JP2018140644A - Tape printing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow each defect occurring when connection to a drive motor is switched from a feeding side to a winding side to be eliminated with a simple configuration.SOLUTION: A power transmission mechanism 52 includes: a first clutch mechanism 61 input with power from a drive motor 51; an intermediate gear 62 engaging with a sun gear 72 of the first clutch mechanism 61; a second clutch mechanism 63 input with power from the intermediate gear 62; a winding side gear train 64; a feeding side gear train 65; and a platen side gear train 66. The platen side gear train 66 is always connected to the drive motor 51 via the second clutch mechanism 63. When the drive motor 51 is subjected to normal rotation drive, normal rotation drive of a platen driving shaft 32 and rotation drive in a winding direction of a winding side driving shaft 33 are performed. When the drive motor 51 is subjected to reverse rotation drive, reverse rotation drive of the platen driving shaft 32 and rotation drive in the winding direction of a feeding side driving shaft 34 are performed.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a ribbon feeding device that feeds an ink ribbon in a forward direction and a reverse direction, and a tape printing apparatus including the ribbon feeding device.

Conventionally, as this type of tape printer (printer), a ribbon feeding core (ink ribbon feeding spool) around which an ink ribbon is wound so as to be able to be wound, and a ribbon winding that winds up an ink ribbon that has been wound from the ribbon feeding core. 2. Description of the Related Art There is a known one provided with a bidirectional drive mechanism that rotates a core (ink ribbon take-up spool) and conveys an ink ribbon in the conveyance direction and the reverse conveyance direction (see Patent Document 1). The bidirectional drive mechanism includes a drive motor, an ink ribbon winding gear that supports a ribbon winding shaft that meshes with a ribbon feeding core, an ink ribbon winding gear that supports a ribbon winding shaft that meshes with a ribbon winding core, A pivot drive gear assembly.
The pivot drive gear assembly includes a pivot gear connected to the drive motor via a gear train, a gear plate that rotates with the rotation of the pivot gear, and a first moving gear that is rotatably attached to the gear plate. And a second moving gear. In addition, the first moving gear meshes with the pivot gear, and comes in contact with the ink ribbon take-up gear as the gear plate rotates, and the second moving gear meshes with the first moving gear and the gear. As the plate rotates, it comes in contact with the ink ribbon unwinding gear. In such a bi-directional drive mechanism, when the drive motor is driven to rotate in the forward direction, the gear plate rotates toward the ink ribbon take-up gear, and the first moving gear meshes with the ink ribbon take-up gear. As a result, the drive motor and the ink ribbon winding gear are connected via the gear train, and the ribbon winding core can be rotationally driven by the driving motor. On the other hand, when the drive motor is driven in reverse rotation, the gear plate rotates toward the ink ribbon unwinding gear, and the second moving gear meshes with the ink ribbon unwinding gear. As a result, the drive motor and the ink ribbon unwinding gear are connected via the gear train, and the ribbon feeding core can be rotationally driven by the drive motor. In this way, the connection with the drive motor can be switched between the ink ribbon take-up gear and the ink ribbon take-out gear by forward and reverse rotation drive of the drive motor.

Special table 2007-502221 gazette

However, in the above-described conventional tape printing apparatus, when the connection with the drive motor is switched from the ink ribbon winding gear to the ink ribbon winding gear, the following problems occur.
That is, in this type of tape printer, a tension spring (torque limiter) for applying a certain tension to the ink ribbon is attached between the ink ribbon unwinding gear and the ink ribbon unwinding shaft. Generally, in the conventional tape printer, when the connection with the drive motor is switched from the ink ribbon winding gear to the ink ribbon winding gear, the force (slip torque) accumulated in the tension spring is It interferes with the pivoting gear via the ink ribbon unwinding gear, the second moving gear, and the first moving gear, thereby preventing the pivoting gear from rotating. As a result, a time lag occurs in the rotation of the pivot gear and a time lag also occurs in the rotation of the gear plate, so that the connection cannot be switched quickly.
In the conventional tape printer, the tension applied to the ink ribbon is suddenly released at the timing when the second moving gear is disengaged from the ink ribbon unwinding gear. As a result, there arises a problem that the winding of the ink ribbon is loosened.

