JP4888131B2 - Belt drive mechanism control method, belt drive mechanism, and media processing apparatus including the same - Google Patents

Description

  The present invention relates to a method for controlling a belt driving mechanism having a timing belt wound around a driving pulley and a driven pulley, a belt driving mechanism, and a media processing apparatus including the belt driving mechanism.

  In recent years, there have been known media processing devices such as a disc dubbing device for writing data on a large number of blank CDs and DVDs and a CD / DVD publisher capable of producing and issuing media by performing data writing and label printing. It has been. This type of media processing apparatus includes a drive that writes data to the media and a printer that prints on the label side of the media.

  This type of media processing apparatus is a belt drive in which a timing belt is wound around a driving pulley and a driven pulley, and the tray is fixed to the timing belt in order to horizontally move a tray on which a medium is placed by a printer or a drive. Some have a mechanism (see, for example, Non-Patent Document 1).

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By the way, in the belt driving mechanism, in order to perform information processing (data writing or printing) on the medium with high quality, it is necessary to detect the position of the tray as a moving body with high accuracy.
For this reason, the tray is moved to one end side of the belt drive mechanism, the tray is abutted against a movement restricting member provided on one end side, and the time when the drive current of the servo motor that is the drive motor greatly fluctuates is set as the origin position. The position of the moving body is detected by an encoder provided on the drive pulley.

  However, the position where the tray is abutted against the movement restricting member is the position of the motor torque fluctuation, distortion of the members such as the frame, slack of the timing belt, rattling of the pulley shaft or timing belt and the tray, and rattling of the clutch. For example, the position of the original origin may be displaced, which makes it difficult to detect the position of the tray with high accuracy, and the quality of information processing such as printing on media may be degraded.

  Therefore, an object of the present invention is to set the origin position of the moving body with high accuracy, to detect the position of the moving body with high accuracy, and to perform high-quality information processing on the object to be processed held by the moving body. A belt driving mechanism control method, a belt driving mechanism, and a media processing apparatus including the belt driving mechanism are provided.

  In the belt driving mechanism control method according to the present invention, which can solve the above-described problems, a timing belt is wound around a driving pulley rotated by a driving source and a driven pulley rotatably supported. A method of controlling a belt driving mechanism for moving a movable body fixed to a part of the timing belt by running of the timing belt by rotation, wherein the movement restricting member provided on one end side of the moving path of the movable body After the moving body is moved and abutted, the rotation of the driving pulley by the driving source is stopped, and the position of the moving body is detected after the elapse of a predetermined time, and is set as the origin position of the moving body. .

According to this belt drive mechanism control method, after the moving body is moved against the movement restricting member provided on one end side of the moving path of the moving body, the rotation of the driving pulley by the driving source is stopped, and the predetermined time is reached. By setting the position of the moving body detected after the passage as the origin position, the torque fluctuation of the motor, the distortion of the member such as the frame, the slack of the timing belt, the pulley shaft and belt The position of the moving body can be set as the origin position after the positional deviation due to the backlash between the moving body and the moving body is settled and converged to the original position, and variations due to repeated setting of the origin position can be suppressed.
That is, the origin position of the moving body can be set with high accuracy, and the subsequent position detection of the moving body can be performed with high accuracy. Processing can be performed.

  Further, the belt drive mechanism according to the present invention that can solve the above-described problem is a timing belt wound around a drive pulley that is rotated by a drive source and a driven pulley that is rotatably supported, and the rotation of the drive pulley. A belt driving mechanism for moving a movable body fixed to a part of the timing belt by traveling of the timing belt, wherein the movable body is brought into contact with one end side of a movement path of the movable body and moved. A movement regulating member that regulates, a position detector that detects the position of the moving body, a control unit that detects the position of the moving body based on a detection signal from the position detector, and controls the drive source; And the controller stops the rotation of the drive pulley by the drive source after moving the moving body to one end of the movement path and abutting against the movement restricting member. Allowed, characterized in that the home position of the movable body performs position detection of the moving object based on the detection signal from the position detector after a predetermined time elapses.

