JPS60229781A - Ribbon feeder for printer - Google Patents

Abstract

PURPOSE:To enable the feeding of a ribbon accurately by a specified amount by a method wherein a clutch means is connected in linkage with the printing action and a second rotating shaft is turned by a specified angle based on the subsequent shift of the carriage to shut it down. CONSTITUTION:After a printing operation, as a motor rotates by a specified amount, a carriage 5 is shifted by one character through a timing belt and with the shift thereof, a first rotating shaft 39 is transmitted to a second rotating shaft 42 through a clutch 50 and clutch cylinder bodies 48 and 49 as connected and turns a feed roller 27 and a takeoff reel 28 in a ribbon cassette 24 through gears 43-46 to shift a ribbon 25. Then, when a pawl wheel 52 turns by a specified angle, a pawl section 53a of an engaging body 53 engages one pawl piece of the pawl wheel 52 to loosen and shut down the clutch 50 with the rotation of the rotating shaft 39. Therefore, only when the printing operation is done, the ribbon 25 is shifted positively by the minimum necessary amount for the printing.

Description

Detailed Description of the Invention Technical Field This invention relates to a method for sequentially transporting a carriage rotatably supporting a type carrying element having a large number of type characters relative to a platen mounted on a machine frame ← main platen. At the same time, the type carrying element is rotatably indexed to select a desired type, and the selected type is pressed toward the platen through a ribbon placed closer to the platen than the type. The present invention relates to a printing machine configured to print on printing paper supported on a grating, and particularly to a ribbon feeding device thereof.

Purpose of the Invention An object of the present invention is to provide a ribbon feeding system in which ribbon feeding is not performed when the carriage is transported for spacing, etc. that does not involve a printing operation, and ribbon feeding is performed only when a printing operation is performed, along with subsequent carriage transportation. , Moreover, the ribbon feed is linked to the movement of the carriage so that the minimum amount of paper necessary for printing is possible).
It is an object of the present invention to provide a ribbon feeding device in a printing machine that can reliably perform M-quantity at a time and can effectively use the ribbon.

Structure of the Invention In order to achieve the above-mentioned objects, the present invention provides a ribbon force center supported on a carriage and housing the ribbon, and a ribbon force center rotatably supported on the carriage and parallel to the platen. It has a rotating wheel that engages with a guide provided on the machine frame, and a first rotating shaft that is rotated by the rotating wheel as the carriage is transferred, and a carriage that rotates along the axis of the first rotating shaft. a second rotating shaft rotatably supported on the trap for transporting the ribbon by rotation thereof;
A clutch means disposed between the first and second rotating shafts for connecting and disconnecting them, and a printing device for normally disconnecting the clutch means and performing the printing when performing the above-mentioned printing. and a clutch control means for connecting the first clutch means in conjunction with the operation and disengaging the clutch means in a state in which the second rotating shaft is rotated by a predetermined angle based on subsequent carriage transfer, and the printing operation is performed by: The ribbon is configured to be transferred by a predetermined amount as the carriage is transferred only when this is performed.

EXAMPLE Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

In this embodiment, a platen 2 is rotatably mounted on the machine frame 1, and a printing paper (not shown) can be supported around the outer periphery of the platen 2.

A guide rod 3 and a guide plate 4 as guide members are provided on the machine frame 1 so as to extend parallel to the platen 2, and a single carriage 5 slides along the guide rod 3 and the guide plate 4. Possibly supported. As shown in FIG. 1.4, a rotating shaft 6 is rotatably supported on the carriage 5 on a substantially horizontal axis extending in the front-rear direction, and a platen 2 is attached to the tip of the rotating shaft 6.
A type carrying element 1 having a large number of type characters 1a is mounted opposite to it.

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 boot 99 is rotatably supported on the outer side of the fixed mounting plate 8. A movable mounting plate 10 is installed on the left side of the machine frame 1.
is rotatably supported with a retaining protrusion IDa located approximately at the center in the vertical direction engaged with a small hole in the machine frame 1, and a glue 11 is rotatably supported on the outer side of the carrier ring 5. An endless timing belt 12 is hung between the pulleys 9 and 11 so as to extend parallel to the platen 2 across the pulleys 9 and 11. A spring 1 is installed between the movable mounting plate 10 and the machine frame 1.
3 is hung, and the movable mounting plate 10 is rotated counterclockwise in FIG. 2 to apply tension to the timing belt. As shown in FIG. A single electric motor 14 made of a step motor is attached to the fixed mounting plate 8, and the timing belt 12 is rotated through a driving gear 15 on the motor shaft and a driven gear 16 on the pulley 9. Then, by the rotation of the timing belt 12 based on the electric motor 14, the carriage 5 is transferred to the platen 2, and the type carrying element 7 is rotationally indexed to place the type γa at the position V on the platen 2. A selection operation for selecting a corresponding predetermined printing position can be selectively performed.