  It is an object of the present invention to provide a ribbon feeding device and a tape printer provided with the ribbon feeding device that can eliminate each deficiency that occurs when the connection with the drive motor is switched from the feeding side to the winding side with a simple configuration. It is an issue.

  The ribbon feeding device of the present invention rotationally drives a ribbon feeding core that feeds out an ink ribbon and a ribbon winding core that winds up an ink ribbon fed out from the ribbon feeding core, thereby causing the ink ribbon to move forward and backward. A ribbon feeding device that feeds a driving motor, a feeding-side drive shaft that engages with a ribbon feeding core, a feeding-side power transmission mechanism that transmits input power to the feeding-side driving shaft, and a ribbon winding core. A winding side drive shaft that engages, a winding side power transmission mechanism that transmits input power to the winding side drive shaft, a sun gear, and a planetary gear that meshes with the sun gear and that is in contact with the winding side power transmission mechanism The drive motor is connected to the feeding side power transmission mechanism in accordance with the reverse rotation drive of the drive motor, and the drive motor is connected to the drive motor in the forward rotation drive. The feed-side clutch mechanism that disconnects the connection with the delivery-side power transmission mechanism and the upstream side of the sun gear are connected to the drive motor and the winding-side power transmission mechanism as the drive motor rotates forward. A winding-side clutch mechanism that cuts off the connection between the driving motor and the winding-side power transmission mechanism in association with the reverse rotation driving of the driving motor is provided.

  In this case, the take-up side clutch mechanism has a take-up side sun gear disposed on the upstream side of the sun gear, and a take-up side planetary gear that meshes with the sun gear and that is separated from the feed-side power transmission mechanism. It is preferable.

  A tape printer according to the present invention includes the ribbon feeding device described above.

  According to these configurations, the clutch mechanism is divided into two parts, that is, a feeding side clutch mechanism (feeding side clutch mechanism) and a winding side clutch mechanism (winding side clutch mechanism). In the clutch mechanism, the connection with the drive motor can be disconnected and connected with almost no interference from the tension spring. As a result, when the connection with the drive motor is switched from the feeding side power transmission mechanism to the winding side power transmission mechanism, the driving motor and the winding side power transmission mechanism can be quickly connected, and the feeding side power transmission Switching from the mechanism to the winding side power transmission mechanism can be performed quickly. Further, since the take-up side clutch mechanism operates slightly earlier than the feed-side clutch mechanism, the drive motor and the take-up side power transmission mechanism are connected before the connection between the drive motor and the feed-side power transmission mechanism is cut off. It becomes the composition which becomes. That is, at the time of switching, the power transmission mechanism is temporarily connected. Therefore, the tension applied to the ink ribbon is gently released without being suddenly released, and the loose winding of the ink ribbon can be prevented. As described above, each deficiency that occurs when the connection with the drive motor is switched from the feeding side to the winding side can be eliminated with a simple configuration.

It is the external appearance perspective view which showed the tape printer of the closed state concerning this embodiment. It is the external appearance perspective view which showed the tape printer of the open state. It is the plane sectional view showing the cartridge mounting part and the tape cartridge with which it was mounted. It is the perspective view which showed the feed power system. It is the top view which showed the feed power system. (A) is explanatory drawing for demonstrating the reverse feed drive operation | movement by a feed power system, (b) is explanatory drawing for demonstrating the normal feed drive operation by a feed power system.

  Hereinafter, a ribbon feeder and a tape printer provided with the ribbon feeder according to an embodiment of the present invention will be described with reference to the accompanying drawings. This tape printing apparatus performs printing while feeding out a printing tape and an ink ribbon from a mounted tape cartridge, cuts a printed portion of the printing tape, and creates a label (tape piece).

  As shown in FIGS. 1 and 2, the tape printing apparatus 1 has an outer shell formed of an apparatus case 11, and a keyboard 12 having various keys is disposed on the upper surface of the front half of the apparatus case 11. On the other hand, an opening / closing lid 13 is widely provided on the upper left surface of the rear half of the device case 11, and a lid opening button 14 for opening the opening / closing lid 13 is provided on the front side of the opening / closing lid 13. Further, a rectangular display 15 for displaying an input result from the keyboard 12 and the like is disposed on the upper right side of the rear half of the device case 11.

  When the lid opening button 14 is pressed to open the opening / closing lid 13, a cartridge mounting portion 21 into which the tape cartridge C is detachably mounted is formed in the inside thereof. The tape cartridge C is mounted on the cartridge mounting portion 21 with the opening / closing lid 13 being opened.

