JP2008180279A - Belt drive mechanism and media processing apparatus having the same - Google Patents

Abstract

A belt driving mechanism capable of moving a moving body with high accuracy and improving the quality of processing on an object to be processed held by the moving body, and a media processing apparatus including the belt driving mechanism.
A belt driving mechanism 100 has a tray belt 113 wound around a tray driving pulley 111 and a tray driven pulley 112, and moves a media tray 51 fixed to a part of the tray belt 113 by running of the tray belt 113. The medium M held on the media tray 51 is subjected to a printing process by the ink-jet head 61, and the guide shaft 102 is provided along the moving direction of the media tray 51 by the tray belt 113. The media tray 51 is slidably supported, and a tray driving pulley 111 is disposed on the front side in the moving direction of the media tray 51 when the inkjet head 61 performs printing processing on the medium M.
[Selection] Figure 5

Description

  The present invention relates to a belt driving mechanism having a timing belt wound around a driving pulley and a driven pulley, 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, Patent Document 1).

US Pat. No. 5,927,208

  By the way, when printing is performed on the label surface of the medium by the recording head while the tray holding the medium is moved by the belt driving mechanism, the belt driving mechanism rotates the driving pulley provided on the rear side in the moving direction of the tray. In the structure in which the timing belt is driven, the force for moving the tray is transmitted via the timing belt from the tray to the front driven pulley and the timing belt from the driven pulley to the driving pulley. Thereby, the movement accuracy of the tray includes the eccentricity of the driven pulley on the front side in the movement direction of the tray and the rattling of the support portion of the shaft, and the tray cannot be moved with high accuracy. This is a factor that deteriorates the print quality on the media held in the tray.

  On the other hand, in Patent Document 1, although there is a drive pulley on the front side in the moving direction, a guide shaft provided so as to move along the moving direction is provided on the moving tray side, and the bearing of the guide shaft is fixed on the frame side. Because of the structure, the bending moment acting on the tray to support its own weight varies depending on the position of the tray in the front-rear direction. For this reason, the posture varies depending on the position of the tray, which also causes a decrease in print quality on the medium.

  Also, as a mechanism for moving the tray, the pinion is engaged with a rack formed on the tray, the pinion is driven to rotate and the tray is moved, or the ball screw is screwed onto the female screw formed on the tray, and the ball screw is rotated. Some of them move the tray, but in any case, since the ratchet part of the rack and pinion and the screw part of the female screw and the ball screw occur, the tray must be moved with high accuracy. Cannot be printed, and the print quality on the media is degraded.

  Therefore, an object of the present invention is to provide a belt driving mechanism capable of moving a moving body with high accuracy and improving the quality of processing on an object to be processed held by the moving body, and a media processing apparatus including the belt driving mechanism. It is to provide.

  The belt drive mechanism according to the present invention that can solve the above-described problem is a belt drive mechanism that is rotated by a drive source and a driven pulley that is rotatably supported by a timing belt, and the rotation of the drive pulley causes the belt to rotate. A belt driving mechanism that moves a moving body fixed to a part of the timing belt by traveling of a timing belt, and performs processing on a workpiece to be processed held by the moving body by a processing unit, wherein the timing is The moving body is slidably supported with respect to a guide shaft provided along the moving direction of the moving body by a belt, and the moving body moves forward in processing the workpiece to be processed by the processing unit. The drive pulley is arranged in the above.

According to the belt driving mechanism having this configuration, the driving pulley is arranged on the front side in the moving direction of the moving body when the processing unit processes the object to be processed. It is transmitted only through the timing belt to the drive pulley. In this way, the tray can be moved without passing through the driven pulley during processing of the workpiece, so that the eccentricity of the driven pulley and the shaft are compared with the case where the driven pulley is arranged on the front side in the movement direction. The influence of disturbance such as rattling of the support part can be suppressed as much as possible.
Moreover, since the moving body is slidably supported with respect to the guide shaft provided along the moving direction, the guide shaft is provided on the moving body along the moving direction, and compared with a structure that supports the guide shaft so as to be slidable. Thus, a change in the bending moment due to the position of the moving body can be suppressed, and a change in the posture of the moving body due to a change in the bending moment can be suppressed as much as possible. Thus, since the moving body can be moved with high accuracy, the processing quality by the processing unit for the object to be processed held by the moving body can be greatly improved.