According to the belt drive mechanism having this configuration, the control unit stops the rotation of the drive pulley by the drive source after moving the movable body against the movement restricting member provided on one end side of the moving path of the movable body. Since the position of the moving body detected after the elapse of a predetermined time is set as the origin position, the torque fluctuation of the motor, the distortion of the members such as the frame, the slack of the timing belt, the pulley The position of the moving body can be set as the origin position after the positional deviation due to shakiness between the shaft or belt and the moving body has converged, and variations due to repeated setting of the origin position can also be suppressed.
That is, the origin position of the moving body can be set with high accuracy, and the subsequent position detection of the moving body can be performed with high accuracy. Processing can be performed.

The position detector may include a disk integrally provided on the rotation shaft of the drive pulley, and a sensor for detecting a plurality of slits formed at equal intervals along the periphery of the disk. preferable.
According to this configuration, the position of the moving body can be detected with high accuracy based on the detection signal from the sensor that detects the slit of the disk that rotates together with the drive pulley, and thereby the origin position set with high accuracy. Therefore, the moving body can be moved accurately.

Moreover, it is preferable that the said control part stops rotation of the said drive pulley by the said drive source, when the drive current value of the said drive source becomes more than a predetermined threshold value.
According to this configuration, when the drive current value of the drive source becomes equal to or greater than a predetermined threshold, the control unit stops the rotation of the drive pulley by the drive source, so that the moving body hits the movement regulating member. It is possible to reliably detect and subsequently set the origin position smoothly.

  The media processing apparatus according to the present invention is a media processing apparatus including a media tray that moves while holding a medium, and a processing unit that performs information processing on the media on the media tray. The media tray is moved as the moving body by the belt driving mechanism according to the invention.

  According to the media processing device of this configuration, since the belt drive mechanism that can set the origin position of the tray with high accuracy is provided, the tray can be moved with high accuracy, and the media held in the tray can be On the other hand, for example, the processing unit can perform high-quality information processing such as printing, and can improve the accuracy of media delivery to the tray.

Embodiments of a belt driving mechanism control method, a belt driving mechanism, and a media processing apparatus including the belt driving mechanism according to the present invention will be described below with reference to the drawings.
In the present embodiment, 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 is provided with a pair of left and right arc-shaped frame plates 24 and 25, thereby allowing the blank media MA to be received from above and stored in a coaxially stacked state. 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. By this, the created media MB is received from the upper side and stacked in a coaxial manner. A stackable stacker is configured.

  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 provided vertically on a horizontal support plate portion 34 attached to a base 72. A transport arm 36 is supported on the vertical guide shaft 35 so as to be able to move up and down and turn. 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.

  The label printer 11 also 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.

  Below the media delivery position of the media tray 51, a disposal stacker 52 for storing the disposal media MD is arranged. For example, about 30 disposal media MD are stored in the disposal stacker 52. It is possible. With the media tray 51 retracted from the media delivery position above the discard stacker 52 to the data writing position, the discard media MD can be supplied to the discard stacker 52 by the transport arm 36 of the media transport mechanism 31. .

  With such a configuration, media including CDs or DVDs are transported between the blank media stacker 21, the created media stacker 22, the disposal stacker 52, the media tray 41 a of the media drive 41, and the media tray 51 of the label printer 11. It is transported by the transport arm 36 of the mechanism 31.

Next, the configuration of the label printer 11 will be described.
As shown in FIGS. 2 to 4, the label printer 11 includes a carriage 62 having an inkjet head (information processing unit) 61, and this carriage 62 reciprocates in the horizontal direction along the carriage guide shaft 63. Supported as possible. The carriage 62 includes a carriage belt 64 that is a timing belt that extends horizontally along the carriage guide shaft 63, and a carriage motor 65 that drives the carriage belt 64. A flexible ink supply tube 73 connected to the ink supply mechanism 71 is connected to the carriage 62 of the label printer 11.

  The inkjet head 61 mounted on the carriage 62 has a nozzle surface facing downward, and the media tray (moving body) 51 can reciprocate horizontally in the front-rear direction at the lower position of the inkjet head 61. Yes. The media tray 51 has a right end supported by a guide shaft 102 extending horizontally in the front-rear direction, and a left end supported by a guide rail 104 extending horizontally in the front-rear direction in a slidable state. . The drive mechanism for the media tray 51 is also configured to include a tray belt 113 that extends horizontally in the front-rear direction and a tray motor (drive source) 124 for driving the belt.