  A tape discharge port 22 connected to the cartridge mounting portion 21 is formed on the left side of the apparatus case 11, and a tape discharge path 23 is formed between the cartridge mounting portion 21 and the tape discharge port 22. A tape cutter 24 is built in the device case 11 so as to face the tape discharge path 23.

  As shown in FIGS. 2 and 3, the cartridge mounting portion 21 includes a thermal type print head 31 housed in a head cover 30, a platen drive shaft 32 that faces the print head 31, and a ribbon take-up core described later. A winding-side drive shaft 33 that engages with 43, a feeding-side drive shaft 34 that engages with a ribbon feeding core 42 described later, and a positioning projection 35 of a tape reel 41 described later are disposed. FIG. 3 is a plan sectional view of the tape cartridge C cut at the center in the vertical direction. The platen drive shaft 32, the take-up drive shaft 33, and the feed-out drive shaft 34 pass through the bottom plate 21a of the cartridge mounting portion 21, and the platen drive shaft 32, the take-up drive shaft are placed in the lower space of the bottom plate 21a. 33 and a feed power system 36 (see FIG. 4) for rotationally driving the feed-side drive shaft 34 are provided. Details of the feed power system 36 will be described later. The “ribbon feeding device” includes a winding side drive shaft 33, a feeding side drive shaft 34, and a feed power system 36.

  The print head 31 is constituted by a thermal print head in which a plurality of heating elements (not shown) are arranged vertically. That is, by individually driving the heat generating elements provided in the print head 31 in a state where the print tape T and the ink ribbon R are sandwiched between the print head 31 and a platen roller 44 described later, The ink on the ink ribbon R is thermally transferred to the printing tape T in dot units.

  On the other hand, the tape cartridge C includes a tape reel 41 that is wound so that the printing tape T can be fed, a ribbon feeding core 42 that is wound so that the ink ribbon R can be fed, and an ink ribbon R that is fed from the ribbon feeding core 42. It has a ribbon winding core 43 that winds up, a platen roller 44 that faces the print head 31, and a cartridge case 45 that accommodates these. The cartridge case 45 is formed with a head opening 46 through which the head cover 30 is inserted.

  When the tape cartridge C is mounted on the cartridge mounting portion 21, the head opening 46 is inserted into the head cover 30, and the center hole of the tape reel 41 is inserted into the positioning protrusion 35. At the same time, the center hole of the platen roller 44 is fitted to the platen drive shaft 32, the center hole of the ribbon take-up core 43 is fitted to the take-up drive shaft 33, and the feed-side drive shaft 34 is fitted. The center hole of the ribbon feeding core 42 is fitted.

  As shown in FIG. 3, the printing tape T is fed out from the tape reel 41 inserted into the positioning protrusion 35, passes through the opposing position between the print head 31 and the platen roller 44, and then is fed out to the tape discharge path 23 ( Tape feed path). On the other hand, the ink ribbon R is fed from a ribbon feeding core 42 fitted to the feeding side drive shaft 34, passes through a facing position between the print head 31 and the platen roller 44, and then circulates around the peripheral wall of the head opening 46. The ribbon is wound around the ribbon winding core 43 fitted to the winding drive shaft 33 (ribbon feeding path).

  On the other hand, the platen roller 44 fitted to the platen drive shaft 32 feeds the print tape T in the forward direction and the reverse direction by rotational driving while sandwiching the print tape T and the ink ribbon R together with the print head 31. On the other hand, the ribbon take-up core 43 engaged with the take-up side drive shaft 33 is driven to rotate in synchronization with the forward feed by the platen roller 44 and winds up the ink ribbon R. The ribbon feeding core 42 engaged with the feeding-side drive shaft 34 is driven to rotate in synchronization with the reverse feed by the platen roller 44 and winds up (rewinds) the ink ribbon R. Thus, the printing tape T and the ink ribbon R are fed in the forward direction and the reverse direction.

  In the label producing operation of this embodiment, first, the printing tape T and the ink ribbon R are reversely fed, and the leading end of the printing tape T is pulled back to the printing position by the printing head 31. Thereafter, the print head 31 is driven while the print tape T and the ink ribbon R are forwardly fed to perform a print process on the print tape T. When the printing process is completed, the printed portion of the printing tape T is cut by the tape cutter 24. As a result, it is possible to create a label having no margin due to the distance between the head and the cutter.

