharge port 6 by the media transport mechanism 31 can be taken out from the media discharge port 6.

Two media drives 41 that are stacked one above the other are disposed on the sides of the upper and lower stackers 21 and 22 and the media transport mechanism 31, and a carriage 62 (described later) of the label printer 11 is disposed below these media drives 41. 4) is movably arranged.
The media drive 41 has media trays 41a that can move between a data writing position on the media and a media delivery position for receiving and delivering media.

Further, the label printer 11 has a media tray 51 that can move between a label printing position on the label surface of the media and a media delivery position for receiving and delivering the media.

2 and 3, the media tray 41a of the upper media drive 41 is pulled out to the front and is in the media delivery position, and the media tray 51 of the lower label printer 11 is in the back label printable position. It is shown. The label printer 11 is an ink jet printer, and ink cartridges 12 of various colors (black, cyan, magenta, yellow, light cyan, and light magenta in this embodiment) are used as the ink supply mechanism 71, and these ink cartridges are used. 12 is mounted on each cartridge holder 13 of the cartridge mounting section 14 from the front.

Here, between the pair of left and right frame plates 24 and 25 of the blank media stacker 21 and between the pair of left and right frame plates 27 and 28 of the created media stacker 22, the transport arm 36 of the media transport mechanism 31 can be raised and lowered. A gap is formed. Further, there is a gap between the upper and lower blank media stackers 21 and the created media stacker 22 so that the transport arm 36 of the media transport mechanism 31 can be rotated horizontally and positioned directly above the created media stacker 22. Is open. Further, when the media tray 41a is pushed into the media drive 41, the transport arm 36 of the media transport mechanism 31 is lowered to access the media tray 51 at the media delivery position. Therefore, the media can be transported to each part by a combined operation of raising and lowering the transport arm 36 and turning left and right.

A disposal stacker 52 for storing the disposal media MD is disposed below the media delivery position of the media tray 51. The disposal stacker 52 includes, for example, 3
About zero disposal media MD can be stored. The waste media MD can be supplied to the waste stacker 52 by the transport arm 36 of the media transport mechanism 31 with the media tray 51 retracted from the media delivery position above the waste stacker 52 to the data writing position.

With such a configuration, a medium that is a CD or a DVD is a blank media stacker 21, a created media stacker 22, a discard stacker 52, and a media drive 41.
The media tray 41 a and the media tray 51 of the label printer 11 are transported by the transport arm 36 of the media transport mechanism 31.

The label printer 11 includes a carriage 62 having an ink jet head 61 provided with ink ejection nozzles (not shown). The carriage 62 reciprocates in the horizontal direction along the carriage guide shaft by the driving force of the carriage motor. (Not shown).

The label printer 11 includes a cartridge mounting unit 1 in which the ink cartridge 12 is mounted.
4 is provided. The ink supply mechanism 71 has a vertical structure and is erected on the base 72 of the publisher 1 and arranged in the vertical direction. One end of a flexible ink supply tube 73 is connected to the ink supply mechanism 71, and the other end of the ink supply tube 73 is connected to the carriage 62.

The ink of the ink cartridge 12 mounted on the ink supply mechanism 71 is supplied to the carriage 62 via the ink supply tube 73, and passes through a damper unit and a back pressure adjustment unit (not shown) provided on the carriage 62. The ink is supplied to the inkjet head 61 and discharged from an ink nozzle (not shown).
The ink supply mechanism 71 is provided with a pressurizing mechanism 74 so as to dispose a main portion on the upper portion thereof. The pressurizing mechanism 74 sends out compressed air to pressurize the inside of the ink cartridge 12, thereby The ink stored in the ink pack in the cartridge 12 is sent out.

A head maintenance mechanism 81 is provided on the lower side of the carriage 62 at the home position (position shown in FIG. 4).
The head maintenance mechanism 81 includes a head cap 82 that covers the ink nozzles of the inkjet head 61 exposed on the lower surface of the carriage 62 disposed at the home position;
A waste ink suction pump 83 that sucks ink discharged to the head cap 82 by the head cleaning operation and ink filling operation of the inkjet head 61 is provided.

The ink sucked by the waste ink suction pump 83 of the head maintenance mechanism 81 is sent to the waste ink absorption tank 85 through the tube 84.
The waste ink absorption tank 85 has an absorbent material disposed in a case 86, and the upper surface thereof is covered with a cover 88 having a plurality of air holes 87.
Below the head maintenance mechanism 81, a waste ink receiving portion 89, which is a part of the waste ink absorption tank 85, is provided to receive the ink dropped from the head maintenance mechanism 81 and absorb it by the absorbent material. Yes.

(Media transport mechanism)
5 is a perspective view showing the media transport mechanism, FIG. 6 is a perspective view of a part of the media transport mechanism, and FIG.
FIG. 5 is a perspective view showing a coupling mechanism portion between a transport arm and a timing belt.
As shown in FIG. 5, the media transport mechanism 31 includes a chassis 32 that is vertically attached.
The vertical guide shaft 35 is attached between the horizontal support plate portion 34 attached to the base 72 and the top plate 33 of the chassis 32. The transfer arm 36 is supported on the vertical guide shaft 35 in a state where it can be raised and lowered and turned.

