JP2000088615A - Multi-point and multi-color recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a feed mechanism having a simple structure by converting a lateral reciprocal pendulum motion of an ink ribbon to a unidirectional feed motion of the ribbon through a ratchet mechanism. SOLUTION: An ink ribbon 8-8 faces parallel to a recording paper wound around a platen. When a pendulum-driven motor 12 rotates it clockwise, a cam 16 is repelled by a pin 15 of a wheel 14 but pulled back in place by a spring 17. When a pendulum-driven motor 12 rotates it counterclockwise, the cam 16 contacts the pin 15 but is blocked from rotating by a stopper 18 to rotate the wheel 14 clockwise. Thus, the cam 16, the pin 15 of the wheel 14 and the spring 17 form a ratchet mechanism rotating in one direction only. The wheel 14 is rotated clockwise to rotate a final stage gear 13-3 counterclockwise to wind up the ink ribbon 8-8 from left to right.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-point multi-color recorder, and more particularly, to an improvement in an ink ribbon feeding mechanism for wire dot printing.

[0002]

2. Description of the Related Art FIG. 2 is a block diagram showing an example of a ribbon feeding mechanism for printing a wire dot of a conventional multipoint multicolor recorder. In the drawing, a color ink ribbon 1-1 dyed into a plurality of colors along a width direction is stored in an ink ribbon cassette 1 so as to extend in a width direction of a recording paper (not shown). A holder 2 for holding the ink ribbon cassette 1 is provided with a gear box 3 for holding a gear group for feeding the ink ribbon 1-1 with an appropriate resolution and load. The motor 4 for winding in the direction of is provided.

[0003] Rotating shafts 5 are provided on both side surfaces of the holder 2. On one side surface of the holder 2, a predetermined color assigned to each measurement point with the rotation shaft 5 as a fulcrum is mounted on a carriage (not shown) mounted on a carriage that reciprocates in a direction perpendicular to the recording paper feed direction. To face
A gear 6 for transmitting pendulum power for reciprocating the ink ribbon 1-1 in the width direction is provided. This gear 6
The rotation output of the motor 7 capable of normal and reverse rotation for generating pendulum power is transmitted to the motor.

[0004] In this way, the magnitudes of the measured values at a plurality of measurement points are dot-recorded in a predetermined color assigned to each measurement point.

[0005]

However, according to such a conventional structure, the motor 4 for winding the ink ribbon 1-1 is provided. The cost of electronic components for controlling the motor 4 is increased. 2. The power consumption increases due to the rotational driving of the motor 4, and the temperature inside the chamber increases. 3. Since the motor 4 is attached to the holder 2 which reciprocates, mechanical stress is applied to the cable wiring to the motor 4 and there is a risk of disconnection due to fatigue.

[0006] To solve such problems,
The applicant filed Japanese Utility Model Application No. Hei 3-3957 (Japanese Utility Model Application No. Hei 4-9902).
No. 5) and Japanese Utility Model Application No. 3-4281 (Japanese Utility Model Application Laid-Open No. 4-10201).
No. 2). Although these do not require a motor for winding the ink ribbon, a gear mechanism for converting the reciprocating pendulum motion for determining the color of the ink ribbon into rotation in a fixed direction for winding the ink ribbon is used. There is a new problem of complexity.

The present invention focuses on such a conventional problem, and an object of the present invention is to realize a multi-point multi-color recorder using an ink ribbon feeding mechanism having a simple structure.

