JPS6322246B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an X-
It relates to recording devices such as Y recorders and procs.

For example, as shown in Figure 1, an X-Y recorder generally includes a main carriage MC that moves in the x direction on a recording paper Ch in response to a variable x;
It consists of a pen cartridge PC that is mounted on the MC and moves in the y direction in response to the variable y, applies displacement corresponding to changes in the x and y variables to the recording pen from two directions that intersect with each other, and records the combined displacement amount. It is recorded on paper Ch.

The above-mentioned XY recorders have recently become larger and larger, and the recording paper Ch has also become larger, such as A ₁ to A ₀ sizes. For this reason, the main
If the shape of the MC increases while maintaining a similar shape, its weight will be proportional to the cube of the length of the main carriage MC, so for example, an X-Y recorder for _A3 size will be replaced with an X-Y recorder for _A1 size. If the design is redesigned into a Y recorder, the weight of the main carriage MC will theoretically increase eight times. Therefore, in order to maintain performance such as maximum acceleration and maximum pen speed as before, the input power of the motor that drives the main carriage MC must be increased by eight times, assuming that the main carriage MC is of similar shape. (actually smaller than this).

For this reason, it has been proposed to provide a total of two motors, one on each side of the main carriage MC, to drive the main carriage MC, but even with this, the weight of the main carriage MC is large. There are problems such as a decline in image quality and accuracy of recorded results due to the length of the wires that are connected between the main carriages MC. In other words, if the magnitudes of the variables x and y are equal and the accelerations of the X and Y axes are equal, then the
As shown in R ₁ , the recording result will be a straight line at 45 degrees to the X-Y axis, but if the X-axis acceleration is smaller than the Y-axis acceleration, recording will not be possible even if the variables The result will be R ₂ . Also, when writing fine print with a printer, the image quality will deteriorate if the actual acceleration, main carriage mass, and resonance characteristics (when using a step motor) are not the same on the X and Y axes. This is also facilitated by increasing the mass of the main carriage.

The present invention was made to solve the above-mentioned conventional problems, and by reducing the weight of the main carriage, it aims to reduce the power of the motor and improve the image quality. The present invention provides a recording device that further improves image quality by making the shaft drive system symmetrical. The present invention will be explained below with reference to the drawings.

FIG. 3 is a plan view of the X-axis drive mechanism according to the embodiment of the present invention, and FIG. 4 is a plan view of the Y-axis drive mechanism. In both figures, 1 is the main carriage, which includes a recording pen (not shown) and four pulleys 1a, 1b, 1c, 1.
d. 2, 3, 4, 5 are, for example, I-shaped auxiliary carriages, and arms 6, 7, 8,
9, 10, 11, 12, and 13, and rollers 14a, 14b, 15 are provided on the arms 6 to 9, respectively.
a, 15b, 16a, 16b and 17a, 17b
is attached. 18, 19, 20, 21
is a rail provided around the recording paper (not shown), and the rollers 14a to 17 of the auxiliary carriages 2 to 5
b is mounted on the rails 18 to 21, and the auxiliary carriages 2 to 5 can run on the rails 18 to 21 with extremely small force. 22a, 22b, 23a, 23
b, 24a, 24b and 25a, 25b are pulleys provided on the arms 10-13 of the auxiliary carriages 2-5, respectively.

MX is a motor that converts a variable x given to its input into a rotational output, and has a large diameter pulley 30a and a small diameter pulley 30b attached to its output shaft. MY is a motor that converts a variable y given to its input into a rotational output, and a large diameter pulley 31a and a small diameter pulley 31b are attached to its output shaft. Note that the diameters of the large-diameter pulleys 30a, 31a and the small-diameter pulleys 31a, 31b are selected at a ratio of 2:1, respectively. 32a, 32b, 32
c, 32d, 32e, 32f and 32g, 32
Guide pulleys h, 32i, 32j, 32k, and 32l are each loosely fitted to the fixed shaft.

33 is a wire with one end 33a fixed, and pulleys 23a, 1b, 23b, 30a, 32e, 22
b, 1a, 22a, then the other end 33b
is fixed. One end of the wire 35 is fixed to the arm 12 of the auxiliary carriage 4, and the wire 35 is connected to the pulleys 32a, 3.
The other end of the wire 36 is fixed to the arm 13 of the auxiliary carriage 5 via wires 0b and 32c, and one end of the wire 36 is fixed to the arm 12 of the auxiliary carriage 4, and the wire 36
The other end is fixed to the arm 13 of the auxiliary carriage 5 via 2f, 32d, and 32b. On the other hand, wire 3
7 has one end 37a fixed, and pulleys 25b, 1
d, 25a, 31a, 32l, 24a, 1c, 2
The other end 37b is fixed via 4b. Further, the wire 38 has one end fixed to the arm 11 of the auxiliary carriage 3, and the other end fixed to the arm 10 of the auxiliary carriage 2 via pulleys 32h, 31b, and 32j.
0, and the other end is fixed to the arm 11 of the auxiliary carriage 3 via pulleys 32i, 32k, and 32g.

