JPS60229782A - Printer - Google Patents

Abstract

PURPOSE:To simplify the construction by performing selective switching between the selective action of a type support element and the shifting operation of the carriage and the ribbon shifting operation in linkage with one driving source such as solenoid. CONSTITUTION:When a printing signal is inputted, a switching solenoid 36 is excited and a selecting section 32 turns to the selective action switching position to block the movement of the carriage 5 while moving a feed pawl member 46 to the standby position through a link pin 38. Under such a condition, when the type support element is turned selectively, the solenoid 36 is demagnetized subsequently and a member 32 is turned to the shifting operation switching position to block the rotation of the type support element while the feed pawl member 46 is turned to the actuating position with a spring 48 to rotate a rotating shaft 39 intermittently through a pawl wheel 45 thereby performing a printing while turning a ribbon takeup reel 28 by a specified value.

Description

Detailed Description of the Invention Technical Field The present invention relates to a printing device, and more particularly to a printing device in which a carriage rotatably supports a type carrying element that holds a large number of type characters relative to a platen mounted on a machine frame. The present invention relates to a printing device configured such that a transfer movement for transferring the type and a selection operation for selecting a desired type by rotationally indexing the type supporting element are selectively performed in conjunction with one electric motor. It is.

OBJECTS OF THE INVENTION It is an object of the present invention to perform selective switching between a character carrying element selection operation and a carriage transport operation, and a ribbon transport operation.
It is an object of the present invention to provide a printing device which can be operated in conjunction with one driving source such as a solenoid and which can simplify the configuration.

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention includes a selection member which is movably provided on a carriage and is configured to switch between the transfer operation and the selection operation selectively; A ribbon is housed in a ribbon cassette supported on the carriage and a part of the ribbon is placed between the platen and the type; and ribbon feeding means for transporting the ribbon by a predetermined amount.

Example Embodiments of the present invention will be described below with reference to the drawings.

In this embodiment, a platen 2 is rotatably mounted on the machine frame 1, and printing paper (not shown) can be supported around the outer periphery thereof. A guide rod 3 as a guide body is provided on the machine frame 1 so as to extend parallel to the platen 2.
and a guide plate 4 are provided, and a carriage 5 is supported on the guide rod 3 and guide plate 4 so as to be movable along them.

A shaft 6 is rotatably supported on a substantially horizontal axis extending in the front-rear direction, and a type supporting element 7 having a large number of type characters 7a is attached to the tip of the shaft 6 facing the platen 2.

As shown in FIG. 1.2, a fixed mounting plate 8 is fixed to the right side surface of the machine frame 1, and a pulley 9 is rotatably supported on the outer side thereof. A movable mounting plate 10 is installed on the left side of the machine frame 1.
is rotatably supported with its vertically central engagement protrusion 10a engaged with a small hole in the machine frame 1, and a pulley 11 is rotatably supported on its outer side. 4-↑・An endless timing belt 12 is hung between both pulleys 9 and 11 so as to intersect the ridge 5 and extend parallel to the platen 2. A spring 13 is hung between the movable mounting plate 10 and the machine frame 1, and is configured to rotate and bias the movable mounting plate 10 in the counterclockwise direction in FIG. 2 to apply tension to the timing bell 1-. It has become.

As shown in FIGS. 1 and 2, one electric fi 14 consisting of a step motor is attached to the fixed mounting plate 8, and a driving m wheel 15 on the motor shaft and a driven tooth width 16 on the pulley 9 are mounted on the fixed mounting plate 8.
The timing belt 12 is rotated via. Then, by the rotation of the timing belt 12 based on the electric motor 14, a transfer operation is performed to transfer the carriage 5 to the platen 2, and a transfer operation is performed to transfer the carriage 5 to the platen 2.
A selection operation in which a predetermined type 7a is selected at a predetermined printing position corresponding to the platen 2 by rotationally indexing can be performed selectively.

As shown in FIG. 1.4.5, a hammer 17 is rotatably supported on the carriage 5 by a support shaft 18 in correspondence with the type carrying element 7, and a drive bottle 19 projects from the upper end side of the hammer 17. It is set up. There is a spring 20 between the hammer 17 and the carriage 5)! ), and its spring force always keeps the hammer 17 biased in its original, substantially vertical position shown by the solid line in FIG. 4-5. -Fl as shown in Figures 2 and 5
- A solenoid 21 for printing is installed on the ridge 5,
With the excitation, the armature 22 is rotated clockwise in FIG. 5 against the action of the spring 23, and the hammer 17 is rotated counterclockwise in the figure via the drive pin 19 to bring it to the printing position. One type character 7 on a selectively arranged type carrier element 7
a is pushed toward the platen 2.

In this embodiment, the hammer 17 is rotated by the rotation of the armature 22 based on the excitation of the solenoid 21, from the original position as shown by the solid line in FIG. It is designed to be rotated to position B shown by a chain line.

