JPS60229773A - Printer - Google Patents

Abstract

PURPOSE:To enable a reduced selective action time of a type support element by performing the shifting action of the carriage and the selective action of the type support element independently with one motor. CONSTITUTION:When a printing signal is inputted by a key operation or the like, first a switching solenoid 36 is excited and a blocking member 32 turns to block the movement of the carriage 5 so that with the rotation of a motor 14 by a specified value, the type support element 7 is rotated selectively through a timing belt 12, a gear 29 and a rotating shaft 6 to make a specified type 7a face a platen 2. Then, the solenoid 36 is demagnetized and the blocking member 32 turns to the rotation blocking position so that a pawl section 32a positively engages one pawl piece of a pawl wheel 31 with the action of a spring 35 to block the rotation of the element 7. Under such a condition, a printing is done and upon the end thereof, the carriage 5 is shifted by one character through the timing belt 12 with the rotation of the motor 14 by a specified value in one direction.

Description

Detailed Description of the Invention Technical Field The present invention relates to a printing device, and more particularly to a transfer operation for transporting a carriage rotatably supporting a type-carrying element along a platen, and for rotationally indexing the type-carrying element to perform a desired printing operation. The present invention relates to a printing device in which a selection operation for selecting printed characters on a printing position corresponding to a platen is selectively performed by - electric motors.

Prior Art As a conventional printing device of this type, for example,
As shown in Japanese Patent No. 47526, there is a device in which a single electric motor provided on the carriage or the machine frame is used to carry out the movement of the carriage and the selection of the type carrying elements. However, in this conventional device, the type carrying element is always operatively connected to the electric motor, and when the carriage is moved as the electric motor is driven,
Since the type-carrying elements are designed to be rotated in conjunction with each other, when selecting a type-carrying element, the type-carrying element must be returned to its reference position and then being operated for selection. The control structure is complicated, selection operations take time, and the printing speed cannot be increased.

Purpose of the Invention The present invention solves the above-mentioned defects in the conventional device, and makes it possible to independently and reliably carry out the carriage transport operation and the selection operation of the type carrying element by one electric motor, and to improve the type carrying element. It is an object of the present invention to provide a printing device that can shorten element selection operation time and increase printing speed.

Structure of the Invention In order to achieve the above-mentioned object, the present invention provides a platen that is attached to a machine frame and supports printing paper, and a guide body that is provided on the frame of the paper colander so as to extend parallel to the two platens. a carriage slidably supported along the carriage; a flea rotatably supported on the carriage by a rotating shaft;
a type carrying element disposed relative to the platen; a hammer for pushing the type carrying element towards the platen; a belt attached to the machine frame for interlocking the electric motor to drive the rotating shaft; a rotation blocking position for engaging with the rotating shaft to prevent its rotation; and a belt for engaging with a part of the machine frame and for driving the rotating shaft. a rotational movement blocking means provided on the carriage so as to be able to move between a movement blocking position and a movement blocking position where the electric motor rotates. The carriage is moved along the guide body without rotating the type carrying element, and by moving the rotational movement blocking means to the movement blocking position, the type selection rotation of the type carrying element is performed as the electric motor rotates. It is composed of

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

Now, in this embodiment, a platen 2 is rotatably attached to the machine frame 1, and a printing paper (not shown) is attached to the outer periphery of the platen 2.
It is designed to be able to support the surrounding area.

A guide rod 3 and a guide plate 4 as guide bodies are provided on the machine frame 1 so as to extend parallel to the platen 2, and the descendants of the guide rod 3 and guide plate 4 move along them to the carriage 5.
is slidably supported. As shown in FIG. 1.4, a rotary shaft 6 is rotatably supported on the carriage 5 on a substantially horizontal axis extending in the front-rear direction, and a large number of type characters 7a are mounted at the tip of the shaft 6 facing the platen 2. A type-carrying element 7 is mounted.

As shown in the first and second cases, 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 of the fixed mounting plate 8. A movable mounting plate 10 is movably supported on the left side of the machine frame 1 with an engagement protrusion 10a located approximately at the center in the vertical direction engaged with a small hole in the machine frame 1. A pulley 11 is rotatably supported.