  Here, the details of the feed power system 36 will be described with reference to FIGS. As shown in FIGS. 4 and 5, the feed power system 36 includes a drive motor 51 that can rotate forward and backward as a power source, and the rotational power of the drive motor 51 for the platen drive shaft 32, the take-up drive shaft 33, and the feed-out. And a power transmission mechanism 52 that transmits to the side drive shaft 34. That is, in the present embodiment, the drive motor 51 is shared as a drive source for the platen drive shaft 32, the winding side drive shaft 33, and the feeding side drive shaft 34. The drive motor 51 is controlled to be switched between forward rotation drive and reverse rotation drive by the control unit.

  The power transmission mechanism 52 includes a first clutch mechanism 61 (winding side clutch mechanism) to which power is input from the drive motor 51, an intermediate gear 62 that meshes with the sun gear 72 of the first clutch mechanism 61, and power from the intermediate gear 62. And a second clutch mechanism 63 (feeding-side clutch mechanism). Further, the power transmission mechanism 52 transmits the input power to the winding side drive shaft 33 and transmits the input power to the feeding side drive shaft 34. The feeding side gear train 65 (feeding side power transmission mechanism) and the platen side gear train 66 for transmitting the input power to the platen drive shaft 32 are provided. The first clutch mechanism 61 separates and connects the connection between the drive motor 51 and the take-up side gear train 64, and the second clutch mechanism 63 separates and connects the connection between the drive motor 51 and the delivery side gear train 65. On the other hand, the platen side gear train 66 is connected to the clutch input gear 81 of the second clutch mechanism 63 and is always connected to the drive motor 51.

  The first clutch mechanism 61 includes a clutch input gear 71, a sun gear 72 (winding side sun gear), a planetary gear 73 (winding side planetary gear), and a carrier 74 (clutch lever). . The clutch input gear 71 meshes with a gear 51 a formed on the drive shaft of the drive motor 51. The sun gear 72 is fixed to the lower side of the clutch input gear 71 coaxially with the clutch input gear 71. The planetary gear 73 meshes with the sun gear 72. The carrier 74 rotatably supports the planetary gear 73 and is supported so as to be able to rotate along the same axis as the sun gear 72. When the drive motor 51 is driven to rotate forward, the sun gear 72 rotates in the forward direction via the clutch input gear 71, and the carrier 74 moves to the left in FIG. Rotate (turn around). Thereby, the planetary gear 73 supported by the carrier 74 meshes with the input gear (winding side input gear 91) of the winding side gear train 64, and the drive motor 51 and the winding side gear train 64 are connected. On the other hand, when the drive motor 51 is driven in reverse rotation, the sun gear 72 rotates in the reverse direction via the clutch input gear 71, and the carrier 74 is rotated as the sun gear 72 rotates in the reverse direction. 5 (turns around) to the right. As a result, the planetary gear 73 supported by the carrier 74 is disengaged from the winding side input gear 91 and the connection between the drive motor 51 and the winding side gear train 64 is released. As described above, the first clutch mechanism 61 connects and disconnects the drive motor 51 and the winding side gear train 64 in accordance with forward and reverse rotation of the drive motor 51.

  Further, as described above, the sun gear 72 of the first clutch mechanism 61 is engaged with the intermediate gear 62, and the sun gear 72 is connected to the second clutch mechanism 63 via the intermediate gear 62. Therefore, the power of the drive motor 51 is input from the sun gear 72 to the second clutch mechanism 63 via the intermediate gear 62 regardless of whether the rotational drive of the drive motor 51 is forward or reverse.