The moving body may include a bearing through which the guide shaft is slidably inserted, and a pressing member pressed by a biasing member in a direction perpendicular to the axial direction with respect to the guide shaft. preferable.
According to this configuration, since the pressing member is pressed against the guide shaft in a direction orthogonal to the axial direction, rattling between the bearing of the movable body and the guide shaft can be suppressed as much as possible. The moving body can be moved with higher accuracy.

In addition, a pair of opposing fixed plates that support both ends of the guide shaft are provided, and the end portions of the guide shaft are inserted into window portions formed in the fixed plates, and are formed in the window portions by biasing members. It is preferable that the guide shaft is urged and positioned at the corners formed.
According to this configuration, the end of the guide shaft is inserted into the window portion formed in the fixed plate, and the guide shaft is urged to the corner portion formed in the window portion by the urging member. The shaft can be supported in a state where the shaft is positioned without rattling at both ends thereof.

The guide shaft is formed with an engaging groove extending in the circumferential direction in the vicinity of both ends, and the guide shaft is engaged with a part of the biasing member supported by the fixing plate. It is preferable that the movement in the axial direction is restricted.
According to this configuration, a part of the urging member supported by the fixed plate is engaged with the engaging groove of the guide shaft, so that the guide shaft is supported in a state in which movement in the axial direction is regulated very easily. can do.

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 apparatus having this configuration, the media tray that holds the media can be moved with high accuracy, so that the media can be subjected to processing such as printing with high quality by the processing unit.

Embodiments of a belt drive mechanism and a media processing apparatus including the belt drive 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 ink jet head 61, and this carriage 62 is supported along a carriage guide shaft 63 so as to be reciprocally movable in the horizontal direction. Yes. 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 51 can reciprocate horizontally in the front-rear direction at the lower position of the inkjet head 61. 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 of the media tray 51 is also configured to include a tray belt 113 that is a timing belt that extends horizontally in the front-rear direction, and a tray motor 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 abuts on the outer peripheral end surface of the media to restrict 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 in the radial inner direction by a cam mechanism (not shown).

  At the media delivery position, when the media is dropped onto the convex portion 51a with the label surface facing upward, the 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, a belt driving mechanism that moves the media tray 51 will be described.
5 is a schematic plan view of the belt drive mechanism, FIG. 6 is a schematic side view of the belt drive mechanism, FIG. 7 is a plan view showing a support portion of the guide shaft, FIG. 8 is a side view showing the support portion of the guide shaft, and FIG. FIG. 5 is a perspective view of the media tray supporting portion with respect to the guide shaft as viewed from the back side.

  As shown in FIGS. 5 and 6, the media tray 51 moved by the belt driving mechanism 100 has a pair of slide bearings 101 provided on one side thereof and a guide shaft 102 extending horizontally in the front-rear direction of the apparatus. A slide piece 103 that is disposed through and provided on the other side is slidably mounted on a guide rail 104 that extends 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. Here, the right side of FIGS. 5 and 6 is the front side of the apparatus, and the left side of FIGS. 5 and 6 is the rear side of the apparatus. That is, when printing the label surface, the media tray 51 is moved from the left to the right in FIGS.

  A tray driving pulley (driving pulley) 111 is rotatably provided in the vicinity of the end portion on the front side of the apparatus on the frame 105, and a tray driven pulley (driven pulley) 112 is rotatable in the vicinity of the end section on the rear side of the apparatus. Is provided. A tray belt 113 that is a timing belt is wound around the tray driving pulley 111 and the tray driven pulley 112. The one side part of the media tray 51 is fixed to the part) by the belt clamp 114. Thereby, the media tray 51 is slid along the traveling direction when the tray belt 113 travels.