As shown in FIG. 6, the raising / lowering mechanism of the transfer arm 36 is a raising / lowering drive motor (a driving source).
(Elevating mechanism) 37, and the rotation of the drive motor 37 is transmitted to the drive pulley 101 via a pinion 97 and a transmission gear 98 attached to the output shaft of the drive motor 37. The driving pulley 101 is supported at a position near the upper end of the chassis 32 so as to be rotatable about a horizontal rotation axis. A driven pulley 103 is supported at a position near the lower end of the chassis 32 and is also rotatable around a horizontal rotation shaft. A timing belt (elevating mechanism) 104 is provided between the driving pulley 101 and the driven pulley 103.
Is overlaid. One of the left and right belt portions of the timing belt 104 is shown in FIG.
As shown in FIG. 4, the belt clip (elevating member) 112 causes the base 110 of the transfer arm 36 to be
Are connected.
Therefore, when the drive motor 37 is driven, the timing belt 104 moves in the vertical direction, and the transport arm 36 attached thereto moves up and down along the vertical guide shaft 35.

As shown in FIG. 5, the turning mechanism of the transfer arm 36 is a drive motor 1 for turning which is a drive source.
05, and a pinion (not shown) is attached to the output shaft of the drive motor 105, and the rotation of the pinion is transmitted through a reduction gear train provided with the transmission gear 107 to form a fan-shaped final gear. 109 is transmitted. The fan-shaped final gear 109 can turn left and right about the vertical guide shaft 35. The final stage gear 109 is mounted with a chassis 32 in which components of the lifting mechanism of the transfer arm 36 are assembled.
When the drive motor 105 is driven, the fan-shaped final stage gear 109 pivots left and right, so that the chassis 32 mounted here pivots left and right around the vertical guide shaft 35 as a unit. As a result, the transfer arm 36 held by the elevating mechanism mounted on the chassis 32 turns left and right around the vertical guide shaft 35.

Next, a support structure for the transfer arm 36 will be described.
FIG. 8 is an enlarged perspective view of the configuration shown in FIG. 7 viewed from below.
As shown in FIGS. 7 and 8, the base 110 of the transfer arm 36 has a sliding shaft (support) 11.
1 is provided along the vertical direction, and this sliding shaft 111 is connected to the timing belt 104 (
7) is slidably inserted into the shaft hole 112a of the belt clip 112 that holds the grip. Accordingly, the belt clip 112 can slide in the vertical direction along the sliding shaft 111.

A locking piece 112b is formed on the belt clip 112, and one end of a first tension spring (first elastic biasing means) 113 that is a coil spring is connected to the locking piece 112b. The other end of the first tension spring 113 is connected to a fixed piece 115 formed on the base 110 of the transport arm 36 and disposed above the locking piece 112b, whereby the belt clip 112 is The tension spring 113 is biased upward.
It should be noted that the belt clip 112 has a fixing portion 1 that fixes the timing belt 104 with the timing belt 104 interposed therebetween.
12c is formed.

A pressing lever 116 is disposed below the belt clip 112. The pressing lever 116 is inserted from the side into an insertion hole 118 formed in the support plate portion 117 provided on the lower surface of the base 110 of the transport arm 36 on the side of the belt clip 112. The support portion can be used as a fulcrum to swing. This pressing lever 1
16, one end of a second tension spring (second elastic biasing means) 119 made of a coil spring having a stronger biasing force than that of the first tension spring 113 is connected to the distal end portion thereof. The other end of the second tension spring 119 is connected to a fixed piece 120 formed on the base 110 of the transport arm 36 and disposed above the tip of the pressing lever 116. Thereby, the front end of the pressing lever 116 is urged upward by the second tension spring 119. Further, on the upper side in the vicinity of the distal end portion of the pressing lever 116, a swing restricting piece 121 formed on the base 110 is provided, and the pressing lever 116 biased upward by the second tension spring 119 is provided. Oscillation is restricted at a predetermined position. And belt clip 11
No. 2 is arranged at a position where a clearance S is provided with respect to the pressing lever 116 which is in contact with the swing regulating piece 121 and whose swing is regulated.

In the above support structure, when the timing belt 104 is driven by the raising / lowering drive motor 37 (see FIG. 5), the transport arm 36 moves up and down together with the belt clip 112 fixed to the timing belt 104. Here, a media guide 133 which will be described later.
Alternatively, when the gripping mechanism (grip mechanism) 130 comes into contact with the medium and the load on the lower side of the transport arm 36 becomes large, only the belt clip 112 resists the biasing force of the first tension spring 113 against the transport arm 36. Move down. When the belt clip 112 is further moved downward by the timing belt 104, the belt clip 112 comes into contact with the pressing lever 116, and after that, the conveying arm 36 is slightly bent, and then the pressing lever 116 is biased by the second tension spring 119. Against this, the support plate portion 117 swings around the support location as a fulcrum.

(Internal mechanism of transfer arm)
Next, the internal mechanism of the transfer arm 36 will be described.
9 is a perspective view showing the internal structure of the transport arm, FIG. 10 is a plan view seen from the lower surface side of the transport arm that grips the media, FIG. 11 is a sectional view of the grip portion of the transport arm, and FIG. FIG. 13 is a plan view of the media guide provided in the gripping portion of the transfer arm, FIG. 14 is a plan view of the arm base for explaining the gripping mechanism, and FIG. 15 is a plan view of the gripping mechanism. FIG. 16 is an enlarged plan view of the gripping mechanism, FIGS. 17 to 19 are plan views for explaining the movement of the swivel plate and the grip claw, and FIG.
FIG. 21 is a plan view of the arm base showing the kick-off mechanism, FIG. 22 is a front view of the transfer arm in cross-section of the grip portion, and FIG. 23 is a perspective view of the kick-off mechanism. Figure,
24 is a cross-sectional view of the swing mechanism provided in the kick-off mechanism, FIG. 25 is a plan view of the swing mechanism provided in the kick-off mechanism, and FIGS. 26 and 27 illustrate the movement of the kick-off mechanism. Each is a schematic plan view.

