JPS627563A - Shuttle-type line printer - Google Patents

Abstract

PURPOSE:To ensure that a hammer bank is stopped always at a predetermined position, by providing a moving coil type linear motor with a moving coil for stopping at a home position. CONSTITUTION:The hammer bank 3 having both end parts supported by a hammer bank guide mechanism 1 is oscillated in a direction orthogonal to the feeding direction of a printing paper 5 by a flat moving coil type linear motor 100, thereby printing. The linear motor 100 comprises permanent magnets 103, yokes 104 and a moving coil 101 for normal oscillation and the moving coil 102 for stopping at the home position, which coils are inserted in non- contact manner between the above members. The hammer bank 3 is oscillated in the directions of arrows A-A' by energizing the coil 101, and is stopped at a predetermined position by energizing the coil 102.

Description

[Detailed Description of the Invention] [Summary] The shuttle type line printer device of the present invention includes two types of moving coils that act on the hammer bank, namely, a moving coil for normal swinging and a moving coil for stopping the home position.
The hammer bank is designed to always stop at the home position when the power to the normal swing moving coil that drives the hammer bank is cut off.

Therefore, the hammer bank becomes ready for printing immediately after being restarted, so that printing efficiency is improved.

[Industrial application field]

The present invention relates to improvements in line printer devices, and particularly to a shuttle type line printer device configured such that a hammer bank always stops at a predetermined home position.

[Conventional technology]

In general, moving coil type linear motors generate electromagnetic force proportional to current, making speed control easy, and since contactless power transmission is possible, they have been considered as a swing drive source for shuttle type line printer equipment, and some It's being used.

FIG. 4 is a perspective view showing the configuration of a shuttle type line printer device equipped with the moving coil type linear motor.

As shown in the figure, the shuttle type line printer device includes a hammer bank 3 on which a plurality of print heads 2 are mounted, a moving coil type linear motor 205 that swings the hammer bank 3 in the direction of arrow A-A', and a hammer bank 3. It includes a guide mechanism 203 that controls the swinging direction of the bank, and a position detection sensor 204 that detects the position of the hammer bank 3.

The moving coil type linear motor 205 is composed of a fixed part 200 equipped with a permanent magnet and a yoke (not shown) and a moving coil 205a, and swings the hammer bank 3 in the direction of arrow A-A' by controlling the supply of electricity to the moving coil 205a. make it move.

Then, the printing head 2 mounted on the hammer bank 3 prints on the printing paper 5 on the platen 9.

The direction change command and constant speed running command for the hammer bank 3, the energization command to the moving coil 205a, etc. are handled by the control unit 1.
0 and is output from the drive section 20.

FIG. 5 is a diagram showing the energization mode to the moving coil type linear motor and the speed curve of the hammer bank during normal rocking,
a) to (d) show the energization state of the moving coil type linear motor based on the signal from the control unit IO, and the direction and magnitude of the electromagnetic force acting on the moving coil, that is, the hammer bank.The magnitude of the electromagnetic force is the length of the arrow. This is a diagram showing the
(El is a diagram showing an ideal speed curve of a hammer bank.

Figure 5(a) shows the state when the hammer bank 3 is located at the rightward/direction changing part in Figure 5(e), and Figure 5(b)
The hammer bank 3 is located in the right direction/constant speed section (in Fig. 5(e)).
Fig. 5 +C) shows the state when the hammer bank 3 is located in the left direction/direction change section, and Fig. 5 (d+ shows the state when the hammer bank 3 is also located in the left direction. The state when located in the direction/constant speed section (print area) is shown respectively.

During normal rocking, the coils are energized as shown in FIGS. 5A to 5D to give the hammer bank 3 the speed curve shown in FIG. 5E.

[Problem that the invention seeks to solve]

However, in the shuttle type line printer device, if the power to the moving coil linear motor 205 is inadvertently cut off to stop the swinging motion of the hammer bank 3, the hammer bank 3 and the moving coil 205a continue to run due to inertia. Therefore, there is a risk that the fixed portion 200 of the printer device and the hammer bank 3 will collide depending on the timing of cutting off the power supply.

The present invention attempts to solve the above problems by providing a shuttle type line printer device in which the hammer bank 3 always stops at a predetermined home position.

[Means for solving problems]

The shuttle type line printer device of the present invention includes a flat movable coil 101 for normal swinging that swings the hammer bank 3 and a home position stopping moving coil 102 that stops the hammer bank 3 at a predetermined position adjacent to the normal swing moving coil 101 for swinging the hammer bank 3. A moving coil type linear motor 100 is provided.

[Effect]

The hammer bank 3 is oscillated by controlling the energization to the normal oscillation movable coil 101, and the hammer bank 3 is stopped at the home position by controlling the energization to the home position stopping movable coil 102.

Therefore, even if the power supply to the moving coil type linear motor is stopped at random, a situation where the hammer bank collides with the fixed part of the device does not occur.

〔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 shuttle type line printer device of the present invention.

A hammer bank 3 whose both ends are supported by a hammer bank guide mechanism 1 is swung in a direction perpendicular to the feeding direction of the printing paper 5 by a flat movable coil type linear motor 100 disposed at the bottom of the hammer bank. to print.