  The second clutch mechanism 63 includes a clutch input gear 81, a sun gear 82, a planetary gear 83, and a carrier 84. The clutch input gear 81 meshes with the intermediate gear 62. The sun gear 82 is fixed to the lower side of the clutch input gear 81 on the same axis as the clutch input gear 81. The planetary gear 83 meshes with the sun gear 82. The carrier 84 rotatably supports the planetary gear 83 and is supported so as to be able to rotate along with the sun gear 82. When the drive motor 51 is driven to rotate in the reverse direction, the sun gear 82 rotates in the forward direction via the clutch input gear 71, the sun gear 72, the intermediate gear 62, and the clutch input gear 81. Along with the rotation, the carrier 84 rotates (follows) downward in FIG. As a result, the planetary gear 83 supported by the carrier 84 meshes with the input gear (feeding side input gear 101) of the feeding side gear train 65, and the drive motor 51 and the feeding side gear train 65 are connected. On the other hand, when the drive motor 51 is driven to rotate in the forward direction, the sun gear 82 rotates in the reverse direction via the gears, and the carrier 84 is rotated in the reverse direction as the sun gear 82 rotates in the reverse direction. Turn (move) to the middle upper side. As a result, the planetary gear 83 supported by the carrier 84 is disengaged from the feeding-side input gear 101 and the connection between the drive motor 51 and the feeding-side gear train 65 is released. In this way, the connection between the drive motor 51 and the feed-out side gear train 65 is separated by the second clutch mechanism 63 in accordance with forward / reverse rotation of the drive motor 51.

  The winding side gear train 64 includes a winding side input gear 91, a winding side first intermediate gear 92, a winding side second intermediate gear 93, a winding side third intermediate gear 94, and a winding side first gear. 4 intermediate gear 95, take-up side fifth intermediate gear 96, take-up side sixth intermediate gear 97, and take-up side output gear 98. The winding side input gear 91 meshes with the planetary gear 73 of the first clutch mechanism 61. The winding side first intermediate gear 92 is fixed to the lower side of the winding side input gear 91 coaxially with the winding side input gear 91. The winding side second intermediate gear 93 meshes with the winding side first intermediate gear 92. The winding side third intermediate gear 94 meshes with the winding side second intermediate gear 93. The winding side fourth intermediate gear 95 is fixed to the upper side of the winding side third intermediate gear 94 coaxially with the winding side third intermediate gear 94. The winding side fifth intermediate gear 96 meshes with the winding side fourth intermediate gear 95. The winding side sixth intermediate gear 97 is fixed to the lower side of the winding side fifth intermediate gear 96 coaxially with the winding side fifth intermediate gear 96. The winding side output gear 98 meshes with the winding side sixth intermediate gear 97 and supports the winding side drive shaft 33. With such a configuration, the power input from the planetary gear 73 of the first clutch mechanism 61 to the winding side input gear 91 is transmitted to the winding side drive shaft 33. The take-up-side second intermediate gear 93 is arranged coaxially with the clutch input gear 81 and the sun gear 82 of the second clutch mechanism 63 and immediately below the clutch input gear 81. The take-up side second intermediate gear 93 is rotatable independently of the clutch input gear 81 and the sun gear 82 of the second clutch mechanism 63.

  A tension spring (torsion spring type torque limiter) is attached between the winding side drive shaft 33 and the winding side output gear 98 (not shown). The take-up drive shaft 33 is urged to rotate in the take-up direction by the tension spring, whereby a predetermined tension is applied to the ink ribbon R.

  The feeding side gear train 65 has a feeding side input gear 101, a feeding side intermediate gear 102, and a feeding side output gear 103. The feeding side input gear 101 meshes with the planetary gear 83 of the second clutch mechanism 63. The feeding side intermediate gear 102 is fixed to the lower side of the feeding side input gear 101 coaxially with the feeding side input gear 101. The feeding-side output gear 103 meshes with the feeding-side intermediate gear 102 and supports the feeding-side drive shaft 34. With such a configuration, the power input from the planetary gear 83 of the second clutch mechanism 63 to the take-up side input gear 91 is transmitted to the supply side drive shaft 34. A tension spring 104 (torsion spring type torque limiter) is attached between the feeding side drive shaft 34 and the feeding side output gear 103. The feeding-side drive shaft 34 is urged to rotate in the winding direction by the tension spring, whereby a predetermined tension is applied to the ink ribbon R.

  The platen side gear train 66 includes a platen side input gear 111, a platen side first intermediate gear 112, a platen side second intermediate gear 113, a platen side third intermediate gear 114, and a platen side output gear 115. doing. The platen side input gear 111 meshes with the clutch input gear 81 of the second clutch mechanism 63. The platen side first intermediate gear 112 is fixed on the upper side of the platen side input gear 111 coaxially with the platen side input gear 111. The platen side second intermediate gear 113 meshes with the platen side first intermediate gear 112. The platen side third intermediate gear 114 is fixed to the upper side of the platen side second intermediate gear 113 coaxially with the platen side second intermediate gear 113. The platen side output gear 115 meshes with the platen side third intermediate gear 114 and supports the platen drive shaft 32. With such a configuration, the power input from the clutch input gear 81 of the second clutch mechanism 63 to the platen side input gear 111 is transmitted to the platen drive shaft 32.