As shown in FIG. 9, the transfer arm 36 includes a long and narrow arm base 125a having a rectangular shape in plan view, and an arm case 125b having the same contour shape placed on the arm base 125a. Further, the arm base 125a incorporates a gripping mechanism 130 for gripping the medium M, a kick-off mechanism 131, and a media detection mechanism 200. The gripping mechanism 130, the kick-off mechanism 131, and the media detection mechanism 200 are arm cases. It is covered with 125b.

As shown in FIGS. 10 and 11, the lower surface portion in the vicinity of the tip of the arm base 125 a is a grip portion 132 that grips the medium M, and the grip portion 132 is provided with a media guide 133.

As shown in FIGS. 12 and 13, the center of the media guide 133 coincides with the pickup center of the medium M, and the center of the fixed plate portion 134 fixed to the lower surface side of the arm base 125 a. The guide portion 135 protrudes downward. The guide portion 135 has a cylindrical base end portion 135 formed to have a slightly smaller diameter than the center hole Ma of the medium M.
a and a guide surface portion 135b formed in a conical shape gradually narrowing downward from the base end portion 135a. The media guide 133 is inserted into the center hole Ma of the medium M by approaching the medium M, and when the inner peripheral surface Mb of the center hole Ma of the medium M contacts the guide surface portion 135b, Center position is guide surface 13
5b is adjusted to the center position of the media guide 133, the center hole Ma of the medium M is guided to the base end portion 135a, and the base end portion 135a is inserted into the center hole Ma of the medium M.

The media guide 133 is formed with three windows 133a, and three gripping claws 141 to 14 (to be described later) of the gripping mechanism 130 in a space in the windows 133a.
3 and the action piece 183 of the kick lever 182 of the kick-off mechanism 131 can be projected and retracted.

As shown in FIGS. 12 and 13, the gripping mechanism 130 includes three cylindrical gripping claws 141 to 143 arranged at an equal angle (120 °) interval on the same circle. 141 to 143 are circular holes 125 formed at the tip of the arm base 125a.
Each of the media guides 133 is disposed vertically inside the window 133a. These three gripping claws 141 to 143 are inserted into the center hole Ma of the medium M guided to the base end part 135a by the media guide 133, push outward in the radial direction, and project from the window part 133a of the media guide 133. By doing so, the center hole M of the media M
The medium M is held in contact with the inner peripheral surface Mb of a.

The gripping claws 141 to 143 are attached to lower ends of support pins 151 to 153 having a larger diameter than these. Each of the support pins 151 to 153 passes through the circular hole 125c of the arm base 125a and extends to the upper side thereof, and the three swiveling plates 1 disposed on the upper surface of the arm base 125a.
It is being fixed to 61-163, respectively. The arm base 125 a has a circular hole 125.
In the state surrounding c, the turning center shafts 171 to 173 are fixed vertically at equal angular intervals on the same circle, and the respective turning plates 161 to 163 can turn around these turning center shafts 171 to 173. It is supported by.

As shown in FIGS. 14 to 16, each of the swiveling plates 161 to 163 extends forward (in a counterclockwise direction when viewed from above) along the arm base 125 a along the substantially circumferential direction of the circular hole 125 c. Arm portions 161a to 163a, rear arm portions 161b to 163b extending rearward (clockwise as viewed from above) substantially along the circumferential direction of the circular hole 125c, and the circular hole 12 from the turning center.
And support arms 161c to 163c protruding inside 5c. Support arm 161c ~
Support pins 151 to 153 are vertically fixed to the back surface of the tip portion of 163c.

In the rear arm portion 161b of the swivel plate 161, a long hole 161d along the substantially radial direction of the circular hole 125c.
A slide pin 163f projecting downward at the rear end of the front arm 163a of the swivel plate 163 is slidably inserted into the elongated hole 161d.
Further, a slide surface 163e is formed at the tip of the rear arm portion 163b of the swivel plate 163 along the substantially radial direction of the circular hole 125c, and the front end of the front arm portion 162a of the swivel plate 162 is formed on the slide surface 163e. It is set so that the parts do not touch. Further, a slide surface 162e is formed at the tip of the rear arm 162b of the swivel plate 162 along the substantially radial direction of the circular hole 125c, and the front end of the front arm 161a of the swivel plate 161 is formed on the slide surface 162e. The part can be slidably contacted. Here, the long hole 161d of the swivel plate 161 and the slide surfaces 162e and 163e of the swivel plates 162 and 163 are formed in a concave curved shape set so that the respective swivel plates 161 to 163 swirl in the same direction. .

Between the rear arm portion 161b of the swivel plate 161 and the rear arm portion 162b of the swivel plate 162, the swivel plate 1
62 between the rear arm portion 162b of 62 and the rear arm portion 163b of the turning plate 163, and between the rear arm portion 163b of the turning plate 163 and the rear arm portion 161b of the turning plate 161, respectively. 174 is bridged. And these tension coil springs 174
The pulling plates 161 to 163 are held without rattling, and the direction indicated by the arrow R1 in FIG. 16 (gripping claws 141 to 14) with respect to the swiveling plates 161 to 163.
(The direction of spreading 3) is applied.