In the main carriage drive mechanism constructed as described above, the operation of the X-axis system will first be explained with reference to FIG. When the motor MX rotates, for example, in the direction of the arrow due to the variable
The other auxiliary carriage 5 is also displaced in the direction of the arrow by means of a wire 36 to which one end is fixed. On the other hand, large diameter pulley 3
The wire 33, which is hung on the wire 0a and has both ends 33a and 33b fixed, displaces the main carriage 1 in the direction of the arrow. At this time, the displacement of the main carriage 1 and the auxiliary carriages 4 and 5 is 1:1 due to the pulley principle.
becomes.

Next, the action of the Y-axis system will be explained with reference to FIG. When the motor My rotates, for example, in the direction of the arrow due to the variable y, the wire 3 hung on the small pulley 31b
8, the auxiliary carriage 2 is displaced in the direction of the arrow,
The auxiliary carriage 3 is also displaced in the direction of the arrow by means of a wire 39, one end of which is fixed thereto. On the other hand, the wire 37 hung on the pulley 31a displaces the main carriage 1 in the direction of the arrow. In the Y-axis drive mechanism as well, the amount of displacement between the main carriage 1 and the auxiliary carriages 2 and 3 is 1:1, similar to the X-axis drive mechanism.

In the above explanation, the drive mechanism of the recording pen was explained separately into the X-axis system (Figure 3) and the Y-axis system (Figure 4) for convenience, but in an actual recording device, the drive mechanism of the X-axis system and A Y-axis drive mechanism is incorporated into one device, the combined displacement of variables x and y is added to the main carriage, and the combined variables of x and y are recorded on recording paper using a recording pen attached to the main carriage.

FIG. 5 is a plan view of another embodiment of the X-axis auxiliary carriage drive mechanism of the present invention. In this embodiment, the auxiliary carriage 4a is formed in a square shape, the arm 12a is provided with pulleys 12b, 12c, and the pulleys 30a, 30b of the motor MX are formed to have the same diameter. The wire 42 has one end 42a fixed, and pulleys 41a, 24b, 41b, 30a,
41c, 41d, 24a, 41e to the other end 42
b is fixed. Although not shown, the drive mechanism of the main carriage is the same as that shown in FIG. In this embodiment, both ends of the wires of the drive mechanisms for the main carriage and the auxiliary carriage are fixed, so the diameters of the pulleys 30a and 30b attached to the output shaft of the motor MX are configured to be equal based on the principle of a pulley. The displacement of the main carriage and the displacement of the auxiliary carriage are set at a ratio of 1:1. Note that the drive mechanism of the Y-axis system is the same as that in FIG. 4.

FIG. 6 is a plan view of yet another embodiment of the X-axis auxiliary carriage drive mechanism of the present invention. In this embodiment, the diameters of the pulleys 30a and 30b of the electric motor MX are set to 2:1, and the small diameter pulley 30b is used to drive the auxiliary carriage. One end of the wire 43 was fixed to the arm 12 of the auxiliary carriage 4, and then fixed to the arm 13 of the auxiliary carriage 5 via pulleys 43a, 43b, and 43c, and one end of the wire 44 was fixed to the arm 13 of the auxiliary carriage 5. Afterwards, the auxiliary carriage 4 passes through pulleys 44a, 44b, and 44c.
is fixed to the arm 12 of. Furthermore, the wire 45
One end is fixed to the arm 13 of the auxiliary carriage 5,
It is fixed to the arm 13 of the auxiliary carriage 5 via pulleys 30b and 45a. In this embodiment as well, the drive system for the main carriage is the same as that shown in FIG. 3, and the drive mechanism for the Y-axis system is the same as that in the embodiment shown in FIG.

As is clear from the above description, the present invention has the following significant effects.

(1) The movable parts consisting of the main carriage and the auxiliary carriage have been significantly reduced in weight, and the main carriage drive system and the auxiliary carriage drive system have been configured separately, so the main carriage and the auxiliary carriage can be moved smoothly. Furthermore, the power of the drive motor can be reduced regardless of the size of the recording paper.

(2) Since the movable parts are lightweight, there is no need for wires to stretch, and image quality and recording accuracy can therefore be improved.

(3) Since the X-axis system and the Y-axis system are made symmetrical (they have almost the same configuration), the accelerations of both are equal, and the image quality can be further improved.

[Brief explanation of drawings]

Figure 1 is a perspective view of the principle of a conventional XY recorder, Figure 2 is a recording characteristic diagram of the XY recorder, and Figure 3 is a diagram of the recording characteristics of the XY recorder.
5 and 4 are plan views of an embodiment of the present invention, and FIGS. 5 and 6 are plan views of another embodiment of the present invention. 1: Main carriage, 2, 3, 4, 5: Auxiliary carriage, MX: X-axis motor, MY: Y-axis motor, 30a, 30b, 31a, 31b: Pulley,
33, 35, 36, 37, 38, 39: wire.

Claims (1)

[Claims] 1. A main carriage equipped with a recording pen and four pulleys, a plurality of auxiliary carriages equipped with rollers running on rails provided around the recording paper and equipped with pulleys, and an X-axis system and Two pulleys each attached to a Y-axis motor and a plurality of guide pulleys, one pulley each of the two pulleys attached to each of the X-axis and Y-axis motors. A main carriage drive system that displaces the main carriage via separate wires, and an auxiliary carriage drive system that displaces the auxiliary carriage via separate wires using other pulleys. recording device.