JPS627562A - Shutte type line printer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] The shuttle type line printer device of the present invention is provided with two types of motors, namely, a moving coil type linear motor and a rotary motor, as a driving source for swinging the hammer bank. A moving coil type linear motor is used for driving the printing area, and a rotary motor is used for driving the printing area.

This simplifies drive control of the hammer bank and further reduces power consumption.

[Industrial application field]

The present invention relates to an improvement of a shuttle type line printer device,
In particular, it relates to the rationalization of hammerbank drive methods.

[Conventional technology]

Figure 4 shows a conventional shuttle type line printer device.
′ [ is a perspective view showing the structure of .

As shown in the figure, the shuttle type printer device includes a hammer bank 2 equipped with a plurality of print heads 1, and a movable coil type printer that is a driving source for swinging the hammer bank 2 in the direction of arrow A-^゛. It is equipped with a linear motor 5.
The hammer bank 2 is driven by the moving coil linear motor 5 and slides on the guide mechanism 3 in the direction of arrow A-A'.
The zero position sensor 7 is a sensor for detecting the position of the hammer bank 2, and the print head 1 prints on the print paper 4 on the platen 9.

However, since the moving coil type linear motor 5 generates thrust by energizing the moving coil 5a existing within the magnetic field, the moving coil 5a is present within the magnetic field over the entire swing stroke of the hammer bank 2. Must-have.

As a means to solve this problem, methods such as designing a single moving coil linear motor 5 to be longer in accordance with the swing stroke of the hammer bank 2, and using multiple moving coil linear motors are also being considered. .

However, in the former case, the gap magnetic flux density of the linear motor 5 becomes smaller due to the length of the moving coil 5a, which causes a reduction in thrust force.

In addition, the latter uses multiple moving coil linear motors to control the constant speed section of the hammer bank, that is, the printing area, so
It is necessary to control the energization timing so that the sum of the thrusts generated by the motor is constant at any position, which complicates the device configuration.

[Problem that the invention seeks to solve]

As described above, conventional shuttle type line printers are effective for printers in which the weight of movable parts such as hammer banks are small and the printing speed is relatively slow, but the weight of movable parts is large (
It is not suitable for printers with high printing speeds.

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Shuttle-type line printer device capable of high-speed printing
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[Means for solving problems]

The above problem is that the hammer bank uses a moving coil type linear motor as the thrust generation source for the direction change section, and drives a rotary motor equipped with a deformable cam as the thrust generation source for the continuous section (printing area) except for the direction change. This problem is solved by the shuttle type line printer device of the present invention.

[Effect]

The shuttle type line printer device of the present invention separates the drive motors for the continuous section (printing area) and the direction change section, and the required thrust is as small as about one-fifth of the direction change, but the printing area with a long stroke is It is driven by a small rotary motor, and the direction change area, which requires a large thrust but requires only a small stroke, is driven by a moving coil linear motor.

〔Example〕

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

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a diagram showing an ideal speed curve of a hammer bank.

As shown in FIG. 1, in the shuttle type line printer device of the present invention, the direction of the hammer six link 2 is changed by a moving coil type linear motor 5, and the direction of the hammer bank 2 is changed by a newly attached rotary motor IO and a deformable cam 11. It has a structure in which the continuous portion (print area) is driven.

For this purpose, the hammer bank 2 is provided with a cam follower 12 whose printing area is driven by the rotation of the deformable cam 11.

It is considered optimal for the swinging curve of the hammer bank 2 to be trapezoidal, which is a combination of a direction change part and a printing area, as shown in the speed curve shown in FIG. 2, for increasing the printing speed.

The thrust required to change the direction of the hammer bank 2 shown in FIG. 2 is extremely large compared to the thrust required for the printing area. Therefore, a moving coil type linear motor 5 is used in the direction changing part that requires a large thrust, and an isometric part (
In the print area), a rotary motor 10 is used as a drive source.

Since the moving coil type linear motor 5 generates an electromagnetic force proportional to the current, it can easily obtain a large thrust, and since the amount of movement when changing direction can be kept below 311II11, the gap cross-sectional area of the magnetic circuit can be small. It becomes possible to set a high gap magnetic flux density, which is a major factor in increasing the thrust of the motor. Therefore, it can output a considerably high thrust and is optimal as a driving source for changing the direction of the hammer bank 2.

Next, regarding the constant velocity section (printing area) of the hammer bank 2, since the thrust required to perform this constant velocity control is considerably smaller than that required during direction change as described above, the rotary motor 10 may be small.

The switching operation between the linear motor 5 and the rotary motor 10 as the swing drive source of the hammer bank 2 is performed using the position sensor 7.
This is done based on position signals from.

The operating principle of the present invention will be explained in more detail below with reference to FIG.

FIG. 3(a) shows the moving coil 5a and the cam follower 12.
When the hammer bank 2, which is integrated with the
generates thrust so that it moves to the right. At this time, since the deformable cam 11 attached to the rotary motor shaft 10a is located at a distance δ from the cam follower 12, it is not constrained by the thrust generated from the linear motor 5. That is, the deformable cam 11 at this time is not involved in driving the hammer bank 2.

FIG. 3 (bl shows a state in which the hammer bank 2 is located at a constant velocity section, and at this time, the cam follower 12, that is, the hammer bank 2
It is driven at a constant speed in the direction of arrow A.

FIG. 3(e) shows a case opposite to FIG. 3<=>, that is, when the hammer bank 2 is at the right end direction change position.

FIG. 3(d) shows the state when the hammer bank 2 moves from the right end direction change position shown in FIG. 3(C) to a constant velocity portion moving leftward. At this time, the beam near motor 5
The deformable cam 11 attached to the rotary motor shaft 5a contacts the cam follower 12 and drives the hammer bank 2 at a constant speed.

The power supply control to the linear motor 5 is easy because it can be carried out continuously for a certain period of time based on the edge (No. The shape of the cam can be considerably simplified by using a modified cam 11 in which only the portion corresponding to the direction change portion is removed based on a constant velocity cam.

〔Effect of the invention〕

As explained in detail above, the shuttle type line printer device of the present invention has a dual structure in which the drive source of the hammer bank is separated into a moving coil type linear motor and a rotary motor. This has great effects in that performance can be improved and constant speed control can also be simplified.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is an ideal speed curve diagram of a hammer bank, Fig. 3 is a diagram of the operating principle of the present invention, and Fig. 4 is a conventional shuttle type line printer. FIG. 2 is a perspective view showing the structure of the device. In the figure, l is a print head, 2 is a hammer bank, 3 is a guide mechanism, 4 is a printing paper, 5 is a moving coil type linear motor, 5
a is a moving coil, 7 is a position sensor, 9 is a platen, 10
is a rotating motor, 10a is a rotating motor shaft, 11 is a deformable cam, and 12 is a cam follower.

Claims (1)

[Claims] A hammer bank (2) equipped with a plurality of print heads (1).
) in a hammer bank drive configuration of a shuttle type line printer device that performs printing while swinging a printing paper (4) in a direction perpendicular to the feeding direction of the printing paper (4), wherein the hammer bank (2) is a moving coil type linear motor (5). is driven as a thrust generation source when changing direction, and the rotary motor (10) is configured to be driven as a thrust generation source when moving at a constant speed except when changing direction. Line printer equipment.