In the state of FIG. 16, the circumscribed circle of the gripping claws 141 to 143 attached to the tips of the support arms 161 c to 163 c of the swivel plates 161 to 163 has a larger diameter than the inner diameter of the center hole Ma of the medium M. . In this state, when one swivel plate 161 is swung in the direction indicated by the arrow R2, the other two swivel plates 162, 163 are also swung in the same direction. As a result, the support arms 161c to 163c of the swivel plates 161 to 163 move toward the center of the circular hole 125c, and the gripping claws 141 to 143 attached to these tip portions can be inserted into the center hole Ma of the medium M. It is narrowed to the state.
In this state, when the gripping claws 141 to 143 are inserted into the center hole Ma of the medium M and then the swiveling plates 161 to 163 are swung in the reverse direction R1, the gripping claws 141 to 143 are pushed outward in the radial direction. As a result, the gripping claws 141 to 143 are pressed against the inner peripheral surface Mb of the center hole Ma of the medium M, and the medium M is gripped.

As shown in FIG. 14, the turning plate 161 is formed with an operating arm 161g extending from the side opposite to the support arm 161c. The tip of one arm 175a of the link 175 is connected to the tip of the operation arm 161g in a rotatable state. The link 175 is rotatably supported by the arm base 125a with the middle part thereof as the center, and the tip of the arm part 175b on the opposite side is connected to the operating rod 176a of the electromagnetic solenoid 176. When the electromagnetic solenoid 176 is in an off state, the operating rod 176a is projected by the spring force of a built-in spring.

When the electromagnetic solenoid 176 is switched on in this state, the operating rod 176a is retracted against the built-in spring force, the link 175 is turned, and the turning plate 161 is turned in the R2 direction. Then, as shown in FIG. 17, the slide surface 162 of the rear arm portion 162 b of the swivel plate 162.
e is in sliding contact with the tip of the front arm portion 161a of the turning plate 161, and the inner surface of the elongated hole 161d of the rear arm portion 161b of the turning plate 161 is the slide pin 16 of the front arm portion 163a of the turning plate 163.
Touching 3f. As a result, the slide surface 162e of the swivel plate 162 slides on the tip of the front arm portion 161a of the swivel plate 161 and slides radially outward of the circular hole 125c, thereby turning the swivel plate 162 in the R2 direction. The inner surface of the long hole 161d of the rear arm 161b of the swivel plate 161 is in sliding contact with the slide pin 163f of the front arm 163a of the swivel plate 163, and the swivel plate 16
When the three front arms 163a slide toward the center of the circular hole 125c, the swivel plate 16
3 also turns in the R2 direction.

Thus, when the turning plate 161 turns in the R2 direction, the turning force of the turning plate 161 in the R2 direction is transmitted to the other turning plates 162, 163, and as shown in FIG. 18, the turning plates 162, 1
63 also swivels in the R2 direction, and gripping claws 141 to 143 provided on the support arms 161c to 163c of the swiveling plates 161 to 163 are arranged in a circumscribed circle that is sufficiently smaller than the center hole Ma of the medium M. It is narrowed to a state where it can be inserted into the center hole Ma.

In this state, when the electromagnetic solenoid 176 is switched off, the operating rod 176a is protruded by the spring force of the built-in spring, and the link 175 rotates. Then, the turning motion of the link 175 is transmitted to the turning plate 161, and the turning plate 161 turns in the R1 direction. In conjunction with this, the other two swiveling plates 162 and 163 are pulled toward the center of the circular hole 125c by the rear arm portions 162b and 163b by the pulling force of the tension coil spring 174. The plates 162 and 163 also turn in the R1 direction in the same manner as the turning plate 161. As a result, as shown in FIG. 19, the gripping claws 141 to 143 are spread and the gripping claws 141 to 1
43 is pressed against the inner peripheral surface Mb of the center hole Ma of the medium M, and the medium M is gripped.

At this time, the swivel plates 162 and 163 are separated from the swivel plate 161 by the tension coil spring 174.
Since each of the gripping claws 141 to 143 is pivoted independently in the R1 direction by the pulling force of
Each of them moves radially outward and is pressed against the inner peripheral surface Mb of the center hole Ma of the medium M.

As shown in FIG. 20, the three gripping claws 141 to 143 include cylindrical pins 141a to 143a projecting from the lower ends of the support pins 151 to 153, and rubber that concentrically surrounds the pins 141a to 143a. Elastic cylinders 141b to 143b made of These three gripping claws 141 to 143 have a length of a downward projecting length l equal to or smaller than a thickness t1 of the medium M to be gripped. The protruding length l is the center hole Ma of the medium M.
It is desirable that the thickness be equal to or greater than the thickness t2 of the inner peripheral surface Mb and equal to or less than the thickness t1 of the medium M including the height of the annular protrusion Mc. Thus, when gripping the stacked media M in the thickness direction, the gripping claws 14
1 to 143 are configured to grip only the first medium M that is the uppermost part without contacting the inner peripheral surface Mb of the second medium M.

As shown in FIGS. 21 to 23, the kick-off mechanism 131 provided on the arm base 125 a of the transport arm 36 includes a kick lever 182 whose intermediate portion is rotatably supported by the arm base 125 a at a connection point 181. ing. The kick lever 182 has a leading end lever portion 182a on the front end side and a rear end lever portion 182b on the rear end side with the connecting point 181 as a boundary. The distal end lever portion 182a has an action piece 183 that is bent downward at the tip end and further bent in an L shape on the side, and this action piece 183 is disposed in the media guide 133 of the grip portion 132. Has been.