As shown in FIG. 1.4.5, a hammer 11 is rotatably supported on the carriage 5 by a support shaft 1B in correspondence with the type carrying element 1, and a drive pin 19 is attached to one end side of the hammer 11. is installed protrudingly. There is a spring 20 between the hammer 11 and the carriage 5! The hammer 11 is always biased and held in the vertical original position shown by the solid line in FIG. 4-5 by its spring force. As shown in Fig. 2.5, a printing solenoid 21 is attached to the carriage 51, and +:
With the 0 excitation, the armature 22 is rotated clockwise in Figure 5 against the action of the spring 230, and the Eva 77-11 is rotated counterclockwise in the figure via the drive bottle 19 to print. One type character 7 on the type-carrying element T selectively arranged in position H
a is pushed toward the platen 2.

In this embodiment, the hammer 11 is rotated from the original position shown by the solid line in FIG. 5 to the A position shown by the chain line by the rotation of the armature 22 based on the excitation ai of the solenoid 21, and then rotated by inertia. It is designed to be rotated at the B position shown by the chain line.

As shown in FIG.
is stored in a wound state on the supply reel 26.

A part of this ribbon 25 is exposed to the outside of the ribbon cassette 24 and is placed between the platen 2 and the type 7a. The trap is set so that printing is performed on the printing paper on the second side. Further, this ribbon 25 is transported by a predetermined amount by a feed roller 2γ provided in the ribbon cassette 24 for each printing operation, and is wound onto a winding wheel 28.

On the other hand, as shown in FIGS. 2 to 4, the carriage 5.1:
A transmission gear 29 is fixed to the rotating shaft 6 of the
belt 120J: located between the downward belt pieces so as to be able to engage with the lower belt pieces. A pair of guide rows 23 are mounted on the carriage 5 near both sides of the transmission gear 29.
0 is rotatably supported, and as shown in FIG. 3, the lower belt piece of the timing belt 12 is pressed against the outer periphery of the transmission gear 2 so that both gears 12.2 and 2 are engaged with each other over a wide range. Therefore, due to the rotation of the timing belt 12 based on the electric motor 14, the
The rotating shaft 6 is rotationally driven.

As shown in FIGS. 2 to 4, a mold wheel 31 is fixed to the end face of the transmission gear 29, and the rotation of the rotating shaft 6 can be prevented through this train 31t.

#1, which passes along the axis of the rotating shaft 6 below the model wheel 31, is rotatable in a vertical plane, and on the carriage 5, a weight-bearing member 32 as a means for preventing rotational movement is supported by a substantially horizontal support shaft 33. It is rotatably supported, and as shown in FIG.
za is formed, and the lower tip IC is attached to the rubber engaging body 3 provided in the movement range of the carriage 5 on the machine frame 1.
A retaining portion 32b that can be engaged with and detached from 4 is formed, and an operating piece 32C extends from the right side.

A spring 35 is provided between the IF member 32 and the carriage 5.
is hung, and applies a rotational force to the blocking portion 32 in the clockwise direction in FIG. 4. By the action of this spring 35, the KFi blocking member 32 engages one D claw piece of the first ratchet wheel 31 from below at its claw portion 32a, as shown by the solid line in FIG. is biased and held in a rotation-preventing position that prevents rotation. The upper trap of the carriage 5 is equipped with a switching solenoid 36, and its armature 3-7
An actuating piece 320 of the blocking member 32 is connected to the connecting pin 38 . As the solenoid 36 is energized, the blocking member 32 is rotated counterclockwise from the rotation blocking position shown by the solid line in FIG.
A movement blocking position fj/LK where the engaging portion 32b engages with the engaging body 34 on the machine frame 1 to prevent movement of the carriage 5.
There are 1 people who are starting to be placed.

Further, in this embodiment, when the blocking member 32 is completely disposed at the rotation blocking position, the typing bell 112 is rotated with the rotation of the electric knife 14, so that the carriage 5 is moved between the guide rod 3 and the guide plate. It is designed to move along the lines 4 and 4. In addition, when the blocking member 32 is placed at the 8-b load-bearing position, the timer/couple belt 12 is (b) rolled as the electric motor 14 rotates, and the type selection rotation of the type carrying element 1 is caused. The structure of the secondary 1'C and ribbon feeding device, which is arranged so that
On the carriage 5, a mud-rotating crab is rotatably supported around a nearly vertical It41I rack, and a pinion 40 as a rotating wheel is fixed to the lower end thereof. Machine frame 1Kl-J so as to mesh with the binion 40.
A rank 41 serving as a guide member 1 is provided in parallel with the frame 2, and as the loaf jarring 5 is transferred, the first rotating shaft 39 is rotationally driven by the distance between the rack 41 and the pinion 40. There is.