[0008]

According to a first aspect of the present invention, there is provided a color ink ribbon which is dyed into a plurality of colors along a width direction and is fed in a direction orthogonal to a feeding direction of a recording paper.
In a multi-point multi-color recorder configured to perform dot recording of the magnitudes of measurement values at a plurality of measurement points in a predetermined color, the reciprocating pendulum motion in the width direction of the ink ribbon in a certain direction via a ratchet mechanism. It is characterized in that it is converted into an ink ribbon feeding operation. Thereby, the reciprocating pendulum motion of the ink ribbon in the width direction and the feeding operation of the ink ribbon in a fixed direction can be realized by one motor without using a complicated gear mechanism as in the related art.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram showing one embodiment of the present invention,
It is the ribbon feeding mechanism viewed from the back side. In the ink ribbon cassette 8, a color ink ribbon 8-8 dyed in a plurality of colors along the width direction is stored so as to extend in the width direction of the recording paper (not shown). Rotating shafts 10 are provided on both side surfaces of the holder 9 that holds the ink ribbon cassette 8.

On one side surface of the holder 9, a predetermined color assigned to each measurement point with the rotation shaft 10 as a fulcrum is
A gear 11 for transmitting pendulum power for reciprocating the ink ribbon 8-8 in the width direction is provided so as to face a wire hammer mounted on a carriage that reciprocates in a direction orthogonal to the recording paper feeding direction (not shown). ing. The gear 11 is transmitted with a rotation output of a motor 12 capable of rotating forward and reverse to generate pendulum power.

Further, a gear group 1 for feeding the ink ribbon 8-8 at an appropriate resolution and load is provided on the back surface of the holder 9.
3 are provided. The gear group 13 is provided with a wheel 14.
5 is attached. For example, a frame (not shown) that is mechanically independent of the holder 9 is provided with a cam 16 that is rotatably supported and a spring 17 that is returned to a stopper 18 for holding the cam 16 at a predetermined position.

The operation of such a configuration will be described. A represents a normal state, and the ink ribbon 8-8 is opposed to the recording paper wound around a platen (not shown) in parallel. From this state, the pendulum power motor 12
When the cam 16 is rotated clockwise by the arrow A, the cam 16 is repelled by the pin 15 of the wheel 14 as shown by the chain line B, but is pulled back to the predetermined position shown by the solid line by the spring 17. In addition, as shown in FIG.
2, the cam 16 touches the pin 15 of the wheel 14, but the stopper 1
8 restricts the rotation and rotates the wheel 14 clockwise. That is, the cam 16 and the pin 1 of the wheel 14
A ratchet mechanism that rotates only in a certain direction is configured by the spring 5 and the spring 17.

When the wheel 14 rotates clockwise in this manner, the final gear 13-3 of the gear group 13 rotates counterclockwise to move the ink ribbon 8-8 from left to right as indicated by arrow C. Will be wound up.

[0014]

According to the present invention, the ink ribbon feed motor is not required. Since the motor and the electronic parts for controlling the motor are eliminated, the cost is reduced. 2. Power consumption and internal temperature can be reduced. 3. Since there is no motor cable, there is no danger of disconnection. And the cam 16 and the wheel 1
Since the ratchet mechanism is configured to rotate only in a fixed direction by the pin 15 and the spring 17, the load seen from the pendulum power motor 12 can be reduced as compared with the conventional configuration in which the load is always connected by a group of gears. As a result, it is possible to realize power saving corresponding to the amount by which the load on the motor can be reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of the present invention.

FIG. 2 is a configuration diagram of a conventional device.

[Explanation of symbols]

 Reference Signs List 8 Ink ribbon cassette 8-8 Color ink ribbon 9 Holder 10 Rotating shaft 11 Gear group 12 Pendulum power motor 13 Gear group 14 Wheel 15 Pin 16 Cam 17 Spring 18 Stopper

Claims (1)

[Claims] 1. A color ink ribbon which is dyed into a plurality of colors along a width direction and is sent in a direction orthogonal to a feeding direction of a recording paper, and measures a magnitude of a measurement value at a plurality of measurement points in a predetermined color. A multi-point multi-color recorder configured to record, wherein the reciprocating pendulum motion in the width direction of the ink ribbon is converted into a feeding operation of the ink ribbon in a fixed direction via a ratchet mechanism. Color recorder.