The action piece 183 of the kick lever 182 is horizontally disposed on the lower side of the medium M in a state where the gripping claws 141 to 143 of the gripping part 132 grip the medium M. Specifically, it is arranged at the position of the second medium M of the stacked medium M in the thickness direction.
When the kick lever 182 swings in the direction R3 in FIG. 21 at the connecting point 181, the action piece 183 protrudes laterally from the window 133 a of the media guide 133, and the gripping claws 14.
1 to 143 abuts on the inner peripheral surface Mb of the center hole Ma of the second medium M on the lower side of the uppermost medium M gripped. Further, when the kick lever 182 swings in the reverse R4 direction from this state, the action piece 183 is drawn into the media guide 133.

A swing mechanism 190 is provided at the rear end lever portion 182b of the kick lever 182.
The swing mechanism 190 includes a composite clutch gear 191, a vertical composite transmission gear 192, a horizontal composite transmission gear 193, and a rack 194.
As shown in FIG. 5, the rack 194 is supported vertically by the chassis 32 constituting the media transport mechanism 31 in parallel with the vertical guide shaft 35. The rack 194 is engaged with a pinion 193b of a horizontal composite transmission gear 193 supported by the arm base 125a so as to be rotatable about a horizontal axis 193a. The rack 194 is moved up and down to raise and lower the transport arm 36. The horizontal composite transmission gear 193 having the pinion 193b meshed with each other rotates.

The horizontal composite transmission gear 193 is provided with a screw gear 193c.
3c is meshed with a screw gear 192b of a vertical compound transmission gear 192 supported on the arm base 125a so as to be rotatable about a vertical axis 192a. Thus, when the horizontal composite transmission gear 193 is rotated, the screw gears 192b and 193c engaged with each other are rotated.
The rotation of the horizontal compound transmission gear 193 having the horizontal shaft 193a is transmitted to the vertical compound transmission gear 192 having the vertical shaft 192a, and the vertical compound transmission gear 192 rotates.
The vertical compound transmission gear 192 is provided with a spur gear 192c.
Is meshed with a spur gear 191b of a composite clutch gear 191 supported by an arm base 125a so as to be rotatable about a vertical axis 191a. Thus, when the vertical compound transmission gear 192 is rotated, the rotation of the vertical compound transmission gear 192 is transmitted to the compound clutch gear 191 by the spur gears 191b and 192c meshed with each other, and the compound clutch gear 191 is rotated.

As shown in FIGS. 24 and 25, the composite clutch gear 191 includes an intermittent gear 191c that is rotatable relative to the spur gear 191b. A clutch mechanism 195 is provided between the spur gear 191b and the intermittent gear 191c. The spur gear 191b has a cylindrical shaft 191d through which a shaft 191a is inserted, and this cylindrical shaft 191d is inserted through a cylindrical shaft 191e formed on the intermittent gear 191c.
As shown in FIG. 25, the intermittent gear 191c has a tooth row 196 composed of a plurality of teeth 196a on a part of its peripheral surface, and this tooth row 196 is connected to the spur gear 192c of the vertical compound transmission gear 192 and the teeth. Is possible.

The clutch mechanism 195 provided in the composite clutch gear 191 has a torsion coil spring 197 wound around the cylindrical shaft 191e of the intermittent gear 191c. When the spur gear 191b is rotated by the spur gear 192c of the vertical compound transmission gear 192 in the R5 direction counterclockwise in FIG. 25, the frictional force generated by the torsion coil spring 197
The intermittent gear 191c is rotated with the spur gear 191b. Thereby, the intermittent gear 191c is
The tooth row 196 meshes with the spur gear 192c of the vertical compound transmission gear 192 and is rotated in the R5 direction together with the spur gear 191b. On the contrary, when the spur gear 191b is rotated by the spur gear 192c of the vertical compound transmission gear 192 in the clockwise direction R6 in FIG. 25, the frictional force generated by the torsion coil spring 197 causes the intermittent gear. 191c is spur gear 191b
And around. As a result, the intermittent gear 191c has a tooth row 196 with a vertical composite transmission gear 19.
Meshed with the second spur gear 192c and rotated in the R6 direction together with the spur gear 191b.

The intermittent gear 191c is formed with a cam hole 198.
In this case, a cam pin 182c protruding downward in the vicinity of the rear end of the rear end lever portion 182b of the kick lever 182 is slidably disposed. The cam hole 198 has a path that changes from the center side to the outer periphery side in a clockwise direction when viewed from above. Thus, in the state shown in FIG. 26, when the intermittent gear 191c rotates in the R5 direction counterclockwise when viewed from above, the cam pin 182 in the cam hole 198 is rotated.
c is displaced to the outer peripheral side, so that the kick lever 182 is connected to the connecting point 1 as shown in FIG.
The action piece 183 protrudes outward from the media guide 133 by swinging in the R3 direction around 81. In this state, when the intermittent gear 191c rotates in the clockwise direction R6 as viewed from above, the cam pin 182c in the cam hole 198 is displaced to the inner peripheral side, whereby the kick lever 182 is moved as shown in FIG. It swings in the R4 direction around the connection point 181 and the action piece 183 is pulled inward of the media guide 133.