A Fi second rotating shaft 42 is rotatably supported by the key 1' rigidity 51 so as to extend along the axis m+ of the first rotating shaft 39, and a driving gear 43 is attached to the upper end thereof. As the second rotating shaft 42 rotates, the feed roller 2T in the ribbon cassette 24 is rotated via the transmission gear 44 provided on the carriage 5.
The take-up reel 2B in the ribbon cassette 24 is rotated via the transmission gears 45, 467 on the carriage 5.
5 transfers are now taking place. A clutch 4T is provided between the transmission gear 46 and the take-up reel 2B, and the winding diameter of the ribbon 250 on the take-up reel 28 is increased so that the amount of ribbon wound by the take-up reel 28 is increased. When the ribbon feed amount becomes larger than the amount of ribbon fed by the roller 27, slippage occurs in this clutch 4T portion.

At opposite ends of the two rotating shafts 39 and 42, a VcV'i clutch cylinder 48 is fitted and supported on the first rotating shaft 39 so as to be relatively rotatable, and the clutch is mounted on the second rotating shaft 42. A latch cylinder 49 is fitted and fixed so as to be rotatable over a certain range with respect to the cylinder 4B, and both rotating shafts 39, 42 are connected within these clutch cylinders 48,49.
Spring clutch 50 as clutch means for disconnecting
is provided. And this spring clutch 50,
After being attached to one clutch cylinder 48 at one end and wound around the first rotating shaft 39 at the other end,
It is attached to the other clutch cylindrical body 49 and is normally wound around the outer periphery of the first rotating shaft 39 to form a trap.

Carriage 5J on the side of the spring clutch 50:
is provided with a clutch control means 51, and this control means 5
1, the spring clutch 50 is always disconnected, and when printing, the spring clutch 50 is connected in conjunction with the printing operation to perform the printing, and the spring clutch 50 is connected based on the subsequent movement of the carriage 5. The spring clutch 50 is disconnected while the second rotating shaft 42 is rotated by a predetermined angle.

That is, a train 52 is integrally formed on the cylindrical body 48 on the first rotating shaft 39, and a large number of claw pieces are provided on the outer periphery of the train 52. Under the side force of the mold wheel 52, the engaging body 53 is rotatably supported on the carriage 5 by the support @54, and the 6th end of the carriage 5 has a claw portion that can be engaged with and detached from one of the claw pieces of the mold wheel 52. 53 & is formed, and a retaining piece 53b that is engaged with the connecting pin 38 of the actuating piece 32C1 of the blocking member 32 is formed at the other end.

Also, the retainer 53 is always kept in the sixth position by the action of the pusher 55.
The spring clutch 5 is biased to rotate counterclockwise in the figure, and its claw portion 53a is engaged with the claw piece on the electric train 52.
0 is maintained in a state where it is blocked. During printing, when the blocking part 32 is rotated from the rotation blocking position shown by the solid line in FIG. 4 to the movement blocking position shown by the chain line in FIG. 4 based on the excitation of the switching solenoid 36, The engaging body 53 is rotated from the solid line position to the chain line position in FIG.
It is a trap so that the spring clutch 50 is connected when released.

Next, the operation of Jin's 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 member 32 moves to bright IF, as shown by the chain line in FIG. It is rotated to the blocking position and movement of the carriage 5 is blocked. Further, as the blocking member 32 rotates, the engaging body 53 is rotated clockwise via the connecting hinge 3B from the solid line position in Figure 6, and the mold wheel 5 is rotated as shown by the chain chain line in the figure.
It is separated from the second claw piece. As a result, the spring clutch 50, which had been loosened and disconnected due to the engagement between the retainer 53 and one pawl of the model wheel 520, is tightened on the first rotating shaft 39 and becomes connected. Due to the tightening action, the pattern wheel 52 is slightly rotated counterclockwise from the state shown in FIG. 7 to the state shown in FIG. 8.

