JPH0219239Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field This invention relates to a serial printer with multiple print heads.

Prior Art Conventionally, as shown in Japanese Unexamined Patent Publication No. 57-12666, a serial printer equipped with a plurality of print heads has been equipped with a guide shaft installed parallel to the platen at equal intervals in the width direction of the print paper. , a first carriage bar and a second carriage bar to which a plurality of dot matrix printing heads are attached are supported so as to be able to reciprocate at a required interval around the axis of the platen, and a motor drive pulley and a pulley one side of the timing belt stretched between the first carrier bar and
In addition, the other is fixed to the second carriage bar, respectively,
A dot line printer is known that prints while moving the first and second carriage bars in opposite directions at equal speeds using a timing belt that runs as the motor drives.

However, since the structure is such that the first and second carriage bars connected to a timing belt that runs as the motor is driven simultaneously move in opposite directions at the same speed, The types of printheads used must be the same. Therefore, the first and second
When the carriage bars of the printer were equipped with different types, for example, one with a dot print head and the other with a type wheel type print head, it was not possible to print using both print heads at the same time. In other words, one dot matrix type print head prints while continuously moving along the print line of the platen, while the other type wheel type print head prints at each print position. Since the print head is temporarily stopped each time printing is performed,
It was not possible to print drive both print heads at the same time.

The present invention was devised to solve the above-mentioned conventional drawbacks, and its purpose is to equip a printer with multiple print heads that move in different ways during printing, and to print simultaneously with these print heads. In addition to being able to drive the device, it also reduces the size of the device.
It is an object of the present invention to provide a serial printer equipped with a plurality of print heads that can be made lighter and lower in cost.

Example Examples will be described below with reference to the drawings.

1 and 2, a platen 2 is rotatably supported on a frame 1 of a serial printer. The platen 2 feeds the attached print paper 4 in a direction perpendicular to its axis as the paper feed step motor 3 to which it is connected is rotated. Further, a guide member 5 parallel to the axis of the platen 2 is fixed to the frame 1. First and second recesses 6 and 7 are formed on the front and rear surfaces of this guide member 5 in two stages, upper and lower, in the longitudinal direction. In the first and second recesses 6 and 7, first and second carriers 10 and 1 are inserted.
1 is supported through bearings so as to be able to reciprocate. Further, on the upper and lower surfaces of the guide member 5, a large number of pole teeth 8, 9, which constitute a part of the first and second planar drive members, respectively, are formed at predetermined pitches in a direction perpendicular to the longitudinal direction. These first and second
Electromagnetic devices 10a, 11a, which constitute a part of the first and second planar drive members, respectively, are attached to positions facing the pole teeth 8, 9 of the carriers 10, 11, and the electromagnet devices 10a, 11a and The pole teeth 8 and 9 constitute a planar linear step motor as a first and second print head moving mechanism. When these electromagnet devices 10a, 11a are selectively excited and driven, the first and second carriers 10, 11 are reciprocated along the guide member 5.

The first and second carriers 10 and 11 are arranged so that they do not interfere with each other during reciprocating movement. A first print head 20 is attached to the first carrier 10, and a second print head 21 is attached to the second carrier 11.
They are each mounted and fixed so as to be located at a print line separated by a predetermined number of lines from the 0 print position. Said first
The printing head 20 includes a type element 22 having a large number of type characters 22a on the outer periphery side, and a desired type 22a by rotating this type element 22 a predetermined number of steps.
It is composed of a type selection step motor 23 that rotates the type 22a to the printing position, and a printing hammer 24 that strikes the type 22a rotated to the printing position onto the printing paper 4 via an ink ribbon (not shown). It is in the form of a type wheel. The second print head 21 is wire dot-shaped and prints symbols and the like in a dot matrix by selectively magnetically driving a large number of attached print wires (not shown). 1 print head 2
The printing speed is faster than 0.

Next, the operation of the embodiment will be explained.