As shown in FIG. 1, a ribbon cassette 24 is supported on the carriage 5, and a ribbon cassette 25 is stored inside the ribbon cassette 25 wound around a supply reel 26. and,
A part of this ribbon 25 is exposed outside the ribbon cassette 24 and is placed between the platen 2 and the type 7a, and when the hammer 17 presses the type 7a, the ribbon 25 is exposed to the outside of the ribbon cassette 24.
Printing is performed on the printing paper on the platen 2 via the printing paper 5. Further, this ribbon 25 is transported by a predetermined amount by a feed roller 27 provided in the ribbon cassette 24 for each printing operation, and is wound onto a take-up reel 28.

On the other hand, as shown in FIGS. 2 to 4, a transmission gear 29 is fixed to the rotating shaft 6 on the carriage 5, and is located between the upper and lower belt pieces of the timing belt 12 and engages with the lower belt piece. I'm starting to get it. A pair of guide rollers 30 are rotatably supported on the carriage 5 near both sides of the transmission gear 29, and as shown in FIG. .29 is designed to engage over a wide range. Therefore, the rotation of the timing belt 12 based on the electric motor 14 rotationally drives the rotating shaft 6 via the transmission gear 29.

As shown in FIGS. 2 to 4, a pawl width 31 is fixed to the end surface of the transmission gear 29, and the rotation of the rotating shaft 6 can be prevented through the pawl width 31.

The carriage 5 is selectively switched between a transfer operation of the carriage 5 and a selection operation of the type carrying element 7 so that it can rotate in a substantially perpendicular plane passing through the axis of the rotating shaft 6 below the claw width 31. The selection member 32 for
It is rotatably supported by 3. As shown in FIGS. 2 and 4, a claw 1 portion 32a that can be engaged with a claw piece of the claw width 31 is formed at the upper end of the selection member 32, and a carriage 5 is mounted on the machine frame 1 at the lower end of the selection member 32. An engaging portion 34b that can be engaged with a rubber engaging body 34 provided over a movement range of
is formed, and an operating piece 32c extends from the right side.

A spring 35 is suspended between the selection member 32 and the carriage 5, and applies a rotational force to the selection member 32 in the clockwise direction in FIG. 4. Due to the action of this spring 35, the selection member 32 is always engaged from below with one of the claw pieces of the claw width 31 at its claw portion 32a, as shown by the solid line in FIG. It is biased and held at the transfer operation switching position where the transfer operation is prevented. A switching solenoid 36 is mounted on the carriage 5, and an operating piece 32C of the selection member 32 is connected to the armature 37 by a connecting pin 38. As the solenoid 36 is energized, the selection member 32 is moved to the transfer operation switching position shown by the solid line in FIG.
The carriage 5 is rotated in the counter-time-scheduled direction from the position shown in FIG. It is set to be placed.

Further, in this embodiment, with the selection member 32 disposed at the transfer operation switching position, the timing belt 12 is rotated with the rotation of the electric motor 11114, so that the carriage 5 is moved between the guide rod 3 and the guide plate 4. Stay overnight and move on.

Further, with the selection member 32 disposed at the selection operation switching position, the timing belt 12 is rotated as the electric motor 14 rotates.
By this rotation, character selection rotation of the character carrying element 7 is performed.

Next, the configuration of the ribbon feeding device will be explained according to FIG. 6.7. A rotary shaft 39 is rotatably supported on the carriage 5 on the right side of the selection member 32 about a substantially perpendicular axis, and the upper end of the rotating shaft 39 is A drive gear 40 is attached to. As the rotation shaft 39 rotates, the feed roller 27 in the ribbon force set 1-24 is rotated via the transmission gear 41 provided on the carriage 5.
The take-up wheel 28 in the ribbon cassette 24 is rotated via the transmission gears 42 and 43 on the carriage 5, and the ribbon 2 is rotated.
5 transfers are now taking place.

Note that a clutch 44 is provided between the transmission gear 43 and the take-up reel 28, and the winding diameter of the ribbon 25 on the take-up reel 28 is increased so that the amount of ribbon wound by the take-up reel 28 is equal to that of the feed roller. When the ribbon feed amount becomes larger than the ribbon feed amount by 27, slipping occurs in this clutch 44 portion.

A pawl width 45 is fitted and fixed to the lower end of the rotating shaft 39, and a large number of pawl pieces are attached to the outer periphery of the pawl width 45.

A feeding claw member 46 as a ribbon feeding means is supported on the carriage 5 on the side of the claw width 45 by a support shaft 47 so as to be rotatable and movable in the axial direction. A pawl portion 46a is formed to engage with the pawl piece and rotate the pawl medium 45 intermittently, and the other end engages with the connecting pin 38 on the operating piece 32C of the selection portion 1132. An engagement piece 46b is formed. A spring 48 is wound around a support shaft 47 on one side of the feed claw member 46, and the action of this spring 48 causes the feed claw member 46 to
A rotational force in the counterclockwise direction in FIG. 6 and a force for moving forward along the support shaft 47 are applied. As a result, the feed pawl member 46 always has a pawl width 45 as shown by the solid line in FIGS.
is held in the operating position with intermittent rotation.