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 γ is selectively rotated via the transmission gear 29 and the rotating shaft 6 to achieve a predetermined rotation. The printed characters 1a are selectively placed at a printing position corresponding to the platen 2. Thereafter, the switching solenoid 36 is demagnetized and the first blocking member 32 is moved to the rotation blocking position MK rotational joint shown by the solid line in FIG. 4, thereby blocking the ten rotations of the type carrying element. At this time, the blocking member 32 is moved backward in a plane perpendicular to the rotational axis of the mold wheel 31 below the mold wheel 31 due to the action of the spring 35, so that the claw portion 328 is moved downward from the mold wheel 31. 31, the rotation of the type-carrying element 70 is immediately prevented.

Further, as the blocking member 32 rotates, the edge engaging body 53 follows the connecting pin 38 and is rotated back counterclockwise from the chain line position IIt in FIG. 6 due to the action of the spring 55, as shown in FIG. As shown, the seventh claw portion 53a is held stationary in a state where it is in contact with the Ij1 portion of one claw piece of the model wheel 52.

In this state, the printing solenoid 21 is temporarily activated, and the hammer 1 is activated via the armature 22.
7 rotates in the counterclockwise direction in FIG.

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 5-carriage 5 is moved to the right by one character pinch. As the carriage 5 is transferred, the first rotary shaft 39 is rotated nine times in one direction by the pinion 40 that meshes with the rank 41, and the rotation is transmitted to the second rotary shaft 39 through the connected spring clutch 50 and clutch cylinder body 48,49. The signal is transmitted to the rotating shaft 42. Thereby, the drive gear 43 and the transmission iI gear 4
4. Feed roller 2 in ribbon cassette 24 via 45
T is rotated clockwise in FIG. 1, and at the same time, the take-up reel 2B is rotated counterclockwise in the figure via the drive gear 43 and the transmission gear 46, and the ribbon 25 is transferred.

When the mold wheel 52 is rotated by a predetermined angle α in the counterclockwise direction from the state shown in FIG. Model car 5
The spring clutch 50 is engaged with the first claw piece, and as the first rotating shaft rotates for three days thereafter, the spring clutch 50 is loosened and becomes in a disconnected state. Therefore, only when the revo y25ri printing operation is performed, the minimum ejection required for printing is actually transferred by 6+f in conjunction with the subsequent transfer of the gear ridge 5. l'i-shaped carrying element 70 rotation inhibiting load-bearing state,
1i (when the motive 14 is rotated in the other direction, the carriage 5 is returned to the left toward the original printing position. During this return movement of the carriage 5, the jJ - The rotating shaft 39 is rotated in the other direction, but since the rotation in the other direction acts on the end of the spring clutch 50 in a direction to loosen the spring clutch 50, the second rotation ++II42 Ktj is not transmitted.
The ribbon 25 is not transferred.

Another Embodiment Next, another embodiment of the present invention will be described with reference to FIG. 9. In this embodiment, the present invention is embodied in a printing machine in which printing is performed when the carriage 5 is moved in the left-right direction. be.

That is, in this embodiment, a drive shaft 60 having a pair of gears 65 and 68 is rotatably supported on the carriage 5 on the side of the first rotation shaft 39, and a rotary pulley 61 as a rotary wheel is provided at the lower end of the drive shaft 60. is fixed. A wire 62 is stretched parallel to the platen 2 as a Ktj guide on the Km frame 1 so that the rotating pulley 81 K winds and engages with the rotating pulley 81. As the carriage 5 is transferred, the drive shaft 60 rotates through the rotating pulley 61. It is now possible to do so. Drive shaft 60
First and second one-way rotational clutches 63 and 64 are provided above to be located between the shaft 60 and the 1IIIiii3 gears 65 and 68, respectively, and when the carriage 5 is moved in one direction, the drive shaft is When 60 is rotated in one direction,
Only the first one-way rotating launch 63 is connected to the float 6
5. a connecting gear 66 and a gear 67 on the first rotating shaft 39;
When the rotation is transmitted to the first rotation shaft 39 through the drive shaft 60 and the drive shaft 60 is rotated in the other direction as the carriage 5 is transferred in the other direction, only the second one-way rotation launch 63 is connected. gear 6B, another gear 69 on the first rotating shaft 39
Rotation is transmitted to the first rotating shaft 39 via.

Therefore, in this embodiment or when the carriage 5 is moved to the right side, the carriage 5 after the printing operation
1, the ribbon 25 is fed by a predetermined minimum amount of ht required for printing.

Note that the present invention is not limited to the configuration of the valley embodiment described above, but, for example, the first rotating shaft 39 may be configured to be rotated as the carriage 5 is transferred, which is different from each of the embodiments described above. Unlike the above embodiments, the engaging body 53 is rotated in conjunction with the printing hammer 1γ, and the pattern wheel 52
It is also possible to intentionally change the configuration of each part within the φ0 range without departing from the spirit of the present invention, such as by configuring it so that the engagement with the claw piece is temporarily disengaged.