For example, when creating a diagram, when the printing line of the printing paper 4 corresponding to the table column is fed to the printing position of the first printing head 20 by the rotational drive of the paper feeding step motor 3, The carrier 10 is sequentially moved to each printing position along the printing line by the excitation drive of the electromagnet device 10a. Along with this movement, the first printing head 20 uses the printing hammer 24 to strike the type 22a, which has been rotated to the printing position by the drive of the type selection step motor 23, and prints a character corresponding to the type 22a on the printing paper 4. to print in font format.

On the other hand, when the printing line of the printing paper 4 corresponding to the vertical lines and horizontal lines of the table is fed to the printing position of the second printing head 21 as the paper feeding step motor 3 is rotated, The carrier 11 is moved along a second printing line separated by a predetermined number of lines from the first printing head 20 by exciting and driving an electromagnetic device 11a independently of the movement of the first carrier 10.
The print head 21 of the printer is moved. Along with this movement, the second print head 21 records vertical lines and horizontal lines on the print paper 4 in the form of dots by selectively magnetically driving the attached print wire.

In this embodiment, a type wheel type print head 20 and a dot matrix type print head 21 are movably supported on a single guide member 5, and pole teeth 8, 9 provided on the guide member 5 and Electromagnetic device 10 provided in each print head 20, 21
Since the first and second planar drive members constituted by a and 11a can be moved in a manner corresponding to the movement manner of each printing head, printed characters and dot matrix characters can be printed simultaneously. This increases printing efficiency. Furthermore, since the first and second planar driving members are attached to a single guide member, the device can be made smaller, lighter, and less expensive.

The above explanation has been made regarding the case where a chart is created by printing characters using the first print head 20 and vertical lines and horizontal lines of a table using the second print head 21. Heads 20, 21
Of course, it is also possible to drive printing selectively or simultaneously.

Effects of the Invention As explained above, the present invention includes a platen that supports printing paper, a single guide member suspended horizontally parallel to the longitudinal direction of the platen, and a movable member that moves in the axial direction with respect to the guide member. The high-speed printer is arranged such that each printing position faces the printing paper supported by the platen at an interval of the required number of printing lines, and so that they do not interfere with each other during reciprocating movement. A dot matrix type print head for printing, a type wheel type print head for low speed printing, and a large number of first and second pole teeth provided on the guide member and arranged at a required interval in the axial direction. and first and second electromagnetic devices respectively provided on both print heads so as to face the first and second pole teeth.
The planar drive member and the first planar drive member are intermittently driven to perform a printing operation while stopping the type wheel type print head at each printing position, and the second planar drive member is continuously driven. and a control means for executing a printing operation while moving the dot matrix type printing head by driving the dot matrix type printing head, and is equipped with a plurality of printing heads having different movement modes during printing, and driving these printing heads simultaneously for printing. In addition to reducing the size of the device,
It is possible to provide a serial printer with multiple print heads that is lightweight and low cost.

[Brief explanation of drawings]

FIG. 1 is a perspective view schematically showing a serial printer, and FIG. 2 is a schematic sectional view showing the arrangement of first and second print heads. In the figure, 4 is the printing paper, 10 is the first carrier, 1
0a is an electromagnetic device constituting the first print head moving mechanism, 11 is a second carrier, 11a is an electromagnet device constituting the second print head moving mechanism, 20
21 is a first print head, and 21 is a second print head.

Claims (1)

[Claims for Utility Model Registration] A platen that supports printing paper, a single guide member suspended horizontally in parallel to the longitudinal direction of the platen, and a single guide member supported movably in the axial direction of the guide member. and dots for high-speed printing, each printing position facing the printing paper supported by the platen at an interval of the required number of printing lines, and arranged so that they do not interfere with each other during reciprocating movement. a matrix type print head and a type wheel type print head for low speed printing; a large number of first and second pole teeth provided on the guide member and arranged at a required interval in the axial direction; first and second pole teeth provided on both print heads, respectively, so as to face the first and second pole teeth;
first and second planar drive members comprising an electromagnetic device; and the first planar drive member is intermittently driven to stop the type wheel type print head at each printing position while performing a printing operation. , said second
1. A serial printer equipped with a plurality of print heads, comprising: control means for executing a printing operation while causing the dot matrix type print head to travel by continuously driving a planar drive member of the dot matrix type print head.