The flat moving coil type linear motor 100 includes a permanent magnet 103 and a yoke 104 formed in a flat plate type, a flat plate type moving coil 101 for normal oscillation, and a moving coil for stopping the home position inserted between these members without contact. 102, the movable coil 10 for Hirajuku rocking
The hammer bank 3 is swung in the direction of the arrow A-A' by energizing the stopper coil 102, and the hammer bank 3 is stopped at a predetermined position by energizing the stopping movable coil 102.

11 is a stop coil support plate that fixes the home position stop movable coil 102 to the hammer bank 3;
is a swinging coil support plate that fixes the normal swinging movable coil 101 to the hammer bank 3.

Further, 105 is a magnetic circuit guide mechanism that can accurately position the entire magnetic circuit.

Normal swinging is performed based on information from a position detector (not shown) provided in the hammer bank guide mechanism 1.

FIG. 2 is a diagram showing the state of energization of the movable coil during normal rocking.

The moving coil 101 for normal swinging, which is integrated with the hammer bank 3 in FIG. Moving coil 101 in this case
In FIG. 2, reference numeral 101 indicates a movable coil that is energized during normal operation and startup, and reference numeral 102 indicates a movable coil for stopping the home position, which is the center of the present invention, which will be described later.

Further, 103 indicates a permanent magnet, and 104 indicates a yoke.

Note that during this normal operation, no current is applied to the moving coil 102 for stopping the home position.

Next, the principle and method for stopping the hammer bank 3 at the home position will be explained using FIG. 3.

FIGS. 3(a) to (4) are diagrams for explaining the present invention in detail.

When a stop signal is received while the hammer bank 3 is in normal operation (oscillating motion), as shown in FIG. Energization to coil 102 is started.

This energization to the home position stop movable coil 102 is based on a unipolar system, and unlike the energization 4 to the movable coil 101 for direction change and starting, the movable coil is always energized in one direction.

3rd opening) to (8) are diagrams showing the process until the movable coil, that is, the hammer bank stops at the home position.

In the figure, f1 to f9 are the magnitude of the force generated depending on the direction of the current and magnetic flux, and the length of the arrow is proportional to the magnitude of the force.)
and direction, and F indicates the resultant force.

FIG. 3(e) shows a state in which the movable coil, that is, the hammer bank 3 is stopped at home position 0.

For example, when a stop signal is activated in the state shown in FIG. 3(b), fl and f2 . An electromagnetic force f is generated in the opposite direction, and the electromagnetic force F moves the movable coil 102 toward the home position 0 toward the left in the drawing.

This electromagnetic force F may increase depending on the relationship between the coil and the magnetic force, but as the moving coil 102 approaches the home position O, it becomes smaller as shown in FIG. 3(d), and when F becomes zero, as shown in FIG. ).

If the position where F becomes zero does not match the home position 0, the entire magnetic circuit is adjusted by the magnetic circuit guide mechanism 105 shown in FIG. 11 for alignment.

Note that when the movable coil 102 stops at home position 0, the energization is discontinued, and the movable coil 102, that is, the hammer bank 3, naturally maintains its stopped state due to friction caused by its own weight.

In this way, the present invention can accurately stop the hammer bank 3, which swings together with the movable coils 101 and 102, at a desired home position.

Therefore, it is possible to print immediately after restarting, and since the restart can be controlled with one pattern, the structure simplifies drive control.

〔Effect of the invention〕

As explained in detail above, the shuttle type line printer device of the present invention can accurately stop the hammer bank at a desired home position, so printing can be performed immediately after restarting, and restarting can be done with just one pattern. Therefore, it is easy to control and has great effects, such as preventing collisions caused by inertia.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the shuttle type line printer device of the present invention, Fig. 2 is a schematic diagram showing the energization state of the moving coil during normal swinging, and Figs. 3(a) to (e). ) is a schematic diagram for explaining the present invention in detail, FIG. 4 is a perspective view showing the configuration of a shuttle type line printer device equipped with the moving coil type linear motor, and FIGS. It is a schematic diagram showing the energization mode to the moving coil type linear motor during rocking and the speed curve of the hammer bank. In the figure, 1 is the hammer bank guide mechanism, 2 is the print head, and 3 is the hammer bank guide mechanism.
1 is a hammer bank, 5 is a printing paper, 9 is a platen, 10 is a control unit, 11 is a stop coil support plate, 12 is an oscillation coil support plate, 20 is a drive unit, 100 is a flat moving coil type linear motor, 101 is a Moving coil for normal swing, 10
2 is a moving coil for stopping the home position, 103 is a permanent magnet, 104 is a yoke, 105 is a magnetic circuit guide mechanism,
200 is a fixing mechanism, 203 is a guide mechanism, 204 is a position detection sensor, and 205 is a moving coil linear motor. b Mei Shieko 4 Tsumei 4 Mari Shitaku 113! ! 1 Naki Phil Geki Rini R Stone - 24W'''ft Encounter 4 Nobuta Nobu tL R No. 551

Claims (1)

[Claims] The hammer bank 3 placed on the guide mechanism 1 is connected to the printing paper 9.
This is a shuttle type line printer device comprising a flat moving coil linear motor 100 that is driven in a direction perpendicular to the feeding direction of The hammer bank 3 is made to swing by controlling the energization to the movable coil 101 for normal swinging, and the hammer bank 3 is made to home by controlling the energization to the movable coil 102 for stopping the home position. A shuttle-type line printer device characterized in that it is configured to be stopped at a position.