With such a configuration, the kick-off mechanism 131 causes the composite clutch gear 191 to start rotating in the R5 direction when the transport arm 36 starts to rise, and the transport arm 36 is further lifted to bring the composite clutch gear 191 from the state shown in FIG. 27, the kick lever 182 swings in the direction R3 (see FIG. 22), and the action piece 183 of the kick lever 182 kicks off the second medium M. It is like that. When the transport arm 36 descends, the composite clutch gear 191 rotates in the R6 direction, thereby causing the kick lever 182 to swing in the R4 (see FIG. 21) direction, and the action piece 183 as shown in FIG. It is pulled into the media guide 133. Even if the transport arm 36 is further lowered in this state, the intermittent gear 191c of the composite clutch gear 191 is rotated by a predetermined amount (about 45 °) in the R6 direction by the spur gear 192c of the vertical composite transmission gear 192. From the gear 192c to the tooth row 196
Is disengaged, so that the gear rotates idle with respect to the spur gear 191b.

As shown in FIG. 9, the media detection mechanism 200 includes a detection lever 201 whose rear end is swingably supported, the front end is bent downward, and protrudes to the lower surface side of the arm base 125 a, and the detection lever 201 side. And a detector 202 provided on the side. In the media detection mechanism 200, the transport arm 36 is lowered and the upper surface of the media M comes into contact with the tip of the detection lever 201, so that the detection lever 201 swings upward, and the detection lever 201 is detected by the detector 202. Is out of the detection area, the detector 202 is turned on, and the detector 20
The proximity state to the medium M can be detected from the detection signal from 2.

Next, the pickup operation of the stacked media M by the media transport mechanism 31 having the above structure will be described.
For example, a case where the uppermost medium M of the media M stored in a stacked state is grasped and lifted from the blank medium stacker 21 will be described.
First, the electromagnetic solenoid 176 of the gripping mechanism 130 is turned on in a state where the transport arm 36 is disposed at a predetermined height position directly above the blank media stacker 21. In this state, the operating rod 176a of the electromagnetic solenoid 176 is retracted against the built-in spring,
This movement is transmitted to the swivel plate 161 via the link 175, and the swivel plate 161 is swung in the direction of arrow R2 in FIG. As a result, the remaining swiveling plates 162 and 163 are also swung in the same direction, and the supporting arms 161c to 161c of the three swirling plates 161 to 163 are arranged.
The gripping claws 141 to 143 attached to the tip of the 163c are moved to positions close to each other, so that the state in which the gripping claws 141 to 143 can be inserted into the center hole Ma of the medium M is stopped.

Thereafter, the drive motor 37 for raising and lowering the transfer arm 36 is driven, and the lowering operation of the transfer arm 36 is started. When the transport arm 36 descends and approaches the uppermost medium M, the media guide 133 of the grip part 132 is inserted into the center hole Ma of the medium M. Here, even if the center of the medium M in the blank media stacker 21 is deviated from the center of the grip part 132, the inner peripheral surface Mb of the center hole Ma of the medium M contacts the guide surface part 135b having a conical shape. As a result, the center position of the medium M is aligned with the center position of the medium guide 133 by the guide surface part 135b, and the center hole Ma of the medium M is guided to the base end part 135a.
The base end portion 135a is inserted into the center hole Ma of the medium M. That is, the center of the medium M to be gripped is positioned at the center of the grip portion 132 which is the pickup center.

At this time, when the tip of the detection lever 201 of the media detection mechanism 200 mounted on the transport arm 36 hits the surface of the medium M, the detection lever 201 swings relatively upward as the transport arm 36 descends. Then, the detection lever 201 is removed from the detection area of the detector 202, the detector 202 is turned on, and the proximity state to the medium M is detected. Thereafter, the transport arm 36 is lowered and stopped by a predetermined amount, and the gripping claws 141 to 143 of the gripping mechanism 130 incorporated in the transport arm 36 are inserted into the center hole Ma of the medium M.

By the way, although the media M are accommodated in a stacked state in the blank media stacker 21, the stacked media M are in close contact with the upper and lower media M, and thus a sticking force is generated. There is a case.
Therefore, when the second medium M is attached to the uppermost medium M, the uppermost medium can be obtained simply by bringing the gripping claws 141 to 143 into contact with the inner peripheral surface Mb of the center hole Ma of the medium M. It is difficult to position M while shifting M laterally.
For this reason, in the media transport mechanism 31, a predetermined pressing force is applied to the uppermost medium M from above, thereby applying a pressing force directed to the side of the medium M by the guide surface portion 135 b of the media guide 133. Thus, the medium M is reliably moved to the side and positioned.

Here, the relationship between the position of the belt clip 112 of the transport arm 36 and the load on the medium M will be described.
FIG. 28 is a graph showing the relationship between the lowering stroke of the belt clip of the transport arm and the load applied to the medium.
First, when the drive motor 37 continues to be driven from the state in which the grip portion 132 of the transport arm 36 is in contact with the uppermost medium M (state A in FIG. 28), the belt clip 112 fixed to the timing belt 104 is weak. 28, the belt clip 112 is lowered by the size of the gap S against the biasing force of the first tension spring 113, and then the belt clip 112 comes into contact with the pressing lever 116 (state B in FIG. 28). ). As a result, the first elastic pressing force formed by the biasing force of the first tension spring 113 having a weak spring force from when the gripping portion 132 comes into contact with the uppermost medium M until the belt clip 112 contacts the pressing lever 116. Pressure is applied (regions A to B in FIG. 28).