  An encode plate 122 and a transmission pulley 123 are fixed to the rotating shaft 121 of the tray drive pulley 111. A tray motor 124 as a drive source is provided below the frame 105, and a motor pulley 126 is provided on the drive shaft 125 of the tray motor 124. A motor 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 position detector (not shown) detects the position detection slits of the encode plate 122. . The position of the media tray 51 can be detected based on the detection signal from the position detector.

  In the belt driving mechanism 100, when the tray motor 124 is driven and the driving shaft 125 is rotated, the rotational force of the driving shaft 125 is fed to the tray by the motor 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 51 fixed to the tray belt 113 is moved to the apparatus. Is moved in the front-rear direction.

  Here, the media tray 51 is used when printing is performed on the medium M held on the media tray 51 by the inkjet head 61 on the front side (the right side in FIGS. 5 and 6) where the tray driving pulley 111 is disposed. The feed direction. That is, the label printer 11 moves the media tray 51 from the upstream side which is the rear side of the apparatus (left side of FIGS. 5 and 6) to the front side of the apparatus (right side of FIGS. 5 and 6) according to the conveyance command at the time of printing. The label of the medium M is ejected while the inkjet head 61 is scanned on the label surface of the medium M held on the medium tray 51 in a direction orthogonal to the moving direction of the medium M while moving to a certain downstream side. Print processing (information processing) is performed on the surface.

  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.

  As shown in FIGS. 7 and 8, each fixing plate 106 is formed with a window portion 131, and both end portions of the guide shaft 102 are inserted into the window portion 131. Further, an engagement piece 132 is formed on the outer surface of the fixed plate 106 in the vicinity of the window 131, and the engagement piece 132 has a winding spring 135 having a pair of urging bar portions 133 and 134. Is held. One urging bar portion 133 of the winding spring 135 is engaged with an engaging portion 136 formed on the fixed plate 106, and the other urging rod portion 134 is projected outward from the window portion 131. The guide shaft 102 is engaged with an engagement groove 137 formed in the circumferential direction at the end of the guide shaft 102. The guide shaft 102 is urged by a winding spring 135 and is pressed against a corner of the corner formed by the one side 131a and the bottom 131b of the window 131. As a result, the peripheral surface of the guide shaft 102 comes into contact with one side surface 131a and the bottom surface 131b constituting the corner portion of the window portion 131, and is positioned with respect to the fixed plate 106 on which the window portion 131 is formed. By the engagement of the urging bar portion 134 of the winding spring 135 with the mating groove 137, the axial movement is supported in a restricted state.

  Further, as shown in FIG. 9, the media tray 51 has a slide groove 141 formed in a direction orthogonal to the guide shaft 102 on the back surface between the slide bearings 101. 141 is provided with a slidable pressing member 142. The pressing member 142 is integrally formed from a synthetic resin having excellent wear resistance and fatigue resistance, such as polyacetal resin (POM), and the abutting portion 142a at the end on the guide shaft 102 side is a guide. It is in contact with the peripheral surface of the shaft 102.

  The slide groove 141 is provided with a coil spring 143 as a biasing member between the bottom of one end and the pressing member 142, and the pressing member 142 moves toward the guide shaft 102 by the biasing force of the coil spring 143. The contact portion 142 a of the pressing member 142 is pressed against the peripheral surface of the guide shaft 102. Accordingly, the media tray 51 supported by the guide shaft 102 by the slide bearing 101 is supported so as to be slidable in the axial direction with respect to the guide shaft 102 without rattling between the guide shaft 102 and the slide bearing 101.