An endless timing belt 12 is hung between the belts 9 and 11 that intersect the carriage 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 rotates the movable mounting plate 1o counterclockwise in FIG. 2 to apply tension to the timing belt. ing.

As shown in FIGS. 1 and 2, one electric motor 14 consisting of a step motor is attached to the fixed mounting plate 8, and a driving gear 15 on the motor shaft and a driven gear 1 on the pulley 9 are attached to the fixed mounting plate 8.
6, the timing belt 12 is rotated. The rotation of the timing belt 12 based on the electric motor 14 performs a transport operation to transport the carriage 5 along the platen 2 and the type carrying element 7.
A selection operation of rotationally indexing and selecting a predetermined print position of a predetermined type 7a corresponding to the platen 2 can be selectively performed.

As shown in FIG. 1.4.5, on the carriage 5, corresponding to the type carrying element 7, there is a support shaft 18G.
It is rotatably supported by this, and a drive pin 19 is provided protruding from its lower end side. A spring 20 is hung between the hammer 17 and the carriage 5, and the force of the spring always keeps the hammer 17 in its original, almost vertical position shown by the solid line in Fig. 4-5. . As shown in Figures 2 and 5, a printing solenoid 21 is mounted on the carriage 5, and with its excitation, the armature 22 is moved twice in the clockwise direction in Figure 5 against the action of a spring 23. The hammer 17 is rotated counterclockwise in the figure via the drive pin 19 to strike the number 1 on the type carrying element 7 selected at the printing position.
The printing press 7a is pressed against the platen 24.

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 shown by the solid line in FIG. ◆It is rotated to position B as shown.

As shown in FIG. 1, a ribbon cassette 24 is supported on the carriage 5, and a ribbon 25 is stored inside the cassette 24 wound on a supply reel 26G.

A part of this ribbon 25 is exposed outside the ribbon cassette 24 and placed between the platen 2 and the type 7a, and when the printer 17G presses the type 7a, this ribbon 25 is exposed. Printing is performed on the printing paper on the platen 2 through the printing paper. Also, this ribbon 25
is transported by a predetermined amount for each printing operation by a feed roller 27 provided in the rib/cassette 24, and is wound twice on 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 positioned between the upper and lower belt pieces of the timing belt 12 to engage the lower belt piece. It is now possible to match. A pair of guide rollers 3 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 29, so that both parts 12 and 29 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 rotating shaft 6 is rotationally driven via the transmission gear 29.

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

A blocking member 32 serving as rotational movement blocking means is mounted on the carriage 5 on a substantially horizontal support shaft 3 so that the windmill 31 can rotate in a substantially vertical plane passing through the axis of the rotating shaft 6.
As shown in FIGS. 2 and 4, there is a claw part 3 at the top of the tip of the blade that can be engaged with and detached from the claw piece of the wind turbine 31.
2a is formed, and the lower tip of the flea is attached to a rubber engaging body 3 provided in the movement range of the carriage 5 on the machine frame 1.
An engaging portion 32b that can be engaged with and detached from 4 is formed, and an operating piece 32c extends from the right side.

An amber spring 35 is inserted between the blocking member 32 and the carriage 5.
is hung thereon, and applies a rotational force to the blocking member 32 in the clockwise direction in FIG. Due to the action of the spring 35, the blocking member 32 is always rotated as shown by the solid line in FIG.
The claw portion 32aG engages with one claw piece of the wind turbine 31 from below, and is biased and held in a rotation blocking position where rotation of the rotating shaft 6 is blocked. A solenoid 36 for switching is mounted on the carriage 5, and an operating piece 32c of the blocking member 32 is connected to the armature 37 by a connecting pin 3B. As the solenoid 36 is energized, the blocking member 32 is moved counterclockwise twice from the rotation blocking position shown by the solid line in FIG. Engagement body 34 on machine frame 1
◆When engaged, the carriage 5 is placed in a movement blocking position where movement of the carriage 5 is blocked.