  Next, with reference to FIG. 6, the forward feed drive operation and the reverse feed drive operation by the feed power system 36 will be described. First, the reverse feed driving operation will be described with reference to FIG. In this reverse feed drive operation, the platen drive shaft 32 and the feed side are driven while the drive motor 51 is driven to rotate in reverse and the connection with the drive motor 51 is switched from the winding side drive shaft 33 side to the feed side drive shaft 34 side. The drive shaft 34 is rotationally driven. Here, the carrier 74 of the first clutch mechanism 61 is rotated to the left side in the drawing so that the planetary gear 73 is engaged with the winding side gear train 64 and the carrier 84 of the second clutch mechanism 63 is on the upper side in the drawing. It is assumed that the rotation is performed in a state where the planetary gear 83 is detached from the feeding side gear train 65.

As shown in FIG. 6A, when the drive motor 51 is driven in reverse rotation, the power is input to the clutch input gear 71 of the first clutch mechanism 61. In the first clutch mechanism 61, the clutch input gear 71 is rotated by the input power, and the sun gear 72 fixed thereto is rotated in the reverse direction. When the sun gear 72 rotates in the reverse rotation direction, the carrier 74 rotates with the rotation of the sun gear 72 to the right side in the figure, and the planetary gear 73 is disengaged from the winding side input gear 91 of the winding side gear train 64. As a result, the connection between the drive motor 51 and the winding side gear train 64 is released.
On the other hand, the power accompanying the reverse rotation drive of the drive motor 51 is input from the sun gear 72 of the first clutch mechanism 61 to the clutch input gear 81 of the second clutch mechanism 63 via the intermediate gear 62.

  In the second clutch mechanism 63, the clutch input gear 81 is rotated by the input power, and the sun gear 82 fixed thereto is rotated in the forward rotation direction. When the sun gear 82 rotates in the forward rotation direction, the carrier 84 rotates along with this rotation, and the planetary gear 83 meshes with the feeding-side input gear 101 of the feeding-side gear train 65. As a result, the drive motor 51 and the supply side gear train 65 are connected. As a result, the power of the drive motor 51 is transmitted to the delivery side gear train 65 and is transmitted to the delivery side drive shaft 34, so that the delivery side drive shaft 34 is rotated by the reverse rotation drive of the drive motor 51. As a result, the ribbon feeding core 42 engaged with the feeding side drive shaft 34 is rotationally driven in the winding direction.

  Further, the power accompanying the reverse rotation drive of the drive motor 51 is input to the platen side gear train 66 from the clutch input gear 81 of the second clutch mechanism 63. Thus, power is transmitted to the platen drive shaft 32 via the platen side gear train 66, and the platen drive shaft 32 rotates in the reverse direction. As a result, the platen roller 44 engaged with the platen drive shaft 32 is driven in reverse rotation. As described above, the reverse rotation driving of the platen roller 44 and the rotation driving of the ribbon feeding core 42 in the winding direction are performed simultaneously and synchronously. As a result, the printing tape T and the ink ribbon R are fed back.

  Next, the forward feed driving operation will be described with reference to FIG. In this forward feed driving operation, the drive motor 51 is driven to rotate in the forward direction, and the connection with the drive motor 51 is switched from the feeding side driving shaft 34 side to the winding side driving shaft 33 side, while the platen driving shaft 32 and the winding side are switched. The side drive shaft 33 is rotationally driven. Here, the carrier 74 of the first clutch mechanism 61 rotates to the right side in the drawing, and the planetary gear 73 is disengaged from the take-up gear train 64, and the carrier 84 of the second clutch mechanism 63 is in the lower side in the drawing. It is assumed that the rotation is performed from the state in which the planetary gear 83 is engaged with the feeding-side gear train 65.