  As described above, according to the belt driving mechanism of the above-described embodiment, the tray driving pulley 111 is arranged on the front side in the moving direction of the media tray 51 during the printing process on the medium M by the inkjet head 61 as the processing unit. Therefore, the force for moving the media tray 51 is transmitted only through the portion of the tray belt 113 from the media tray 51 to the tray drive pulley 111 on the front side. As described above, the media tray 51 can be moved without passing through the tray driving pulley 111 during the printing process on the medium M, and therefore, compared with the case where the tray driven pulley 112 is disposed on the front side in the moving direction, The influence of disturbances such as eccentricity of the driven pulley 112 and rattling of the shaft support portion can be suppressed as much as possible.

  In addition, the guide shafts 102 provided along the moving direction are fixed to fixed plates 106 provided at both ends of the frame 105, and the media tray 51 is slidably supported by the guide shafts 102. Compared to a conventional structure in which a guide shaft is provided in the media tray 51 along the moving direction and the guide shaft is slidably supported by a bearing on the frame side, the media tray 51 supported by the guide shaft 102 is provided. It is possible to suppress the change in the posture of the media tray 51 due to the change in the bending moment as much as possible by suppressing the change in the bending moment due to the difference in position.

  Thus, since the media tray 51 holding the media M can be moved with high accuracy, the inkjet head 61 can perform printing processing on the media M with high quality.

  Further, since the pressing member 142 is pressed against the guide shaft 102 in a direction orthogonal to the axial direction, rattling between the slide bearing 101 of the media tray 51 and the guide shaft 102 can be suppressed as much as possible. Thereby, the media tray 51 can be moved with higher accuracy.

  Further, by inserting the end portion of the guide shaft 102 through the window portion 131 formed in the fixed plate 106 and urging the guide shaft 102 to the corner portion of the window portion 131 by the winding spring 135, the guide shaft 102 is very easily obtained. Can be supported in a state of being positioned without backlash at both ends thereof.

  Further, by engaging the urging bar portion 134 of the winding spring 135 supported by the fixed plate 106 with the engagement groove 137 of the guide shaft 102, the movement of the guide shaft 102 in the axial direction is very easily restricted. Can be supported.

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 top view which shows the support part of a guide shaft. It is a side view which shows the support part of a guide shaft. It is the perspective view seen from the back surface side which shows the support part of the media tray with respect to a guide shaft.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Publisher (media processing apparatus), 51 ... Media tray (moving body), 61 ... Inkjet head (processing part), 100 ... Belt drive mechanism, 101 ... Slide bearing (bearing), 102 ... Guide shaft, 106 ... Fixed plate , 111 ... tray drive pulley (drive pulley), 112 ... tray driven pulley (driven pulley), 113 ... tray belt (timing belt), 131 ... window, 135 ... winding spring (biasing member), 137 ... engagement groove , 142: pressing member, 143: coil spring (biasing member), M: medium (object to be processed).

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 belt driving mechanism that performs processing by the processing unit on the object to be processed held by the moving body,
The moving body is slidably supported with respect to a guide shaft provided along the moving direction of the moving body by the timing belt, and the moving direction of the moving body when processing the workpiece by the processing unit A belt driving mechanism characterized in that the driving pulley is arranged on the front side. The belt drive mechanism according to claim 1,
The moving body includes a bearing through which the guide shaft is slidably inserted, and a pressing member pressed by a biasing member in a direction perpendicular to the axial direction with respect to the guide shaft. Belt drive mechanism. The belt drive mechanism according to claim 1 or 2,
A pair of opposing fixed plates that support both ends of the guide shaft are provided, and the end portions of the guide shaft are inserted into window portions formed in the fixed plates, and are formed in the window portions by biasing members. A belt driving mechanism characterized in that the guide shaft is biased and positioned at a corner. The belt drive mechanism according to claim 3,
The guide shaft is formed with an engaging groove extending in the circumferential direction in the vicinity of both end portions. The guide shaft is configured such that a part of the urging member supported by the fixing plate is engaged with the engaging groove. A belt driving mechanism characterized in that movement in an axial direction is restricted. 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,
5. The media processing apparatus according to claim 1, wherein the media tray is moved as the moving body by the belt driving mechanism according to claim 1.

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