The media tray 51 includes, on the upper surface of a rectangular plate, a low circular convex portion 51a that is in contact with the outer peripheral end surface of the media and restricts the movement of the media.
Moreover, the center part of this convex part 51a is equipped with the three vertical nail | claws (illustration omitted) arrange | positioned on the concentric circle at intervals of 120 degree | times. The three vertical claws can move together in the radial direction, and when the media tray 51 moves to the media delivery position, it moves inward in the radial direction by a cam mechanism (not shown).

  When the media is dropped into the convex portion 51a from above with the label surface facing upward at the media delivery position, three vertical claws are inserted into the center hole of the media. Thereafter, when the tray motor 124 is driven to move the media tray 51 to the rear side (the right rear side in FIG. 4) along the guide shaft 102, the three vertical claws are moved in the radial direction by the action of the cam. The three vertical claws are pressed against the inner peripheral surface of the center hole of the media from the inside. As a result, the media is held on the media tray 51. If the media tray 51 is moved into the printing area of the inkjet head 61, the inkjet head 61 can perform predetermined printing on the label surface of the media.

Next, the belt drive mechanism for moving the media tray 51 will be described in detail.
FIG. 5 is a schematic plan view of the belt drive mechanism, and FIG. 6 is a schematic side view of the belt drive mechanism.
The media tray 51 moved by the belt driving mechanism 100 is arranged such that a guide shaft 102 extending horizontally in the front-rear direction of the apparatus passes through a slide bearing 101 provided on one side of the media tray 51, and on the other side. The provided slide piece 103 is slidably mounted on a guide rail 104 extending in the front-rear direction of the apparatus. Thus, the media tray 51 is supported by the guide shaft 102 and the guide rail 104 so as to be slidable in the front-rear direction of the apparatus.

The guide shafts 102 are arranged at intervals along a frame 105 disposed in the front-rear direction of the apparatus, and both ends thereof are fixed to fixing plates 106 provided at both ends of the frame 105.
A tray drive pulley (drive pulley) 111 is rotatably provided in the frame 105 in the vicinity of the end portion on the rear side of the apparatus, and a tray driven pulley (driven pulley) 112 is rotatable in the vicinity of the end section on the front side of the apparatus. Is provided. A tray belt 113 as a timing belt is wound around the tray driving pulley 111 and the tray driven pulley 112, and one side portion of the media tray 51 is fixed to the tray belt 113 by a belt clamp 114. ing. Thereby, the media tray 51 is slid in the running direction when the tray belt 113 is run.

  A disc-shaped encode plate (disk) 122 and a transmission pulley 123 are fixed to the rotating shaft 121 of the tray drive pulley 111. A tray motor 124 formed of a DC servo motor is provided below the frame 105, and a motor pulley 126 is provided on the drive shaft 125 of the tray motor 124. A transmission belt 127 is wound around the transmission pulley 123 and the motor pulley 126.

  A plurality of position detection slits are formed at equal intervals along the periphery of the encode plate 122, and a sensor 120 provided at a position where the periphery of the encode plate 122 passes is used for position detection of the encode plate 122. A slit is detected. The encoder plate 122 and the sensor 120 constitute an encoder (position detector) 119 having a rotary encoder configuration, and the position of the media tray 51 can be detected based on a detection signal from the sensor 120 of the encoder 119. Has been.

The sensor 120 includes a light emitting unit 120a made of a light emitting diode and a light receiving unit 120b made of a phototransistor, which are arranged so as to face each other through the periphery of the encode plate 122. When the light from the light emitting unit 120a passes through the position detection slit of the encode plate 122 and is received by the light receiving unit 120b, an electrical signal is output from the light receiving unit 120b.
The sensor 120 of the encoder 119 is connected to the control unit 131 that drives the tray motor 124, and a detection signal is transmitted to the control unit 131.

  In the belt driving mechanism 100, when the tray motor 124 is driven to rotate the driving shaft 125, the rotational force of the driving shaft 125 is transferred to the tray by the transmission belt 127 wound around the motor pulley 126 and the transmission pulley 123. It is transmitted to the rotating shaft 121 of the driving pulley 111, and the tray driving pulley 111 is rotated. When the tray driving pulley 111 is thus rotated, the tray belt 113 wound around the tray driving pulley 111 and the tray driven pulley 112 travels, whereby the media tray fixed to a part of the tray belt 113 is driven. 51 is moved in the front-rear direction of the apparatus.