When the drive of the drive motor 37 is further continued, the belt clip 112 further descends. At this time, since the belt clip 112 is in contact with the pressing lever 116, the pulling-down force of the belt clip 112 is transmitted to the transport arm 36, whereby the transport arm 3.
6 is bent, and the bending force is applied to the uppermost medium M as a pressing force (regions B to C in FIG. 28).
When the driving of the drive motor 37 is further continued and the belt clip 112 is lowered, the bending force of the transport arm 36 becomes larger than the second tension spring 119 having a strong spring force (state C in FIG. 28). The lever 116 oscillates with the support location on the support plate portion 117 as a fulcrum against the urging force of the second tension spring 119. As a result, the uppermost medium M is subjected to the second biasing force of the first tension spring 113 and the bending force of the transport arm 36.
The second elastic pressing force to which the urging force of the tension spring 119 is applied is applied (regions C to E in FIG. 28).

In the media transport mechanism 31 having the load characteristics as described above, the pressing force obtained by applying the biasing force of the second tension spring 119 to the biasing force of the first tension spring 113 and the bending force of the transport arm 36 is the medium. The drive motor 37 is stopped at an appropriate position (for example, a position D in FIG. 28) in an area given to M (areas C to E in FIG. 28).
In this way, an appropriate load (about 10 N) can be applied to the uppermost medium M to the stacked medium M in the blank medium stacker 21.
Regardless of sticking to the second medium M, the medium M can be reliably moved to the side by the guide surface portion 135b of the media guide 133 and positioned.
Moreover, even if the center position of the medium M is shifted by applying a load, the media guide 133 can be reliably inserted into the center hole Ma of the medium M and positioned.

If the rigidity of the transfer arm 36 is increased and the spring constant of the transfer arm 36 is increased, the stroke of the belt clip 112 (regions B to C in FIG. 28) when generating the bending force of the transfer arm 36 is shortened. The necessary load can be obtained.

When the media M is lifted from the media drive 41 that holds one media M or the media trays 41 a and 51 of the label printer 11, the belt clip 112 is pressed after the grip 132 of the transport arm 36 contacts the media M. The medium M is applied by the gripping mechanism 130 in a state in which the first elastic pressing force including the urging force of the first tension spring 113 that is weak until the lever 116 abuts on the lever 116 is applied (region A to B in FIG. 28). In this way, the media tray 4 can be removed when the media M is taken out.
The load applied to 1a and 51 can be made as small as possible, and the influence of overload due to the load on the media trays 41a and 51 can be suppressed.

In this way, a predetermined second medium M is added to the uppermost medium M in the blank media stacker 21.
The gripping claws 141-1 inserted in the center hole Ma of the medium M with the elastic pressing force of
43 is expanded in the radial direction of the center hole Ma and pressed against the inner peripheral surface Mb of the center hole Ma.
Specifically, first, the electromagnetic solenoid 176 is switched off and its operating rod 176a is switched.
However, if it protrudes by the spring force of the spring, the turning plate 161 connected to the operating rod 176a via the link 175 turns in the R1 direction. In conjunction with this, the other two swivel plates 16
2 and 163 are swung in the R1 direction similarly to the swivel plate 161 by the pulling force of the pulling coil spring 174. As a result, the grip claws 141 to 143 are spread and the grip claws 141 to 143
143 is pressed against the inner peripheral surface Mb of the center hole Ma of the medium M, and the medium M is gripped.

At this time, the swivel plates 162 and 163 are separated from the swivel plate 161 by the tension coil spring 174.
Since each of the gripping claws 141 to 143 is pivoted independently in the R1 direction by the pulling force of
Each of them moves independently in the radial direction and is pressed against the inner peripheral surface Mb of the center hole Ma of the medium M.
Accordingly, even if the center position of the uppermost medium M is deviated from the center of the pickup, the gripping claws 141 to 143 are spread independently to the outer peripheral side, so that the inner periphery of the central hole Ma of the medium M is All the gripping claws 141 to 143 come into contact with the surface Mb, and gripping defects and the like are reliably prevented.

In addition, since each of the gripping claws 141 to 143 has a downward projecting length dimension that is equal to or less than the thickness dimension of the medium M to be gripped, the center position of the second medium M is relative to the uppermost medium M. Even if they are misaligned, it is possible to prevent a problem that the gripping claws 141 to 143 come into contact with the edge of the center hole Ma of the second medium M to cause gripping failure.

When the medium M is gripped in this manner, the transport arm 36 is raised and the gripped medium M is lifted while the gripping claws 141 to 143 are pushed and expanded in the radial direction. At this time, since the gripped uppermost medium M is securely gripped by all the gripping claws 141 to 143, it is smoothly lifted without gripping failure.

Further, when the transport arm 36 is lifted to lift the media M, the kick-off mechanism 13
One kick lever 182 swings in the direction of arrow R3 in FIG. 21 around the connection point 181 and the action piece 183 protrudes outward of the media guide 133.
As a result, even if the second medium M is likely to be lifted by sticking to the medium M to be lifted, the action piece 183 of the kick lever 192 remains on the inner peripheral surface of the center hole Ma of the second medium M. By abutting on Mb, it is possible to reliably kick off the second medium M and lift only the uppermost medium M.

As described above, according to the media transport mechanism 31 of the above embodiment, the transport arm 36
When the transport arm 36 descends, the grip portion 132 selectively applies either the first elastic pressing force or the second elastic pressing force larger than the first elastic pressing force to the medium M. Therefore, the media M can be positioned by the media guide 133 and held by the gripping mechanism 130 with different appropriate pressing forces depending on the accommodation state of the media M.