When the selection member 32 is rotated from the transfer operation switching position shown by the solid line in FIG. 4 to the selection operation switching position shown by the chain line in FIG. The feed pawl member 46 is rotated and laterally moved to the standby position shown by the chain line in FIGS. 6 and 7, and after the printing operation is completed, the selection member 32 is moved to the selection operation switching position shown by the chain line in FIG. 4 based on the demagnetization of the solenoid 36. 1 to the transfer operation switching position shown by the solid line, the feed claw member 46 moves to the sixth position by the action of the spring 48 following the connecting bin 38.
The ribbon 25 is rotated and laterally moved from the standby station 4 shown by the chain line in FIG. 7 to the operating position shown by the solid line, and the ribbon 25 is transferred.

Next, the operation of this embodiment will be explained.

In this embodiment, when a print signal corresponding to a predetermined character is input based on a key operation or the like, the switching solenoid 36 is first energized and the selection member 32 selects the selection shown by the chain line in FIG. It is rotated to the operation switching position, and movement of the carriage 5 is closed. Further, as the selection member 32 rotates, the feed pawl member 46 is operated via the connecting pin 38 from the operating position shown by the solid line in FIG. 6.7 to the standby position U shown by the chain line.

In this state, the electric motor 14 is rotated by a predetermined amount in an appropriate direction based on the printing signal, the timing belt 12 is rotated, and the type carrying element 7 is selectively rotated via the transmission tooth width 29 and the rotation shaft 6. , the predetermined type 7a is on the platen 2.
is selected and placed at the print position corresponding to . Thereafter, the switching solenoid 36 is demagnetized and the selection member 32 is moved to the fourth position.
It is pivoted to the transfer operation switching position shown in solid lines in the figure, and the rotation of the type supporting element 7 is prevented. At this time, the selection member 32
By the action of the spring 35, the claw portion 32a is reliably rotated and moved below the claw width 31 in a vertical plane passing through the axis of rotation of the claw width 31. Once engaged, rotation of the type-carrying element 7 is immediately prevented. Further, as the selection member 32 rotates and follows the connecting bin 38, the feed claw member 46 moves to the sixth position due to the action of 648.
The ribbon 25 is moved from a standby position shown by a chain line to an operating position shown by a solid line in FIG.

In this state, the printing solenoid 21 is temporarily energized, and the hammer 17 is rotated counterclockwise in FIG. The ribbon 25 is pressed against the ribbon 25 to print on the printing paper on the platen 2.

After the printing operation is performed in this manner, when the electric motor 14 is rotated by a predetermined amount in one direction, the timing belt 12 is rotated and the carriage 5 is moved rightward by one character bit. Further, when the electric motor 14 is rotated in the other direction while the character supporting element 7 is in the rotation-blocking state, the carriage 5 is returned toward the original printing position on the left side.

Note that the present invention is not limited to the configuration of the first embodiment, and the configuration of each part can be arbitrarily changed and embodied without departing from the spirit of the first embodiment.

Effects of the Invention As detailed above, in the present invention, the selection switching of the type carrying element selection operation and the carriage transfer operation, as well as the ribbon transfer operation, are performed in conjunction with one driving source such as a solenoid. This has the excellent effect of simplifying the configuration.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a printing device showing an embodiment of the present invention;
Fig. 2 is a front view, Fig. 3 is an enlarged cross-sectional view of the carriage portion, Fig. 4 is an enlarged longitudinal sectional view of the carriage portion, Fig. 5 is an enlarged side view of the carriage, and Fig. 6 is a ribbon feeding device. FIG. 7 is a partially enlarged longitudinal cross-sectional view, and FIG. 7 is a similarly enlarged cross-sectional view. 1 is a machine frame, 2 is a platen, 5 is a carriage, 7 is a type short support element, 7a is a type, 12 is a timing belt, 14
is an electric motor, 17 is a hammer, 24 is a ribbon cassette, 2
5 is a ribbon, 271 is a feed roller, 28 is a take-up reel,
32 is a selection member, 36 is a solenoid, 38 is a connecting bottle,
39 is a rotating shaft, 45 is a claw width, and 46 is a feeding claw member as a ribbon feeding means. Patent applicant Brother Industries, Ltd. Representative Patent attorney On 1) Hironobu Figure 6

Claims (1)

[Claims] 1. A carriage (5) rotatably supporting a type carrying element (7) having a large number of type characters (7a) facing a platen (2) mounted on a machine frame (1). Said platen (2)
a transport movement for transporting along said type carrying element (7);
In a printing device configured such that a selection operation of rotationally indexing and selecting a desired type character (7a) is selectively performed in conjunction with one electric motor (14), a selection member (32) movably installed in the ribbon cassette (24) supported on the carriage (5) for switching between the transfer operation and the selection operation; A part of the selection member (3
2) A printing device comprising a ribbon feeding means (46) for transporting the ribbon (25) by a predetermined distance in conjunction with the movement of the printing device.