Effects of the Invention As described above, in this invention, the ribbon is not fed when the carriage is transferred such as spacing that does not involve a printing operation, and only when a printing operation is performed, the ribbon is not fed during the subsequent carriage transfer. Ribbon feeding is performed, and the ribbon feeding is performed in conjunction with the movement of the carriage to ensure that the ribbon is fed by a predetermined amount within the narrow limit required for printing, which has the excellent effect of making it possible to use the ribbon effectively. .

[Brief explanation of the drawing]

#l, Figure 1 is a plan view of a printing machine showing an embodiment of this invention, Figure 2 is a front view, Figure 8 is an enlarged cross-sectional view of the carriage part, and Figure 4 is an enlarged longitudinal cross-section of the carriage part. 5 is an enlarged side view of the carriage, FIG. 6 is an enlarged vertical cross-sectional view of the ribbon feeding device [11], FIG. 7 is an enlarged cross-sectional view of the same, and FIG. FIG. 9 is a partial perspective view of a ribbon feeding device showing another embodiment of the present invention. 1 is a 100 million frame, 2 is a platen, 5 is a carriage, a single digit type carrying element, 7aij type, 12 is a timing belt, 14
is an electric motor, 17 is a hammer, 213 is a ribbon cassette, 2
51 is a ribbon, 27 is a feed roller, 2B is a take-up reel,
32ij blocking member, 36V'i solenoid, 3B is a connecting bin, 39ViJ- rotation Qf140H binion as a guide wheel, 41 is a rank as a guide body, 42 is a second rotating shaft, 5 (1 is a spring clutch as a clutch means) , 5
1 is a flange control means, 52 is a train, 50'i engagement body,
61 is a rotating goo IJ as a rotating wheel, 62 is a wire as a guide body. 11 persons who have issued patents Brother Industries, Ltd. Agent Hironobu Onda Figure 6

Claims (1)

[Claims] 1 (a platen (2) mounted on a d-frame (1); a carriage (5) rotatably supporting a type carrying element (γ) having a large number of type characters (1a) facing each other; Said platen (2)
The type carrying element (γ
) to select the desired type (71), press the selected type (T&) toward the platen (2), and press the selected type (T&) toward the platen (2) than the type (7a). a printing machine configured to print on a printing paper supported on a platen (2) via a ribbon (25) arranged on the carriage (5);
a ribbon cassette (24) that stores the ribbon cassette (24);
5) having a rotary ring (40, 61) rotatably supported on the machine frame and engaging with a guide body (41, 62) provided on the machine frame (1) in parallel with the platen (2); Said carriage (
5), which is rotated by the rotating wheels (40, 61), and the carriage (3) along the axis of the first rotating shaft (39).
5) a second rotating shaft (42) rotatably supported on the top and for transporting the ribbon (25) by rotation; and a second rotating shaft (39, 42) arranged between clutch means (50) for connecting and disconnecting the
The clutch means (50) is always shut off, and when printing is performed, the clutch means (50) is connected in conjunction with the printing operation to perform the printing, and the subsequent carriage (50) is connected.
) is provided with a clutch control means (51) for interrupting the clutch means (50) while the second rotating shaft (42) is rotated by a predetermined angle based on the transfer of the second rotary shaft (42), when a printing operation is performed. A ribbon feeding device for a printing machine, characterized in that it is configured to transfer one ribbon (25) by a predetermined amount as the carriage (5) is transferred. 2. The clutch means is connected to the first and second rotating shafts (
A spring clutch (50) with one end attached to either one of 39, 42) and wound around the other end or the other rotating shaft.
and the clutch control means (51) is configured to control the spring clutch (
50) A number of claw pieces attached to the other end engage with a mold wheel (52) provided with a lodging trap and one of the claw pieces of the mold wheel (52) to interrupt the spring clutch (50). With,
It is movably provided on the carriage (5) so that the engagement with the pawl of the mold wheel (52) is once released and the spring clutch (50) is connected with the printing operation for performing Moeki printing. A ribbon feeding device in a printing machine according to claim 1, characterized in that the ribbon feeding device includes a holding body (53) that is held in place. 8171I engaging body (53) F'i, in conjunction with the hammer (17) K for pressing and printing the selected type (7a) on the platen (2) side, presses the die wheel (52). 3. The ribbon feeding device for a printing machine according to claim 2, wherein the ribbon feeding device is configured such that the attachment with the claw piece is once released.