As shown in FIG. 6 (b), when the drive motor 51 is driven to rotate in the forward direction, the power is input to the clutch input gear 71 of the first clutch mechanism 61. In the first clutch mechanism 61, the clutch input gear 71 is rotated by the input power, and the sun gear 72 fixed thereto is rotated in the forward rotation direction. When the sun gear 72 rotates in the forward rotation direction, the carrier 74 rotates with the rotation of the sun gear 72 to the left in the figure, and the planetary gear 73 meshes with the winding side input gear 91 of the winding side gear train 64. As a result, the drive motor 51 and the winding side gear train 64 are connected. As a result, the power of the drive motor 51 is transmitted to the winding side gear train 64 and is transmitted to the winding side drive shaft 33, so that the winding side drive shaft 33 is rotated by the forward rotation drive of the drive motor 51. As a result, the ribbon winding core 43 engaged with the winding side drive shaft 33 is rotationally driven in the winding direction.
On the other hand, the power accompanying the forward rotation drive of the drive motor 51 is input from the sun gear 72 of the first clutch mechanism 61 to the clutch input gear 81 of the second clutch mechanism 63 via the intermediate gear 62.

  In the second clutch mechanism 63, the clutch input gear 81 is rotated by the input power, and the sun gear 82 fixed thereto is rotated in the reverse direction. When the sun gear 82 rotates in the reverse rotation direction, the carrier 84 rotates with the rotation of the sun gear 82 and the planetary gear 83 is disengaged from the feeding-side input gear 101 of the feeding-side gear train 65. As a result, the connection between the drive motor 51 and the feeding side gear train 65 is released.

  Further, power accompanying the forward rotation drive of the drive motor 51 is input from the clutch input gear 81 of the second clutch mechanism 63 to the platen side gear train 66. Thus, power is transmitted to the platen drive shaft 32 via the platen side gear train 66, and the platen drive shaft 32 rotates in the forward rotation direction. As a result, the platen roller 44 engaged with the platen drive shaft 32 is driven to rotate forward. As described above, the forward rotation driving of the platen roller 44 and the rotational driving of the ribbon winding core 43 in the winding direction are performed simultaneously and synchronously. As a result, the printing tape T and the ink ribbon R are fed forward.

According to the configuration as described above, the clutch mechanism is divided into the first clutch mechanism 61 and the second clutch mechanism 63, so that the first clutch mechanism 61 hardly receives interference from the tension spring 104 on the feeding side. In addition, the connection with the drive motor 51 can be separated. Thereby, when switching the connection with the drive motor 51 from the supply side drive shaft 34 side to the winding side drive shaft 33 side, the drive motor 51 and the winding side gear train 64 can be quickly connected. Switching from the feeding side drive shaft 34 side to the winding side drive shaft 33 side can be performed quickly. In particular, as in the above-described embodiment, when the printing tape T is reversely fed and the leading end of the printing tape T is once pulled back to the printing position by the printing head 31, the printing tape T is forwardly fed to perform printing processing. Then, after the front end portion of the printing tape T is pulled back, the printing process can be immediately started.
Further, since the first clutch mechanism 61 operates slightly earlier than the second clutch mechanism 63, before the connection between the drive motor 51 and the feeding side gear train 65 is disconnected, the drive motor 51 and the winding side gear train 64 Are connected. That is, when switching, both the gear trains 64 and 65 are temporarily connected. For this reason, the tension applied to the ink ribbon R is released gently without being suddenly released, so that loose winding of the ink ribbon R can be prevented. As described above, each deficiency that occurs when the connection with the drive motor 51 is switched from the feeding side to the winding side can be eliminated with a simple configuration.

  In the above-described embodiment, the first clutch mechanism 61 on the winding side is disposed upstream of the sun gear 82 of the second clutch mechanism 63 on the feeding side. The second clutch mechanism 63 on the feeding side may be disposed on the upstream side of the sun gear 72 of the clutch mechanism 61. That is, in the above embodiment, priority is given to eliminating each deficiency (switching delay, etc.) that occurs when the connection with the drive motor 51 is switched from the feeding side to the winding side. Since the tension spring is attached, the same deficiencies occur when switching from the winding side to the feeding side. On the other hand, giving priority to eliminating each deficiency that occurs when switching from the winding side to the feeding side, the second clutch mechanism on the feeding side is arranged upstream of the sun gear 72 of the first clutch mechanism 61 on the winding side. A configuration in which 63 is provided is also conceivable.