Further, in this embodiment, when the timing belt 12 is rotated with the rotation of the electric motor 14 while the blocking member 32 is in the rotation blocking position, the carriage 5 is moved between the guide rod 3 and the guide plate 4. It is designed to be moved along. Further, with the blocking member 32 disposed at the movement blocking position, the timing belt 12 is rotated along with the rotating pot of the electric motor 14, so that the type selection rotation of the type supporting element 7 is performed. .

Next, the operation of this embodiment will be explained.

In this embodiment, when a print signal corresponding to a predetermined character is inputted through a key operation or the like, the switching solenoid 36 is energized and the blocking member 32 blocks the movement as shown by the chain line in FIG. The position is moved twice, and movement of the carriage 5 is prevented. 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 gear 29 and the rotation shaft 6 to achieve a predetermined rotation. The printed characters 7a are selectively arranged at a printing position corresponding to the platen 2.

Next, the switching solenoid 36 is demagnetized and the blocking member 32 is pivoted to the rotation blocking position shown in solid line in FIG. 4, thereby blocking the rotation of the type carrying element 7. At this time, the blocking member 32 is rotated back below the mold wheel 31 in a perpendicular plane passing through the rotation axis of the mold wheel 31 under the action of the spring 35, so that the claw portion 32a of the blocking member 32 is attached to one of the mold wheels 31. Due to the positive engagement of the pawls, rotation of the type-carrying element 7 is immediately prevented. In this state, the printing solenoid 21
is temporarily energized, and the hammer 17 is moved counterclockwise (twice) in FIG. Printing is performed on the printing paper on the platen 2.

After the printing operation is performed in this manner, the electric motor 14 is rotated in one direction by a predetermined amount, and the timing belt 12 is rotated.
The carriage 5 is moved to the right by one character pitch. or,
In the rotation-blocking state of the type-carrying element 7, the electric motor 1
4 is rotated in the other direction, the carriage 5 is moved back toward the original printing position on the left.

It should be noted that the present invention is not limited to the configuration of the above-mentioned embodiments, and the configuration of each part can be arbitrarily changed and embodied without departing from the spirit of the invention.

Effects of the Invention As described in detail above, the present invention is capable of independently and reliably carrying out the carriage transport operation and the selection operation of the type carrying element by one electric motor. This has the excellent effect of shortening time and increasing printing speed.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a printing device showing an embodiment of the present invention;
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, and FIG. 5 is an enlarged side view of the carriage. 1 is a machine frame, 2 is a platen, 3 is a guide rod as a guide body,
4 is also a guide plate as a guide body, 5 is a carriage, 6
7 is a rotating shaft, 7 is a type carrying element, 7a is a type, 12 is a timing belt, 14 is an electric motor, 17 is a hammer, 25 is a ribbon, 31 is a mold wheel, 32 is a blocking member as a rotational movement blocking means, and 34 is an engaging member. Combined, 36 is a solenoid. , Patent applicant Brother Industries, Ltd. Patent attorney Hironobu Onda

Claims (1)

[Claims] 1. A platen (2) attached to the machine frame (1) and supporting printing paper, and a machine frame (2) extending parallel to the platen (2).
A carriage (5) supported slidably along the guide body (3, 4: H) provided on the guide body (1);
5) a type carrying element (7) rotatably supported by a rotating shaft (6) on the platen (2) and arranged relative to said platen (2);
), the hammer (17) is pushed toward the! : is mounted on the machine frame (1) so as to engage with the rotating shaft (6) and extend parallel G with the guide bodies (3, 4), and the electric motor (1)
4) to drive the rotating shaft (6)) (
12), a rotation blocking position that engages with the rotating shaft (6) to prevent its rotation, and a movement blocking position that engages with a part of the machine frame (1) to prevent the carriage (5) from moving. and a rotational movement blocking means (32) provided on the carriage (5) so that the motor (14) can be moved to the rotation blocking position. With the rotation of the type carrying element (
1) is not rotated and the carriage (5) moves toward the guide body (
3, 4) G along the rotational movement blocking means (32
) to a movement blocking position, the printing device is configured so that the character selection rotation of the character carrying element (7) is performed in conjunction with the rotation of the electric motor (14).