  At this time, the control unit 131 detects the position of the media tray 51 based on the detection signal from the sensor 120 of the encoder 119, controls the drive of the tray motor 124, and moves the media tray 51 to a predetermined position.

  Here, as shown in FIG. 7, the media tray 51 has an origin position O at the rear end (left side in FIGS. 5 and 6) where the tray driving pulley 111 is disposed. To the feed direction when printing on the media M held on the media tray 51 by the inkjet head 61 from the home position HP, the printing area PA by the inkjet head 61, the delivery position PP of the media M to the media tray 51, the front of the apparatus The control unit 131 moves the media tray 51 from the home position HP to the printing area PA and the delivery position PP based on a detection signal from the sensor 120 of the encoder 119.

As shown in FIG. 5, a movement restriction member 132 that restricts movement of the media tray 51 to the rear side of the apparatus is provided at an end portion on the rear side of the apparatus. The origin position O is set by bringing the media tray 51 into contact therewith.
In this belt drive mechanism 100, the control unit 131 sets the origin position O of the media tray 51 each time the publisher 1 is turned on.

Hereinafter, detection control of the origin position O of the media tray 51 by the control unit 131 will be described with reference to a flowchart.
FIG. 8 is a flowchart showing the origin position detection control.
When the publisher 1 is turned on, first, a counter for detecting the position of the media tray 51 based on the detection signal from the sensor 120 of the encoder 119 is reset (step S01).
Next, by driving the tray motor 124, the media tray 51 is moved toward the origin position O (step S02). Specifically, the media tray 51 is abutted against the origin position O in the order of the origin position O → the moving end E → the origin position O. Note that the moving speed of the media tray 51 at this time is slower than the moving speed at the time of printing by the inkjet head 61.

  Thereafter, the drive current value of the tray motor 124 is compared with a predetermined threshold value. When it is determined that the drive current value is equal to or greater than the threshold value (step S03), the media tray 51 hits against the movement restricting member 132 and stops. Determination is made and the drive of the tray motor 124 is stopped (step S04).

When the media tray 51 is abutted against the movement restricting member 132, due to the abutting force, torque variation of the tray motor 124, distortion of members such as a frame, slack of the tray belt 113, tray drive pulley 111 and tray follower are caused. A backlash on the shaft of the pulley 112, a backlash between the tray belt 113 and the media tray 51, and the like occur. Therefore, if position detection is performed by the encoder 119 while the media tray 51 is abutted against the movement restriction member 132 while the tray motor 124 is driven, an error occurs with respect to the actual origin position O.
In order to avoid this, in the present embodiment, after the drive of the tray motor 124 is stopped, the system waits for a predetermined time (step S05).

  As described above, when waiting for a predetermined time after the drive of the tray motor 124 is stopped, torque fluctuation of the tray motor 124 caused by the media tray 51 being abutted against the movement restricting member 132, distortion of members such as a frame, tray belt, and the like. The positional deviation due to the slack of 113, the rattling of the tray drive pulley 111 and the tray driven pulley 112, and the rattling between the tray belt 113 and the media tray 51 converge.

  The predetermined time is a time for which the positional deviation after the contact with the movement restricting member 132 is sufficiently converged, and can be obtained in advance by a plurality of tests. In this embodiment, the predetermined time is set to 200 milliseconds as an example.

When the predetermined time has elapsed, the position of the media tray 51 based on the detection signal from the sensor 120 of the encoder 119 is set to the origin position O (step S06).
Thereafter, the position of the media tray 51 is detected based on the detection signal from the sensor 120 of the encoder 119 with the origin position O as a reference.

The control unit 131 moves the media tray 51 in which the origin position O is set to the home position HP set as a position away from the origin position O by a predetermined distance (determined by the number of pulses of the tray motor 124). The media tray 51 is moved to the printing area PA for performing the printing process by the inkjet head 61 and the delivery position PP of the medium M with the position HP as the standby position.
After the origin position O is detected, the media tray 51 is moved with reference to the home position HP until the power is turned off.