  Further, the second gear train branched from the gear train reaching the second clutch mechanism 63 on the feeding side is provided, and the first clutch mechanism 61 on the take-up side is disposed on the second gear train. May be. That is, the gear train may be bifurcated on the upstream side of the clutch mechanisms 61 and 63, and the clutch mechanisms 61 and 63 may be disposed in the gear trains of the branch branches. According to this configuration, when the connection with the drive motor 51 is switched from the supply side to the take-up side, the first clutch mechanism 61 is hardly affected by the tension spring 104 attached to the supply side drive shaft 34. The drive motor 51 and the winding side gear train 64 can be connected. At the same time, when the connection with the drive motor 51 is switched from the take-up side to the feed-out side, the second clutch mechanism 63 is not substantially affected by the tension spring attached to the take-up drive shaft 33, and the drive motor 51 and the feeding side gear train 65 can be connected. Therefore, each deficiency when switching the connection with the drive motor 51 from the feeding side to the winding side and each deficiency when switching the connection with the drive motor 51 from the winding side to the feeding side can be eliminated at the same time. .

  32 ... Platen drive shaft, 33 ... Winding side drive shaft, 34 ... Feeding side drive shaft, 35 ... Positioning projection, 36 ... Feed power system, 51 ... Drive motor, 51a ... Gear, 52 ... Power transmission mechanism, 61 ... First 1 clutch mechanism, 62 ... intermediate gear, 63 ... second clutch mechanism, 64 ... winding side gear train, 65 ... feeding side gear train, 66 ... platen side gear train, 71 ... clutch input gear, 72 ... sun gear, 73 ... Planetary gear, 74 ... Carrier, 81 ... Clutch input gear, 82 ... Sun gear, 83 ... Planetary gear, 84 ... Carrier, 91 ... Winding side input gear, 92 ... Winding side first intermediate gear, 93 ... Winding Side second intermediate gear, 94: winding side third intermediate gear, 95 ... winding side fourth intermediate gear, 96 ... winding side fifth intermediate gear, 97 ... winding side sixth intermediate gear, 98 ... winding Side output gear, 101 ... feeding side Force gear, 102 ... Feeding side intermediate gear, 103 ... Feeding side output gear, 111 ... Platen side input gear, 112 ... Platen side first intermediate gear, 113 ... Platen side second intermediate gear, 114 ... Platen side third intermediate gear 115 ... Platen side output gear.

Claims (3)

A drive motor;
A platen drive shaft that engages with the platen roller and conveys the printing tape;
A feeding-side drive shaft that engages with a ribbon feeding core wound with an ink ribbon and feeds the ink ribbon;
A winding side drive shaft that engages with a ribbon winding core and winds up the ink ribbon;
A tape printing apparatus comprising: a rotational power transmission mechanism that transmits power of the drive motor to the platen drive shaft, the feeding side drive shaft, and the winding side drive shaft;
The rotational power transmission mechanism includes a first clutch mechanism that receives power from the drive motor, an intermediate gear that meshes with a sun gear of the first clutch mechanism, and a second clutch mechanism that receives the power from the intermediate gear. A winding-side gear train that transmits the power to the winding-side drive shaft, a feeding-side gear train that transmits the power to the feeding-side driving shaft, and a platen side that transmits the power to the platen driving shaft A gear train, and
The platen side gear train is always connected to the drive motor via the second clutch mechanism,
When the drive motor is driven to rotate forward, the platen drive shaft is rotated forward and the winding drive shaft is driven to rotate in the winding direction.
A tape printing apparatus, wherein when the drive motor is driven in reverse rotation, reverse rotation drive of the platen drive shaft and rotation drive in the winding direction of the feeding side drive shaft are performed. When the drive motor is driven to rotate in the forward direction, the drive motor and the winding side gear train are connected via the first clutch mechanism, and the drive motor and the feeding side gear are further connected via the second clutch mechanism. The column is disconnected,
When the drive motor is driven in reverse rotation, the connection between the drive motor and the take-up gear train is released via the first clutch mechanism, and the drive motor and the payout are further passed via the second clutch mechanism. 2. The tape printer according to claim 1, wherein a side gear train is connected.   The apparatus further comprises a mounting portion for detachably mounting a tape cartridge containing the platen roller, the printing tape wound around the tape core, the ribbon feeding core, and the ribbon winding core. The tape printer according to claim 1 or 2.

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