JPH03256772A - Oscillation control structure of serial printer - Google Patents

Abstract

PURPOSE:To prevent swing and oscillation by providing a structure in which a weight of almost the same mass as a printing head is allowed to move at the same acceleration as a printing head in an opposite direction. CONSTITUTION:A weight W of the same mass as a printing head 1 is attached to the side where the head 1 is provided and also to the opposite side of a belt 2 for moving the head 1. This design helps eliminate an oscillation conducted to an area outside a printer. As an alternative, a main printer system and an oscillation control device mounted outside the system are built in one piece and this contrivance eliminates propagation of an oscillation to other external equipment. The oscillation control device moves a weight W of the same mass as the printing head at the same acceleration as the head in a backward direction using a motor. The motor can use a power supply used for the movement of the printing head. In a printer with an insufficient power supply capacity, a separate power supply needs to be used under control through a branched interface of a printer. Thus, the lateral swing and lateral oscillation of a serial printer are eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention improves the environment of offices and the like containing OA type equipment, and reduces interference with other equipment due to vibration.

(b) Conventional technology In the field of the previous section (a), measures have been taken to reduce noise, but to combat vibration, there are methods that use damping of vibrational energy with cushions, etc., but these are not effective. When the device is stored in a relatively weak structure such as a computer rack, resonance causes the entire rack to sway.

(C) Problem to be solved by the invention The problem to be solved by the invention is the vibration that occurs when a serial printer prints, and this vibration is due to the inertia of the printer head. The heavier the weight and the faster the printing speed, the greater the vibration.

(=) Means for solving the problem In order to solve the problem in the previous section (c), create a structure in which a weight with approximately the same mass as the printer head is moved in the opposite direction to the printer head with the same acceleration. is resolved.

Therefore, Figure 1 shows a case where a vibration damping structure against the inertial force of the printer head is provided inside the serial printer.

FIG. 2 shows the case where it is attached to the outside of the printer as an option.

(Principle of the present invention) The printer head moves left and right inside the printer while performing a printing operation.

Therefore, a force F of F=mα is applied to the bridger body in the opposite direction to the moving direction of the head.

(Here, m is the quality of the printer head 1 α is the acceleration of the head) Acceleration α always repeats positive and negative values, although it depends on the printed matter, and the period of change of α is close to the natural period of the rack etc. Then, i! including the rack! The overall vibration will increase.

Furthermore, since the damping constant of the rack and the like is small, the motion is not strongly damped, but has periodic properties.

For this reason, it is necessary to eliminate the generation of vibration systems.

In the present invention, the force is balanced by the force -F against the inertial force F caused by the head.
It is sufficient to move an object with the same mass as -α.

(f) Example Examples are shown below based on the principle described in the previous section (N).

■When installing inside the printer As shown in Figure 81, on the side of the belt that moves the head opposite to where the head is attached, use the same material as the printer.
Vibration to the outside of the printer can be eliminated by attaching a weight W that will

■When installing outside the printer.

As shown in Figure 2, this is a restraining device that uses a motor to move a weight W with the same mass as the printer head in the opposite direction to the head at the same acceleration. This eliminates the propagation of vibrations to external equipment (racks, etc.).

However, the power supply for the motor may be the same as the power supply for the motor used to move the printer head, but in printers that lack power capacity, it is necessary to control and use a separate power supply using a branched printer interface.

By doing the steps ① and ② above, the lateral shaking and lateral vibration of the serial printer can be eliminated.

[Brief explanation of drawings]

Figure 1 shows a case where a restraining structure against the inertia force of the printer head is provided inside the serial printer. Figure 2 shows a case where an optional device with a restraining structure is attached to the outside of the printer. l...Printer head 2...Held 3...Head drive motor 4...Motor 5...Guide rail 6...Pulley W...Weight that generates inertial force Fig. 1

Claims (1)

[Claims] This structure uses the inertial force generated by the seismic device to cancel out the inertial force of the serial printer's head, which causes shaking, and eliminates shaking around the printer.