  As described above, according to this embodiment, after the media tray 51 is moved and abutted against the movement restricting member 132 provided on one end side of the movement path of the media tray 51, the tray driving pulley 111 by the tray motor 124 is used. , And the position of the media tray 51 is detected after a lapse of a predetermined time, and is set as the origin position O of the media tray 51. Therefore, the torque motor 124 at the time of abutting the media tray 51 against the movement restricting member 132 is used. Position due to fluctuations in torque, distortion of members such as frames, slack of the tray belt 113, rattling on the shafts of the tray driving pulley 111 and the tray driven pulley 112, rattling between the tray belt 113 and the media tray 51, etc. After the deviation converges, the correct position can be set as the origin position O, and the repeat of the origin position O can be performed. Variations due to tooth set of can also be suppressed.

  According to the publisher 1, since the belt drive mechanism 100 that can set the origin position O of the media tray 51 with high accuracy is provided, the media tray 51 can be moved with high accuracy. The medium M held on the medium 51 can be printed with high quality by the inkjet head 61, and the accuracy of delivery of the medium M to the medium tray 51 can be improved.

  Further, when the drive current value of the tray motor 124 becomes equal to or greater than a predetermined threshold value, the control unit 131 stops the rotation of the tray drive pulley 111 by the tray motor 124, so that the media tray 51 to the movement restriction member 132 is stopped. Can be reliably detected, and the subsequent origin position O can be set smoothly.

  Further, as a means for detecting the position of the media tray 51, an encode plate 122 provided integrally with the rotation shaft 121 of the tray drive pulley 111, and a plurality of the plate formed at equal intervals along the periphery of the encode plate 122. Since the encoder (rotary encoder) 119 including the sensor 120 for detecting the slit is provided, the media tray is based on the detection signal from the sensor 120 as compared with the case where the position of the media tray 51 is detected by the linear encoder, for example. The position 51 can be detected with high accuracy. Thereby, the media tray 51 can be accurately moved from the origin position O set with high accuracy. That is, it is possible to perform high-definition printing processing on the medium M on the media tray 51.

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 schematic plan view of a belt drive mechanism. It is a schematic side view of a belt drive mechanism. It is a schematic plan view explaining the position of a media tray. It is a flowchart which shows the detection control of an origin position.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Publisher (media processing apparatus), 51 ... Media tray (moving body), 61 ... Inkjet head (information processing part), 100 ... Belt drive mechanism, 111 ... Tray drive pulley (drive pulley), 112 ... Tray driven pulley ( Driven pulley), 113 ... tray belt (timing belt), 119 ... encoder (position detector), 120 ... sensor, 122 ... encode plate (disc), 124 ... tray motor (drive source), 131 ... control unit, 132 ... movement restriction member, M ... media, O ... origin position.

Claims (5)

A moving body in which a timing belt is wound around a driving pulley rotated by a driving source and a driven pulley rotatably supported, and is fixed to a part of the timing belt by traveling of the timing belt by the rotation of the driving pulley. A method of controlling a belt drive mechanism for moving
After the moving body is moved and abutted against a movement restricting member provided on one end side of the moving path of the moving body, the driving of the driving source is stopped to stop the rotation of the driving pulley, and after a predetermined time has elapsed. A method for controlling a belt drive mechanism, wherein the position of the moving body is detected and set as the origin position of the moving body. A moving body in which a timing belt is wound around a driving pulley rotated by a driving source and a driven pulley rotatably supported, and is fixed to a part of the timing belt by traveling of the timing belt by the rotation of the driving pulley. A belt drive mechanism for moving
A movement regulating member that regulates movement by bringing the moving body into contact with one end of the moving path of the moving body;
A position detector for detecting the position of the moving body;
A controller that detects the position of the moving body based on a detection signal from the position detector and controls the drive source;
The controller moves the moving body to one end of the moving path and abuts against the movement restricting member, and then stops driving the driving source to stop the rotation of the driving pulley, and a predetermined time has elapsed. A belt driving mechanism characterized in that the position of the moving body is detected later based on a detection signal from the position detector to obtain the origin position of the moving body. The belt drive mechanism according to claim 2,
The position detector includes a disk integrally provided on the rotation shaft of the drive pulley, and a sensor for detecting a plurality of slits formed at equal intervals along the periphery of the disk. Belt drive mechanism. The belt drive mechanism according to claim 2 or 3,
The control unit stops the rotation of the drive pulley by the drive source when the drive current value of the drive source becomes equal to or greater than a predetermined threshold value. A media processing device comprising a media tray that moves while holding media, and a processing unit that performs information processing on media on the media tray,
A media processing apparatus, wherein the media tray is moved as the movable body by the belt driving mechanism according to claim 2.

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