For example, when positioning and gripping one medium M accommodated in the media trays 41a and 51 of the printer 41 and the printer 11 which need almost no pressing force at the time of positioning and should be rather weak pressing force. In the media stackers 21 and 22, the grip 132 may be pressed with a relatively weak first elastic pressing force to cause a large positional shift, and the media stackers 21 and 22 generate a sticking force by being in close contact with the media M immediately below. When the uppermost medium M in the stacked medium M is positioned and gripped, the gripping portion 132 can be pressed against the medium M by the second elastic pressing force larger than the first elastic pressing force. . As a result, the drive 41
In the media trays 41a and 51 of the printer 11, the media M can be gripped without any malfunction of the media trays 41a and 51 due to excessive pressing force.
, 22, the uppermost medium M can be slid to the side by the media guide 133 against the sticking force with the medium M directly below, and can be securely gripped by the gripping mechanism 130.

Further, a belt clip 11 which is a lifting member that is lifted and lowered by the timing belt 104.
2 until the pressing lever 116 contacts the pressing lever 116, the biasing force of the first tension spring 113 can be the first elastic pressing force, and the belt clip 112 contacts the pressing lever 116 and the pressing lever 116 is rocked. From the moved state, the urging force of the first tension spring 113, the bending force of the transfer arm 36, and the urging force of the second tension spring 119 can be easily and appropriately set as the second elastic pressing force. it can.
Further, by providing the second tension spring 119, it is possible to prevent a load more than necessary from being applied to the media in the regions C to E in FIG. Furthermore, it is possible to prevent the driving motor 37 from being subjected to a load more than necessary and to employ a cheaper motor.

According to the publisher 1, the media transport mechanism 31 that can position and grip the medium M reliably is provided, so that the processing apparatus with high processing reliability can be obtained.

It is an external appearance perspective view of a publisher (media processing apparatus). It is a perspective view of the front side of the state which removed the case of the publisher. It is a perspective view of the back side of the state which removed the case of the publisher. It is a perspective view of the recording device part installed in the publisher. It is a perspective view which shows a media conveyance mechanism. FIG. 6 is a perspective view of a part of the media transport mechanism. It is a perspective view which shows the connection mechanism part of a conveyance arm and a timing belt. It is the expansion perspective view seen from the lower part side which shows the connection mechanism part of a conveyance arm and a timing belt. It is a perspective view which shows the internal structure of a conveyance arm. It is the top view seen from the lower surface side of the conveyance arm which grasped media. It is sectional drawing in the holding part of a conveyance arm. FIG. 6 is a perspective view of a media guide provided in a grip portion of a transfer arm. It is a top view of the media guide provided in the holding part of the conveyance arm. It is a top view of the arm base explaining a gripping mechanism. It is a perspective view of the holding claw part of a gripping mechanism. It is an enlarged plan view of a grip claw part. It is each a top view explaining the movement of a turning board and a holding claw. It is each a top view explaining the movement of a turning board and a holding claw. It is each a top view explaining the movement of a turning board and a holding claw. It is sectional drawing of the holding nail explaining a holding nail. It is a top view of the arm base which shows a kick-off mechanism. It is a front view of the conveyance arm which looked at the holding part in section. It is a perspective view of a kick-off mechanism. It is sectional drawing of the rocking | fluctuation mechanism part provided in the kick-off mechanism. It is a top view of the rocking mechanism part provided in the kick-off mechanism. It is each a schematic plan view explaining the movement of a kick-off mechanism. It is each a schematic plan view explaining the movement of a kick-off mechanism. It is a graph which shows the relationship between the downward stroke of the belt clip of a conveyance arm, and the load concerning a medium.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Publisher (media processing apparatus), 31 ... Media conveyance mechanism, 36 ... Conveyance arm, 37 ... Drive motor (elevating mechanism), 104 ... Timing belt (elevating mechanism), 111 ... Sliding shaft (support part), 112 ... Belt clip (elevating member), 113 ... first tension spring (
(First elastic urging means), 116 ... pressing lever, 119 ... second tension spring (second elastic urging means), 130 ... gripping mechanism (gripping mechanism), 132 ... gripping part, 133 ... media guide, M: media, Ma: center hole, S: gap (predetermined dimensions).

Claims (5)

A gripping mechanism that grips the center hole of the media from the inner peripheral side, and a shape that gradually decreases in outer diameter toward the tip, and is inserted into the center hole of the media, whereby the center of the media is centered on the gripping mechanism. A gripping portion having a media guide positioned at the center;
A movable lever having an action piece that contacts an inner peripheral surface of a center hole of a medium immediately below the uppermost medium gripped by the gripping part and moves the immediately lower medium relative to the uppermost medium ; A media transport mechanism disposed on a transport arm capable of moving up and down,
When the gripping part grips the topmost medium, the gripping part grips the topmost medium in a pressed state;
The lever is configured to move the media immediately below by causing the action piece to protrude outward from the media guide after the uppermost media is gripped. The media transport mechanism according to claim 1,
The gripping portion selectively selects either the first elastic pressing force or the second elastic pressing force larger than the first elastic pressing force according to the accommodation state of the medium to be gripped. Media transport mechanism characterized in that it acts on the media. The media transport mechanism according to claim 2,
The media transport mechanism, wherein the second elastic pressing force is applied to the top media when transporting the top media from a place where a plurality of media are stacked. The media transport mechanism according to claim 2,
The media transport mechanism, wherein the first elastic pressing force is applied to the single medium when the single medium is transported from a place where the single medium is held.   A media processing apparatus comprising the media transport mechanism according to claim 1.

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